Pulse or digital communications – Repeaters – Testing
Patent
1987-06-04
1989-02-14
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375122, 381 29, H04B 1306
Patent
active
048051934
ABSTRACT:
A digital communication system for transmission and reception of speech signals and utilizing sampling, filtering and sub-band coding techniques for reduction of the bit rate. The energy levels of each sub-band are determined with respect to the band having the maximum energy level. The energy level information is encoded and divided into protected and unprotected bits. Only the protected bits are used for the determination of the bit allocation of the sample information, but both protected and unprotected bits are utilized in reconstituting the original levels of the bands.
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McLaughlin Michael
Rasky Phillip D.
Boehm Douglas A.
Chin Stephen
Griffin Robert L.
Motorola Inc.
Sarli, Jr. Anthony J.
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