Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1978-11-15
1980-11-11
Moffitt, James W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 4, H04N 579
Patent
active
042336210
ABSTRACT:
A method and apparatus for recording in successive parallel tracks on a record medium a periodic information signal, such as a video signal having information contained in successive line intervals, a predetermined number of line intervals being included in a field interval and a predetermined number of field intervals being included in a frame interval. Alternate ones of the frame intervals are delayed by a time delay equal to an odd multiple (2n-1) of a line interval. The delayed and undelayed frame intervals are supplied, in sequence, to a recording transducer for recording in successive parallel tracks on the record medium. If the video signal is a SECAM color video signal, then the effect of delaying alternate frame intervals, such as the odd (or even) frame intervals is to align line intervals in adjacent tracks with information representing the same color.
Also disclosed are a method and apparatus for reproducing the periodic information signal which had been recorded in the aforementioned manner. These recorded signals are reproduced from the successive parallel tracks to recover the delayed and undelayed frame intervals alternately. The undelayed frame intervals are delayed, during reproduction, by a time delay equal to the aforesaid odd multiple (2n-1) of a line interval, thereby recovering the periodic information signal which appears in successive frame intervals as being undelayed relative to each other. Thus, if, during recording, the odd frame intervals are delayed, then during reproduction, the even frame intervals are delayed so as to equalize the reproduced odd and even frames.
REFERENCES:
patent: 3852520 (1974-12-01), Bruch
patent: 3939485 (1976-02-01), Amari et al.
patent: 4007482 (1977-02-01), Amari
patent: 4007484 (1977-02-01), Amari
patent: 4012771 (1977-03-01), Ishigaki et al.
patent: 4134126 (1979-01-01), Hirai
Numakura Toshihiko
Yamagiwa Kazuo
Eslinger Lewis H.
McElheny Jr. Donald
Moffitt James W.
Sinderbrand Alvin
Sony Corporation
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