Dual channel video signal transmission system
AssigneeDeutsche Thomson-Brandt GmbH
InventorsHeinz-Werner Keesen, Dietmar Hepper, Hartmut Peters
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Abstract
Video signal information derived from a high definition source is conveyed via two channels. A first channel conveys relatively low spatial resolution, high temporal resolution video information compatible with a standard television receiver. An auxiliary second channel conveys relatively high spatial resolution, low temporal resolution video information. A high definition television receiver reconstructs original high definition information from the first and second channel information.
Claims32
A system for processing television-type video signals, comprising
- a source of wide bandwidth high definition video signal containing temporally and spatially high resolution image information;
- means responsive to said high definition signal for providing a first video signal having a given temporal resolution and standard spatial resolution less than that of said high definition video signal;
- means responsive to said high definition signal for providing a second video signal having temporal resolution less than that of said first video signal and spatial resolution greater than that of said first video signal;
- a first channel for conveying said first video signal;
- a second channel for conveying said second video signal;
- and
- means for encoding at least one of said video signals conveyed by said first and second channels with information concerning the mode of video signal encoding and with motion vector information.
A system for processing television-type video signals, comprising
- a source of wide bandwidth high definition video signal containing temporally and spatially high resolution image information;
- means responsive to said high definition signal for providing a first video signal having a given temporal resolution and standard spatial resolution less than that of said high definition video signal;
- means responsive to said high definition signal for providing a second video signal having temporal resolution less than that of said first video signal and spatial resolution substantially equal to that of said high definition video signal;
- means for encoding said second video signal conveyed by said second channel with information concerning at least one of the mode of video signal encoding and image motion;
- a first channel for conveying said first video signal;
- and
- a second channel for conveying said second video signal.
A receiver system responsive to first and second video signals derived from a source of a wide bandwidth high definition video signal containing temporally and spatially high resolution image information and conveyed by first and second channels respectively, said first video signal having a given temporal resolution and standard spatial resolution less than that of said high definition video signal;
- said second video signal having a temporal resolution less than that of said first video signal and spatial resolution substantially equal to that of said high definition video signal;
- said receiver system comprising
- signal formatting means responsive to received signals of said first channel for providing a video signal with enhanced resolution compared to a standard television signal;
- decoder and image regeneration means responsive to received signals of said second channel for regenerating an image signal;
- means for combining signals from said decoder and image regeneration means with signals from said signal formatting means to produce a combined signal;
- a signal weighting circuit responsive to said combined signal for provided first and second weighted output signals;
- a first signal multiplier responsive to an output signal from said signal formatting means and to said first weighted output signal;
- a second signal multiplier responsive to an output signal from said decoder and image regenerating means and to said second weighted output signal;
- and
- means for combining output signals from said first and second signal multipliers.
A receiver system responsive to a second video signal conveyed by a second channel, said second video signal having a temporal resolution less than that of a first video signal conveyed by a first channel and having spatial resolution substantially equal to that of a high definition video signal from which said first and second video signals are derived, said receiver comprising:
- decoder means for decoding said received second signal to develop image motion representative information associated with image blocks to be reconstructed to produce an overall image;
- and
- image regeneration means responsive to information including said motion information for regenerating an image signal.
A receiver system responsive to first and second video signals conveyed by first and second channels respectively, said first video signal having a given temporal resolution and standard spatial resolution less than that of a high definition video signal from which said first video signal is derived, said second video signal having a temporal resolution less than that of said first video signal and a spatial resolution substantially equal to that of said high definition video signal from which said second video signal also is derived;
- said receiver comprising
- first means responsive to said first video signal for modifying the scanning format of said first video signal to generate a third video signal having the same scanning format as said second video signal;
- second means responsive to said second video signal for modifying the field rate of said second video signal to generate a fourth video signal having the same field rate as said first video signal;
- and
- third means responsive to said third and fourth video signals for producing an image representative signal.
A system for processing television-type video signals derived from a source of wide bandwidth high definition video signal containing both temporally and spatially high resolution image information, said video signals including a first video signal having a given temporal resolution and standard spatial resolution less than that of said high definition video signal, and a second video signal having temporal resolution less than that of said first video signal and spatial resolution substantially equal to that of said high definition video signal;
- said apparatus comprising:
- first receiver means selectively responsive to said first video signal for reproducing an image having said given temporal resolution and said standard spatial resolution;
- second receiver means responsive to both said first and second video signals for reproducing an image having said temporally and spatially high resolution;
- and
- third receiver means selectively responsive to said second video signal for reproducing an image having said given temporal resolution and said spatially high resolution.
Dependencies are inferred from the claim text.