System, medium and method of encoding/decoding multi-channel audio signals

摘要

An system, method, and method of encoding/decoding a multi-channel audio signal, including a decoding level generation unit producing decoding-level information that helps a bitstream including a number of audio channel signals and space information to be decoded into a number of audio channel signals, wherein the space information includes information about magnitude differences and/or similarities between channels, and an audio decoder decoding the bitstream according to the decoding-level information. Accordingly, even a single input bitstream can be decoded into a suitable number of channels depending on the type of a speaker configuration used. Scalable channel decoding can be achieved by partially decoding an input bitstream. In the scalable channel decoding, a decoder may set decoding levels and outputs audio channel signals according to the decoding levels, thereby reducing decoding complexity.

主权项

1. A multi-channel audio signal decoding system, comprising:
a two-to-three decoder to decode two audio channel signals and using TTT spatial information into first, second, and third channel signals; a first one-to-two (OTT) decoder to decode the first channel signal using first OTT spatial information into first plural channel signals; a second OTT decoder to decode the second channel signal using second OTT spatial information into second plural channel signals; a third OTT decoder to decode the third channel signal using third OTT spatial information into third plural channel signals; a fourth OTT decoder to decode one of the first plural channel signals output by the first OTT decoder using fourth OTT spatial information into fourth plural channel signals; and a fifth OTT decoder to decode one of the second plural channel signals output by the second OTT decoder using fifth OTT spatial information into fifth plural channel signals, wherein all of the decoders are arranged by a tree-structure.