Appeal No. 1998-2264
Application No. 08/439,793
The invention is related to a device for permitting
direct viewing of copy protected video signals without
stripping the signals of their copy protection, so that the
signals can be viewed without distortion but not recorded.
Copy protection is usually in the form of additions to the
video signal which cause the signal to distort upon passage
through the automatic gain control of the video recorder. As
a result, the copy protected signal can neither be recorded
nor directly viewed. The invention permits viewing of the
copy protected signals by including a by-pass of the automatic
gain control (AGC) circuit which routes an input signal
directly to the television signal processing circuit. The
invention is further illustrated by the following claim below.
7. An external input signal processing circuit for a
television receiver with a video tape recorder, the video tape
recorder having recording and reproducing functions, said
external input signal processing circuit comprising:
an automatic gain control circuit having an input
terminal connected to an external input terminal of the video
tape recorder and an output terminal connected to a video
signal recording circuit for recording a video signal on a
recording medium;
a video signal reproducing circuit for reproducing a
video signal recorded on said recording medium;
an internal/external viewing changeover switch having one
input terminal connected to receive a video signal from said
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