Patent ID: 8577483
Filing Date: 2013-11-05
Classification: G10L

Abstract:
1. A method of decoding an audio signal, comprising: receiving the audio signal including an audio descriptor, a downmix signal and a spatial information signal, the audio descriptor including basic information of an audio codec, the basic information including at least one of a transmission rate of the received audio signal, a number of channels, a sampling frequency, an identifier indicating a currently used codec, the spatial information signal including channel level difference (CLD) indicating an energy difference between channels, inter-channel coherences (ICC) meaning a correlation between channels for a OTT box, and channel configuration information including a division identifier indicating a signal is connected to the OTT box and a non-division identifier indicating a signal is connected to an output channel; generating a multi-channel audio signal from the downmix signal using one or more OTT (One-To-Two) boxes and the channel configuration information; and mapping the multi-channel audio signal to a speaker using speaker mapping information, the speaker mapping information being extracted from the spatial information signal, wherein the downmix signal is generated by downmixing a multi-channel audio signal.