Video scramble/descramble apparatus
First Claim
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1. A video processing apparatus for an input video signal, comprising:
- a random number generator to generate scramble key information;
a watermark generator to generate a watermark signal including the scramble key information concerning a previous video picture;
a multiplexer to multiplex the watermark signal on the input video signal to generate a multiplexed signal;
an encoder to encode the multiplexed signal to output encoded video data; and
a scrambler to scramble the encoded video data to generate scrambled video data.
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Abstract
A video scramble apparatus has a scrambler for scrambling an input video signal, and a video encoder for performing interframe predictive coding of the video signal after scrambling, and the scrambler selects a frame, which is not used as a reference frame for interframe prediction in the video encoder, from the input video signal, and scrambles the frame by pixel replacing in units of slices within a predetermined vertical range or pixel replacing in units of n consecutive macroblocks within a predetermined horizontal range.
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Citations
6 Claims
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1. A video processing apparatus for an input video signal, comprising:
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a random number generator to generate scramble key information;
a watermark generator to generate a watermark signal including the scramble key information concerning a previous video picture;
a multiplexer to multiplex the watermark signal on the input video signal to generate a multiplexed signal;
an encoder to encode the multiplexed signal to output encoded video data; and
a scrambler to scramble the encoded video data to generate scrambled video data. - View Dependent Claims (2)
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3. A video processing apparatus for an input video signal, comprising:
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means for generating scramble key information;
means for generating a watermark signal including the scramble key information concerning a previous video picture;
means for multiplexing the watermark signal on the input video signal to generate a multiplexed signal;
means for encoding the multiplexed signal to output encoded video data; and
means for scrambling the encoded video data to generate scrambled video data. - View Dependent Claims (4)
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5. A video processing method for an input video signal, comprising:
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generating scramble key information;
generating a watermark signal including the scramble key information concerning a previous video picture;
multiplexing the watermark signal on the input video signal to generate a multiplexed signal;
encoding the multiplexed signal to output encoded video data; and
scrambling the encoded video data to generate scrambled video data. - View Dependent Claims (6)
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Specification