Method of providing identification, other digital data and multiple audio tracks in video systems
First Claim
1. A method of providing multiple analog signals in a composite signal of a video system comprising the steps of:
- (a) for each of a plurality of analog signals, sampling such analog signal a predetermined number of times for each video scan line to provide a plurality of sampled analog signals for each video field;
(b) for each sampled analog signal, and for each video field, providing as a video signal for at least one predetermined video scan line associated with such analog signal, the sampled analog signal associated with such analog signal and such field at a rate wherein the sampled analog signal will be within the respective said at least one predetermined video scan line associated with said analog signal;
whereby said plurality of analog signals may be recorded, transmitted and otherwise manipulated as video signals on a plurality of scan lines of each field of the composite signal of the video system.
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0 Petitions
Accused Products
Abstract
A method and apparatus for imbedding digital data and multiple audio (analog) track information in a video signal in a manner compatible with ordinary broadcast TV and transparent to a conventional television receiver is disclosed. The method and apparatus may provide multiple independent audio tracks and a substantial level of interaction with a viewer utilizing special reception equipment, which equipment may be utilized to provide a fully interactive system from signal sources not required to be compatible with convention receivers. The method and apparatus includes the ability of imbedding both analog and digital signals in a video signal, and while advantageous for interactive TV systems, may be used for a multitude of purposes in various video systems.
243 Citations
43 Claims
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1. A method of providing multiple analog signals in a composite signal of a video system comprising the steps of:
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(a) for each of a plurality of analog signals, sampling such analog signal a predetermined number of times for each video scan line to provide a plurality of sampled analog signals for each video field; (b) for each sampled analog signal, and for each video field, providing as a video signal for at least one predetermined video scan line associated with such analog signal, the sampled analog signal associated with such analog signal and such field at a rate wherein the sampled analog signal will be within the respective said at least one predetermined video scan line associated with said analog signal; whereby said plurality of analog signals may be recorded, transmitted and otherwise manipulated as video signals on a plurality of scan lines of each field of the composite signal of the video system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. A method of providing multiple analog signals in a composite signal of a video system comprising the steps of:
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(a) for each of a plurality of analog signals, dividing the analog signal into signal segments, each having a time duration substantially equal to one field time of the video system; (b) for each analog signal, and for each video field, providing as a video signal for at least one predetermined video scan line associated with such analog signal, one of said analog signal segments at a substantially increased rate wherein the analog signal for each field will be within said at least one predetermined video scan line associated with said analog signal; whereby said plurality of analog signals may be recorded, transmitted and otherwise and otherwise manipulated as video signals on a plurality of scan lines of each field of the composite signal of the video system.
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14. A method of providing multiple analog signals in the signal of a video system comprising the steps of:
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(a) for each analog signal, dividing the analog signal into signal segments, each having a time duration substantially equal to one field time of the video system; (b) for each analog signal, and for each video field, providing as a video signal for at least one predetermined video scan line associated with such analog signal, one of said analog signal segments at a substantially increased rate wherein the plurality of analog signals for each field will each be within the video signal of said at least one predetermined video scan line associated with said analog signal; whereby a plurality of analog signals may be recorded, transmitted and otherwise manipulated as video signals on a plurality of scan lines of each field of the signal of the video system. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. Apparatus for detecting any of multiple analog signals in a video signal comprising:
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first means responsive to the video signal for recovering the chroma subcarrier therefrom; second means responsive to the video signal for detecting the occurrence of predetermined lines of each video field third means coupled to said first and second means and responsive to the video signal for providing predetermined portions of said predetermined lines as at least one of said multiple analog signals. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. Apparatus for detecting digital data and any of multiple analog signals in predetermined lines of a video signal comprising
first means responsive to the video signal for recovering the chroma subcarrier therefrom; -
second means responsive to the video signal for detecting the occurrence of at least some of said predetermined lines of each video field; third means for providing a timing reference signal responsive to the video signal passing through a predetermined reference level within a predetermined time window after the horizontal blanking interval, at least for said at least some of said predetermined lines; fourth means responsive to said first, second and third means for sampling the video signal a first predetermined number of chroma subcarrier cycles after the occurrence of said timing reference signal to provide a digital data bit, and for sampling the video signal each N chroma subcarrier cycles thereafter for a second predetermined number of times to provide for the respective predetermined line, a plurality of digital data bits; and fifth means responsive to said first, second and third means for providing predetermined portions of said at least some of said predetermined lines as at least one of said multiple analog signals. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43)
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Specification