Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1987-03-25
1988-12-06
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
375122, G10L 500
Patent
active
047900156
ABSTRACT:
This coder dispatches the bits resulting from the coding operation of a speech signal into a format for transmission at a rate chosen from a plurality of predetermined transmission rates. More specifically, the contents of at least part of the speech signal frequency bandwidth is split into several sub-bands. Said sub-bands are regrouped into sub-groups, each of said sub-groups corresponding to at least one of said possible transmission rates, i.e. to at least one sub-group coding bit rate. The signal samples belonging to each sub-group are recoded through a dynamical allocation of requantizing steps between the sub-bands. The obtained bits resulting from the recoding are dispatched into a multirate frame according to the sub-group which they belong to.
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Callens Paul
Galand Claude
Frisone John B.
International Business Machines - Corporation
Kemeny Emanuel S.
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