EXEDNDED HIGH RESOLUTION AUDIO SIGNAL ENCODER AND DECODER THEREOF

摘要

An audio signal encoding and decoding apparatus capable of transmitting an audio signal or an audio signal together with a sound-field-effect-processed audio signal are provided. The audio signal encoding apparatus includes a core encoder to encode an input audio signal according to an audio signal encoding standard, a core decoder to decode the encoded audio signal output from the core encoder, a sound-field-effect processor to perform a sound-field-effect process on the input audio signal, a selector to selectively output the input audio signal or the sound-field-effect-processed audio signal output from the sound-field-effect processor, a subtraction unit to calculate a difference signal between the signals output from the core decoder and the selector, an extension encoder to encode the difference signal output from the subtraction unit according to an arbitrary encoding scheme and to output the extension encoded signal, and a multiplexer to multiplex the encoded audio signal output from the core encoder and the extension encoded signal output from the extension encoder into a composite encoded signal and to output the composite encoded signal.