PARAMETRIC STEREO ENCODING AND DECODING

摘要

A decoder comprises a receiver (601) which receives a parametrically encoded signal comprising a downmix of multiple channels, a set of upmix parameters including a phase parameter, and a phase correction parameter. The phase correction parameter is provided for second parts of the downmix but not for first parts of the downmix. An upmixer (603, 605) generates the multi-channel signal by upmixing the downmix based on the set of upmix parameters and a modifying unit (607) modify the upmixing in response to the phase correction parameter for the second parts of the downmix. The second parts may be associated with scenarios wherein at least two of the encoded multichannel signals are out of phase. The invention may provide improved audio quality for a reduced data rate.