Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1979-11-09
1982-01-19
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
358261, H03K 1324
Patent
active
043119891
ABSTRACT:
A converter for converting input binary words into respective code binary words according to a given transcoding law, and application of the converter to reduced redundancy image transmission systems (e.g. facsimile systems). A main counter (3) is connected via an AND gate (5) to receive fast clock pulses from a fast clock (4). The main counter is capable of counting through all possible code words, and its count state is applied via parallel connections to a transcoder circuit (6) which obeys the inverse transcoding law to the given law i.e. it acts as a decoder of code words. First code words for encoding are applied in parallel from at an input (1) and are compared by a comparator (7) with the decoded versions of the count states as given by the transcoder (6). On identity the counting is stopped by means of the AND gate (5) and the count state that gave rise to the identity is stored in a buffer register (8) for application to outputs (2).
REFERENCES:
patent: 3016422 (1962-01-01), Lee
patent: 3748379 (1973-07-01), Epstein
patent: 4037226 (1977-07-01), Betts
patent: 4092675 (1978-05-01), Saran
Janus, "IBM Technical Disclosure Bulletin", vol. 14, No. 1, Jun. 1971, p. 303.
Compagnie Industrielle des Telecommunications Cit-Alcatel
Miller Charles D.
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