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US5870147A
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Predictive video signal coding and decoding with suppression of low frequencies
Assignee: JVCKenwood Corp
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Filing: 1997-07-09
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Granted: 1999-02-09
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Expires: 2017-07-09
Abstract
Abstract In a predictive coding apparatus, an interframe/interfield predictive signal is generated in which low frequency components are depressed. A predictive error signal is generated on the basis of an input video signal and the interframe/interfield predictive signal. The predictive error signal is then interframe/interfield-coded. In a predictive decoding apparatus, a code transmitted from the coding apparatus is interframe/interfield-decoded to obtain a decoded signal. An interframe/interfield predictive signal is generated in which low frequency components are depressed. The video signal is then reproduced by adding the decoded signal and the predictive signal.
Inventors
- 👤 Kenji Sugiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:55
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9261; H04N5/9264; H04N19/00; H04N19/50; H04N19/503; H04N19/51; H04N19/523; H04N19/60; H04N19/61; H04N19/30; H04N5/78; H04N5/782; H04N5/783
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
An apparatus for coding a video signal, comprising: means for generating a first interframe or interfield predictive signal on the basis of an already coded video signal of frame or field; means for generating a second interframe or interfield predictive signal which low frequency components are suppressed by suppressing low frequency components of the first interframe or interfield predictive signal; means for generating a predictive error signal on the basis of an input video signal and the second interframe or interfield predictive signal; and coding means for intraframe or intrafield coding the predictive error signal.
Claim 2
Independent Claim
95 words
An apparatus for coding a video signal, comprising: means for generating a first interframe or interfield predictive signal on the basis of an already coded video signal of frame or field; means for generating a second interframe or interfield predictive signal which low frequency components are suppressed by suppressing low frequency components of the first interframe or interfield predictive signal; means for generating a predictive error signal on the basis of an input video signal and the second interframe or interfield predictive signal; and coding means for intraframe or intrafield coding the predictive error signal.
Claim 3
Independent Claim
100 words
An apparatus for decoding a video signal, comprising: means for intraframe or intrafield decoding a code transmitted from a coding apparatus to obtain a decoded predictive error signal; means for generating a first interframe or interfield predictive signal on the basis of an already decoded video signal of frame or field; means for generating a second interframe or interfield predictive signal which low frequency components are suppressed by suppressing low frequency components of the first interframe or interfield predictive signal; and reproducing means for reproducing the video signal by adding the decoded predictive error signal and the second predictive signal.
Claim 4
Independent Claim
100 words
An apparatus for decoding a video signal, comprising: means for intraframe or intrafield decoding a code transmitted from a coding apparatus to obtain a decoded predictive error signal; means for generating a first interframe or interfield predictive signal on the basis of an already decoded video signal of frame or field; means for generating a second interframe or interfield predictive signal which low frequency components are suppressed by suppressing low frequency components of the first interframe or interfield predictive signal; and reproducing means for reproducing the video signal by adding the decoded predictive error signal and the second predictive signal.
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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) | 2002-02-08 | 2002-08-10 | 2003-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-02-08 | 2006-08-10 | 2007-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-02-08 | 2010-08-10 | 2011-02-09 | $7700.00 | Window Closed / Lapsed |