Allan G Weber

US Patent:

41964489, Apr 1, 1980

Filed:

May 15, 1978

Appl. No.:

5/905902

Inventors:

Harper J. Whitehouse - San Diego CA
Robert W. Means - Lausanne, CH
Edwin H. Wrench - San Diego CA
Jeffrey M. Speiser - San Diego CA
Allan G. Weber - Los Angeles CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H04N 712

US Classification:

358135

Abstract:

An image-compression system, wherein the image consists of a planar array of data points having various brightness levels, comprises a transmitter and a receiver. The transmitter comprises an analog-digital converter, for converting input analog data into digital data. The cosine transform is taken of the incoming digital data to transform the data representing various brightness levels into the frequency domain. The various frequency data points are differentially pulse code modulated, thereby removing line-to-line redundancy, the output data being in parallel form. Timing circuitry is provided for controlling the timing of the various circuits. Circuitry is provided in a receiver for the modulating or decoding of the output signal of the transmitter.