US5418570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture coding apparatus
Assignee: Toshiba Corp
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Filing: 1993-03-03
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Granted: 1995-05-23
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Expires: 2013-03-03
Abstract
Abstract A motion picture coding apparatus for performing predictive coding on a high-resolution picture signal and coding a low-resolution picture signal obtained by converting the high-resolution picture signal. One field is thinned out from one frame of a picture by a field skip circuit 102, the other field is down-sampled by a down-sampling circuit 29, thereby forming a low-resolution picture. A low-resolution predictive signal, obtained by up-sampling the low-resolution picture by an up-sampling circuit 35, and a high-resolution predictive signal, which is produced from a high-resolution picture and corresponds to the thinned-out one field, are alternately combined by a predictor 104 to form a predictive signal.
Inventors
- 👤 Hideyuki Ueno
- 👤 Yoshihiro Kikuchi
- 👤 Noboru Yamaguchi
- 👤 Toshinori Odaka
- 👤 Tadahiro Oku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:00
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/50; H04N19/503; H04N19/51; H04N19/577; H04N19/10; H04N19/102; H04N19/103; H04N19/105; H04N19/117; H04N19/134; H04N19/136; H04N19/137; H04N19/139; H04N19/154; H04N19/157; H04N19/16; H04N19/169; H04N19/17; H04N19/172; H04N19/30; H04N19/587; H04N19/59; H04N19/60; H04N19/61
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
A motion picture coding apparatus comprising: first coding means for coding a high-resolution picture as a frame picture block by block; first local decoding means for decoding a coding result from said first coding means to obtain a high-resolution local decoded signal; predicting means for attaining a high-resolution predictive signal from said high-resolution local decoded signal; converting means for converting said high-resolution picture to a low-resolution picture; second coding means for coding said low-resolution picture; second local decoding means for decoding a coding result from said second coding means so as to obtain a low-resolution local decoded signal; means for up-sampling said low-resolution local decoded signal as a low-resolution predictive signal; and means for producing a prediction signal for even and odd lines of blocks separately, from said low-resolution predictive signal and said high-resolution predictive signal.
Claim 2
Dependent Claim
136 words
A motion picture coding apparatus comprising: first coding means for coding a high-resolution picture as a frame picture block by block; first local decoding means for decoding a coding result from said first coding means to obtain a high-resolution local decoded signal; predicting means for attaining a high-resolution predictive signal from said high-resolution local decoded signal; converting means for converting said high-resolution picture to a low-resolution picture; second coding means for coding said low-resolution picture; second local decoding means for decoding a coding result from said second coding means so as to obtain a low-resolution local decoded signal; means for up-sampling said low-resolution local decoded signal as a low-resolution predictive signal; and means for producing a prediction signal for even and odd lines of blocks separately, from said low-resolution predictive signal and said high-resolution predictive signal.
Claim 3
Dependent Claim
40 words
The motion picture coding apparatus according to claim 1, wherein said means for up-sampling supplies a signal obtained by shifting said signal up-sampled by an amount corresponding to motion within a field period, to candidates for said low-resolution predictive signal.
Claim 4
Dependent Claim
138 words
A motion picture coding apparatus comprising: first coding means for performing predictive coding on a high-resolution picture; first local decoding means for decoding a coding result from said first coding means to obtain a high-resolution local decoded signal; predicting means for attaining a high-resolution predictive signal from said high-resolution local decoded signal; converting means for converting said high-resolution picture to a low-resolution picture; second coding means for coding said low-resolution picture; second local decoding means for decoding a coding result from said second coding means to obtain a low-resolution local decoded signal; means for up-sampling said low-resolution local decoded signal as a low-resolution predictive signal, and means for producing a prediction signal by using a weighted sum of said low-resolution predictive signal and said high-resolution predictive signal when a prediction mode is used when coding said high-resolution picture.
Claim 5
Dependent Claim
138 words
A motion picture coding apparatus comprising: first coding means for performing predictive coding on a high-resolution picture; first local decoding means for decoding a coding result from said first coding means to obtain a high-resolution local decoded signal; predicting means for attaining a high-resolution predictive signal from said high-resolution local decoded signal; converting means for converting said high-resolution picture to a low-resolution picture; second coding means for coding said low-resolution picture; second local decoding means for decoding a coding result from said second coding means to obtain a low-resolution local decoded signal; means for up-sampling said low-resolution local decoded signal as a low-resolution predictive signal, and means for producing a prediction signal by using a weighted sum of said low-resolution predictive signal and said high-resolution predictive signal when a prediction mode is used when coding said high-resolution picture.
References Cited (Backward Citations)
US5314326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-22 | 1998-11-21 | 1999-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-22 | 2002-11-21 | 2003-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-22 | 2006-11-21 | 2007-05-23 | $7700.00 | Window Closed / Lapsed |