Pulse or digital communications – Repeaters – Testing
Patent
1979-11-15
1982-11-30
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
332 11D, 364724, H03K 1322
Patent
active
043618936
ABSTRACT:
This system comprises an encoder in which the differential PCM signal to be transmitted is formed as the difference between the incoming linear PCM signal and a prediction signal produced by a prediction filter comprising a local decoder receiving the said differential PCM signal. According to the invention the local decoder and the remote decoder are constructed in an identical manner by means of one or several filtering sections arranged in cascade, each filtering section being of the purely recursive or non-recursive type with one sole coefficient differing from zero and having been provided with its own roundoff (or truncation) device having a step size equal to the quantizing step of the differential PCM signal, the incoming linear PCM signal being rounded (or truncated) in the same manner. This construction enables the cascade arrangement of encoders and decoders without any further degradation of the signal then the degradation produced by the first coding.
REFERENCES:
patent: 3502986 (1970-03-01), Lucky
patent: 3689840 (1972-09-01), Brown
patent: 3973199 (1976-08-01), Widmer
Briody Thomas A.
Chin Stephen
Goodman Edward W.
Safourek Benedict V.
Streeter William J.
LandOfFree
Transmission system using differential pulse code modulation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmission system using differential pulse code modulation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission system using differential pulse code modulation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-198421