Matrixing enables multichannel audio to be made two-channel compatible. If bit-rate reduction based upon psychoacoustic models is applied to the two-channel down mix, unmasking of the quantization noise may result after dematrixing. The general principle to solve this problem is presented. It is shown how minimum bit rates are obtained by dynamic switching between the possible matrix equations. The necessary refinements to enable such dynamic switching are presented.
Author:
ten Kate, Warner R.
Affiliation:
Philips Research Laboratories, Eindhoven, The Netherlands
AES Convention:
96 (February 1994)
Paper Number:
3792
Publication Date:
February 1, 1994
Subject:
Bit Rate Reduction Schemes
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