Subband coded digital transmission system using some composite s

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

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395 238, 395 212, 395 214, H04H 500, G10L 106

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active

056066180

ABSTRACT:
Reproduction accuracy of, for example a digital stereo audio signal, is improved by transmitting sample data as sub-signals such as frequency subband signals. In one or more subbands, corresponding components such as left and right stereo channels are combined so that only one composite signal is transmitted per subband. An indicator signal is transmitted, indicating which subbands are combined. Scale factor signals for all subbands, and for the relative intensity of the respective subband signals which were combined, may also be transmitted. In the receiver a subband signal is derived for each channel from the composite signal, before synthesis of the full channel signals which will be reproduced.

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