Slice mask and moat pattern partial encryption
First Claim
1. A method of partially dual encrypting a digital video signal, comprising:
- examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets carrying data representing a pattern of horizontal stripes across an image;
encrypting the packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets;
encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and
replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal.
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Abstract
A selective encryption encoder consistent with certain embodiments of the invention has vertical and/or horizontal stripes encrypted. In one embodiment, packets are examined in the digital video signal to identify a specified packet type, the specified packet type being both packets carrying intra-coded data representing a pattern of horizontal stripes across an image and packets carrying intra-coded data representing a pattern of vertical stripes across an image. The packets identified as being of the specified packet type are encrypted using a first encryption method to produce first encrypted packets. These first encrypted packets are then used to replace the unencrypted packets in the digital video signal to produce a partially encrypted video signal. The packets of the specified type can also be multiple encrypted and replaced in the data stream to produce a multiple encrypted video data stream. This abstract is not to be considered limiting since embodiments consistent with the present invention may incorporate more, fewer or differing elements than mentioned in this abstract.
219 Citations
46 Claims
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1. A method of partially dual encrypting a digital video signal, comprising:
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examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets carrying data representing a pattern of horizontal stripes across an image; encrypting the packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of multiple partially encrypting a digital video signal, comprising:
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examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets carrying data representing a pattern of horizontal stripes across an image; encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and replacing the unencrypted packets of the specified packet type with both the first encrypted packets and the second encrypted packets in the digital video signal to produce a multiple partially encrypted video signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method of partially encrypting a digital video signal, comprising:
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examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets containing slice headers for slices representing a pattern of horizontal stripes across an image; encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially encrypted video signal. - View Dependent Claims (33)
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34. A method of partially dual encrypting a digital video signal, comprising:
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examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising packets carrying data representing a pattern of vertical stripes across an image; encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal. - View Dependent Claims (35, 36, 37, 38)
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39. A method of partially dual encrypting a digital video signal, comprising:
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examining unencrypted packets of data in the digital video signal to identify a specified packet type, the specified packet type comprising both packets carrying data representing a pattern of horizontal stripes across an image and packets carrying data representing a pattern of vertical stripes across the image; encrypting packets identified as being of the specified packet type using a first encryption method to produce first encrypted packets; encrypting the packets identified as being of the specified packet type using a second encryption method to produce second encrypted packets; and replacing the unencrypted packets of the specified packet type with the first encrypted packets and the second encrypted packets in the digital video signal to produce a partially dual encrypted video signal. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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Specification