Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1997-03-04
1999-10-12
Tran, Thai
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386 33, 386 95, 386111, H04N 592, H04N 576
Patent
active
059664940
ABSTRACT:
Digital video tape recorder which includes a color framing sequence as part of a recorded control signal during standard recording, and which maintains synchronous color framing and/or continuous groups of pictures in two different editing modes in which a newly-suppled video signal is recorded on a magnetic tape already having stored thereon a previously recorded video signal. In a normal recording mode, a color framing signal indicating the occurrence of a newly supplied picture is detected in a supplied video signal. A video control signal that includes the detected color framing signal is generated and is recorded in a control track of the magnetic tape and the video signal is recorded in synchronization with the detected color framing signal in successive oblique tracks on the magnetic tape. In the first one of the editing modes, the traveling speed of the record medium is established so that the phase of the detected color framing signal and the phase of the generated reproduced color framing signal coincide thus maintaining synchronous color framing between the previously recorded and newly recorded video signals. In a second one of the editing modes, the group of pictures signal is inverted when the detected color framing signal and the reproduced color framing signal are out of phase by a pre-set amount this maintaining continuous groups of pictures between the previously recorded and newly recorded video signals.
REFERENCES:
patent: 5642174 (1997-06-01), Kazui et al.
patent: 5822024 (1998-10-01), Setogawa et al.
patent: 5841935 (1998-11-01), Asai et al.
Frommer William S.
Sony Corporation
Tran Thai
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