Audio signal encoding apparatus encodes difference signal related to difference between signals output from decoder and selector, based on preset encoding scheme, and outputs extension encoded signal to multiplexer

摘要

#CMT# #/CMT# A selector selectively outputs an audio signal input into core encoder or audio signal output from a sound field effect processor which adds e.g. a binaural effect. An extension encoder encodes a difference signal related to the difference between signals output from decoder and selector, according to a preset encoding scheme and to output extension encoded signal. A multiplexer multiplexes the encoded audio signal and extension encoded signal into a composite encoded signal. #CMT# : #/CMT# Independent claims are also included for the following: (1) an audio signal decoding apparatus; (2) an audio signal encoding and decoding apparatus; and (3) an audio signal encoding method. #CMT#USE : #/CMT# Audio signal encoding apparatus including Dolby AC3 encoder, MPEG audio encoder, digital theater system (DTS) encoder. #CMT#ADVANTAGE : #/CMT# Capable of transmitting audio signal along with sound field effect processed audio signal. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows a block diagram of the audio signal encoding apparatus.