WO2008099303A1 - Video control unit - Google Patents

Video control unit Download PDF

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Publication number
WO2008099303A1
WO2008099303A1 PCT/IB2008/050436 IB2008050436W WO2008099303A1 WO 2008099303 A1 WO2008099303 A1 WO 2008099303A1 IB 2008050436 W IB2008050436 W IB 2008050436W WO 2008099303 A1 WO2008099303 A1 WO 2008099303A1
Authority
WO
WIPO (PCT)
Prior art keywords
video
control unit
display
parameters
video control
Prior art date
Application number
PCT/IB2008/050436
Other languages
French (fr)
Inventor
Matthieu Lentz
Original Assignee
Koninklijke Philips Electronics N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to EP20080702588 priority Critical patent/EP2113153A1/en
Priority to US12/526,634 priority patent/US20100103327A1/en
Priority to JP2009548782A priority patent/JP2010518722A/en
Publication of WO2008099303A1 publication Critical patent/WO2008099303A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/475—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/485—End-user interface for client configuration
    • H04N21/4854—End-user interface for client configuration for modifying image parameters, e.g. image brightness, contrast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/485—End-user interface for client configuration

Definitions

  • the invention relates to a video control unit for processing video signals and sending the so processed video signals to a video display.
  • video control unit that is often called “set-top box” (STB) serves to connect to a video display (TV receiver) and one or more external sources of signal, such as a satellite dish, a coaxial cable supplying TV signals, an ordinary VHF or UHF antenna, an Ethernet cable or even a telephone line with DSL connection.
  • STB set-top box
  • the basic function of the set-top box is to select and process the incoming signal so that it can be properly displayed on the connected video display.
  • a first aspect of the video control unit of the present invention is characterized in that the video control unit comprises a non- volatile memory in which generic picture calibration information is stored and means to send that generic picture calibration information to the video display for enabling the user to optimize the video display.
  • the video control unit is further characterized in that the generic picture calibration information is send to the video display when the video control unit is booted.
  • the term "generic picture calibration information" is supposed to mean information that can be send to whatever type or brand of video display and with which the user can easily optimize such parameters as contrast, brightness, color (saturation), tint (hue) and sharpness of the picture.
  • the generic calibration information may e.g. include 3 or 4 still picture test patterns. Such per se well-known test patterns may help the user to optimize the generic parameters of his display.
  • any connection between the set-top box and the video display can be used, either analog (SCART, component, composite or Y-C connector) or digital (HDMITM).
  • any type of display may be involved, from monitor, to rear projection, CRT or Flat TV.
  • a specific screen interface address "Picture Calibration" to set up the display is transferred from the set-top box to the display.
  • the still picture test patterns are sent to the TV.
  • the end user is then asked by the application to set up the correct value of brightness, color, contrast, tint and sharpness of his display.
  • the new values are stored in the video display for future use, so that the set up of the generic picture calibration information needs only to be done once.
  • the video control unit according to the invention may further be characterized by means to extract from the received video signal content-information-tables (DVB-SI tables) on the nature of the content (standard definition or high definition, Pal or NTSC-related, compression system used, etc.) and means to use said content information- tables to adapt the video signal to the nature of the content prior to sending the video signal to the video display.
  • DVD-SI tables content-information-tables
  • the type of the content that is watched by the user is taken into account for the calibration or modification of the video signal send to the video display.
  • This measure takes into account that the setting of the signal parameters is different if the processed video signal is in high or standard definition, relates to sport events or to a show in standard definition, etc.
  • Valuable information on the content of the video signal can be extracted from the DVB SI tables (cf ETSI EN 300 468 vl.7.1 2005-08).
  • SDT Service Description Table
  • This table there are two descriptors of special interest: The first one is the "component descriptor" which gives us the following information:
  • Standard definition or a High Definition content MPEG2 or H264/AVC video compression system, PAL related or NTSC related system (25Hz or 30Hz).
  • the second one is the "content descriptor" which gives some more info of the content type, such as movie/drama, news/current affairs, show, game, sports, music.
  • the video control unit may be characterized by a user interface that enables the user to input parameters on the specific type of the video display (LCD, PLASMA, Cathode Ray tube, video projector, rear projector) connected to the video control unit, means to store said specific type parameters and means to use said parameters for adapting the video signal to be sent to the specific type of display.
  • a window could be displayed on the user interface of the set-top box.
  • the application then asks the user to select the type of video display connected to the set-top box either LCD or plasma or CRT or video projector or rear projector.
  • the information is stored in the set-top box for all future occasions.
  • the Set Top Box is now aware of the type of content received (such as bit- rate, compression technology, TV system, High Definition) and the type of display technology used (such as LCD, PLASMA) to display the picture. With all these information it becomes very easy to adapt the content in order to get the best picture with no calibration anymore that has to be carried out by the end user.
  • the actions done by the set-top box may e.g. include: adapting the gamma filter of the set-top box, fine tuning the picture enhancement algorithm (example LTI filter), fine tuning the deblocking/ deringing algorithm, i.e. either minimize it or suppress it if bit rate is good enough.
  • the video control unit of the present invention may be characterized by means to receive, through specific descriptor in the HDMI standard, parameters on the specific type of the video display (led, plasma, crt, video projector, rear projector), means to store said specific type parameters and means to use said parameters for adapting the video signal to be sent to the specific type of display.
  • Figure 1 the architecture of a video control unit in which the invention is used
  • Figure 2 an example of a video display of a user interface for enabling the user to select parameters on the type of video display used.
  • the video control unit of figure 1 comprises usual elements such as a tuner 1, a demodulation stage 2, a demultiplexer 3 for demultiplexing the received video and audio signals, a video decoder 4, an audio decoder 5 and post-processing circuitry 6 for processing the decoded video- and audio-signals.
  • the arrows indicate the main signal transfer between the blocks.
  • the signals from the post-processing circuitry 6 are applied through an audio/video-switch 7 to either a digital HDMI output 9 via the HDMI parser 13 or an analog output 8.
  • This analog output may typically be a SCART-, a component- or a composite- connector.
  • the video control unit of figure 1 further comprises a non- volatile memory 10.
  • This non- volatile memory has stored generic picture calibration information such as for instance a chart with a color bar, a chart with a multiburst bar and a chart to facilitate the brightness and contrast settings of the video display. This information is applied to the postprocessing circuitry, there added to the video channel of the video control unit and so send to the video display connected to the video control unit.
  • Information on the nature of the content of the received video signal is extracted from the video signal in the demultiplexer 3 and stored in a volatile memory 11. This information is used in the post-processing circuitry 6 to appropriately modify the video signal e.g. to modify the bit rate of the signal.
  • the user interface 12 may preferably contain an interface display that displays a selection menu as shown in figure 2.
  • this specific information is gathered automatically via the HDMI parser 13 and sent to the volatile memory 11 before being sent on the video display for confirmation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Computer Security & Cryptography (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Video controlunit (set-top box), which is arranged firstly to assist calibration ofwhatever type of TV brand withtest patterns included in the set-top boxmemory; secondlyto acquire the specific display technology of the video display and the type of content of the received video signal and finally, according to the type of content and the display technology, to apply specific picture improvement algorithm, or fine-tune the existing picture.

Description

Video control unit
FIELD OF THE INVENTION
The invention relates to a video control unit for processing video signals and sending the so processed video signals to a video display. Such video control unit, that is often called "set-top box" (STB) serves to connect to a video display (TV receiver) and one or more external sources of signal, such as a satellite dish, a coaxial cable supplying TV signals, an ordinary VHF or UHF antenna, an Ethernet cable or even a telephone line with DSL connection. The basic function of the set-top box is to select and process the incoming signal so that it can be properly displayed on the connected video display.
SUMMARY OF THE INVENTION
It is the purpose of the present invention to provide a set-top box that gives the user in all practical circumstances the best possible picture quality, while the signal optimization goes to a large extent automatically so that the end user has almost nothing to do. For that reason a first aspect of the video control unit of the present invention is characterized in that the video control unit comprises a non- volatile memory in which generic picture calibration information is stored and means to send that generic picture calibration information to the video display for enabling the user to optimize the video display. Preferably the video control unit is further characterized in that the generic picture calibration information is send to the video display when the video control unit is booted. In this application the term "generic picture calibration information" is supposed to mean information that can be send to whatever type or brand of video display and with which the user can easily optimize such parameters as contrast, brightness, color (saturation), tint (hue) and sharpness of the picture. The generic calibration information may e.g. include 3 or 4 still picture test patterns. Such per se well-known test patterns may help the user to optimize the generic parameters of his display.
For this operation, any connection between the set-top box and the video display can be used, either analog (SCART, component, composite or Y-C connector) or digital (HDMI™). Also any type of display may be involved, from monitor, to rear projection, CRT or Flat TV. When booting the set-top box, a specific screen interface address "Picture Calibration" to set up the display is transferred from the set-top box to the display. When activated, the still picture test patterns are sent to the TV. The end user is then asked by the application to set up the correct value of brightness, color, contrast, tint and sharpness of his display. As usual the new values are stored in the video display for future use, so that the set up of the generic picture calibration information needs only to be done once.
Preferably the video control unit according to the invention may further be characterized by means to extract from the received video signal content-information-tables (DVB-SI tables) on the nature of the content (standard definition or high definition, Pal or NTSC-related, compression system used, etc.) and means to use said content information- tables to adapt the video signal to the nature of the content prior to sending the video signal to the video display. By this measure the type of the content that is watched by the user is taken into account for the calibration or modification of the video signal send to the video display. This measure takes into account that the setting of the signal parameters is different if the processed video signal is in high or standard definition, relates to sport events or to a show in standard definition, etc.
Valuable information on the content of the video signal can be extracted from the DVB SI tables (cf ETSI EN 300 468 vl.7.1 2005-08). We can specially focus on the Service Description Table (SDT), which is used to list names and other parameters of the services. In this table there are two descriptors of special interest: The first one is the "component descriptor" which gives us the following information:
Standard definition or a High Definition content, MPEG2 or H264/AVC video compression system, PAL related or NTSC related system (25Hz or 30Hz).
The second one is the "content descriptor" which gives some more info of the content type, such as movie/drama, news/current affairs, show, game, sports, music... Additionally the video control unit according to the present invention may be characterized by a user interface that enables the user to input parameters on the specific type of the video display (LCD, PLASMA, Cathode Ray tube, video projector, rear projector) connected to the video control unit, means to store said specific type parameters and means to use said parameters for adapting the video signal to be sent to the specific type of display. When the video control unit is booted a window could be displayed on the user interface of the set-top box. The application then asks the user to select the type of video display connected to the set-top box either LCD or plasma or CRT or video projector or rear projector. When this has been done once, the information is stored in the set-top box for all future occasions. The Set Top Box is now aware of the type of content received (such as bit- rate, compression technology, TV system, High Definition) and the type of display technology used (such as LCD, PLASMA) to display the picture. With all these information it becomes very easy to adapt the content in order to get the best picture with no calibration anymore that has to be carried out by the end user. The actions done by the set-top box may e.g. include: adapting the gamma filter of the set-top box, fine tuning the picture enhancement algorithm (example LTI filter), fine tuning the deblocking/ deringing algorithm, i.e. either minimize it or suppress it if bit rate is good enough.
In case the video display is connected to the video control unit through a HDMI-connection the user interface for inputting the parameters on the specific type of the video display can be dispensed with and the video control unit of the present invention may be characterized by means to receive, through specific descriptor in the HDMI standard, parameters on the specific type of the video display (led, plasma, crt, video projector, rear projector), means to store said specific type parameters and means to use said parameters for adapting the video signal to be sent to the specific type of display.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will be further explained with reference to the accompanying drawing. Herein shows
Figure 1 the architecture of a video control unit in which the invention is used and
Figure 2 an example of a video display of a user interface for enabling the user to select parameters on the type of video display used.
DETAILED DESCRIPTION OF THE EMBODIMENTS
The video control unit of figure 1 comprises usual elements such as a tuner 1, a demodulation stage 2, a demultiplexer 3 for demultiplexing the received video and audio signals, a video decoder 4, an audio decoder 5 and post-processing circuitry 6 for processing the decoded video- and audio-signals. In the block diagram of figure 1 the arrows indicate the main signal transfer between the blocks.
The signals from the post-processing circuitry 6 are applied through an audio/video-switch 7 to either a digital HDMI output 9 via the HDMI parser 13 or an analog output 8. This analog output may typically be a SCART-, a component- or a composite- connector.
The video control unit of figure 1 further comprises a non- volatile memory 10. This non- volatile memory has stored generic picture calibration information such as for instance a chart with a color bar, a chart with a multiburst bar and a chart to facilitate the brightness and contrast settings of the video display. This information is applied to the postprocessing circuitry, there added to the video channel of the video control unit and so send to the video display connected to the video control unit.
Information on the nature of the content of the received video signal is extracted from the video signal in the demultiplexer 3 and stored in a volatile memory 11. This information is used in the post-processing circuitry 6 to appropriately modify the video signal e.g. to modify the bit rate of the signal.
Finally also specific information on the type of the video display is stored in the volatile memory 11 and applied to the post-processing circuitry. This specific information may be input by the user by means of a user interface 12, stored in the volatile memory 11 and subsequently used to modify the signal in the post-processing circuitry 6. The user interface 12 may preferably contain an interface display that displays a selection menu as shown in figure 2. Alternatively, in case the video display is connected to the video control unit through the HDMI interface 9, this specific information is gathered automatically via the HDMI parser 13 and sent to the volatile memory 11 before being sent on the video display for confirmation.

Claims

CLAIMS:
1. Video control unit for processing video signals and sending the so processed video signals to a video display characterized in that the video control unit comprises a nonvolatile memory (10) in which generic picture calibration information is stored and means (6,7,8,9) to send that generic picture calibration information to the video display for enabling the user to optimize the video display.
2. Video control unit as claimed in claim 1 characterized in that the generic picture calibration information is send to the video display when the video control unit is booted.
3. Video control unit as claimed in claim 1 characterized by means (3) to extract from the received video signal content-information-tables (DVB-SI tables) on the nature of the content and means (6) to use said content information-tables to adapt the video signal to the nature of the content prior to sending the video signal to the video display.
4. Video control unit as claimed in claim 1 characterized by a user interface (12) that enables the user to input parameters on the specific type of the video display connected to the video control unit, means (11) to store said specific type parameters and means (6) to use said parameters for adapting the video signal to be sent to the specific type of display.
5. Video control unit as claimed in claim 1 comprising an HDMI connector (9) for connection to the video display, characterized by means (13) to receive, through the HDMI connector, parameters on the specific type of the video display, means (10) to store said specific type parameters and means (6) to use said parameters for adapting the video signal to be sent to the specific type of display.
PCT/IB2008/050436 2007-02-13 2008-02-07 Video control unit WO2008099303A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20080702588 EP2113153A1 (en) 2007-02-13 2008-02-07 Video control unit
US12/526,634 US20100103327A1 (en) 2007-02-13 2008-02-07 Video control unit
JP2009548782A JP2010518722A (en) 2007-02-13 2008-02-07 Video control unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07300791.6 2007-02-13
EP07300791 2007-02-13

Publications (1)

Publication Number Publication Date
WO2008099303A1 true WO2008099303A1 (en) 2008-08-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/050436 WO2008099303A1 (en) 2007-02-13 2008-02-07 Video control unit

Country Status (5)

Country Link
US (1) US20100103327A1 (en)
EP (1) EP2113153A1 (en)
JP (1) JP2010518722A (en)
CN (1) CN101611622A (en)
WO (1) WO2008099303A1 (en)

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Also Published As

Publication number Publication date
EP2113153A1 (en) 2009-11-04
US20100103327A1 (en) 2010-04-29
CN101611622A (en) 2009-12-23
JP2010518722A (en) 2010-05-27

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