Audio compression

H - Electricity – 04 – B

Patent

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Details

H04B 1/66 (2006.01) H04H 1/00 (2006.01)

Patent

CA 2278576

An auxiliary data signal is derived from a received compression encoded audio signal during decoding of the signal and communicated with the decoded audio signal for use in re-encoding the signal. The auxiliary data signal may be communicated integrally with the audio signal, for example in the least significant bits, or may follow a different path. The provision of the auxiliary data signal may enable more transparent decoding and re-coding processes to take place, by allowing the coding decision to match the coding decisions originally used; this can alleviate problems with quality reduction arising from cascaded decoding and re-coding processes.

Un signal de transmission de données auxiliaire est dérivé d'un signal audio codé par compression reçu, avant d'être décodé par compression. Ce signal de transmission de données auxiliaire est transmis avec le signal audio décodé afin que ce dernier soit à nouveau codé. Le signal de transmission de données auxiliaire peut être transmis intégralement avec le signal audio, par exemple dans les bits de plus faible poids, ou peut suivre un chemin différent. Ce signal de transmission de données auxiliaire permet de prendre des décisions relatives au codage cohérentes par rapport aux décisions prises à l'origine, et ainsi de mettre en oeuvre des procédés de décodage et de recodage plus transparents, ce qui simplifie les problèmes de réduction de la qualité pouvant découler d'une succession de processus de décodage et de recodage.

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