BR9805989B1 - método e aparelho para decodificar um sinal codificado. - Google Patents

método e aparelho para decodificar um sinal codificado.

Info

Publication number
BR9805989B1
BR9805989B1 BRPI9805989-0A BR9805989A BR9805989B1 BR 9805989 B1 BR9805989 B1 BR 9805989B1 BR 9805989 A BR9805989 A BR 9805989A BR 9805989 B1 BR9805989 B1 BR 9805989B1
Authority
BR
Brazil
Prior art keywords
codec
combination
perceptual quality
given
bitrate
Prior art date
Application number
BRPI9805989-0A
Other languages
English (en)
Portuguese (pt)
Other versions
BR9805989A (pt
Inventor
Lars Gustaf Liljeryd
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 SE9702213A external-priority patent/SE9702213D0/xx
Priority claimed from SE9704634A external-priority patent/SE9704634D0/xx
Application filed filed Critical
Publication of BR9805989A publication Critical patent/BR9805989A/pt
Publication of BR9805989B1 publication Critical patent/BR9805989B1/pt

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
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • 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
    • H04B1/667—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 a division in frequency subbands

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Quality & Reliability (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computational Linguistics (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Pyridine Compounds (AREA)
  • Luminescent Compositions (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Cosmetics (AREA)
BRPI9805989-0A 1997-06-10 1998-06-09 método e aparelho para decodificar um sinal codificado. BR9805989B1 (pt)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9702213A SE9702213D0 (sv) 1997-06-10 1997-06-10 A method and a device for bit-rate reduction using synthetic bandwidth expansion
SE9704634A SE9704634D0 (sv) 1997-12-12 1997-12-12 Synthetic bandwidth expansion of audio signals
SE9800268A SE512719C2 (sv) 1997-06-10 1998-01-30 En metod och anordning för reduktion av dataflöde baserad på harmonisk bandbreddsexpansion
PCT/IB1998/000893 WO1998057436A2 (en) 1997-06-10 1998-06-09 Source coding enhancement using spectral-band replication

Publications (2)

Publication Number Publication Date
BR9805989A BR9805989A (pt) 1999-08-31
BR9805989B1 true BR9805989B1 (pt) 2009-12-01

Family

ID=27355877

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI9805989-0A BR9805989B1 (pt) 1997-06-10 1998-06-09 método e aparelho para decodificar um sinal codificado.

Country Status (13)

Country Link
US (4) US6680972B1 (https=)
EP (2) EP0940015B1 (https=)
JP (2) JP3871347B2 (https=)
CN (2) CN1206816C (https=)
AT (2) ATE303679T1 (https=)
AU (1) AU7446598A (https=)
BR (1) BR9805989B1 (https=)
DE (2) DE69831435T2 (https=)
DK (2) DK1367566T3 (https=)
ES (2) ES2247466T3 (https=)
PT (2) PT940015E (https=)
SE (1) SE512719C2 (https=)
WO (1) WO1998057436A2 (https=)

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US6680972B1 (en) 2004-01-20
DE69831435T2 (de) 2006-06-14
US7328162B2 (en) 2008-02-05
SE512719C2 (sv) 2000-05-02
DE69821089T2 (de) 2004-11-11
WO1998057436A2 (en) 1998-12-17
PT1367566E (pt) 2005-11-30
US20040078205A1 (en) 2004-04-22
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US6925116B2 (en) 2005-08-02
DE69831435D1 (de) 2005-10-06
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