CN1622694A - Method and equipment for playing multichannel digital sound - Google Patents
Method and equipment for playing multichannel digital sound Download PDFInfo
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- CN1622694A CN1622694A CNA2004100913660A CN200410091366A CN1622694A CN 1622694 A CN1622694 A CN 1622694A CN A2004100913660 A CNA2004100913660 A CN A2004100913660A CN 200410091366 A CN200410091366 A CN 200410091366A CN 1622694 A CN1622694 A CN 1622694A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/30—Control circuits for electronic adaptation of the sound field
- H04S7/302—Electronic adaptation of stereophonic sound system to listener position or orientation
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/30—Control circuits for electronic adaptation of the sound field
- H04S7/301—Automatic calibration of stereophonic sound system, e.g. with test microphone
Abstract
The invention discloses a method and an device for playing multichannel digital sound. A user can enjoy multichannel digital sound which is calibrated to be properly matched with a position of the user. The device includes a sound signal generation unit for generating a digital sound signal from a multichannel sound source data, and a channel calibration unit for storing a channel calibration matix set by a control signal generated based on user position information, the stored matix is used to calibrate the multichannel digital sound signal and carry the calibrated sound signal to a plurality of speakers. The method for playing the multichannel digital sound comprises generating the multichannel sound signal from the multichannel sound source data, setting the channel calibration matix based on the user position information inputted by the user, and using the set matix to calibrate the multichannel digital sound signal, then carrying the calibrated multichannel sound signal to the plurality of speakers.
Description
Technical field
The present invention relates to a kind of method and apparatus that is used to play multichannel digital sound, more particularly, relate to a kind of can be based on the method and apparatus that is used to play multichannel digital sound of the characteristic of user's position change loud speaker.
Background technology
Recently, household audio and video system catches on.Household audio and video system comprises TV and the video equipment that is designed to be reproduced in the cinema embodiment at that time at home.Term " home theater " even be used before beginning generally to use at digital versatile disc (DVD) player, but it has become universal when DVD player becomes more generally.DVD player provides the user more ambient sounds with respect to traditional audio system such as laser-optical disk (LD) player, video home system (VHS) and video compact disc (VCD) player.For example, when playing in the scene of film " Saving Private Ryan (Saving PrivateRyan), 1998 " neutron bomb in emission forwards on screen, in fact the sound of bullet shooting spread out of preposition loud speaker from rearmounted loud speaker.In addition, when at film " hacker kingdom (Matrix) " when helicopter circles in the air above the performer, moviegoer feels to have helicopter to circle in the air up.This stereo sound is realized by the multichannel digital sound system.Now, popular multi-channel sound system is as 5.1 sound channels or 6 sound channel digital audio systems.
5.1 sound channel system adds that by five discrete whole frequency range main sound channels (left side/right front sound channel, center channels and a left side/right back sound channel of putting of putting) optionally is used for subsonic finite bandwidth low-frequency effect (LEF) sound channel (0.1 sound channel) usually.The main sound channel that is positioned at user the place ahead refers to a left side/right front loud speaker of putting.This main loudspeaker mainly reproduces background music and effect sound.In addition, so it is bigger than other loud speaker dimensionally because this main loudspeaker helps the playback of stereo sound, but it must be greater than other loud speaker.Center channels refer to center loudspeaker and reproduce dialogue in voice sound such as the film and the song in the music but often comprise a spot of effect sound.It seems to transmit from the performer on video screen that thereby center loudspeaker is usually located at top beholder's perceived sounds of TV.Left back or the right back that sound channel is called rearmounted loud speaker or circulating loudspeaker and is placed on the user is put on a left side/right back.Rearmounted loud speaker is responsible for surrounding effect.This is looped around the past is monophonic sounds but current 5.1 sound channel systems that are used for of stereo surround.On the other hand, because low frequency is more non-directional than high frequency, freely place so carry the super woofer of low frequency bass.Common super woofer can reproduce still 20 to 30Hz, and the high-performance super woofer can reproduce the bass that is lower than 20Hz.Because low frequency covers effect to sound increase sound, so it can the manufacturing environment sound effect.Super woofer is divided into common super woofer and has the active super woofer of its own power amplifier, and present active super woofer is widely used owing to dynamic voice and volume control function.Except other loud speaker of super woofer is not an entity difference each other, but divide by their placement.Yet center loudspeaker can be different from other loud speaker a little to carry dialogue.
Except 5.1 sound channel systems, the multichannel digital sound playback system that has other kind is as 4 sound channels, 4.1 sound channels and 6.1 sound channel systems.For the household audio and video system with multichannel digital sound playback function is installed, loud speaker must be connected respectively to the corresponding audio signal output terminal that is arranged on the household audio and video system.
Figure 1A and 1B illustrate the layout of outlet terminal of 5.1 sound channel household audio and video systems and the placement of loud speaker respectively.
Each loud speaker has its own input terminal to be connected to the corresponding outlet terminal of acoustic playback equipment.That is, the left front loud speaker of putting should be connected to and left frontly puts the sound channel outlet terminal and center loudspeaker should be connected to the center channels outlet terminal.Loud speaker also should be placed on correct position.The left front loud speaker of putting should be placed on user's left front and right frontly put the right front that loud speaker should be placed on the user.The left back loud speaker of putting should be placed on user's left back and right backly put the right back that loud speaker should be placed on the user.Center loudspeaker can be placed on the top or the bottom of the screen display of the household audio and video system that can be placed on user the place ahead.Because super woofer is more non-directional than other loud speaker, so that it can be placed is in office to the position.After loud speaker was installed, the user can enjoy 5.1 channel stereo sounds.
Yet, if the user owing to the screen of arbitrary reason mobile household cinema system, all loud speakers should rearrange.That is, even the not mobile main loudspeaker of reason for convenience, the connection between the sound channel outlet terminal of main loudspeaker and sound playback apparatus should be changed.At this moment, so because it does not have the placement of direction super woofer or connects and needn't rearrange.When watching film if the user does not rearrange the connection between the outlet terminal on main loudspeaker and the sound playback apparatus in household audio and video system, then the direction of sound effect and dialogue and sound will not match.In addition, even as user only when enjoy music but not film, it is inconvenient that the user should listen to the music at preposition.Therefore, a kind of user of needs can be at the multichannel digital sound back method and the equipment of any position enjoy music and film.
Summary of the invention
In order to address the above problem, the invention provides a kind of multichannel digital sound back method and the equipment that is used to realize this method that can calibrate loudspeaker channel with the position of match user.
According to an aspect of the present invention, provide a kind of multichannel digital sound playback apparatus, this equipment comprises: the voice signal generation unit is used for producing the multi-channel sound signal from the multi-channel sound resource data; The sound channel alignment unit is used to store according to user position information by the sound channel calibration matrix of control signal setting, the sound that uses calibration matrix calibration multi-channel sound signal and carry calibration to loud speaker.
User position information is preferably imported by user's interface device by the user, and can comprise that the user wishes that direction and this direction faced comprise forward and backward a, left side and right when listening to the music.
According to another aspect of the present invention, a kind of method of multichannel digital sound playback reproducer is provided, and this method comprises: be provided with in the user position information based on user's input and produce the multi-channel sound signal from the multi-channel sound resource data after the sound channel calibration matrix is calibrated the multi-channel sound signal with the matrix that uses this setting; And the multi-channel sound signal that carries calibration is to a plurality of loud speakers.
When carrying the multi-channel sound signal of calibration, user position information is preferably imported by user's interface device.User position information comprises that the user wishes that direction and this direction faced comprise forward and backward a, left side and right when listening to the music.
According to another aspect of the present invention, provide a kind of multichannel digital sound calibrator (-ter) unit, this equipment comprises: input unit is used to receive the multichannel digital sound signal; The sound channel alignment unit is used to store the sound channel calibration matrix that is provided with by the control signal according to user position information, also transmits the voice signal of calibration to loud speaker based on this matrix calibration multi-channel sound signal.
Here, user position information is preferably by the user's interface device input, and user position information can comprise that the user wishes that direction and this direction of facing comprise forward and backward a, left side and right when listening to the music.
Description of drawings
Describe the preferred embodiments of the present invention in detail by the reference accompanying drawing, above-mentioned purpose of the present invention and advantage will become apparent, wherein:
Figure 1A illustrates the layout of the placement of the layout of outlet terminal of 5.1 sound channel household audio and video systems and the loud speaker that Figure 1B illustrates 5.1-sound channel household audio and video system;
Fig. 2 is the functional-block diagram according to multichannel household audio and video system of the present invention;
Fig. 3 is the flow chart that the method for calibration sound channel is shown when user's position change according to one embodiment of present invention;
Fig. 4 is the flow chart that the method for calibration sound channel is shown when user's position change according to another embodiment of the invention; With
Fig. 5 A to 5D illustrates the screen of the household audio and video system of the sound channel that demonstration differently calibrates based on user's position respectively.
Embodiment
Below, describe the preferred embodiments of the present invention in detail with reference to accompanying drawing.
Fig. 2 is the block diagram according to multichannel digital sound playback apparatus of the present invention.
With reference to Fig. 2, the multichannel digital sound playback apparatus comprises voice signal generation unit 30; Controller 20 is used to receive the user by the order of user's interface device 10 inputs and all parts of control playback apparatus; Sound channel alignment unit 40 is used to respond the control signal calibration loudspeaker channel that slave controller 20 produces; Display unit 50 is used to show the layout of sound channel and a plurality of loud speakers.What here, term " multichannel digital sound " was meant generation is meant digital audio data by three loudspeaker reproduction voice signals and term " voice resource data " at least.
Voice signal generation unit 30 uses the multi-channel sound resource data to produce the multi-channel sound signal.Because equipment shown in Figure 2 is 5.1 sound channel digital acoustic playback equipment, so voice signal generation unit 30 uses 5.1 multi-channel sound resource datas to produce left front loud speaker, right front loud speaker, center loudspeaker, left back loud speaker, the right back voice signal of putting loud speaker and super woofer put put put.The voice signal of this generation is sent to sound channel alignment unit 40.
The signal that sound channel alignment unit 40 receives the multi-channel sound signals and carries this reception by default calibration matrix is to each loud speaker.The back will be described the matrix of response by the control signal setting of controller 20 generations in detail.
Each parts of controller 20 control multichannel digital sound playback apparatus also produce the control command that control signal is imported by user's interface device 10 by the user with response.Controller 20 makes this equipment export the sound of the position of match user by adjusting the sound channel calibration matrix that is provided with by sound channel alignment unit 40 after receiving customer position information from user's interface device 10.
User's interface device 10 transmits control command by user's input to controller 20.User's interface device 10 can be used as remote control, uses the same screen demonstration (OSD) of touchscreen technology or the control button that is arranged on the multichannel digital sound playback apparatus to realize.The user can use user's interface device 10 to regulate volume, uses balancer function and realize record and play command.
In addition, the user can change sound channel and the characteristic that the sound channel calibration matrix changes loud speaker by user's interface device 10 input his or his positional information.
When the user controlled the multichannel digital sound playback apparatus, display unit 50 showed the state of a control of sound channel calibration.Display unit 50 can be monitor, screen or the dot matrix device that comprises light-emitting diode.When the user used OSD as user's interface device 10, extra display unit can omit.
The a plurality of loud speakers that receive channel sound signal and output channels sound are typically connected to the multichannel digital sound playback apparatus.Loud speaker is usually by cable or be wired to this equipment, but in the near future also can no cable connection.
The multichannel digital sound playback apparatus can be realized by comprising the voice signal generation unit that produces the multi-channel sound resource data.Yet the voice signal input unit that the voice signal generation unit can be received the multi-channel sound signal of being play by traditional multichannel digital sound playback apparatus substitutes.That is, multichannel digital sound playback unit and sound channel alignment unit can independently be realized.
To describe sound channel alignment unit 40 in detail below.The specification that runs through the application, term " sound channel " can be interpreted as being used for the voice resource of particular channel.With reference to Figure 1A, left frontly put loud speaker, right frontly put loud speaker, left backly put loud speaker, right back loud speaker, center loudspeaker and the super woofer put carries different voice resources.If be used for left frontly putting loud speaker, right frontly put loud speaker, left backly put loud speaker, the right back voice resource of putting loud speaker, center loudspeaker and super woofer is called sound channel 1, sound channel 2, sound channel 3, sound channel 4, sound channel 5 and sound channel 6 respectively, and left frontly put loud speaker, right frontly put loud speaker, left backly put loud speaker, right back loud speaker, center loudspeaker and the super woofer put is called loud speaker 1, loud speaker 2, loud speaker 3, loud speaker 4, loud speaker 5 and loud speaker 6 respectively, the voice signal that then is sent to loud speaker is defined as:
[expression formula 1]
C1, C2, C3, C4, C5 and C6 represent the voice signal that carries from sound channel 1, sound channel 2, sound channel 3, sound channel 4, sound channel 5 and sound channel 6 respectively in the formula, and S1, S2, S3, S4, S5 and S6 represent to be sent to the voice signal of loud speaker 1, loud speaker 2, loud speaker 3, loud speaker 4, loud speaker 5 and loud speaker 6 respectively.Unit in matrix (cell) H11 is to the value of the H66 change in location according to the user.According to user's position, unit H11 changes so that loud speaker is exported sound suitable and the location matches user to the value of H66.On the other hand, the voice signal that is carried by loud speaker in traditional multichannel digital sound playback apparatus is defined as:
[expression formula 2]
N represents the sequence number of sound channel in the formula, C1, C2, C3 ..., Cn-1 and Cn represent respectively from sound channel 1, sound channel 2, sound channel 3 ..., the voice signal of the voice resource of sound channel n-1 and sound channel n, and S1, S2, S3 ..., Sn-1 and Sn represent to be sent to respectively loud speaker 1, loud speaker 2, loud speaker 3 ..., the voice signal of loud speaker n-1 and loud speaker n.Simultaneously, having unit H11 is the sound channel calibration matrix to the matrix of Hnn, and unit H11 is to the value of the Hnn change in location according to the user.
The sound channel calibration matrix that is provided with by sound channel alignment unit 40 is by adder, multiplier, multiplexer and demultiplexer.
Be the method that is used for being provided with the sound channel calibration matrix below according to user's position with reference to Fig. 3 and Fig. 4.
The flow chart of the method for calibration sound channel when Fig. 3 is the position change that illustrates according to one embodiment of present invention as the user.
At first, use user's interface device input user position information step s10 user.User position information comprise position that the user is positioned at and user towards direction.The positional informations that great majority are simplified by promptly left and right, preceding with respect to the user's of multichannel digital sound playback apparatus direction and after form.According to the present invention, the user can listen stereo music from the sound of loud speaker output in any position by adjust each based on user position information.The easiest method that the sound channel calibration matrix of multichannel digital sound playback apparatus is set is to use the family to use user's interface device to import his or his positional information.Be developed if be used for the method for automatic track user, then such input treatment step can omit.
After user position information is transfused to, in step s20 multichannel digital sound playback apparatus user position information that more before had been provided with and the user position information of newly importing.If the previous information that is provided with is different with the information of new input, then upgrade at step s30 sound channel calibration matrix.Secondly, by determining at step s40 test loudspeaker whether user position information is provided with exactly.If the previous positional information that is provided with was identical with the information of new input, then loud speaker need not at step s30 renewal sound channel calibration matrix and tested.Loud speaker test sound, thus speech message produced then.For example, if loud speaker 1 is set to the left front loud speaker of putting, then message " this is the left front loud speaker of putting " produces at loud speaker 1.
As the result of loud speaker test, if all loud speakers are provided with rightly, then the user position information input process finishes.Otherwise, the positional information input process of coming duplicate customer by step s10 to s40 once more then at step s50.
The flow chart of the method for calibration sound channel when Fig. 4 is the position change that illustrates according to another embodiment of the invention as the user.
At first, import user position information step s110 user by user's interface device.Can be with the user position information of the method input user input identical with the step s10 that describes among Fig. 3.If user position information is transfused to, then in step s120 equipment user position information that more before had been provided with and the positional information of newly importing.If the previous position that is provided with is different with the information of new input, then upgrade the sound channel calibration matrix of sound channel alignment unit at step s130.Secondly, by determining at step s140 test loudspeaker whether user position information is provided with rightly.If previous configuration information is identical with new input information, then loud speaker need not at step s130 renewal sound channel calibration matrix and tests.By test loudspeaker, the user confirms whether the user imports user position information exactly.If user position information is imported exactly, then at the tuning loud speaker of step s160.Yet, if not input exactly of user position information is imported user position information once more at step s150.
Even sound channel is calibrated the position with match user, because the sound of loudspeaker reproduction changes according to the structure in the house that playback apparatus is installed and the furniture type in the house, so need the tuning step of loud speaker, i.e. step s160.The user can also fine calibrate sound channel to mate his or his hobby by the tuning step of loud speaker.Loud speaker tuning by adjusting each loud speaker volume or finish by the value that the effect of considering direction changes the parameter in the sound channel calibration matrix.
With reference to Fig. 5 A to 5D a kind of method of the voice signal value of user position information and transmission to loud speaker that be used to import described.
Fig. 5 A to 5D illustrates the sound channel align mode that is shown on the same panel type display (OSD).
With reference to Fig. 5 A, when the user faced the multichannel digital sound playback apparatus, he or she wished to listen to the music.The user is in the face of the multichannel digital sound playback apparatus shown in Fig. 5 A, and user position information is a default information.If the user is provided with direction " preceding " as user position information by viewing window pictures display system device (OSD), then the sound channel calibration matrix is defined as:
[expression formula 3]
Here, when in the starting stage multichannel digital sound playback apparatus being installed, the value of the unit in the sound channel calibration matrix can before be provided with or input newly as being expressed by expression formula 3 to 6.
Loud speaker carries the sound of the loud speaker outlet terminal output from the corresponding playback apparatus.Loud speaker 1 is set to the left front loud speaker of putting, and loud speaker 2 is set to the right front loud speaker of putting, and loud speaker 3 is set to the left back loud speaker of putting, and loud speaker 4 is set to the right back loud speaker of putting, and loud speaker 5 is set to center loudspeaker and loud speaker 6 is set to super woofer.
With reference to Fig. 5 B, the user makes his or his back towards the multichannel digital sound playback apparatus.In this case, with different under the situation of multichannel digital sound playback apparatus the user, each loud speaker is carried out the difference in functionality from other loud speaker.Here, the sound channel calibration matrix is set to:
[expression formula 4]
That is, loud speaker 4 becomes the left front loud speaker of putting, and loud speaker 3 becomes the right front loud speaker of putting, and loud speaker 2 becomes the left back loud speaker of putting, and loud speaker 1 becomes the right back loud speaker of putting, and loud speaker 6 becomes super woofer.Here, 4 performances of loud speaker 3 and loud speaker are responsible for carrying the function of the center loudspeaker of dialogue or voice.In other words, loud speaker 4 carries the channel sound that left front channel sound of putting loud speaker also has some center loudspeaker, and loud speaker 3 carries the channel sound that right front channel sound of putting loud speaker also has some center loudspeaker.Come to determine the ratio of the channel sound of the center loudspeaker that carries by loud speaker 3 and loud speaker 4 by expression formula 4 intermediate values " a ".So because voice are that factitious loud speaker 3 and loud speaker 4 reproduce dialogue or voice from the user back.Yet, can carry out himself function with actual center loudspeaker loud speaker 5, the mode that promptly carries dialogue or voice is provided with loud speaker.
With reference to Fig. 5 C, he or she wishes to listen to the music when the user faces the right of multichannel digital sound playback apparatus.At this moment, and make his or his back in the face of identical under the situation of multichannel digital sound playback apparatus the user, each loud speaker is carried out and is faced the different function of those functions under the situation of multichannel digital sound playback apparatus the user.Here, the sound channel calibration matrix is expressed as:
[expression formula 5]
Loud speaker 2 becomes the left front loud speaker of putting, and loud speaker 4 becomes the right front loud speaker of putting, and loud speaker 1 becomes the left back loud speaker, loud speaker 3 put and becomes and right backly put loud speaker and loud speaker 6 becomes super woofer.At this moment, loud speaker 2 and loud speaker 4 carry the dialogue sound that is carried by center loudspeaker usually.The ratio that is sent to the dialogue sound of loud speaker 2 and loud speaker 4 is determined by the value " b " of the unit in the matrix of expressing in expression formula 5.
With reference to Fig. 5 D, he or she wishes to listen to the music when the user faces the left side of multichannel digital sound playback apparatus.At this moment, with make his or his back in the face of identical under the situation of multichannel digital sound playback apparatus the user, each loud speaker is carried out and is faced the different function of those functions under the situation of multichannel digital sound playback apparatus the user, and the sound channel calibration matrix is expressed as:
[expression formula 6]
Shown in above expression formula, the left front function of putting loud speaker of loud speaker 3 performances, the right front function of putting loud speaker of loud speaker 1 performance, the left back function of putting loud speaker of loud speaker 4 performances, the right back function of putting loud speaker of loud speaker 2 performances, and the function of loud speaker 6 performance super woofers.Loud speaker 1 and loud speaker 3 are partly brought into play the function of the center loudspeaker that carries dialogue sound.The ratio of the dialogue sound that is carried by loud speaker 1 and loud speaker 3 is determined by the value " c " of unit in expression formula 6.
Loud speaker shown in Fig. 4 is tuning to be finished by the parameter value that is adjusted in the sound channel calibration matrix of being expressed by top expression formula.For example, can increase or reduce in the value " a ", " b " and " c " of unit in the matrix one.In addition, the value in the sound channel calibration matrix " 1 " can be weighted.In addition, word " voice signal is being transferred into loud speaker " is meant that loud speaker is connected to the outlet terminal of multichannel digital sound playback apparatus and by corresponding outlet terminal and cable voice signal is sent to loud speaker by cable.The electric signal that transmits is by the loud speaker output of sounding in air.
Under the situation of using the sound channel calibration matrix, M channel sound resource can change over N channel sound resource, and wherein N is less than M.That is, 5.1 channel sound can change over 2 channel stereo sound.At this moment, loud speaker can be calibrated and be defined as:
[expression formula 7]
S1 and S2 represent to be sent to the left side of stereo sound system and the signal of right loud speaker respectively in the formula.By put by 5.1 sound channels left front, left backly put, signal mid-and super woofer amplifies the left side that voice signal that suitable parameter value doubly produces is sent to the stereo sound system and puts loud speaker.By put by 5.1 sound channels right front, right backly put, signal mid-and super woofer amplifies the right side that voice signal that suitable parameter value doubly produces is sent to the stereo sound system and puts loud speaker.By being adjusted at the value of unit in the sound channel calibration matrix, the user can listen with the music of user's location matches and sound with a large amount of sound channels can change over the sound with a small amount of sound channel.
In comprising detailed description, it will be apparent to one skilled in the art that do not breaking away under the situation of principle of the present invention substantially, can make some changes and modification in a preferred embodiment.Though 5.1 sound channel digital acoustic playback equipment are described in the above embodiment of the present invention, the present invention should be not limited thereto.According to the present invention, the calibration sound channel of loud speaker is calibrated based on user position information with changing, thereby the present invention can be applied to 4.1 sound channels, 6.1 sound channels or other multichannel digital sound playback apparatus.Therefore, only to be used for general and descriptive understanding be not purpose for restriction to preferred embodiment disclosed by the invention.Therefore, scope of the present invention determined by appended claim rather than the description of front, and falls into that institute in the claim scope changes and the equivalent meaning is comprised wherein.
According to the present invention, the user can wish that the position of listening to the music easily changes the characteristic of the loud speaker of multichannel digital sound playback apparatus based on the user.That is, need not mobile substantially loud speaker, the user can use user's interface device to revise the characteristic of loud speaker simply.
Claims (30)
1, a kind of multichannel digital sound playback apparatus comprises:
The voice signal generation unit is used for producing digital audio signal from the multi-channel sound resource data; With
The sound channel alignment unit is used to store the sound channel calibration matrix that is provided with by the control signal that produces according to user position information, use the matrix calibration multi-channel sound signal of this storage, and the voice signal of transmission calibration is to a plurality of loud speakers.
2, multichannel digital sound playback apparatus according to claim 1, wherein, user position information is imported by user's interface device by the user.
3, multichannel digital sound playback apparatus according to claim 2, wherein, user position information comprises that the user wishes that direction and this direction faced comprise forward and backward a, left side and right when listening to the music.
4, multichannel digital sound playback apparatus according to claim 2, wherein, user's interface device is same panel type display (OSD).
5, multichannel digital sound playback apparatus according to claim 1, wherein, the sound channel calibration matrix calibration that voice signal is expressed by expression formula:
N represents the sequence number of sound channel in the formula, and C1 to Cn represents the multi-channel sound signal respectively, and S1 to Sn represents to be sent to the voice signal of loud speaker 1 to the calibration of loud speaker n respectively, and H11 to Hnn is illustrated in the value of unit in the sound channel calibration matrix.
6, multichannel digital sound playback apparatus according to claim 5, wherein, the multi-channel sound signal is 5.1 channel sound signals (n=6).
7, multichannel digital sound playback apparatus according to claim 6, wherein, if the user in the face of the direction of multichannel digital sound playback apparatus, then Jiao Zhun voice signal is calculated by following formula:
C1 is the left front channel sound signal of putting in the formula, C2 is the right front channel sound signal of putting, C3 is the left back channel sound signal of putting, C4 is the right back channel sound signal of putting, C5 is the center channels voice signal, C6 is the subwoofer channel sound signal, S1 is the left front channel sound signal of putting of calibration, S2 is the right front channel sound signal of putting of calibration, S3 is the left back channel sound signal of putting of calibration, S4 is the right back channel sound signal of putting of calibration, and S5 is that the center channels voice signal and the S6 of calibration is the subwoofer channel sound signal of calibration.
8, multichannel digital sound playback apparatus according to claim 6, wherein, if the user in the direction that makes his or his back in the face of the multichannel digital sound playback apparatus, then Jiao Zhun voice signal is calculated by following formula:
The value of the component of " a " is that be contained in calibration left front put channel sound signal and calibration in the formula the right front center channels voice signal of putting channel sound signal.
9, multichannel digital sound playback apparatus according to claim 6, wherein, user position information comprises the direction of indicating the right side, the voice signal of calibration is calculated by following formula:
The value of the component of " b " is that be contained in calibration left front put channel sound signal and calibration in the formula the right front center channels voice signal of putting channel sound signal.
10, multichannel digital sound playback apparatus according to claim 6, wherein, user position information comprises the direction in indication left side, the voice signal of calibration is calculated by following formula:
" c " the value of the component of the right front center channels voice signal of putting channel sound signal that is that be contained in calibration left front put channel sound signal and calibration in the formula.
11, a kind of multichannel digital sound back method comprises:
Produce the multi-channel sound signal from the multi-channel sound resource data; With
After based on the user position information by user's input the sound channel calibration matrix being set and using the matrix calibration multi-channel sound signal of this setting, the multi-channel sound signal that carries calibration is to a plurality of loud speakers.
12, multichannel digital sound back method according to claim 11, wherein, user position information is by importing by user's interface device when carrying the multi-channel sound signal of calibration.
13, multichannel digital sound back method according to claim 12, wherein, user position information comprises that the user wishes that direction and this direction faced comprise forward and backward a, left side and right when listening to the music.
14, multichannel digital sound back method according to claim 12, wherein, user's interface device is same panel type display (OSD).
15, multichannel digital sound back method according to claim 11, wherein, the sound channel calibration matrix calibration that voice signal is expressed by following formula:
N represents the sequence number of sound channel in the formula, and C1 to Cn represents the multi-channel sound signal respectively, and S1 to Sn represents to be sent to the voice signal of loud speaker 1 to the calibration of loud speaker n respectively, and H11 to Hnn is illustrated in the value of unit in the sound channel calibration matrix.
16, multichannel digital sound back method according to claim 15, wherein, the multi-channel sound signal is 5.1 channel sound signals (n=6).
17, multichannel digital sound back method according to claim 16, wherein, if the user in the face of the direction of multichannel digital sound playback apparatus, then Jiao Zhun voice signal is calculated by following formula:
C1 is the left front channel sound signal of putting in the formula, C2 is the right front channel sound signal of putting, C3 is the left back channel sound signal of putting, C4 is the right back channel sound signal of putting, C5 is the center channels voice signal, C6 is the subwoofer channel sound signal, S1 is the left front channel sound signal of putting of calibration, S2 is the right front channel sound signal of putting of calibration, S3 is the left back channel sound signal of putting of calibration, S4 is the right back channel sound signal of putting of calibration, and S5 is the center channels voice signal of calibration, and S6 is the subwoofer channel sound signal of calibration.
18, multichannel digital sound back method according to claim 16, wherein, if the user in the direction that makes his or his back towards the multichannel digital sound playback apparatus, then Jiao Zhun voice signal is calculated by following formula:
The value of the component of " a " is that be contained in calibration left front put channel sound signal and calibration in the formula the right front center channels voice signal of putting channel sound signal.
19, multichannel digital sound back method according to claim 16, wherein, user position information comprises the direction of indicating the right side, the voice signal of calibration is calculated by following formula:
The value of the component of " b " is that be contained in calibration left front put channel sound signal and calibration in the formula the right front center channels voice signal of putting channel sound signal.
20, multichannel digital sound back method according to claim 16, wherein, user position information comprises the direction in indication left side, the voice signal of calibration is calculated by following formula:
The value of the component of " c " is that be contained in calibration left front put channel sound signal and calibration in the formula the right front center channels voice signal of putting channel sound signal.
21, a kind of multichannel digital sound calibrator (-ter) unit comprises:
Input unit is used to receive the multi-channel sound signal; With
The sound channel alignment unit is used to store the sound channel calibration matrix that is provided with by the control signal that produces based on user position information, uses matrix calibration multi-channel sound signal of storing and the multi-channel sound signal that carries calibration to a plurality of loud speakers.
22, multichannel digital sound calibrator (-ter) unit according to claim 21, wherein, user position information is imported by user's interface device by the user.
23, multichannel digital sound calibrator (-ter) unit according to claim 22, wherein, user position information comprises that the user wishes that direction and this direction of facing comprise forward and backward a, left side and right when listening to the music.
24, multichannel digital sound calibrator (-ter) unit according to claim 22, wherein, user's interface device is same panel type display (OSD).
25, multichannel digital sound calibrator (-ter) unit according to claim 21, wherein, the sound channel calibration matrix calibration that voice signal is expressed by following formula,
N represents the sequence number of sound channel in the formula, and C1 to Cn represents the multi-channel sound signal respectively, and S1 to Sn represents to be sent to the voice signal of loud speaker 1 to the calibration of loud speaker n respectively, and H11 to Hnn is illustrated in the value of the unit in the sound channel correction matrix.
26, multichannel digital sound calibrator (-ter) unit according to claim 25, wherein, the multi-channel sound signal is 5.1 channel sound signals (n=6).
27, multichannel digital sound calibrator (-ter) unit according to claim 26, wherein, if the user in the face of the direction of multichannel digital sound playback apparatus, then Jiao Zhun voice signal is calculated by following formula:
C1 is the left front channel sound signal of putting in the formula, C2 is the right front channel sound signal of putting, C3 is the left back channel sound signal of putting, C4 is the right back channel sound signal of putting, C5 is the center channels voice signal, C6 is the subwoofer channel sound signal, S1 is the left front channel sound signal of putting of calibration, S2 is the right front channel sound signal of putting of calibration, S3 is the left back channel sound signal of putting of calibration, S4 is the right back channel sound signal of putting of calibration, and S5 is the center channels voice signal of calibration, and S6 is the subwoofer channel sound signal of calibration.
28, according to the multichannel digital sound calibrator (-ter) unit of claim 26, wherein, if the user in the direction that makes his or his back towards the multichannel digital sound playback apparatus, then Jiao Zhun voice signal is calculated by following formula:
The value of the component of " a " is that be contained in calibration left front put channel sound signal and calibration in the formula the right front center channels voice signal of putting channel sound signal.
29, multichannel digital sound calibrator (-ter) unit according to claim 26, wherein, user position information comprises the direction of indicating the right side, the voice signal of calibration is calculated by following formula:
The value of the component of " b " is that be contained in calibration left front put channel sound signal and calibration in the formula the right front center channels voice signal of putting channel sound signal.
30, multichannel digital sound calibrator (-ter) unit according to claim 26, wherein, user position information comprises the direction in indication left side, the voice signal of calibration is calculated by following formula:
The value of the component of " c " is that be contained in calibration left front put channel sound signal and calibration in the formula the right front center channels voice signal of putting channel sound signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| KR83746/2003 | 2003-11-24 | ||
| KR1020030083746A KR100678929B1 (en) | 2003-11-24 | 2003-11-24 | Method For Playing Multi-Channel Digital Sound, And Apparatus For The Same |
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| CNA2004100913660A Pending CN1622694A (en) | 2003-11-24 | 2004-11-24 | Method and equipment for playing multichannel digital sound |
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| CN (1) | CN1622694A (en) |
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| KR20050049967A (en) | 2005-05-27 |
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