Method for encoding or decoding digital data, data disseminating device and data managing device

  • US 8,909,544 B2
  • Filed: 08/15/2011
  • Issued: 12/09/2014
  • Est. Priority Date: 12/27/2010
  • Status: Active Grant
First Claim
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1. A method for encoding digital data capable of tracking data dissemination device, comprising:

  • (a) receiving a digital data by a first data dissemination device;

    (b) encoding a first sign data into the digital data through a linear combination operation to obtain a first encoded digital data by the first data dissemination device, wherein the size of the digital data is not changed after the encoding process;

    (c) disseminating the first encoded digital data by the first data dissemination device;

    (d) receiving the first encoded digital data by a second data dissemination device;

    (e) encoding a second sign data into the first encoded digital data through the linear combination operation to obtain a second encoded digital data by the second data dissemination device, wherein the size of the first encoded digital data is not changed after the encoding process; and

    (f) disseminating the second encoded digital data by the second data dissemination device;

    wherein a data managing device receives the second encoded digital data, the data managing device decodes a correct codeword from the second encoded digital data and identifies at least two error positions of error digits, the at least two error positions denote the first sign data and the second sign data, and the data managing device tracks the first data dissemination device and the second data dissemination device according to the two error positions.

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