Two channel compatible high definition television broadcast system
First Claim
1. A system compatible with an N-line television system suitable for direct broadcast satellite transmission of high definition television signals, said system comprising:
- a source of 2N-line, 5;
3 aspect ratio, television signal,first means for deriving from said source signal and transmitting through a first channel N-line, 4;
3 aspect ratio television picture signals,second means for deriving from said source signal and transmitting through a second channel simultaneously with the transmission of signals in said first channel N-line, 5;
3 aspect ratio television picture signals, andat least a first receiver including means for simultaneously receiving television picture signals transmitted through said first and second channels and means for combining the received signals and producing 2N-line, 5;
3 aspect ratio, high definition television pictures.
1 Assignment
0 Petitions
Accused Products
Abstract
A television system for broadcasting high definition television on two channels of a direct broadcast satellite, a first of which carries a compatible 525-line picture. A second channel carries an augmentation signal, which in conjunction with the signal from the first channel, produces at a receiver tuned to both channels a 1050-line high definition television picture with a 5:3 aspect ratio. Time multiplex component signals and processing are employed, and high fidelity sound is provided by digital audio signals transmitted in time sequence with the video. There may be as many as five sound channels so as to provide three-channel stereophonic audio and various combinations of data and sound channels.
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Citations
33 Claims
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1. A system compatible with an N-line television system suitable for direct broadcast satellite transmission of high definition television signals, said system comprising:
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a source of 2N-line, 5;
3 aspect ratio, television signal,first means for deriving from said source signal and transmitting through a first channel N-line, 4;
3 aspect ratio television picture signals,second means for deriving from said source signal and transmitting through a second channel simultaneously with the transmission of signals in said first channel N-line, 5;
3 aspect ratio television picture signals, andat least a first receiver including means for simultaneously receiving television picture signals transmitted through said first and second channels and means for combining the received signals and producing 2N-line, 5;
3 aspect ratio, high definition television pictures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A high definition television system comprising:
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a source of a 1050-line, 60 fields per second (nominal) 2;
1 interlace, 5;
3 aspect ratio, component television signal,first means coupled to said source for deriving from said source signal and transmitting through a first channel a video signal consisting of 525 lines of a width representing only the central 4;
3 aspect ratio area of the television picture represented by said source signal,second means coupled to said source for deriving from said source signal and transmitting through a second channel an augmentation video signal consisting of another 525 lines with 5;
3 aspect ratio, andat least a first receiver including means for receiving and combining the video signals transmitted through said first and second channels to produce a 1050-line, 5;
3 aspect ratio, high definition television picture. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. For a system suitable for direct broadcast satellite (DBS) transmission of television signals to one or more receivers, apparatus for producing first and second channel signals which when combined produce wide screen, high definition television pictures, said signal producing apparatus comprising:
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a source of 1050-line, 2;
1 interlaced, 5;
3 aspect ratio, component television signals,first means coupled to said source for deriving from the source signal for application to said first channel a first video signal consisting of 525 lines representing only the central 4;
3 aspect ratio area of the television picture represented by said source signal, andsecond means coupled to said source for deriving from the source signal for application to said second channel an augmentation video signal consisting of another 525 lines with 5;
3 aspect ratio. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A television transmission system compatible with a television system having N television lines and a standard aspect ratio picture format, said system comprising:
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a source of television picture signal having 2N television lines and a wider than standard aspect ratio picture format and the same height as said standard picture format, first means for deriving from said source for transmission through a first transmission channel a first television signal having N lines and said standard aspect ratio, and second means for deriving from said source for transmission through a second transmission channel simultaneously with the transmission of said first signal a second television signal having N lines and said wider than standard aspect ratio and containing information which when combined with that of said first television signal produces a high definition display having 2N lines and said wider than standard aspect ratio picture format. - View Dependent Claims (28, 29, 30)
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31. A television transmission system for the simultaneous transmission from the same scene for standard and wide picture formats respectively having N lines and a standard aspect ratio and 2N lines and a wider than standard aspect ratio, with both picture formats having the same height, in which a first television signal derived from signal information relating to the scene having 2N lines and said wider than standard aspect ratio and containing information for the production of a display with the standard picture format is transmitted by way of a first transmission path, and a second television signal derived from said signal information relating to the scene having said wider than standard aspect ratio and containing the additional information required to be added to that of said first television signal for the production of a high definition display having 2N lines and said wide picture format is transmitted by way of a second transmission path.
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32. A television transmission system for the simultaneous transmission from the same scene for standard and wide picture formats respectively having N lines and a standard aspect ratio and 2N lines and a wider than standard aspect ratio with both picture formats having the same height, said system comprising:
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a source of signal information relating to the scene having 2N lines and said wider than standard aspect ratio, first means for deriving from said source for transmission through a first transmission path a first television signal having N lines and said standard aspect ratio, second means for deriving from said source for transmission through a second transmission path a second television signal having N lines and said wider than standard aspect ratio and containing information which when combined with that of said first television signal produces a high definition display having 2N lines and said wide picture format. - View Dependent Claims (33)
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Specification