GB2398215B - Method of and apparatus for converting an audio signal between data compression formats - Google Patents

Method of and apparatus for converting an audio signal between data compression formats

Info

Publication number
GB2398215B
GB2398215B GB0410811A GB0410811A GB2398215B GB 2398215 B GB2398215 B GB 2398215B GB 0410811 A GB0410811 A GB 0410811A GB 0410811 A GB0410811 A GB 0410811A GB 2398215 B GB2398215 B GB 2398215B
Authority
GB
United Kingdom
Prior art keywords
converting
audio signal
data compression
compression formats
formats
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 - Fee Related
Application number
GB0410811A
Other versions
GB0410811D0 (en
GB2398215A (en
Inventor
Michael Vincent Woodward
Gavin Robert Ferris
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.)
RadioScape Ltd
Original Assignee
RadioScape Ltd
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 GBGB0003954.5A external-priority patent/GB0003954D0/en
Application filed by RadioScape Ltd filed Critical RadioScape Ltd
Publication of GB0410811D0 publication Critical patent/GB0410811D0/en
Publication of GB2398215A publication Critical patent/GB2398215A/en
Application granted granted Critical
Publication of GB2398215B publication Critical patent/GB2398215B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G10L19/032—Quantisation or dequantisation of spectral components
    • 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
    • G10L19/173—Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (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)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
GB0410811A 2000-02-18 2001-02-19 Method of and apparatus for converting an audio signal between data compression formats Expired - Fee Related GB2398215B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0003954.5A GB0003954D0 (en) 2000-02-18 2000-02-18 Method of and apparatus for converting a signal between data compression formats
GB0104035A GB2359468B (en) 2000-02-18 2001-02-19 Method of and apparatus for converting an audio signal between data compression formats

Publications (3)

Publication Number Publication Date
GB0410811D0 GB0410811D0 (en) 2004-06-16
GB2398215A GB2398215A (en) 2004-08-11
GB2398215B true GB2398215B (en) 2004-09-22

Family

ID=32715137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0410811A Expired - Fee Related GB2398215B (en) 2000-02-18 2001-02-19 Method of and apparatus for converting an audio signal between data compression formats

Country Status (1)

Country Link
GB (1) GB2398215B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0637893A1 (en) * 1993-08-04 1995-02-08 Koninklijke KPN N.V. Transcoding device
EP0661885A1 (en) * 1993-12-28 1995-07-05 Canon Kabushiki Kaisha Image processing method and apparatus for converting between data coded in different formats
US5530750A (en) * 1993-01-29 1996-06-25 Sony Corporation Apparatus, method, and system for compressing a digital input signal in more than one compression mode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5530750A (en) * 1993-01-29 1996-06-25 Sony Corporation Apparatus, method, and system for compressing a digital input signal in more than one compression mode
EP0637893A1 (en) * 1993-08-04 1995-02-08 Koninklijke KPN N.V. Transcoding device
EP0661885A1 (en) * 1993-12-28 1995-07-05 Canon Kabushiki Kaisha Image processing method and apparatus for converting between data coded in different formats

Also Published As

Publication number Publication date
GB0410811D0 (en) 2004-06-16
GB2398215A (en) 2004-08-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090219