P c m signal coding

Details P c m signal coding P c m signal coding

H - Electricity

04

B

363/10

H04B 14/04 (2006.01) H03M 7/00 (2006.01) H04B 10/12 (2006.01) H04B 10/155 (2006.01)

Patent

CA 1293828

ABSTRACT P C M SIGNAL CODING A signal having a non-uniform probability density is processed for transmission in pulse code modulated form. The signal is quantised using conventional methods and the quantised signal then coded using anon-sequential coding scheme in which binary codewords for the quantisation levels are chosen in accordance with the probability of the quantisation levels and number of ON bits in the codeword. Quantisation levels of higher probability are assigned codewords with few ON bits. An optical network embodying the present invention includes a central station 1 having a master clock source 3. The central station 1 is connected to a remote station 2 including signal processing means 6 arranged to process a signal for return transmission to the central station 1 by the method of the present invention.

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