Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1991-09-10
1993-01-19
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358314, 358312, 360 103, 360 191, 360 381, H04N 5783
Patent
active
051811251
ABSTRACT:
An apparatus for reproducing video signals recorded in slant tracks on a magnetic tape also having respective pulse code modulated audio signals recorded in extensions of the slant tracks with gaps therebetween: comprises a rotary head drum having magnetic heads mounted thereon with an angular spacing of 180 degrees therebetween for scanning the slant tracks and extensions thereof and thereby providing reproduced head outputs containing video and audio signals reproduced from the magnetic tape with dropouts in said reproduced head outputs corresponding to the gaps between the respective recorded video and audio signals; and a signal extracting circuit including a head changeover switch receiving the reproduced head outputs and responsive to a head switching signal synchronized with rotation of the head drum to provide a switched output which, in a normal reproducing mode employing a tape speed equal to that for recording, consists of the reproduced video signals and, in another reproducing mode employing a different tape speed, also includes the dropouts and noises corresponding to at least portions of the reproduced audio signals. Dropouts in the switched output are detected to provide dropout detected pulses, and the switched output is muted in response to muting signals each initiated by a respecitve dropout detected pulse and continuing for a period corresponding to the duration of the respective dropout and the following noise so as to eliminate from the switched output in the other reproducing mode noises due to audio signals that may be contained therein.
REFERENCES:
patent: 4403262 (1983-09-01), Ito et al.
patent: 4559567 (1985-12-01), Maruichi et al.
patent: 4651230 (1987-03-01), Hagita et al.
Chin Tommy P.
Frommer William S.
Nguyen Huy
Sinderbrand Alvin
Sony Corporation
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