encoder to encode and decoder to decode audio objects, teleconferencing center, transmitter to transmit and receiver to receive audio signals, communication system to communicate audio signals, methods to encode, decode, transmit and to receive audio signals audio, computer program product, and audio playback device

摘要

encoder to encode and decoder to decode audio objects, teleconferencing center, transmitter to transmit and receiver to receive audio signals, communication system to communicate audio signals, methods to encode, decode, transmit and to receive audio signals audio, computer program product, and audio playback device an audio system comprises an encoder (209) that encodes audio objects in an encoding unit (403) that generates a downmixed audio signal and data parameters representing the plurality of audio objects. the down-mix audio signal and parametric data is transmitted to a decoder (215) comprising a decoding unit (301) that generates approximate replicas of the audio objects and a rendering unit (303) that generates a output of audio objects. The decoder 215 further contains a processor 501 for generating encoding modification data which is sent to the encoder 209. encoder 209 then modifies the encoding of audio objects, and in particular modifies parametric data in response to encoding modification data. The approach allows manipulation of the audio objects to be controlled by the decoder (215) but made totally or partially by the encoder (209). therefore, manipulation can be performed on independent effective audio objects rather than on approximate replicas and thereby provide improved performance.