Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-09-13
1979-04-17
Canney, Vincent P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
360 9, 360 32, 360 19, 358136, H04N 576, H04N 712
Patent
active
041503970
ABSTRACT:
A record and playback system for reducing repetition redundancy is described in which during recording, a partially repetitive signal, such as a television signal, is converted into digital data words each representing the signal occurring during a particular TV line subinterval. A comparator unit receives the data words and compares each received word with a word from a recirculating storage that corresponds to the same line subinterval in its frame as that of the compared received data word. When the compared words differ by a predetermined value, the received word replaces the stored word in the storage and is also stored in a changed data memory as an updated data word along with address words. A recording control circuit intermittently causes the read out of data from the changed data memory for recording at selected positions of a data record. The storage includes alternately operating first and second recirculating storages which each store a set of data words equal in number to the number of data words of one-half a TV frame. Audio data words are stored for recording during vertical blanking intervals of the signal. On playback, a record pickup intermittently reads data words from the record to a record pickup memory whenever this memory is nearly empty. A composite signal generator reconstructs the recorded television signal from data words it receives from the display storage and display control.
REFERENCES:
patent: 2295023 (1942-09-01), Beatty
patent: 3472962 (1969-10-01), Sanford
patent: 3475549 (1969-10-01), Goldmark
patent: 3571505 (1971-03-01), Mounts
patent: 3597759 (1971-08-01), Hause
patent: 3603725 (1971-09-01), Cutler
patent: 3678181 (1972-07-01), Goldmark
patent: 3720780 (1973-03-01), Remy
patent: 3755624 (1973-08-01), Sekimoto
patent: 3758713 (1973-09-01), Sekimoto
patent: 3795763 (1974-03-01), Golding
patent: 3819852 (1974-06-01), Wolf
patent: 3825832 (1974-07-01), Frei
patent: 3891794 (1975-06-01), Russell
patent: 3898378 (1975-08-01), Hinoshita
patent: 3924062 (1975-12-01), Broadbent
patent: 3931510 (1976-01-01), Kmetz
patent: 4016361 (1977-04-01), Pandey
patent: 4051530 (1977-09-01), Kuroda
"A Video Encoding System With Conditional Picture-Element Replenishment" by F. W. Mounte, The Bell System, Technical Journal, Sep. 1969.
Canney Vincent P.
Faber Alan
Jacobs Eli S.
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