BRPI0817982B1 - aparelho e método para codificar um sinal de áudio multicanal - Google Patents
aparelho e método para codificar um sinal de áudio multicanal Download PDFInfo
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- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
- G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
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- Stereophonic System (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
entre tempos | é relevante | para | as | freqüências | mais |
sensíveis. | |||||
0 processador de dizimação | 201 | é acoplado | a um | ||
processador de | branqueamento | 203 | que | está disposto | para |
Claims (4)
- REIVINDICAÇÕES1. Aparelho para codificar um sinal de áudio multicanal, o aparelho comprendendo:um receptor para receber o sinal de áudio multicanal que compreende pelo menos um primeiro sinal de áudio de um primeiro microfone e um segundo sinal de áudio de um segundo microfone;uma unidade de diferença de tempo para determinar a diferença entre tempos entre o primeiro sinal de áudio e o segundo sinal de áudio;uma unidade de retardo para gerar um sinal de áudio multicanal compensado do sinal de áudio multicanal ao retardar pelo menos um do primeiro sinal de áudio e o segundo sinal de áudio em resposta ao sinal de diferença entre tempos;uma unidade mono para gerar um sinal mono ao combinar canais do sinal de áudio multicanal compensado; e um codificador de sinal mono para codificar o sinal mono; o aparelho caracterizado pelo fato da unidade de diferença de tempo estar disposta para determinar correlações cruzadas entre o primeiro sinal de áudio e o segundo sinal de áudio para uma pluralidade de recuos de tempo, e determinar a diferença entre tempos em resposta às correlações cruzadas; e uma unidade de diferença de tempo comprendendo:uma máquina de estado de treliça tendo uma pluralidade de estados, cada uma da pluralidade de estados correspondendo a um recuo de tempo da pluralidade de recuos de tempo;uma unidade de via para determinar métrica de via paraPetição 870190118717, de 16/11/2019, pág. 13/21
- 2/4 estados da máquina de estado de treliça em resposta às correlações cruzadas; e uma unidade computacional para determinar métrica de estado para os estados em resposta a métrica de via associada a vias de estados anteriores para os estados atuais; e uma unidade para determinar a diferença entre tempos em resposta a métrica de estado.2. Aparelho, de acordo com a reivindicação 1, caracterizado pelo fato da unidade de diferença de tempo
estar disposta para filtrar por passagem baixa o primeiro sinal de áudio e o segundo sinal de áudio antes da correlação cruzada. 3 . Aparelho, de acordo com a reivindicação 1, caracterizado pelo fato da unidade de diferença de tempo estar disposta para dizimar o primeiro sinal de áudio e o segundo sinal de áudio antes da correlação cruzada.4. Aparelho, de acordo com a reivindicação 1, caracterizado pelo fato da unidade de retardo estar disposta para compensar a diferença entre tempos para um fator de dizimação da dizimação para determinar um retardo para pelo menos um do primeiro sinal de áudio e o segundo sinal de áudio.5. Aparelho, de acordo com a reivindicação 1, caracterizado pelo fato da unidade de diferença de tempo estar disposta para aplicar um branqueamento espectral no primeiro sinal de áudio e no segundo sinal de áudio antes da correlação.6. Aparelho, de acordo com a reivindicação 1, caracterizado pelo fato da unidade de diferença de tempoPetição 870190118717, de 16/11/2019, pág. 14/21 - 3/4 estar disposta para efetuar aberturas múltiplas do primeiro sinal de áudio e do segundo sinal de áudio antes da correlação cruzada.7. Aparelho, de acordo com a reivindicação 1, caracterizado pelo fato da unidade de retardo estar disposta para mudar de um primeiro retardo para um segundo retardo ao gerar um primeiro sinal de áudio multicanal compensado em resposta ao primeiro retardo e um segundo sinal de áudio multicanal compensado em resposta ao segundo retardo e combinar o primeiro sinal de áudio multicanal compensado e o segundo sinal de áudio multicanal compensado para gerar o sinal de áudio multicanal compensado.8. Método de codificar um sinal de áudio multicanal, o método comprendendo:receber o sinal de áudio multicanal que compreende pelo menos um primeiro sinal de áudio de um primeiro microfone e um segundo sinal de áudio de um segundo microfone;determinar uma diferença entre tempos entre o primeiro sinal de áudio e o segundo sinal de áudio;gerar um sinal de áudio multicanal compensado do sinal de áudio multicanal ao retardar pelo menos um de o primeiro sinal de áudio e o segundo sinal de áudio em resposta ao sinal de diferente entre tempos;gerar um sinal mono ao combinar canais do sinal de áudio multicanal compensado; e codificar o sinal mono em um codificador de sinal mono;e o método sendo caracterizado pelo fato de compreender ainda a etapa de determinar uma diferença entre temposPetição 870190118717, de 16/11/2019, pág. 15/21
- 4/4 compreendendo determinar correlações cruzadas entre o primeiro sinal de áudio e o segundo sinal de áudio para uma pluralidade de recuos de tempo, e determinar a diferença entre tempos em resposta às correlações cruzadas por 5 efetuar as etapas de:proporcionar uma máquina de estado de treliça tendo uma pluralidade de estados, cada uma da pluralidade de estados correspondendo a um recuo de tempo da pluralidade de recuos de tempo;10 determinar métrica de via para estados da máquina de estado de treliça em resposta às correlações cruzadas;determinar métrica de estado para os estados em resposta a métrica de via associada a vias de estados anteriores para os estados atuais; e15 determinar a diferença entre tempos em resposta a métrica de estado.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0718682.8A GB2453117B (en) | 2007-09-25 | 2007-09-25 | Apparatus and method for encoding a multi channel audio signal |
PCT/US2008/075703 WO2009042386A1 (en) | 2007-09-25 | 2008-09-09 | Apparatus and method for encoding a multi channel audio signal |
Publications (2)
Publication Number | Publication Date |
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BRPI0817982A2 BRPI0817982A2 (pt) | 2015-04-07 |
BRPI0817982B1 true BRPI0817982B1 (pt) | 2020-05-05 |
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Application Number | Title | Priority Date | Filing Date |
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BRPI0817982A BRPI0817982B1 (pt) | 2007-09-25 | 2008-09-09 | aparelho e método para codificar um sinal de áudio multicanal |
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Country | Link |
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US (3) | US8577045B2 (pt) |
EP (1) | EP2206110B1 (pt) |
JP (1) | JP5277508B2 (pt) |
KR (1) | KR101120913B1 (pt) |
CN (1) | CN101809655B (pt) |
BR (1) | BRPI0817982B1 (pt) |
CA (1) | CA2698600C (pt) |
GB (1) | GB2453117B (pt) |
MX (1) | MX2010002846A (pt) |
MY (1) | MY169423A (pt) |
RU (1) | RU2450369C2 (pt) |
WO (1) | WO2009042386A1 (pt) |
ZA (1) | ZA201001672B (pt) |
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