DE3782245T2 - Digitale audiokompandierung und -fehlerbehandlung. - Google Patents
Digitale audiokompandierung und -fehlerbehandlung.Info
- Publication number
- DE3782245T2 DE3782245T2 DE8787906954T DE3782245T DE3782245T2 DE 3782245 T2 DE3782245 T2 DE 3782245T2 DE 8787906954 T DE8787906954 T DE 8787906954T DE 3782245 T DE3782245 T DE 3782245T DE 3782245 T2 DE3782245 T2 DE 3782245T2
- 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
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
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 DE3782245D1 (de) | 1992-11-19 |
DE3782245T2 true 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)
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 |
USRE47642E1 (en) | 1981-11-03 | 2019-10-08 | Personalized Media Communications LLC | Signal processing apparatus and methods |
US7831204B1 (en) | 1981-11-03 | 2010-11-09 | 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 |
DE69231369T2 (de) * | 1991-09-30 | 2001-03-29 | Sony Corp | Verfahren und Einrichtung 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 |
EP0772925B1 (de) * | 1995-05-03 | 2004-07-14 | Sony Corporation | Nichtlineares quantisieren eines informationssignales |
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 |
US8908872B2 (en) * | 1996-06-07 | 2014-12-09 | That Corporation | BTSC encoder |
US5796842A (en) * | 1996-06-07 | 1998-08-18 | 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 |
EP2438511B1 (de) | 2010-03-22 | 2019-07-03 | LRDC Systems, LLC | Verfahren zur identifikation und zum schutz der integrität eines satzes von quelldaten |
Family Cites Families (13)
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 |
US4752953A (en) * | 1983-05-27 | 1988-06-21 | M/A-Com Government Systems, Inc. | Digital audio scrambling system with pulse amplitude modulation |
US4608456A (en) * | 1983-05-27 | 1986-08-26 | M/A-Com Linkabit, Inc. | Digital audio scrambling system with error conditioning |
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 |
-
1987
- 1987-09-04 US US07/091,911 patent/US4809274A/en not_active Expired - Lifetime
- 1987-09-16 EP EP87906954A patent/EP0284627B1/de not_active Expired - Lifetime
- 1987-09-16 JP JP62506390A patent/JPH0685509B2/ja not_active Expired - Lifetime
- 1987-09-16 DE DE8787906954T patent/DE3782245T2/de not_active Expired - Lifetime
- 1987-09-16 WO PCT/US1987/002377 patent/WO1988002201A1/en active IP Right Grant
- 1987-09-16 AU AU81034/87A patent/AU601513B2/en not_active Expired
- 1987-09-16 AT AT87906954T patent/ATE81572T1/de active
- 1987-09-16 CA CA000546986A patent/CA1299751C/en not_active Expired - Lifetime
-
1988
- 1988-05-16 NO NO882137A patent/NO176040C/no unknown
- 1988-05-18 DK DK198802725A patent/DK175140B1/da not_active IP Right Cessation
-
1994
- 1994-02-07 NO NO19940381A patent/NO314239B1/no unknown
Also Published As
Publication number | Publication date |
---|---|
DK272588D0 (da) | 1988-05-18 |
JPH0685509B2 (ja) | 1994-10-26 |
EP0284627A4 (de) | 1990-01-29 |
NO940381L (no) | 1988-07-18 |
NO882137D0 (no) | 1988-05-16 |
AU8103487A (en) | 1988-04-07 |
ATE81572T1 (de) | 1992-10-15 |
EP0284627A1 (de) | 1988-10-05 |
CA1299751C (en) | 1992-04-28 |
AU601513B2 (en) | 1990-09-13 |
JPH01501748A (ja) | 1989-06-15 |
EP0284627B1 (de) | 1992-10-14 |
WO1988002201A1 (en) | 1988-03-24 |
DK272588A (da) | 1988-05-18 |
NO176040C (no) | 1995-01-18 |
DK175140B1 (da) | 2004-06-14 |
NO940381D0 (no) | 1994-02-07 |
NO314239B1 (no) | 2003-02-17 |
NO176040B (no) | 1994-10-10 |
US4809274A (en) | 1989-02-28 |
NO882137L (no) | 1988-07-18 |
DE3782245D1 (de) | 1992-11-19 |
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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 |