HK107997A - Perceptual coding of audio signals - Google Patents

Perceptual coding of audio signals

Info

Publication number
HK107997A
HK107997A HK107997A HK107997A HK107997A HK 107997 A HK107997 A HK 107997A HK 107997 A HK107997 A HK 107997A HK 107997 A HK107997 A HK 107997A HK 107997 A HK107997 A HK 107997A
Authority
HK
Hong Kong
Prior art keywords
audio signals
perceptual coding
perceptual
coding
audio
Prior art date
Application number
HK107997A
Other languages
English (en)
Inventor
Joseph Lindley Ii Hall
James David Johnston
Original Assignee
At & T Corp
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 At & T Corp filed Critical At & T Corp
Publication of HK107997A publication Critical patent/HK107997A/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/007—Two-channel systems in which the audio signals are in digital form
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory
    • 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
    • H04B1/665—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 using psychoacoustic properties of the ear, e.g. masking effect

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Analogue/Digital Conversion (AREA)
HK107997A 1988-12-30 1997-06-26 Perceptual coding of audio signals HK107997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29259888A 1988-12-30 1988-12-30

Publications (1)

Publication Number Publication Date
HK107997A true HK107997A (en) 1997-08-22

Family

ID=23125368

Family Applications (1)

Application Number Title Priority Date Filing Date
HK107997A HK107997A (en) 1988-12-30 1997-06-26 Perceptual coding of audio signals

Country Status (9)

Country Link
EP (1) EP0376553B1 (xx)
JP (1) JPH0748698B2 (xx)
KR (1) KR0137472B1 (xx)
AU (1) AU611067B2 (xx)
CA (1) CA2002015C (xx)
DE (1) DE68927927T2 (xx)
ES (1) ES2099695T3 (xx)
GR (1) GR3023926T3 (xx)
HK (1) HK107997A (xx)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE40280E1 (en) 1988-12-30 2008-04-29 Lucent Technologies Inc. Rate loop processor for perceptual encoder/decoder
EP0559348A3 (en) * 1992-03-02 1993-11-03 AT&T Corp. Rate control loop processor for perceptual encoder/decoder
DE4211945C1 (xx) * 1992-04-09 1993-05-19 Institut Fuer Rundfunktechnik Gmbh, 8000 Muenchen, De
CN1099777C (zh) * 1993-06-30 2003-01-22 索尼公司 数字信号的编码装置、解码装置和编码方法
US5632003A (en) * 1993-07-16 1997-05-20 Dolby Laboratories Licensing Corporation Computationally efficient adaptive bit allocation for coding method and apparatus
US5623577A (en) * 1993-07-16 1997-04-22 Dolby Laboratories Licensing Corporation Computationally efficient adaptive bit allocation for encoding method and apparatus with allowance for decoder spectral distortions
EP0643547B1 (en) * 1993-09-10 2001-07-18 Sony Corporation Quantization apparatus
BE1007616A3 (nl) * 1993-10-11 1995-08-22 Philips Electronics Nv Transmissiesysteem met vereenvoudigde broncodering.
KR0134318B1 (ko) * 1994-01-28 1998-04-29 김광호 채널간의 마스킹특성을 고려한 비트할당장치 및 그 방법과 복호화장치
US5488365A (en) * 1994-03-01 1996-01-30 Hewlett-Packard Company Method and apparatus for compressing and decompressing short blocks of data
FR2723493B1 (fr) * 1994-08-05 1997-01-10 France Telecom Procede et dispositif de codage et de decodage sonore par compression frequentielle, notamment pour application a une memoire de masse sonore.
US8041042B2 (en) 2006-11-30 2011-10-18 Nokia Corporation Method, system, apparatus and computer program product for stereo coding
EP3483879A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Analysis/synthesis windowing function for modulated lapped transformation
WO2019091573A1 (en) * 2017-11-10 2019-05-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for encoding and decoding an audio signal using downsampling or interpolation of scale parameters
CN113747236A (zh) * 2021-10-19 2021-12-03 江下信息科技(惠州)有限公司 一种基于多线程的音频格式高速转换方法及系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646061A (en) * 1985-03-13 1987-02-24 Racal Data Communications Inc. Data communication with modified Huffman coding
US4969192A (en) * 1987-04-06 1990-11-06 Voicecraft, Inc. Vector adaptive predictive coder for speech and audio
EP0314018B1 (en) * 1987-10-30 1993-09-01 Nippon Telegraph And Telephone Corporation Method and apparatus for multiplexed vector quantization

Also Published As

Publication number Publication date
AU4608389A (en) 1990-07-05
EP0376553A2 (en) 1990-07-04
JPH03121633A (ja) 1991-05-23
DE68927927D1 (de) 1997-05-07
KR900011162A (ko) 1990-07-11
EP0376553B1 (en) 1997-04-02
KR0137472B1 (ko) 1998-06-15
DE68927927T2 (de) 1997-07-17
CA2002015C (en) 1994-12-27
AU611067B2 (en) 1991-05-30
EP0376553A3 (en) 1992-05-20
CA2002015A1 (en) 1990-06-30
JPH0748698B2 (ja) 1995-05-24
GR3023926T3 (en) 1997-09-30
ES2099695T3 (es) 1997-06-01

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)