Arrangement for and method of processing data, especially for identifying and verifying airing of television broadcast programs
First Claim
Patent Images
1. A method of processing data with a television signal having an active video component and a timing component for lines of a picture to be displayed on a viewing area of a television receiver, comprising the steps of:
- (a) generating a carrier signal in timed relation to the timing component of the television signal;
(b) generating a data signal indicative of the data to be processed;
(c) modulating the carrier signal and the data signal in timed relation to the timing component of the television signal to form a data-modulated signal having a low amplitude in a range from 0.1 to 2.5 IRE;
(d) adding the data-modulated signal to the active video component of the television signal to form an encoded composite signal on a plurality of lines of the picture; and
(e) transmitting the encoded composite signal to the receiver for displaying the picture on the viewing area, said data-modulated signal on said plurality of lines of the picture being substantially invisible to a viewer of the picture due to said low amplitude.
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0 Petitions
Accused Products
Abstract
Data are added invisibly to the active video component of a television signal by a modulated carrier. The data, upon recovery, may be used for numerous purposes, including network signaling, data transmission, program identification, remote machine control, broadcast verification, and signal quality detection and measurement.
675 Citations
35 Claims
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1. A method of processing data with a television signal having an active video component and a timing component for lines of a picture to be displayed on a viewing area of a television receiver, comprising the steps of:
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(a) generating a carrier signal in timed relation to the timing component of the television signal; (b) generating a data signal indicative of the data to be processed; (c) modulating the carrier signal and the data signal in timed relation to the timing component of the television signal to form a data-modulated signal having a low amplitude in a range from 0.1 to 2.5 IRE; (d) adding the data-modulated signal to the active video component of the television signal to form an encoded composite signal on a plurality of lines of the picture; and (e) transmitting the encoded composite signal to the receiver for displaying the picture on the viewing area, said data-modulated signal on said plurality of lines of the picture being substantially invisible to a viewer of the picture due to said low amplitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 26)
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12. An arrangement for processing data with a television signal having an active video component and a timing component for lines of a picture to be displayed on a viewing area of a television receiver, comprising:
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(a) means for generating a carrier signal in timed relation to the timing component of the television signal; (b) means for generating a data signal indicative of the data to be processed; (c) means for modulating the carrier signal and the data signal in timed relation to the timing component of the television signal to form a data-modulating signal having a low amplitude in a range from 0.1 to 2.5 IRE; (d) means for adding the data-modulated signal to the active video component of the television signal to form an encoded composite signal on a plurality of lines of the picture; and (e) means for transmitting the encoded composite signal to the receiver for displaying the picture on the viewing area, said data-modulated signal on said plurality of. lines of the picture being substantially invisible to a viewer of the picture due to said low amplitude. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An arrangement for encoding data onto a television signal having an active video component and a timing component for lines of a picture to be displayed on a viewing area of a television receiver, comprising:
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(a) means for generating a carrier signal in timed relation to the timing component of the television signal; (b) means for generating a data signal indicative of the data to be processed; (c) means for modulating the carrier signal and the data signal in timed relation to the timing component of the television signal to form a data-modulated signal having a low amplitude in a range from 0.1 to 2.5 IRE; and (d) means for adding the data-modulated signal to the active video component of the television signal to form an encoded composite signal on a plurality of lines of the picture, said data-modulated signal on said plurality of lines of the picture being substantially invisible to a viewer of the picture due to said low amplitude.
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24. An arrangement for decoding data encoded on a data-modulated signal that is transmitted together with, and on multiple picture lines of, a television signal, comprising:
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(a) means for receiving the transmitted data-modulated signal and the television signal on a television receiver having a viewing area on which a multiline picture is displayed, said data-modulated signal on each picture line of the picture having a low amplitude in a range from 0.1 to 2.5 IRE to render the data-modulated signal substantially invisible to a viewer; and (b) means for demodulating the transmitted signals to extract therefrom a data signal indicative of the encoded data. - View Dependent Claims (25)
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27. Apparatus for encoding a baseband composite video signal with auxiliary digital data, comprising:
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a source of said baseband composite video signal having an amplitude, a spectral band and line intervals; a source of said auxiliary digital data comprised of bits; means for generating a modulated carrier having an amplitude and a frequency within the spectral band occupied by said composite video signal, and wherein each respective bit of said auxiliary digital data modulates said carrier over at least two line intervals of said composite video signal; and means for adding said modulated carrier to said baseband composite video signal. - View Dependent Claims (28, 29, 30, 31, 32)
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33. Apparatus for decoding a television signal including auxiliary digital data occurring in active potions of a baseband composite video signal, said auxiliary digital data being comprised of bits for modulating an auxiliary carrier and conveying information, wherein each respective bit of said auxiliary digital data occupies at least the active portion of an interval, said apparatus comprising:
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means for receiving said television signal and translating it to said baseband video signal; means responsive to said baseband video signal for demodulating said auxiliary carrier to produce a demodulated auxiliary signal; and means for integrating said demodulated auxiliary signal over intervals occupied by respective said bits to provide said auxiliary digital data. - View Dependent Claims (34, 35)
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Specification