Bit compression multiplexing

Details Bit compression multiplexing Bit compression multiplexing

H - Electricity

04

J

363/15

H04J 3/02 (2006.01) H04J 3/16 (2006.01)

Patent

CA 1203031

- 14 - BIT COMPRESSION MULTIPLEXING Abstract A bit compression multiplexer for a pair of time division multiplexed digital bit streams each one of which includes a plurality of PCM encoded signals deposited in separate and distinct channels of a repetitive frame and signaling bits multiplexed therewith. The PCM encoded signals of successive frames are normally bit compressed into n-bit signals, but periodically the encoded signals of selected frames are bit compressed into (n-1)-bit signals. The bit compressed signals of the pair of bit streams are time division multiplexed with each other, with the multiplexed compressed signals occupying separate and distinct channels of a repetitive frame. The signaling bits are extracted from the pair of digital bit streams and are inserted into predetermined (n-1)-bit channels of the last-recited repetitive frame. The signaling bits that are placed in a given channel are related to the encoded message signal of that channel.

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