Digital speech communication system

Details Digital speech communication system Digital speech communication system

H - Electricity

04

B

354/47

H04B 1/66 (2006.01)

Patent

CA 1076703

DIGITAL SPEECH COMMUNICATION SYSTEM Abstract of the Disclosure A digital speech communication arrangement includes apparatus for partitioning a speech signal into a plurality of nonuniformly related, preassigned intelligibility contributing subbands. Each subband portion is digitally encoded after sampling at a rate related to the bandwidth of the subband. The digital codes of the subband are combined and applied to a common communication channel. A replica of each subband is formed by separating the digital codes, producing a sampled form of each digital coded signal and selecting the subband of the speech signal from said sampled form. The subbands are combined to reconstruct the speech signal. Other features include: aliasing for efficient frequency transposition.

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