Patent ID: 8488819
Filing Date: 2013-07-16
Classification: G10L,H04S

Abstract:
1. A method of processing a signal, comprising: receiving, by an audio decoding apparatus, a downmix signal and spatial information, wherein the downmix signal corresponding to one of a mono signal and a stereo signal is generated by downmixing a multi-channel audio signal, the spatial information is determined when the multi-channel audio signal is downmixed into the downmix signal, the spatial information includes channel level difference (CLD) and an inter-channel correlation (ICC); generating, by an audio decoding apparatus, sub-rendering information corresponding to each channel of two channels by using HRTF (Head Related Transfer Function), the CLD and the ICC; generating, by an audio decoding apparatus, rendering information by using the sub-rendering information; and generating, by an audio decoding apparatus, a surround signal having the surround effect by applying the rendering information to the downmix signal, wherein: the surround signal having the surround effect consists of two output channels, and provides multi-channel impression corresponding to the multi-channel audio signal over two output channels, wherein the generating the sub-rendering information generates the sub-rendering information by using a first coefficient calculated based on an equation (10