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ZA200710201B - Audio codec post-filter - Google Patents

Audio codec post-filter

Info

Publication number
ZA200710201B
ZA200710201B ZA200710201A ZA200710201A ZA200710201B ZA 200710201 B ZA200710201 B ZA 200710201B ZA 200710201 A ZA200710201 A ZA 200710201A ZA 200710201 A ZA200710201 A ZA 200710201A ZA 200710201 B ZA200710201 B ZA 200710201B
Authority
ZA
South Africa
Prior art keywords
filter
audio codec
codec post
post
audio
Prior art date
Application number
ZA200710201A
Other languages
English (en)
Inventor
Sun Xiaoqin
Wang Tian
Hosam A Khalil
Koishida Kazuhito
Chen Wei-Ge
Original Assignee
Microsoft 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 Microsoft Corp filed Critical Microsoft Corp
Publication of ZA200710201B publication Critical patent/ZA200710201B/xx

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
    • 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
    • G10L19/26—Pre-filtering or post-filtering
    • 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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • 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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Stereophonic System (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
ZA200710201A 2005-05-31 2006-04-05 Audio codec post-filter ZA200710201B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/142,603 US7707034B2 (en) 2005-05-31 2005-05-31 Audio codec post-filter

Publications (1)

Publication Number Publication Date
ZA200710201B true ZA200710201B (en) 2009-08-26

Family

ID=37464575

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA200710201A ZA200710201B (en) 2005-05-31 2006-04-05 Audio codec post-filter

Country Status (15)

Country Link
US (1) US7707034B2 (ko)
EP (1) EP1899962B1 (ko)
JP (2) JP5165559B2 (ko)
KR (2) KR101246991B1 (ko)
CN (1) CN101501763B (ko)
AU (1) AU2006252962B2 (ko)
CA (1) CA2609539C (ko)
EG (1) EG26313A (ko)
ES (1) ES2644730T3 (ko)
IL (1) IL187167A0 (ko)
MX (1) MX2007014555A (ko)
NO (1) NO340411B1 (ko)
NZ (1) NZ563461A (ko)
WO (1) WO2006130226A2 (ko)
ZA (1) ZA200710201B (ko)

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