Abstract: An encoding/decoding apparatus and method for controlling a channel signal is disclosed, wherein the encoding apparatus may include an encoder to encode an object signal, a channel signal, and rendering information for the channel signal, and a bit stream generator to generate, as a bit stream, the encoded object signal, the encoded channel signal, and the encoded rendering information for the channel signal.

Abstract: An audio coding and decoding apparatus is disclosed. The audio coding apparatus may include an audio signal encoding unit to encode an audio signal; and a bitstream transmission unit to convert the audio signal into a bitstream and transmit the bitstream, wherein the audio signal comprises a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal.

Abstract: An encoding apparatus and a decoding apparatus supporting a scalable multichannel audio signal, and methods performed by the apparatuses art provided. When compressing and decompressing a multichannel audio signal to compress and reproduce high quality 3-dimensional (3D) audio, the apparatuses and the methods in integrated form of (1) a sound quality scalability function for providing various qualities of audio adaptively to a transmission environment, terminal performance, and a listening environment (2) a channel scalability function for providing multichannel signals of various formats adaptively to the transmission environment, the terminal performance, and a reproduction environment of a terminal, such as speaker arrangement, and (3) an object scalability function for independently controlling a particular audio object to maximize a 3D sound field effect.