Patent ID: 8332229

Claim:
A method for MPEG Surround spatial audio encoding of coincident surround sound recordings, the method comprising: conducting time-frequency subband analysis filtering of time-domain coincident microphone array signals producing a plurality of subband-domain coincident microphone array signals; determining microphone signal energy and cross-correlation parameters for each of a plurality of MPEG Surround parameter bands, said bands associated with each of the plurality of subband-domain coincident microphone array signals, forming a plurality of parameter band values; determining required spatial parameters based on the plurality of parameter band values and a plurality of subband-domain coincident-to-surround channel coefficients, said subband-domain coincident-to-surround channel coefficients being in a matrix that maps the subband-domain coincident microphone array signals to subband-domain multi-channel surround signals; and downmixing the plurality of subband-domain coincident-to-surround channel coefficients through a spatial encoding tree to derive a plurality of output-downmix channel coefficients.