Delta modulation encoder/decoder method and system

Details Delta modulation encoder/decoder method and system Delta modulation encoder/decoder method and system

1988-03-09

1990-02-27

Shoop Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

To or from differential codes

341 76, 371 54, H03M 732

Patent

active

049050028

ABSTRACT:
A method and a system for compressing a delta modulation coded bit string by logically adding together, in mod 2 fashion, adjacent string bits to generate a transformed bit string which is then runlength encoded to provide a compressed bit string. A second embodiment of the invention uses an alternate bit complementation transform which is based on complementing every alterate bit of the bit string to provide a transformed bit string which is then runlength encoded to provide a compressed bit string. Decoding is accomplished by inversing the encoding methods.

REFERENCES:
patent: 4002981 (1977-01-01), Eggermont
patent: 4005411 (1977-01-01), Morrin
patent: 4136363 (1979-01-01), Saran
patent: 4201958 (1980-04-01), Ahamed
patent: 4656633 (1987-04-01), Todd

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