WO1990013182A3 - Digitales codierverfahren - Google Patents

Digitales codierverfahren Download PDF

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Publication number
WO1990013182A3
WO1990013182A3 PCT/DE1990/000286 DE9000286W WO9013182A3 WO 1990013182 A3 WO1990013182 A3 WO 1990013182A3 DE 9000286 W DE9000286 W DE 9000286W WO 9013182 A3 WO9013182 A3 WO 9013182A3
Authority
WO
WIPO (PCT)
Prior art keywords
quantised
spectral
coding process
digital coding
coeffts
Prior art date
Application number
PCT/DE1990/000286
Other languages
English (en)
French (fr)
Other versions
WO1990013182A2 (de
Inventor
Bernhard Grill
Thomas Sporer
Bernd Kuerten
Ernst Eberlein
Karl-Heinz Brandenburg
Original Assignee
Fraunhofer Ges Forschung
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=6378865&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1990013182(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Priority to SU5010281A priority Critical patent/RU2141166C1/ru
Publication of WO1990013182A2 publication Critical patent/WO1990013182A2/de
Publication of WO1990013182A3 publication Critical patent/WO1990013182A3/de
Priority to NO913931A priority patent/NO307767B1/no
Priority to FI914886A priority patent/FI105731B/fi
Priority to KR91701385A priority patent/KR0136572B1/ko
Priority to US08/380,135 priority patent/US5579430A/en

Links

Classifications

    • 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
    • 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

Abstract

Beschrieben wird ein digitales Codierverfahren für die Übertragung und/oder Speicherung von akustischen Signalen und insbesondere von Musiksignalen, bei dem Abtastwerte des akustischen Signals mittels einer Transformation oder einer Filterbank in eine Folge von zweiten Abtastwerten transformiert werden, die die spektrale Zusammensetzung des akustischen Signals wiedergeben, und diese Folge von zweiten Abtastwerten entsprechend den Anforderungen mit unterschiedlicher Genauig-keit quantisiert und teilweise oder ganz mittels eines Optimalcodierers codiert wird, und bei dem bei der Wiedergabe eine entsprechende Decodierung und Rücktransformation erfolgt. Das erfindungsgemässe Verfahren zeichnet sich dadurch aus, dass in an sich bekannter Weise ein Codierer verwendet wird, bei dem die Auftrettswahrscheinlichkeit des quantiseirten Spektralkoeffizienten mit der Länge des Codes derart korreliert ist, dass das Codewort umso kürzer ist, je häufiger der Spektralkoeffizient auftritt, und dass zur Reduzierung der Tabellengrösse des Codierers entweder mehreren Elementen der Folge oder einem Wertebereichein Codewort sowie gegebenenfalls ein Zusatzcode zugeordnet werden, und dass ein Teil der Codewörter variabler Länge in einem Raster angeordnet wird, und dass die restlichen Codewörter in die verbleibenden Lücken verteilt werden, so dass ohne vollständige Decodierung oder bei fehlerhafter Übertragung der Anfang eines Codeworts leichter gefunden werden kann.
PCT/DE1990/000286 1989-04-17 1990-04-12 Digitales codierverfahren WO1990013182A2 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SU5010281A RU2141166C1 (ru) 1989-04-17 1990-04-12 Способ цифрового кодирования для передачи и/или накопления акустических сигналов
NO913931A NO307767B1 (no) 1989-04-17 1991-10-07 Digital koding av akustiske signaler
FI914886A FI105731B (fi) 1989-04-17 1991-10-16 Digitaalinen koodausmenetelmä
KR91701385A KR0136572B1 (en) 1989-04-17 1991-10-16 Digital encoding method
US08/380,135 US5579430A (en) 1989-04-17 1995-01-26 Digital encoding process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3912605A DE3912605B4 (de) 1989-04-17 1989-04-17 Digitales Codierverfahren
DEP3912605.6 1989-04-17

Publications (2)

Publication Number Publication Date
WO1990013182A2 WO1990013182A2 (de) 1990-11-01
WO1990013182A3 true WO1990013182A3 (de) 1991-01-10

Family

ID=6378865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1990/000286 WO1990013182A2 (de) 1989-04-17 1990-04-12 Digitales codierverfahren

Country Status (13)

Country Link
US (1) US5579430A (de)
EP (3) EP0393526B2 (de)
JP (1) JP2739377B2 (de)
KR (1) KR0136572B1 (de)
AT (3) ATE203359T1 (de)
DE (7) DE3943880B4 (de)
DK (1) DK0393526T4 (de)
ES (1) ES2088918T5 (de)
FI (1) FI105731B (de)
GR (1) GR3021283T3 (de)
NO (1) NO307767B1 (de)
RU (1) RU2141166C1 (de)
WO (1) WO1990013182A2 (de)

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EP0612156B1 (de) 1996-10-09
EP0717503B1 (de) 2001-07-18
JP2739377B2 (ja) 1998-04-15
WO1990013182A2 (de) 1990-11-01
DK0393526T3 (da) 1996-11-18
EP0612156A3 (de) 1994-09-07
NO913931D0 (no) 1991-10-07
DE59010419D1 (de) 1996-08-22
EP0717503A3 (de) 1996-07-17
DE59010923D1 (de) 2001-08-23
DE3943879B4 (de) 2008-07-17
EP0393526B2 (de) 2003-08-27
DE3943880B4 (de) 2008-07-17
KR0136572B1 (en) 1998-05-15
EP0393526B1 (de) 1996-07-17
ATE144090T1 (de) 1996-10-15
KR920702098A (ko) 1992-08-12
FI105731B (fi) 2000-09-29
EP0393526A3 (de) 1991-01-09
FI914886A0 (fi) 1991-10-16
EP0717503A2 (de) 1996-06-19
ES2088918T5 (es) 2004-01-01
DE3912605A1 (de) 1990-10-25
ATE203359T1 (de) 2001-08-15
NO913931L (no) 1991-10-07
US5579430A (en) 1996-11-26
DE3943881B4 (de) 2008-07-17
ATE140571T1 (de) 1996-08-15
EP0393526A2 (de) 1990-10-24
GR3021283T3 (en) 1997-01-31
DK0393526T4 (da) 2003-12-22
DE59010538D1 (de) 1996-11-14
JPH04504936A (ja) 1992-08-27
EP0612156A2 (de) 1994-08-24
NO307767B1 (no) 2000-05-22
RU2141166C1 (ru) 1999-11-10
DE3912605B4 (de) 2008-09-04
ES2088918T3 (es) 1996-10-01

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