A METHOD FOR PROCESSING AN AUDIO SIGNAL AND AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL

摘要

PURPOSE: A method and an apparatus for processing an audio signal are provided to up-mix a multi-channel object by a multi-channel signal by obtaining spatial information corresponding to the multi-channel object if a multi-channel object down-mixed by mono or stereo is included in a down-mix signal. CONSTITUTION: A down-mix signal including at least one normal object signal is received(S110). A bit stream including object information determined when the down-mix signal is generated is received. An extended type identifier is extracted from an extended part of the bit stream. The down mix signal includes a multi-channel object signal. If the extended type identifier is instructed, the first spatial information is extracted from the bit stream(S130).