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Title: Data reduction system

Abstract: A data reduction apparatus and method are disclosed in which a serial bit stream, as for example representing characters of a message, can be formatted, registered, transmitted and reconstructed using a number of representative bits reduced from an original conventionally-coded stream to conserve space, transmission time, or bandwidth. More specifically, the original bit stream is treated in segments or data blocks, each consisting of a predetermined number of characters which are defined by a predetermined number of bits. The characters in each data block are arranged or ordered in a pattern for sequential processing in separate sets, according to their frequency of occurrence within the data block. The specific characters used in a block are specified. The positional information of the ordered sets of characters is coded followed by reduced-bit or abbreviated codes that specify the characters of each select group or set. Advantage is taken of developed data to further reduce the need for data bits, as timely termination of the representative format. In this manner, the number of bits developed to carry specific information can be substantially reduced.


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Inventors: Kerner, William R. (Apple Valley, CA, US)
Morton, Jarred (Apple Valley, CA, US)

Application Number: 855484
Filing Date: 1977-11-28
Publication_date: 1980-03-04
Assignee:
Primary Class(es): 341/60 341/107
Other Classes:
US Patent Ref:
3413611Nov, 1968Pfuetze364/900.
3613087Jun, 1975Brown340/172.
3976844Aug, 1976Betz340/172.
4034350Jul, 1977Kashio364/900.

Other Refs:
Primary Examiner: Shaw, Gareth D.
Assistant Examiner: Bartz, C. T.
Attorney: Nilsson, Robbins, Dalgarn, Berliner, Carson & Wurst