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)
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)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Luminescent Compositions (AREA)
  • Pyridine Compounds (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 (14)

Country Link
US (4) US6680972B1 (pt)
EP (2) EP0940015B1 (pt)
JP (2) JP3871347B2 (pt)
CN (2) CN1206816C (pt)
AT (2) ATE257987T1 (pt)
AU (1) AU7446598A (pt)
BR (1) BR9805989B1 (pt)
DE (2) DE69831435T2 (pt)
DK (2) DK1367566T3 (pt)
ES (2) ES2247466T3 (pt)
HK (2) HK1030843A1 (pt)
PT (2) PT940015E (pt)
SE (1) SE512719C2 (pt)
WO (1) WO1998057436A2 (pt)

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AU7446598A (en) 1998-12-30
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CN1629937A (zh) 2005-06-22
SE9800268L (sv) 1998-12-11
EP1367566B1 (en) 2005-08-31
DE69821089T2 (de) 2004-11-11
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JP2005173607A (ja) 2005-06-30
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US20040078205A1 (en) 2004-04-22
BR9805989A (pt) 1999-08-31
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