DE69229627D1 - Sprachkodierer mit veränderlicher bitrate - Google Patents

Sprachkodierer mit veränderlicher bitrate

Info

Publication number
DE69229627D1
DE69229627D1 DE69229627T DE69229627T DE69229627D1 DE 69229627 D1 DE69229627 D1 DE 69229627D1 DE 69229627 T DE69229627 T DE 69229627T DE 69229627 T DE69229627 T DE 69229627T DE 69229627 D1 DE69229627 D1 DE 69229627D1
Authority
DE
Germany
Prior art keywords
voice encoder
various bitrate
various
bitrate voice
encoder
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
DE69229627T
Other languages
English (en)
Other versions
DE69229627T2 (de
Inventor
Antony Crossman
Edmund Thompson
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 DE69229627D1 publication Critical patent/DE69229627D1/de
Publication of DE69229627T2 publication Critical patent/DE69229627T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
DE69229627T 1991-03-05 1992-03-04 Sprachkodierer mit veränderlicher bitrate Expired - Lifetime DE69229627T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US66457991A 1991-03-05 1991-03-05
US66594891A 1991-03-06 1991-03-06
PCT/US1992/001844 WO1992015986A1 (en) 1991-03-05 1992-03-04 Variable bit rate speech encoder

Publications (2)

Publication Number Publication Date
DE69229627D1 true DE69229627D1 (de) 1999-08-26
DE69229627T2 DE69229627T2 (de) 1999-12-02

Family

ID=27099005

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69229627T Expired - Lifetime DE69229627T2 (de) 1991-03-05 1992-03-04 Sprachkodierer mit veränderlicher bitrate

Country Status (5)

Country Link
EP (1) EP0574523B1 (de)
JP (1) JP3130934B2 (de)
CA (1) CA2105387A1 (de)
DE (1) DE69229627T2 (de)
WO (1) WO1992015986A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5450130A (en) * 1994-03-30 1995-09-12 Radius Inc. Method and system for cell based image data compression
US6707827B1 (en) * 1999-11-12 2004-03-16 Siemens Information & Communication Networks, Inc. Method and apparatus for optimizing audio response in telephony-over-LAN systems
DE10052626A1 (de) * 2000-10-24 2002-05-02 Alcatel Sa Adaptiver Geräuschpegelschätzer
EP2226794B1 (de) * 2009-03-06 2017-11-08 Harman Becker Automotive Systems GmbH Hintergrundgeräuschschätzung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4696040A (en) * 1983-10-13 1987-09-22 Texas Instruments Incorporated Speech analysis/synthesis system with energy normalization and silence suppression
GB8421498D0 (en) * 1984-08-24 1984-09-26 British Telecomm Frequency domain speech coding
WO1989003140A1 (en) * 1987-09-30 1989-04-06 Deutsche Thomson-Brandt Gmbh Process for transmitting audio signals
US4964166A (en) * 1988-05-26 1990-10-16 Pacific Communication Science, Inc. Adaptive transform coder having minimal bit allocation processing
US4991213A (en) * 1988-05-26 1991-02-05 Pacific Communication Sciences, Inc. Speech specific adaptive transform coder
US4965830A (en) * 1989-01-17 1990-10-23 Unisys Corp. Apparatus for estimating distortion resulting from compressing digital data
US5042069A (en) * 1989-04-18 1991-08-20 Pacific Communications Sciences, Inc. Methods and apparatus for reconstructing non-quantized adaptively transformed voice signals
US5040217A (en) * 1989-10-18 1991-08-13 At&T Bell Laboratories Perceptual coding of audio signals

Also Published As

Publication number Publication date
JP3130934B2 (ja) 2001-01-31
DE69229627T2 (de) 1999-12-02
EP0574523A1 (de) 1993-12-22
CA2105387A1 (en) 1992-09-06
EP0574523B1 (de) 1999-07-21
EP0574523A4 (de) 1995-03-01
JPH06506330A (ja) 1994-07-14
WO1992015986A1 (en) 1992-09-17

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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: POLYCOM, INC., MILPITAS, CALIF., US