Method, medium, and system encoding/decoding a multi-channel audio signal, and method medium, and system decoding a down-mixed signal to a 2-channel signal

摘要

A method, medium, and system encoding and/or decoding a multi-channel audio signal, and a method, medium, and system decoding a signal down-mixed from multi-channels to a 2-channel signal. The method of encoding an audio signal may include generating spatial cues indicating directivity information of a virtual sound source generated by at least two channel sound sources among a plurality of channels, and down-mixing the plurality of channel signals. The method of decoding an audio signal may include receiving inputs of spatial cues indicating directivity information of a virtual sound source generated by at least two channel sound sources among sound sources of a plurality of channels, and a signal down-mixed from the plurality of channel signals, and restoring the down-mixed signal to a plurality of channel signals by using the spatial cues. According to such systems, media, and methods, a multi-channel audio signal can be accurately encoded and/or decoded regardless of frequency bands.

主权项

1. A method of decoding a plurality of channel signals, comprising:
receiving a mono signal obtained from down-mixing the plurality of channel signals; obtaining spatial cues, the spatial cues being generated based on an enemy of each sound source corresponding to the plurality of channel signals and an enemy of each virtual sound source generated by an encoder during the down-mixing of the plurality of channel signals; and restoring the mono signal to the plurality of channel signals by using the spatial cues.