Method and apparatus for copy protecting video content and producing a reduced quality reproduction of video content for personal use
First Claim
1. An apparatus for processing a video signal to produce normal quality video for display on a display device and so as to inhibit the making of high quality reproductions therefrom while allowing lower quality reproductions to be made, the apparatus comprising:
- a first signal modification element which alters the video signal to produce a first modified video signal that is viewable as normal quality video on the display device, and wherein the first modified video signal, if reproduced, produces a video copy of unusable quality; and
a second signal modification element which alters the video signal to produce a second modified video signal of reduced quality that can be reproduced using a reproduction device, wherein the second signal modification element alters the video signal by reducing the quality of the second video signal to a level equivalent to an analog video signal.
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Accused Products
Abstract
A copy protection apparatus is disclosed for processing a video signal to produce normal quality video for display on a display device and so as to inhibit the making of high quality reproductions therefrom while allowing lower quality reproductions to be made. The apparatus includes a first signal modification element that alters a normal quality video signal to produce a first modified signal such that, if reproduced, an unusable video copy is produced, and wherein the first modified video signal, when output to a display device is viewable as normal quality video on the display device. The apparatus further includes a second signal modification element that degrades the video signal to produce a second video signal of reduced quality. This reduced quality signal can be output to a reproduction device for copying.
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Citations
23 Claims
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1. An apparatus for processing a video signal to produce normal quality video for display on a display device and so as to inhibit the making of high quality reproductions therefrom while allowing lower quality reproductions to be made, the apparatus comprising:
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a first signal modification element which alters the video signal to produce a first modified video signal that is viewable as normal quality video on the display device, and wherein the first modified video signal, if reproduced, produces a video copy of unusable quality; and a second signal modification element which alters the video signal to produce a second modified video signal of reduced quality that can be reproduced using a reproduction device, wherein the second signal modification element alters the video signal by reducing the quality of the second video signal to a level equivalent to an analog video signal.
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2. An apparatus for processing a video signal to produce normal quality video for display on a display device and so as to inhibit the making of high quality reproductions therefrom while allowing lower quality reproductions to be made, the apparatus comprising:
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a first signal modification element which alters the video signal to produce a first modified video signal that is viewable as normal quality video on the display device, and wherein the first modified video signal, if reproduced, produces a video copy of unusable quality; and a second signal modification element which alters the video signal to produce a second modified video signal of reduced quality that can be reproduced using a reproduction device, wherein the second signal modification element alters the video signal by reducing the quality of the second video signal to a level equivalent to a broadcast quality video signal.
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3. An apparatus for processing a video signal to produce normal quality video for display on a display device and so as to inhibit the making of high quality reproductions therefrom while allowing lower quality reproductions to be made, the apparatus comprising:
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a first signal modification element which alters the video signal to produce a first modified video signal that is viewable as normal quality video on the display device, and wherein the first modified video signal, if reproduced, produces a video copy of unusable quality; and a second signal modification element which alters the video signal to produce a second modified video signal of reduced quality that can be reproduced using a reproduction device, wherein the second signal modification element alters the video signal by reducing the quality of the second video signal to a level equivalent to that achievable using a standard VCR tape in six-hour mode.
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4. An apparatus for processing a video signal to produce normal quality video for display on a display device and so as to inhibit the making of high quality reproductions therefrom while allowing lower quality reproductions to be made, the apparatus comprising:
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a first signal modification element which alters the video signal to produce a first modified video signal that is viewable as normal quality video on the display device, and wherein the first modified video signal, if reproduced, produces a video copy of unusable quality; and a second signal modification element which alters the video signal to produce a second modified video signal of reduced quality that can be reproduced using a reproduction device, wherein the second signal modification element alters the video signal by using fewer data bits to encode pixel information to produce the second modified video signal. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for processing a video signal so as to inhibit the making of high quality videotape recordings therefrom while producing a normal picture on a display device, the apparatus comprising:
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a video decoder for decoding a video signal to provide a clean video signal; a first signal modification element which alters the clean video signal to produce a first modified video signal which is of unusable quality when output for reproduction thereby inhibiting the making of usable copies therefrom, and wherein the first modified video signal is viewable as high quality video when displayed on a display device; and a second signal modification element which alters the clean video signal such that a reduced quality version of the content is produced and output for reproduction, wherein the second signal modification element includes a signal quality reducing means for altering the clean video signal to produce a signal having reduced signal quality. - View Dependent Claims (14, 15, 16)
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17. A method for processing a video signal so that it produces a normal quality picture on a display device but produces a reduced quality copy when reproduced using a reproduction device, the method comprising:
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providing a clean video signal, wherein providing a clean video signal includes receiving an encoded video signal and decoding the encoded video signal to produce the clean video signal; first modifying of the clean video signal to produce a first modified signal that is of unusable quality when output for reproduction and is viewable as high quality video when output to a display device; and second modifying of the clean video signal to produce a degraded second modified signal having reduced signal quality when output for reproduction. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification