METHODS OF ADAPTIVE ENCODING AND DECODING VIDEO SIGNALS
First Claim
1. A method of decrypting a video signal, comprising:
- a first reading step of reading a first section of a first line of a video signal;
a second reading step of reading a corresponding section of a second line of a video signal;
comparing the first section of the first line to the corresponding section of the second line;
determining, from the comparison, a difference between the first section and the corresponding section, the difference representing a data value; and
obtaining a plurality of the data values over a number of video fields, the plurality of data values comprising instructions for displaying the video signal.
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Accused Products
Abstract
A method of encoding video signals includes obtaining, averaging, offsetting, and replacing steps. In the obtaining step, a first value comprising a value of a video characteristic for a first portion of a first video signal and a second value comprising a value of the video characteristic for a second portion of a second video signal are obtained. In the averaging step, the first value and the second value are averaged to obtain an average value. In the offsetting step, the average value is offset by a first predetermined offset to obtain a first offset value and the average value is offset by a second predetermined offset to obtain a second offset value. In the replacing step, the first value is replaced with the first offset value on the first signal and the second value is replaced with the second offset value on the second video signal.
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Citations
23 Claims
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1. A method of decrypting a video signal, comprising:
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a first reading step of reading a first section of a first line of a video signal; a second reading step of reading a corresponding section of a second line of a video signal; comparing the first section of the first line to the corresponding section of the second line; determining, from the comparison, a difference between the first section and the corresponding section, the difference representing a data value; and obtaining a plurality of the data values over a number of video fields, the plurality of data values comprising instructions for displaying the video signal. - View Dependent Claims (2, 3, 4, 5)
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6. A method of encoding video content, comprising:
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(a) copying a portion of a first line of video content; (b) determining a signal characteristic value for the copied portion of the first line of video content; (c) creating an adjusted signal portion by adjusting, on the copied portion of the first line of video content, the signal characteristic value by at least a predetermined value; and (d) replacing a portion of a second line of video content corresponding to the portion of the first line of video content with the adjusted signal portion. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of encoding video signals comprising:
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obtaining (i) a first value comprising a value of a video characteristic for a first portion of a first video signal and (ii) a second value comprising a value of the video characteristic for a second portion of a second video signal; averaging the first value and the second value to obtain an average value; offsetting (i) the average value by a first predetermined offset to obtain a first offset value and (ii) the average value by a second predetermined offset to obtain a second offset value; replacing (i) the first value with the first offset value on the first signal and (ii) the second value with the second offset value on the second video signal. - View Dependent Claims (17, 18, 19, 20)
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21. A method of encoding control information on a visible portion of the video signal comprising:
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determining a value of a selected first visible portion of the video signal; determining the value of a selected second visible portion of the video signal; determining the value of the control information to be encoded on the video signal; and adjusting the difference between the value of the selected first portion and the value of the selected second portion in accordance with the value of the control information. - View Dependent Claims (22, 23)
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Specification