DE3782245D1 - Digitale audiokompandierung und -fehlerbehandlung. - Google Patents

Digitale audiokompandierung und -fehlerbehandlung.

Info

Publication number
DE3782245D1
DE3782245D1 DE8787906954T DE3782245T DE3782245D1 DE 3782245 D1 DE3782245 D1 DE 3782245D1 DE 8787906954 T DE8787906954 T DE 8787906954T DE 3782245 T DE3782245 T DE 3782245T DE 3782245 D1 DE3782245 D1 DE 3782245D1
Authority
DE
Germany
Prior art keywords
digital audio
audio signal
samples
bit
sample
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.)
Expired - Lifetime
Application number
DE8787906954T
Other languages
English (en)
Other versions
DE3782245T2 (de
Inventor
Kent Walker
D Katznelson
Paul Moroney
Karl E Moerder
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.)
Engility LLC
Original Assignee
Cable Home Communication Corp
Titan 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 Cable Home Communication Corp, Titan Corp filed Critical Cable Home Communication Corp
Application granted granted Critical
Publication of DE3782245D1 publication Critical patent/DE3782245D1/de
Publication of DE3782245T2 publication Critical patent/DE3782245T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
    • 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
    • H03M7/3053—Block-companding PCM systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Error Detection And Correction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Amplifiers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
DE8787906954T 1986-09-19 1987-09-16 Digitale audiokompandierung und -fehlerbehandlung. Expired - Lifetime DE3782245T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US90977686A 1986-09-19 1986-09-19
US07/091,911 US4809274A (en) 1986-09-19 1987-09-04 Digital audio companding and error conditioning
PCT/US1987/002377 WO1988002201A1 (en) 1986-09-19 1987-09-16 Digital audio companding and error conditioning

Publications (2)

Publication Number Publication Date
DE3782245D1 true DE3782245D1 (de) 1992-11-19
DE3782245T2 DE3782245T2 (de) 1993-04-15

Family

ID=26784471

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787906954T Expired - Lifetime DE3782245T2 (de) 1986-09-19 1987-09-16 Digitale audiokompandierung und -fehlerbehandlung.

Country Status (10)

Country Link
US (1) US4809274A (de)
EP (1) EP0284627B1 (de)
JP (1) JPH0685509B2 (de)
AT (1) ATE81572T1 (de)
AU (1) AU601513B2 (de)
CA (1) CA1299751C (de)
DE (1) DE3782245T2 (de)
DK (1) DK175140B1 (de)
NO (2) NO176040C (de)
WO (1) WO1988002201A1 (de)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965825A (en) 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
US7831204B1 (en) 1981-11-03 2010-11-09 Personalized Media Communications, Llc Signal processing apparatus and methods
USRE47642E1 (en) 1981-11-03 2019-10-08 Personalized Media Communications LLC Signal processing apparatus and methods
US5101432A (en) * 1986-03-17 1992-03-31 Cardinal Encryption Systems Ltd. Signal encryption
CA1309665C (en) * 1987-06-27 1992-11-03 Kenzo Akagiri Amplitude compressing/expanding circuit
JPH01166632A (ja) * 1987-12-22 1989-06-30 Mitsubishi Electric Corp ディジタル信号の復号方法及びその回路
JP2624299B2 (ja) * 1988-06-09 1997-06-25 株式会社日立製作所 加速演算回路
SE464271B (sv) * 1990-03-23 1991-03-25 Televerket Foerfarande och anordning foer kryptering/dekryptering av digitalt flerljud i teve
US5241689A (en) * 1990-12-07 1993-08-31 Ericsson Ge Mobile Communications Inc. Digital signal processor audio compression in an RF base station system
JPH0581774A (ja) * 1991-09-20 1993-04-02 Olympus Optical Co Ltd 情報記録再生装置
EP0535889B1 (de) * 1991-09-30 1998-11-11 Sony Corporation Verfahren und Anordnung zur Audiodatenkompression
AU689506B2 (en) * 1993-11-04 1998-04-02 Sony Corporation Signal encoder, signal decoder, recording medium and signal encoding method
CN1111959C (zh) * 1993-11-09 2003-06-18 索尼公司 量化装置、量化方法、高效率编码装置、高效率编码方法、解码装置和高效率解码装置
US5615222A (en) * 1994-02-04 1997-03-25 Pacific Communication Sciences, Inc. ADPCM coding and decoding techniques for personal communication systems
US5946652A (en) * 1995-05-03 1999-08-31 Heddle; Robert Methods for non-linearly quantizing and non-linearly dequantizing an information signal using off-center decision levels
US5710781A (en) * 1995-06-02 1998-01-20 Ericsson Inc. Enhanced fading and random pattern error protection for dynamic bit allocation sub-band coding
JP3189660B2 (ja) * 1996-01-30 2001-07-16 ソニー株式会社 信号符号化方法
US5796842A (en) * 1996-06-07 1998-08-18 That Corporation BTSC encoder
US8908872B2 (en) * 1996-06-07 2014-12-09 That Corporation BTSC encoder
US5737434A (en) * 1996-08-26 1998-04-07 Orban, Inc. Multi-band audio compressor with look-ahead clipper
US6542612B1 (en) * 1997-10-03 2003-04-01 Alan W. Needham Companding amplifier with sidechannel gain control
US6597961B1 (en) 1999-04-27 2003-07-22 Realnetworks, Inc. System and method for concealing errors in an audio transmission
GB2409389B (en) * 2003-12-09 2005-10-05 Wolfson Ltd Signal processors and associated methods
KR20070054735A (ko) * 2004-10-20 2007-05-29 가부시키가이샤 야스카와덴키 인코더 신호 처리 장치 및 그 신호 처리 방법
US8321776B2 (en) * 2007-12-15 2012-11-27 Analog Devices, Inc. Parity error correction for band-limited digital signals
WO2011119137A1 (en) 2010-03-22 2011-09-29 Lrdc Systems, Llc A method of identifying and protecting the integrity of a set of source data

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863215A (en) * 1973-07-03 1975-01-28 Rca Corp Detector for repetitive digital codes
US3919690A (en) * 1975-02-27 1975-11-11 Gte Sylvania Inc Digital receiving apparatus
US4225751A (en) * 1978-12-18 1980-09-30 Harris Corporation Variable-angle, multiple channel amplitude modulation system
NL7901477A (nl) * 1979-02-26 1980-08-28 Philips Nv Geluidsweergave in een ruimte met een onafhankelijke geluidsbron.
US4295223A (en) * 1979-04-25 1981-10-13 Westinghouse Electric Corp. Digital signal/noise ratio amplifier apparatus for a communication system
US4249042A (en) * 1979-08-06 1981-02-03 Orban Associates, Inc. Multiband cross-coupled compressor with overshoot protection circuit
US4373115A (en) * 1980-08-18 1983-02-08 Kahn Leonard R Predictive distortion reduction in AM stereo transmitters
EP0117276B1 (de) * 1982-09-20 1990-05-09 Sanyo Electric Co., Ltd. Gerät zur Geheimübertragung
JPS6070836A (ja) * 1983-09-27 1985-04-22 Sansui Electric Co 送信装置
US4608456A (en) * 1983-05-27 1986-08-26 M/A-Com Linkabit, Inc. Digital audio scrambling system with error conditioning
US4752953A (en) * 1983-05-27 1988-06-21 M/A-Com Government Systems, Inc. Digital audio scrambling system with pulse amplitude modulation
US4701953A (en) * 1984-07-24 1987-10-20 The Regents Of The University Of California Signal compression system
US4704727A (en) * 1985-11-27 1987-11-03 Beard Terry D Low noise and distortion FM transmission system and method

Also Published As

Publication number Publication date
NO314239B1 (no) 2003-02-17
JPH01501748A (ja) 1989-06-15
EP0284627A4 (de) 1990-01-29
EP0284627A1 (de) 1988-10-05
NO940381D0 (no) 1994-02-07
DE3782245T2 (de) 1993-04-15
CA1299751C (en) 1992-04-28
NO176040B (no) 1994-10-10
JPH0685509B2 (ja) 1994-10-26
DK272588A (da) 1988-05-18
NO882137D0 (no) 1988-05-16
US4809274A (en) 1989-02-28
DK175140B1 (da) 2004-06-14
WO1988002201A1 (en) 1988-03-24
AU601513B2 (en) 1990-09-13
AU8103487A (en) 1988-04-07
NO882137L (no) 1988-07-18
EP0284627B1 (de) 1992-10-14
DK272588D0 (da) 1988-05-18
NO940381L (no) 1988-07-18
ATE81572T1 (de) 1992-10-15
NO176040C (no) 1995-01-18

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: THE TITAN CORP., SAN DIEGO, CALIF., US GENERAL INS