Method and apparatus for signal compression and processing using

Details Method and apparatus for signal compression and processing using Method and apparatus for signal compression and processing using

1996-09-18

1999-08-03

Mai, Tan V.

Boots, shoes, and leggings

3647485, G06F 738

Patent

active

059333600

ABSTRACT:
For most `natural` signals like audio and video, the first derivative with respect to time (or spatially as in video) can have a significant amount of error and still be perceived as accurate due to the masking properties of the ears and eyes. A Logarithmic Differential Compression (LDC) data stream representation of the first derivative is formed with four or less bits of mantissa and can be treated as both a logarithmic numeric representation and a floating point numeric representation without correction. A digital signal processor 524 is described which performs multiplication of LDC data with a simple scalar adder 600 and addition of LDC data with a simple four or less bit floating point adder 610. A digital signal processor is optimized to process LDC data and low cost arrays of these digital signal processors are formed to provide high performance systems for transforms and filtering.

REFERENCES:
patent: 4583180 (1986-04-01), Kmetz
patent: 4720809 (1988-01-01), Taylor
patent: 5365465 (1994-11-01), Larson

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