BR0204835A - Métodos para codificar um sinal de áudio, e para decodificar um fluxo de áudio, codificador de áudio, reprodutor de áudio, sistema de áudio, fluxo de áudio, e, meio de armazenamento - Google Patents

Métodos para codificar um sinal de áudio, e para decodificar um fluxo de áudio, codificador de áudio, reprodutor de áudio, sistema de áudio, fluxo de áudio, e, meio de armazenamento

Info

Publication number
BR0204835A
BR0204835A BR0204835-3A BR0204835A BR0204835A BR 0204835 A BR0204835 A BR 0204835A BR 0204835 A BR0204835 A BR 0204835A BR 0204835 A BR0204835 A BR 0204835A
Authority
BR
Brazil
Prior art keywords
audio
stream
signal
decoding
encoding
Prior art date
Application number
BR0204835-3A
Other languages
English (en)
Inventor
Arnoldus W J Oomen
Leon M Van De Kerkhof
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of BR0204835A publication Critical patent/BR0204835A/pt

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/14—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using a plurality of keys or algorithms
    • H04L9/16—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using a plurality of keys or algorithms the keys or algorithms being changed during operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible

Abstract

"MéTODOS PARA CODIFICAR UM SINAL DE áUDIO, E PARA DECODIFICAR UM FLUXO DE áUDIO, CODIFICADOR DE áUDIO, REPRODUTOR DE áUDIO, SISTEMA DE áUDIO, FLUXO DE áUDIO, E, MEIO DE ARMAZENAMENTO". Codificação de um sinal de áudio (x) é provida, onde o fluxo de bits codificado (AS) inclui uma representação paramétrica do sinal de áudio. Um componente da representação paramétrica inclui trilhas de componentes senoidais ligados (CS), onde componentes subseq³entemente ligados são codificados diferencialmente de parâmetros de componentes de sinal ligados já determinados. O codificador embaralha (18) os valores de freq³ência e/ou amplitude diferencialmente codificados mapeando os valores diferenciais sobre outros valores diferenciais (CSe). Modificando estes valores, o fluxo de bits ainda é decodificável, mas resulta em trilhas com variação de freq³ência e/ou amplitude aleatória. Por conseguinte, o sinal será degradado.
BR0204835-3A 2001-04-18 2002-04-09 Métodos para codificar um sinal de áudio, e para decodificar um fluxo de áudio, codificador de áudio, reprodutor de áudio, sistema de áudio, fluxo de áudio, e, meio de armazenamento BR0204835A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01201405 2001-04-18
PCT/IB2002/001281 WO2002087241A1 (en) 2001-04-18 2002-04-09 Audio coding with partial encryption

Publications (1)

Publication Number Publication Date
BR0204835A true BR0204835A (pt) 2003-06-10

Family

ID=8180170

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0204835-3A BR0204835A (pt) 2001-04-18 2002-04-09 Métodos para codificar um sinal de áudio, e para decodificar um fluxo de áudio, codificador de áudio, reprodutor de áudio, sistema de áudio, fluxo de áudio, e, meio de armazenamento

Country Status (10)

Country Link
US (1) US7319756B2 (pt)
EP (1) EP1382202B1 (pt)
JP (1) JP4391088B2 (pt)
KR (1) KR100927842B1 (pt)
CN (1) CN1274153C (pt)
AT (1) ATE334556T1 (pt)
BR (1) BR0204835A (pt)
DE (1) DE60213394T2 (pt)
ES (1) ES2266481T3 (pt)
WO (1) WO2002087241A1 (pt)

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KR101346771B1 (ko) * 2007-08-16 2013-12-31 삼성전자주식회사 심리 음향 모델에 따른 마스킹 값보다 작은 정현파 신호를효율적으로 인코딩하는 방법 및 장치, 그리고 인코딩된오디오 신호를 디코딩하는 방법 및 장치
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Also Published As

Publication number Publication date
JP2004531761A (ja) 2004-10-14
US20020154774A1 (en) 2002-10-24
WO2002087241A1 (en) 2002-10-31
JP4391088B2 (ja) 2009-12-24
ES2266481T3 (es) 2007-03-01
DE60213394D1 (de) 2006-09-07
EP1382202B1 (en) 2006-07-26
CN1463547A (zh) 2003-12-24
CN1274153C (zh) 2006-09-06
DE60213394T2 (de) 2007-08-23
KR20030010702A (ko) 2003-02-05
ATE334556T1 (de) 2006-08-15
KR100927842B1 (ko) 2009-11-23
EP1382202A1 (en) 2004-01-21
US7319756B2 (en) 2008-01-15

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

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B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2055 DE 25/05/2010.