US5003377A
Expired / Lapsed
US
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Extended definition television systems
Assignee: Massachusetts Institute of Technology
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Filing: 1989-01-12
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Granted: 1991-03-26
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Expires: 2009-01-12
Abstract
Abstract Methods and systems for adding additional information to broadcast motion picture signals so that an advanced receiver can decode that information to provide improved picture quality, while a standard receiver will display an image with minimally visible impairments. In particular, chrominance information can be generated at a fraction of the frame rate and the alternate frames then used to encode additional data, such as high definition luminance information in the chrominance signal.
Inventors
- 👤 Andrew B. Lippman
- 👤 Edward H. Adelson
- 👤 William J. Butera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:40
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N11/00; H04N11/24; H04N11/28
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
56 words
A method of adding information to a broadcast motion picture signal, the method comprising: decomposing sequential frames of said motion picture into luminance and chrominance values; generating a chrominance signal from said chrominance values at a fraction of the rate of said motion picture signal frames; and modulating the generated chrominance signal to encode additional information.
Claim 2
Independent Claim
56 words
A method of adding information to a broadcast motion picture signal, the method comprising: decomposing sequential frames of said motion picture into luminance and chrominance values; generating a chrominance signal from said chrominance values at a fraction of the rate of said motion picture signal frames; and modulating the generated chrominance signal to encode additional information.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the step of decomposing the frames into luminance and chrominance values further includes decomposing the frames into NTSC-compatible broadcast signals.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the step of generating a chrominance signal further comprises generating the chrominance signal at one-half of the frame rate.
Claim 5
Dependent Claim
30 words
The method of claim 3 wherein the step of generating a chrominance signal further comprises generating said chrominance signal based on an averaged chrominance value obtained from two successive frames.
Claim 6
Dependent Claim
36 words
The method of claim 1 wherein the step of modulating the generated chrominance signal further includes adding a data value during one frame and subtracting the data value from the chrominance signal during a next frame.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said additional information encoded in the step of modulating the generated chrominance signal, is high definition luminance information.
Claim 8
Dependent Claim
21 words
The method of claim 1 wherein the method further comprises receiving the modulated chrominance signal and extracting the encoded additional information.
Claim 9
Dependent Claim
66 words
An extended definition television system for adding information to a broadcast motion picture signal, the system comprising: decomposing means for decomposing sequential frames of said motion picture signal into luminance and chrominance values; chrominance signal-generating means for generating a chrominance signal at a fraction of the rate of said motion picture signal frames; and modulating means for modulating the generated chrominance signal to encode additional information.
Claim 10
Dependent Claim
66 words
An extended definition television system for adding information to a broadcast motion picture signal, the system comprising: decomposing means for decomposing sequential frames of said motion picture signal into luminance and chrominance values; chrominance signal-generating means for generating a chrominance signal at a fraction of the rate of said motion picture signal frames; and modulating means for modulating the generated chrominance signal to encode additional information.
Claim 11
Dependent Claim
24 words
The system of claim 8 wherein the chrominance signal-generating means further comprises means for generating the chrominance signal at one-half of the frame rate.
Claim 12
Dependent Claim
29 words
The system of claim 8 wherein the chrominance signal-generating means, further comprises means for generating said chrominance signal based on an averaged chrominance value obtained from two successive frames.
Claim 13
Dependent Claim
33 words
The system of claim 8 wherein the modulating means further includes means for adding a data value during one frame and subtracting the data value from the chrominance signal during a next frame.
Claim 14
Dependent Claim
24 words
The system of claim 8 wherein said additional information encoded in the step of modulating the generated chrominance signal, is high definition luminance information.
Claim 15
Dependent Claim
24 words
The system of claim 8 wherein the system further comprises a receiver for receiving the modulated chrominance signal and extracting the encoded addition information.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |