Multi-rate transcoder for digital streams

Details Multi-rate transcoder for digital streams Multi-rate transcoder for digital streams

H - Electricity

04

N

H04N 7/26 (2006.01) H04N 7/24 (2006.01)

Patent

CA 2445113

Methods and apparatus are provided to produce a plurality of different rate output bitstreams from a common input bit stream. Overhead data (30) is extracted from the input bit stream. The input bit stream is partially decoded (62). Thereafter, the at least partially decoded bit stream is re-encoded at different rates (64A, 64B... 64N), to produce multiple re-encoded bit streams (STREAM 1, STREAM 2... STREAM N) having different rates. The overhead data (30) is combined (60) with each re-encoded bit stream, thereby providing multiple versions of said encoded bit stream at different rates.

L'invention concerne des procédés et un dispositif permettant de produire des flots binaires présentant une pluralité de débits différents à partir d'un flot binaire d'entrée commun. Les données (30) supplémentaires sont extraites du flot d'entrée et le flot d'entrée est partiellement décodé (62). Ensuite le flot au moins partiellement décodé est recodé à différentes vitesses (64A, 64B... 64N), de manière à produire des flots binaires recodé multiples (STREAM 1, STREAM 2... STREAM N) présentant des débits différents. Les données (30) supplémentaires sont combinées (60) à chaque flot recodé, ce qui permet d'obtenir des versions multiples dudit flot binaire codé avec des débits différents.

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