Global masking thresholding for use in perceptual coding

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo

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395 235, 395 236, H04H 500, G10L 302

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057177643

ABSTRACT:
A five-channel perceptual audio compression system which encodes five matrixed channels switches among a fourteen encoding modes each utilizing a respective different set of matrixed channels. Six of the modes are for encoding the three front channels and eight of the modes are for encoding the two back channels. The rate of perceptual encoding the matrixed channels is controlled by adjusting individual noise thresholds as a function of a global masking threshold.

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