Apparatus and method for encoding and decoding multichannel signal

摘要

Disclosed is an apparatus for encoding and decoding multi-channel signals. The apparatus for encoding the multi-channel signals may shift a phase of the multi-channel signals based on a characteristic of the multi-channel signals. An encoded bitstream with respect to the multi-channel signals may be generated using a downmix signal and a residual signal extracted from the phase-shifted multi-channel signals.

主权项

1. An encoding apparatus, comprising:
a parameter extractor to extract, from multi-channel signals, a plurality of parameters indicating a relationship between a plurality of channels constituting the multi-channel signals; a phase shifter to shift a phase of the multi-channel signals to produce a phase-shifted multi-channel signal using a phase angle that is calculated for each of the plurality of parameters and the plurality of channels; a signal extractor to extract, from the phase-shifted multi-channel signals and using the plurality of parameters, a downmix signal and a residual signal; and a bitstream generator to generate a bitstream by encoding the downmix signal, the residual signal, and the plurality of parameters.