CA2102099A1 - Variable rate vocoder - Google Patents

Variable rate vocoder

Info

Publication number
CA2102099A1
CA2102099A1 CA002102099A CA2102099A CA2102099A1 CA 2102099 A1 CA2102099 A1 CA 2102099A1 CA 002102099 A CA002102099 A CA 002102099A CA 2102099 A CA2102099 A CA 2102099A CA 2102099 A1 CA2102099 A1 CA 2102099A1
Authority
CA
Canada
Prior art keywords
rate
speech
frame
level
data packet
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002102099A
Other languages
French (fr)
Other versions
CA2102099C (en
Inventor
Paul E. Jacobs
William R. Gardner
Chong U. Lee
Klein S. Gilhousen
S. Katherine Lam
Ming-Chang Tsai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Paul E. Jacobs
William R. Gardner
Chong U. Lee
Klein S. Gilhousen
S. Katherine Lam
Ming-Chang Tsai
Qualcomm, Inc.
Qualcomm Incorporated
Qualcomm Inc.
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24866989&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2102099(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Paul E. Jacobs, William R. Gardner, Chong U. Lee, Klein S. Gilhousen, S. Katherine Lam, Ming-Chang Tsai, Qualcomm, Inc., Qualcomm Incorporated, Qualcomm Inc. filed Critical Paul E. Jacobs
Priority to CA002483322A priority Critical patent/CA2483322C/en
Priority to CA002483324A priority patent/CA2483324C/en
Priority to CA002483296A priority patent/CA2483296C/en
Publication of CA2102099A1 publication Critical patent/CA2102099A1/en
Application granted granted Critical
Publication of CA2102099C publication Critical patent/CA2102099C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • 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
    • G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
    • 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
    • G10L19/012—Comfort noise or silence coding
    • 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
    • G10L19/04—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 using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • 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
    • G10L19/04—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 using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/22—Mode decision, i.e. based on audio signal content versus external parameters
    • 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
    • G10L19/04—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 using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1682—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers
    • H04J3/1688—Allocation of channels according to the instantaneous demands of the users, e.g. concentrated multiplexers, statistical multiplexers the demands of the users being taken into account after redundancy removal, e.g. by predictive coding, by variable sampling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0014—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the source coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0046—Code rate detection or code type detection
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals
    • G10L2025/783—Detection of presence or absence of voice signals based on threshold decision
    • G10L2025/786—Adaptive threshold

Abstract

An apparatus and method for performing speech signal compression, by variable rate coding of frames of digitized speech samples (10). The level of speech activity for each frame of digitized speech samples is determined and an output data packet rate is selected from a set of rates based upon the determined level of frame speech activity. A lowest rate of the set of rates corresponds to a detected minimum level of speech activity, such as background noise or pauses in speech, while a highest rate corresponds to a detected maximum level of speech activity, such as active vocalization. Each frame is then coded according to a predetermined coding format for the selected rate wherein each rate has a corresponding number of bits representative of the coded frame. A data packet is provided for each coded frame with each output data packet of a bit rate corresponding to the selected rate.
CA002102099A 1991-06-11 1992-06-03 Variable rate vocoder Expired - Lifetime CA2102099C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002483322A CA2483322C (en) 1991-06-11 1992-06-03 Error masking in a variable rate vocoder
CA002483324A CA2483324C (en) 1991-06-11 1992-06-03 Estimation of background noise in a variable rate vocoder
CA002483296A CA2483296C (en) 1991-06-11 1992-06-03 Variable rate vocoder

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US71366191A 1991-06-11 1991-06-11
US713,661 1991-06-11
PCT/US1992/004605 WO1992022891A1 (en) 1991-06-11 1992-06-03 Variable rate vocoder

Related Child Applications (3)

Application Number Title Priority Date Filing Date
CA002483322A Division CA2483322C (en) 1991-06-11 1992-06-03 Error masking in a variable rate vocoder
CA002483296A Division CA2483296C (en) 1991-06-11 1992-06-03 Variable rate vocoder
CA002483324A Division CA2483324C (en) 1991-06-11 1992-06-03 Estimation of background noise in a variable rate vocoder

Publications (2)

Publication Number Publication Date
CA2102099A1 true CA2102099A1 (en) 1992-12-12
CA2102099C CA2102099C (en) 2006-04-04

Family

ID=24866989

Family Applications (6)

Application Number Title Priority Date Filing Date
CA002483324A Expired - Lifetime CA2483324C (en) 1991-06-11 1992-06-03 Estimation of background noise in a variable rate vocoder
CA002483296A Expired - Lifetime CA2483296C (en) 1991-06-11 1992-06-03 Variable rate vocoder
CA002635914A Abandoned CA2635914A1 (en) 1991-06-11 1992-06-03 Error masking in a variable rate vocoder
CA002483322A Expired - Lifetime CA2483322C (en) 1991-06-11 1992-06-03 Error masking in a variable rate vocoder
CA002102099A Expired - Lifetime CA2102099C (en) 1991-06-11 1992-06-03 Variable rate vocoder
CA002568984A Expired - Lifetime CA2568984C (en) 1991-06-11 1992-06-03 Variable rate vocoder

Family Applications Before (4)

Application Number Title Priority Date Filing Date
CA002483324A Expired - Lifetime CA2483324C (en) 1991-06-11 1992-06-03 Estimation of background noise in a variable rate vocoder
CA002483296A Expired - Lifetime CA2483296C (en) 1991-06-11 1992-06-03 Variable rate vocoder
CA002635914A Abandoned CA2635914A1 (en) 1991-06-11 1992-06-03 Error masking in a variable rate vocoder
CA002483322A Expired - Lifetime CA2483322C (en) 1991-06-11 1992-06-03 Error masking in a variable rate vocoder

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002568984A Expired - Lifetime CA2568984C (en) 1991-06-11 1992-06-03 Variable rate vocoder

Country Status (21)

Country Link
US (3) US5414796A (en)
EP (8) EP1998319B1 (en)
JP (7) JP3432822B2 (en)
CN (8) CN1909059A (en)
AT (4) ATE294441T1 (en)
AU (3) AU671952B2 (en)
BR (1) BR9206143A (en)
CA (6) CA2483324C (en)
DE (4) DE69233502T2 (en)
DK (2) DK0588932T3 (en)
ES (4) ES2240252T3 (en)
FI (5) FI120425B (en)
HK (3) HK1014796A1 (en)
HU (1) HU215861B (en)
IL (4) IL113988A (en)
MX (1) MX9202808A (en)
NO (1) NO319559B1 (en)
RU (1) RU2107951C1 (en)
SG (1) SG70558A1 (en)
WO (1) WO1992022891A1 (en)
ZA (1) ZA924082B (en)

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