Cross-encoding of information in independent channels
AssigneeThomson Licensing
InventorDavid McNeely
Life of this patent
Estimating the term…
Abstract
Independent first and second information signals (content1 and conten2) are transmitted over separate independent physical channels to a receiving location. Security is provided by encoding (12a) at least the first information by means of the second information to produce encoded signals (1′, . . . N′). The encoded signals and the second signals are received from the first and second channels at the second location (230). The encoded first signals are decoded at the receiving location by processing with the second signals. In some embodiments, the second information signals are encoded by processing with the first information signals. In a more general case, plural channels of information are “cross-encoded” by the information in plural other channels, and the plurality may be large.
Claims24
A method for securely transmitting first information from a first location to a second location by way of a first channel, said method comprising the steps of:
- at said first and second location, acquiring second and additional information which is independent of said first information;
- time aligning said second and additional information at both said first and second locations;
- at said first location, relating said first information with said second and additional information by means of a first function to thereby generate a transmitter signal for transmission;
- transmitting said transmitter signal from said first location to said second location by way of a first signal channel;
- at said second location, relating said transmitter signal to said second and additional information with a second function which is the reverse of said first function, to thereby recover said first information.
A method for securely transmitting first and second information from a first location to a second location, said method comprising the steps of:
- processing said first information by means of at least said second information to thereby generate processed first information;
- processing said second information by means of at least said first information to thereby generate processed second information;
- transmitting said processed first and second information separately by way of independent first and second channels, respectively, to said second location;
- and
- at said second location, reverse processing said processed first information by use of at least said processed second information and reverse processing said processed second information by the use of at least said processed first information.
A receiver for simultaneously recovering at least first information received in processed form by way of a first independent physical channel, where said first information transmitted over said first physical channel is processed in conjunction with second information, and said second information is transmitted to said receiver over a second independent channel, said receiver comprising:
- means for receiving said processed first information from said first physical channel;
- means for receiving said second information from said second independent channel;
- and
- processing means for processing said first processed information in conjunction with said second information to extract said first information from said first processed information and said second information.
A method for securely transmitting first and second information streams from a first location to a second location, said method comprising the steps of:
- processing said first information stream by means of at least said second information stream to thereby generate processed first information stream;
- processing said second information stream by means of at least said first information stream to thereby generate processed second information stream;
- transmitting said processed first and second information streams separately by way of independent first and second channels, respectively, to said second location;
- and
- at said second location, reverse processing said processed first information stream by use of at least said processed second information stream and reverse processing said processed second information stream by the use of at least said processed first information stream.
A receiver for simultaneously recovering at least a first information stream received in processed form by way of a first independent physical channel, where said first information stream transmitted over said first physical channel is processed in conjunction with at least a second information stream, and said second information stream is transmitted to said receiver over a second independent channel, said receiver comprising:
- means for receiving said processed first information stream from said first physical channel;
- means for receiving said second information stream from said second independent channel;
- and
- processing means for processing said first processed information stream in conjunction with said second information stream to extract said first information stream from said first processed information and said second information stream.
A method for transmitting a plurality of different information streams from a first location to a second location, said method comprising the steps of:
- at said first location, processing each of at least a plurality, greater than three, of said information streams, by means of at least a plurality, greater than three, of other ones of said information streams, to thereby produce a plurality of processed information streams;
- transmitting said plurality of processed information streams by way of independent channels from said first location to said second location;
- at said second location, reverse processing each of said plurality of said processed information streams by means of other ones of said processed information streams, to thereby recover at least some of said plurality of different information streams.
Dependencies are inferred from the claim text.