Patent ID: 7613306
Filing Date: 2009-11-03
Classification: G10L

Abstract:
1. An audio decoder which decodes a coded signal, said decoder comprising: an obtaining unit operable to obtain coded signals including a) a first coded signal obtained by coding a two-channel stereo signal downmixed from a multi-channel signal exceeding two channels, b) a second coded signal obtained by coding information for generating a multi-channel signal from the stereo signal, and c) a signal representing a code size of the second coded signal; and a decoding unit configured to decode the obtained coded signals, and to output a stereo signal. wherein said decoding unit includes: a first coded signal readout unit configured to read the first coded signal out of the obtained coded signals; a code size readout unit configured to read a signal representing a code size of the second coded signal out of the coded signals; and a first decoding unit configured to decode the first coded signal read out by said first coded signal readout unit, and to output the stereo signal, Wherein said code size readout unit is also configured to remove or skip the second coded signal based on the code size read out by said code size readout unit.