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US 5,311,311 AGranted
Encoder for superimposing encoded character data or command data in the vertical blanking interval for regulating video receiver functions
AssigneeSanyo Electric Co., Ltd.
InventorsMasami Harigai, Hiroyasu Shindou
Life of this patent
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Abstract
An encoder disconnects video data between a video source and a video using device only during 21H in the vertical blanking interval. During 21H, it applies locally generated coded data signals, in a format detectable by conventional data decoding devices, to the video using device. The video source may be a camera or tape playback, and the using device may be a TV set or a video tape recorder.
Claims8
A video signal processing device, comprising:
- means for detecting a specific horizontal interval in a vertical blanking period of a television signal;
- means for encoding a data signal within said specific horizontal interval, said data signal being of a type detectable by a means for decoding;
- said data signal including a control data portion, being effective to control a function of a video receiver;
- means for superimposing said data signal within said specific horizontal interval phase locked to said specific horizontal interval;
- and
- said means for detecting, means for encoding, and means for superimposing being operative during a record mode and a play mode of said device.
3 more elements
A device for controlling a video receiver comprising:
- means for detecting a predetermined horizontal interval in a vertical blanking period of a video signal;
- means for encoding a signal within said predetermined horizontal interval;
- said signal including a control data portion, being effective to control a function of said video receiver;
- means for superimposing said signal to said predetermined horizontal interval;
- said means for superimposing including means for phase-locking said signal to said predetermined horizontal interval;
- said video receiver including means for decoding said signal;
- and
- said means for detecting, means for encoding, and means for superimposing being operative during a record mode and a play mode of said device.
5 more elements
Dependencies are inferred from the claim text.