Accession Number : ADD004259

Title :   Discrete Cosine Transform Signal Processor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Means,Robert W

Report Date : 18 Nov 1975

Pagination or Media Count : 6

Abstract : A processor for performing a discrete cosine transform of an input signal, suitable for real-time television image processing, specifically for obtaining an acceptable picture when the number of bits of information available for describing the picture and/or the channel bandwidth are severely limited, comprising: two complex read-only memories, and input and output read-only memory, each containing a predetermined number of data points arranged in a predetermined manner, two complex multipliers, an input and an output multiplier, each having an input from one of the read-only memories, and input which is connectable to the external signal of N data values which is to be transformed discretely and cosinuscidally; a complex transversal filter, having 2N-1 taps, the input to the filter being the output of the input multiplier; the output of the transform processor comprising the output of the output multiplier. (Author)

Descriptors :   *Patents, *Signal processing, *Processing equipment, Sine waves, Fourier transformation, Image processing, Real time, Television systems, Discrete distribution

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE