Apparatus and method for encoding a multi-channel audio signals using principal component analysis

摘要

Relates to a system for encoding a multi-channel audio signal component analysis by (PCA), one of the audio signal at least the present invention, a plurality of frequency subbands (l (b ₁ (L, R) and two channels subdividing ..., l (b _N), r (b _1), ..., r in (b _N)),), at least one transformation parameter based on at least a portion of the frequency subbands of the plurality of Calculate the ((b _N) (b _1), ..., θ θ), the transformation parameters of one ₁ (θ (b 1), ..., θ (b _N)) sub-frequency of the plurality based on at least of the band at least converted into frequency sub-components including a plurality ((b _N) CP (b _1), ..., CP) main frequency sub-component part, the main frequency sub-component (CP (b _1), ... to form a main component (CP) by combining at least a portion of CP (b _N)), represents (C _1, and C _M), ... of the multi-channel audio signal, the main component including the step of defining (SC) encoded audio signal including a single transformation parameter ₁ ((b _N) θ (b 1), ..., θ) and at least (CP).