EP0725384A3 - Adaptive transform coding - Google Patents

Adaptive transform coding Download PDF

Info

Publication number
EP0725384A3
EP0725384A3 EP96200973A EP96200973A EP0725384A3 EP 0725384 A3 EP0725384 A3 EP 0725384A3 EP 96200973 A EP96200973 A EP 96200973A EP 96200973 A EP96200973 A EP 96200973A EP 0725384 A3 EP0725384 A3 EP 0725384A3
Authority
EP
European Patent Office
Prior art keywords
transform coding
adaptive transform
adaptive
coding
transform
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.)
Ceased
Application number
EP96200973A
Other languages
German (de)
French (fr)
Other versions
EP0725384A2 (en
Inventor
Philip J Wilson
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.)
AudioCodes San Diego Inc
Original Assignee
Pacific Communication Sciences Inc
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
Priority claimed from US07/199,360 external-priority patent/US4964166A/en
Application filed by Pacific Communication Sciences Inc filed Critical Pacific Communication Sciences Inc
Publication of EP0725384A2 publication Critical patent/EP0725384A2/en
Publication of EP0725384A3 publication Critical patent/EP0725384A3/en
Ceased 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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0212—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 spectral analysis, e.g. transform vocoders or subband vocoders using orthogonal transformation
    • 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
    • G10L19/002—Dynamic bit allocation
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/15—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being formant information

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
EP96200973A 1988-05-26 1989-05-25 Adaptive transform coding Ceased EP0725384A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US199360 1988-05-26
US07/199,360 US4964166A (en) 1988-05-26 1988-05-26 Adaptive transform coder having minimal bit allocation processing
EP19890907458 EP0416036A4 (en) 1988-05-26 1989-05-25 Improved adaptive transform coding

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP19890907458 Division EP0416036A4 (en) 1988-05-26 1989-05-25 Improved adaptive transform coding
EP89907458.7 Division 1989-05-25

Publications (2)

Publication Number Publication Date
EP0725384A2 EP0725384A2 (en) 1996-08-07
EP0725384A3 true EP0725384A3 (en) 1996-12-27

Family

ID=26124512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96200973A Ceased EP0725384A3 (en) 1988-05-26 1989-05-25 Adaptive transform coding

Country Status (1)

Country Link
EP (1) EP0725384A3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6330532B1 (en) * 1999-07-19 2001-12-11 Qualcomm Incorporated Method and apparatus for maintaining a target bit rate in a speech coder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
R.V.COX ET AL.: "REAL-TIME SIMULATION OF ADAPTIVE TRANSFORM CODING", IEEE ACOUSTICS, SPEECH, AND SIGNAL PROCESSING MAGAZINE, vol. ASSP-29, no. 2, April 1981 (1981-04-01), NEW YORK US, pages 147 - 154, XP002017066 *

Also Published As

Publication number Publication date
EP0725384A2 (en) 1996-08-07

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