Method and apparatus for modifying a video signal to inhibit una

Details Method and apparatus for modifying a video signal to inhibit una Method and apparatus for modifying a video signal to inhibit una

1993-09-20

1996-12-17

Tran, Thai Q.

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

360 60, 386 94, H04N 979, G11B 1504, G11B 1904

Patent

active

055859291

ABSTRACT:
A standard video signal is modified such that the modified video can be displayed in a normal fashion on a standard monitor device, yet copies made of the modified video signal by videotape recorders will reproduce a video signal containing disturbances which cause a generally unviewable display on a standard television or other video monitor device. The video signal is converted from a standard frame rate to a predetermined, non-standard frame rate video signal utilizing a videotape recorder modified to record at a non-standard speed. A burst interfering signal also can be added. A method of permitting a normal picture to be displayed from the modified video signal includes adding delay devices to a VCR or video monitor to respond to the non-standard frame rate and filtering or replacing the burst interfering signal.

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