Patent ID: 7702407
Filing Date: 2010-04-20
Classification: G10L

Abstract:
1. A method for decoding an encoded audio signal performed by an audio decoding apparatus, comprising: receiving, in the audio decoding apparatus, a downmix signal, fixed channel configuration information indicating a predetermined tree configuration and arbitrary channel configuration information including a type identifier comprising an arbitrary tree configuration, wherein the type identifier includes one of a division identifier and a non-division identifier, the division identifier indicating a channel division at a node of a layer and the non-division identifier indicating no channel division at a node of a layer; generating, in the audio decoding apparatus, fixed output channels using the fixed channel configuration information and the downmix signal; and generating, in the audio decoding apparatus, at least one arbitrary output channel using the arbitrary channel configuration information and the fixed output channels such that each arbitrary channel is generated from only one fixed channel comprising: wherein a number of the fixed output channels is greater than a number of channels of the downmix signal, and wherein a number of output channels of the decoded audio signal including the at least one arbitrary output channel is greater than the number of the fixed output channels.