Video scramble/descramble apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsShinichiro Koto, Tadaaki Masuda
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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.
Claims6
A video processing apparatus for an input video signal, comprising:
- a random number generator to generate scramble key information concerning a previous video picture and used for descramble;
- a watermark generator to generate a watermark signal including the scramble key information concerning the previous video picture;
- a multiplexer to multiplex the watermark signal on the input video signal to generate a multiplexed signal including the scramble key information;
- an encoder to encode the multiplexed signal to output encoded video data including the scramble key information;
- and
- a scrambler to scramble the encoded video data to output scrambled video data including the scramble key information to be used for descramble.
A video processing apparatus for an input video signal, comprising:
- means for generating scramble key information concerning a previous video picture and used for descramble;
- means for generating a watermark signal including the scramble key information concerning the previous video picture;
- means for multiplexing the watermark signal on the input video signal to generate a multiplexed signal including the scramble key information;
- means for encoding the multiplexed signal to output encoded video data including the scramble key information;
- and
- means for scrambling the encoded video data to output scrambled video data including the scramble key information to be used for descramble.
A video processing method for an input video signal, comprising:
- generating scramble key information concerning a previous video picture and used for descramble;
- generating a watermark signal including the scramble key information concerning the previous video picture;
- multiplexing the watermark signal on the input video signal to generate a multiplexed signal including the scramble key information;
- encoding the multiplexed signal to output encoded video data including the scramble key information;
- and
- scrambling the encoded video data to generate scrambled video data including the scramble key information to be used for descramble.
Dependencies are inferred from the claim text.