Multiplexing technique for stereoscopic video system
First Claim
1. A method for time multiplexing a first video signal comprising horizontal lines and a second video signal comprising horizontal lines, including the steps of:
- horizontally compressing the horizontal lines of the fist video signal to generate first compressed line signals;
horizontally compressing the horizontal lines of the second video signal to generate second compressed line signals; and
generating a multiplexed video signal comprising multiplexed line signals, wherein each of the multiplexed line signals consist of a first number of sample of one of the first compressed line signals concatenated with said first number of samples of one of the second compressed line signals.
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Abstract
A method and apparatus for time multiplexing and demultiplexing two channels of picture information within a standard video channel. The method is specifically designed for field sequential stereoscopic display applications, but may be used for non-stereoscopic applications where conservation of bandwidth is required. The technique is superior to prior art commercially available stereoplexing approaches, and increases vertical resolution while decreasing stair-stepping of diagonal lines. The demultiplexing display controller of the invention can be manufactured at a low cost because its design takes advantage of commercially available integrated circuits.
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Citations
33 Claims
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1. A method for time multiplexing a first video signal comprising horizontal lines and a second video signal comprising horizontal lines, including the steps of:
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horizontally compressing the horizontal lines of the fist video signal to generate first compressed line signals; horizontally compressing the horizontal lines of the second video signal to generate second compressed line signals; and generating a multiplexed video signal comprising multiplexed line signals, wherein each of the multiplexed line signals consist of a first number of sample of one of the first compressed line signals concatenated with said first number of samples of one of the second compressed line signals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for time multiplexing a first video signal comprising horizontal lines and a second video signal comprising horizontal lines, including the steps of:
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horizontally compressing the horizontal lines of the first video signal to generate first compressed line signals; horizontally compressing the horizontal lines of the second video signal to generate second compressed line signals; generating a multiplexed video signal comprising multiplexed line signals, wherein each of the multiplexed line signals consists of one of the first compressed lien signals concatenated with one of the second compressed line signals; and generating a field-sequential video signal from the multiplexed video signal by expanding and demultiplexing the multiplexed line signals. - View Dependent Claims (8, 9, 10, 11)
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12. A method for time multiplexing a first video signal comprising horizontal liens and a second video signal comprising horizontal lines, including the steps of:
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horizontally compressing the horizontal lines of the first video signal to generate first compressed line signals; horizontally compressing the horizontal lines of the second video signal to generate second compressed line signals; generating a multiplexed video signal comprising multiplexed line signals, wherein each of the multiplexed line signals consists of one of the first compressed lien signals concatenated with one of the second compressed line signals; storing the multiplexed video signal; generating reproduced multiplexed line signals by plying back the stored multiplexed video signal; and expanding and demultiplexing the reproduced multiplexed line signals to generate a field-sequential video signal. - View Dependent Claims (13, 14)
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15. An apparatus for time multiplexing a first video signal comprising horizontal lines and a second video signal comprising horizontal lines, including:
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a means for horizontally compressing the horizontal lines of the first video signal to generate first compressed line signals and for horizontally compressing the horizontal liens of the second video signal to generate second compressed line signals; and a multiplexing means for generating a multiplexed video signal comprising multiplexed line signals, wherein each of the multiplexed line signals consists of a first number of samples of one of the first compressed lien signals concatenated with said first number of sample of one of the second compressed line signals. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. An apparatus for processing time multiplexed line signals for display, wherein each of the multiplexed line signals consists of a first compressed line signal concatenated with a second compressed line signal, wherein the first compressed line signals represent a first video signal, and wherein the second compressed line signals represent a second video signal, including:
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a means for demultiplexing the multiplexed line signals to separate the first compressed line signals from the second compressed line signals; and a means for generating horizontally expanded first compressed line signals and horizontally expanded second compressed line signals from the separated first compressed line signals and the separated second compressed line signals, and for combining the horizontally expanded first compressed line signals and the horizontally expanded second compressed line signals to generate a field-sequential video signal. - View Dependent Claims (23, 24)
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25. An apparatus for processing time multiplexed line signals for display, wherein each of the multiplexed line signals consists of a first compressed data stream concatenated with a second compressed data stream, wherein the first compressed data streams represent a first video signal, and wherein the second compressed data streams represent a second video signal, including:
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a memory means having storage locations which map into a grid of rows and columns; a write means for writing the first compressed data streams into a first set of row locations of the memory means at a first data rate, and for writing the second compressed data streams into a second set of row locations of the memory means at said first data rate; and a read means for reading the data stored in the first set of row locations at a second data rate lower than said first data rate, and thereafter reading the data stored in the second set of row locations at the second data rate, to generate a field-sequential video signal. - View Dependent Claims (26, 27, 28)
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29. An apparatus for processing time multiplexed lien signals for display, wherein each of the multiplexed lien signals consist of a first number of samples of a first compressed data stream concatenated with said first number of sample of a second compressed data stream, wherein the first compressed data streams represent a first video signal, and wherein the second compressed data streams represent a second video signal, including:
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a demultiplexing means for receiving the time multiplexed line signals and processing the time multiplexed line signals to produce parallel first and second channels of video information; first projection means for receiving the first channel of video information and projecting a first video image representing said firs channel; and second projection means for receiving the second channel of video information and projecting a second video image representing said second channel. - View Dependent Claims (30)
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31. A method for time multiplexing a first video signal comprising horizontal lines and a second video signal comprising horizontal lines, including the steps of:
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discarding selected pixels comprising each of the horizontal lines of the first video signal to generate first partial lien signals; discarding selected pixels comprising each of the horizontal lines of the second video signal to generate second partial line signals; and generating a multiplexed video signal having a bandwidth substantially identical to that of the first video signal, wherein the multiplexed video signal comprises multiplexed line signals, and wherein each of the multiplexed line signals consists of a first number of sample of one of the first partial line signals concatenated with said first number of samples of one of the second partial line signals.
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32. An apparatus for processing time multiplexed line signals for display, wherein each of the time multiplexed line signals consists of a first compressed data stream concatenated with a second compressed data stream, wherein the first compressed data streams represent a first video signal, and wherein the second compressed data streams represent a second video signal, including:
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a first-in-first-out memory means for receiving the time multiplexed line signals; and a read means for reading a field-sequential video signal from the memory means. - View Dependent Claims (33)
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Specification