DE69420848T2 - Sprachkodierer/-dekodierer mit fester bitrate - Google Patents

Sprachkodierer/-dekodierer mit fester bitrate

Info

Publication number
DE69420848T2
DE69420848T2 DE69420848T DE69420848T DE69420848T2 DE 69420848 T2 DE69420848 T2 DE 69420848T2 DE 69420848 T DE69420848 T DE 69420848T DE 69420848 T DE69420848 T DE 69420848T DE 69420848 T2 DE69420848 T2 DE 69420848T2
Authority
DE
Germany
Prior art keywords
decoder
speech encoder
fixed bitrate
bitrate
fixed
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
DE69420848T
Other languages
English (en)
Other versions
DE69420848D1 (de
Inventor
Antony Crossman
Brant Helf
Jixiong Huang
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.)
Polycom Inc
Original Assignee
Picturetel 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 Picturetel Corp filed Critical Picturetel Corp
Application granted granted Critical
Publication of DE69420848D1 publication Critical patent/DE69420848D1/de
Publication of DE69420848T2 publication Critical patent/DE69420848T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
DE69420848T 1993-07-07 1994-07-07 Sprachkodierer/-dekodierer mit fester bitrate Expired - Lifetime DE69420848T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US8830993A 1993-07-07 1993-07-07
US13440593A 1993-10-08 1993-10-08
PCT/US1994/007651 WO1995002240A1 (en) 1993-07-07 1994-07-07 A fixed bit rate speech encoder/decoder

Publications (2)

Publication Number Publication Date
DE69420848D1 DE69420848D1 (de) 1999-10-28
DE69420848T2 true DE69420848T2 (de) 2000-07-20

Family

ID=26778536

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69420848T Expired - Lifetime DE69420848T2 (de) 1993-07-07 1994-07-07 Sprachkodierer/-dekodierer mit fester bitrate

Country Status (5)

Country Link
EP (1) EP0708959B1 (de)
JP (1) JPH09503630A (de)
CA (1) CA2166723A1 (de)
DE (1) DE69420848T2 (de)
WO (1) WO1995002240A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3475985B2 (ja) * 1995-11-10 2003-12-10 ソニー株式会社 情報符号化装置および方法、情報復号化装置および方法
JP3255022B2 (ja) 1996-07-01 2002-02-12 日本電気株式会社 適応変換符号化方式および適応変換復号方式
US5924064A (en) * 1996-10-07 1999-07-13 Picturetel Corporation Variable length coding using a plurality of region bit allocation patterns
ATE323377T1 (de) * 1998-05-27 2006-04-15 Microsoft Corp Skalierbarer audiokodierer und dekodierer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5921039B2 (ja) * 1981-11-04 1984-05-17 日本電信電話株式会社 適応予測符号化方式
GB8421498D0 (en) * 1984-08-24 1984-09-26 British Telecomm Frequency domain speech coding
US4964166A (en) * 1988-05-26 1990-10-16 Pacific Communication Science, Inc. Adaptive transform coder having minimal bit allocation processing
US5042069A (en) * 1989-04-18 1991-08-20 Pacific Communications Sciences, Inc. Methods and apparatus for reconstructing non-quantized adaptively transformed voice signals
CA2032765C (en) * 1989-12-21 1995-12-12 Hidetaka Yoshikawa Variable rate encoding and communicating apparatus
US5559900A (en) * 1991-03-12 1996-09-24 Lucent Technologies Inc. Compression of signals for perceptual quality by selecting frequency bands having relatively high energy

Also Published As

Publication number Publication date
EP0708959B1 (de) 1999-09-22
EP0708959A4 (de) 1998-01-21
WO1995002240A1 (en) 1995-01-19
EP0708959A1 (de) 1996-05-01
CA2166723A1 (en) 1995-01-19
JPH09503630A (ja) 1997-04-08
DE69420848D1 (de) 1999-10-28

Similar Documents

Publication Publication Date Title
DE69027820T2 (de) Kodierer/Dekodierer mit adaptiver Quantisierung
DE69721349D1 (de) Sprachkodierung
DE69232904D1 (de) Sprachkodierer/-dekodierer und Kodierungs-/Dekodierungsverfahren
DE69330022T2 (de) Sprachdekoder
DE69132268D1 (de) Bildsignalkodierer/Dekodierer mit adaptiver Quantisierung
FR2722041B1 (fr) Decodeur de huffman
DE69730713D1 (de) Bildkoder und -dekoder
DE69227650T2 (de) Digitaler Sprachkodierer
DE69527577D1 (de) Bildkodierungsgerät mit mehreren Kodierern
BR9603743A (pt) Decodificador convolucional
DE69718163D1 (de) Kodierer mit veränderlicher bitrate
DE69314389T2 (de) Zweimoden langzeitprädiktion in sprechkodierung
DE69524890T2 (de) Parametrische Sprachkodierung
DE69420682T2 (de) Sprachdekodierer
DE69224253T2 (de) Sprachkodiergerät
DE69127134T2 (de) Sprachkodierer
DE69819460D1 (de) Übertrager mit verbessertem sprachkodierer und dekodierer
DE69527345T2 (de) CELP-Sprachkodierer mit verbessertem Langzeit-Prädiktor
DE69329476T2 (de) Sprachkodierungsystem
DE69636273D1 (de) Videokodierer und -dekodierer
DE69420200D1 (de) CELP Koder-Dekoder
DE69420848D1 (de) Sprachkodierer/-dekodierer mit fester bitrate
DE69305761D1 (de) Koder-Dekoder
FI960522A0 (fi) Integroitu puheenkoodaus
DE69229627D1 (de) Sprachkodierer mit veränderlicher bitrate

Legal Events

Date Code Title Description
8364 No opposition during term of opposition