TRANSMITTER

Title:

TRANSMITTER

Document Type and Number:

Japanese Patent JPS58191550

Kind Code:

A

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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Inventors:

POORU KAREN
KUROODO GIYARAN

Application Number:

JP4461283A

Publication Date:

November 08, 1983

Filing Date:

March 18, 1983

Export Citation:

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Assignee:

IBM

International Classes:

H03M7/30; H04B1/66; H04B14/04; H04J3/00; (IPC1-7): H04B1/66; H04B12/02; H04J3/00

Attorney, Agent or Firm:

Koichi Tonmiya

Previous Patent: JPS58191549

Next Patent: TRANSMITTING AND RECEPTION METHOD OF TIME DIVISION SOUND MULTIPLEXING