Expanded partial response processing for analog signal...

Details Expanded partial response processing for analog signal... Expanded partial response processing for analog signal...

H - Electricity

04

K

379/1, 325/3

H04K 1/02 (2006.01) H04L 25/03 (2006.01) H04L 25/497 (2006.01)

Patent

CA 1252237

- 33 - EXPANDED PARTIAL RESPONSE PROCESSING FOR ANALOG SIGNAL ENCIPHERING AND THE LIKE Abstract Partial response signal processing is applied to samples of an analog signal quantized in an amplitude range having a sufficient number of levels that a sample amplitude error of a small percentage of the total levels of the range is not readily perceptible to the human auditory function and that it exhibits tolerable quantizing noise. Samples received into the processing in a transmitting station are sample masked for privacy enciphering. Complementary processing is employed for a receiving station.

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