US5436665A
Expired / Lapsed
US
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Motion picture coding apparatus
Assignee: Toshiba Corp
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Filing: 1993-11-19
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Granted: 1995-07-25
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Expires: 2013-11-19
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, 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, 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 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
2026-10-30 20:32
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: 8
Claim 1
Independent Claim
173 words
A motion picture coding apparatus comprising: first coding means for prediction-coding a high-resolution interlaced picture as a frame picture; first local decoding means for decoding a coding result from said first coding means to obtain a high-resolution local decoded signal; first prediction means for attaining a high-resolution predictive signal from the high-resolution local decoded signal; converting means for converting the high-resolution interlaced picture to a low-resolution picture; second coding means for coding the low-resolution picture signal; second local decoding means for decoding a coding result from said second coding means to obtain a low-resolution local decoded signal; up-sampling means for up-sampling the low-resolution local decoded signal; second prediction means for attaining a low-resolution predictive signal from a signal up-sampled by said up-sampling means; and selection means for selecting an optimal one of the low-resolution predictive signal and the high-resolution predictive signal, used when performing predictive coding, as the frame picture for each of even and odd fields, whereby a predictive signal is produced from the low-resolution predictive signal and the high-resolution predictive signal.
Claim 2
Dependent Claim
173 words
A motion picture coding apparatus comprising: first coding means for prediction-coding a high-resolution interlaced picture as a frame picture; first local decoding means for decoding a coding result from said first coding means to obtain a high-resolution local decoded signal; first prediction means for attaining a high-resolution predictive signal from the high-resolution local decoded signal; converting means for converting the high-resolution interlaced picture to a low-resolution picture; second coding means for coding the low-resolution picture signal; second local decoding means for decoding a coding result from said second coding means to obtain a low-resolution local decoded signal; up-sampling means for up-sampling the low-resolution local decoded signal; second prediction means for attaining a low-resolution predictive signal from a signal up-sampled by said up-sampling means; and selection means for selecting an optimal one of the low-resolution predictive signal and the high-resolution predictive signal, used when performing predictive coding, as the frame picture for each of even and odd fields, whereby a predictive signal is produced from the low-resolution predictive signal and the high-resolution predictive signal.
Claim 3
Dependent Claim
153 words
A motion picture decoding apparatus comprising: first decoding means for prediction-decoding a coded signal of a high-resolution interlaced picture as a frame picture to obtain a high-resolution decoded signal; first prediction means for attaining a high-resolution predictive signal from the high-resolution decoded signal obtained by said first decoding means; second decoding means for decoding a coded signal of a low-resolution picture to obtain a low-resolution decoded signal; up-sampling means for up-sampling the low-resolution decoded signal obtained by said second decoding means; second prediction means for attaining a low-resolution predictive signal from an up-sampled signal attained by said up-sampling means; and means for applying at least one of the high-resolution predictive signal and the low-resolution predictive signal as a reference signal for each of even and odd fields in accordance with a prediction mode corresponding to the coded signal, when the coded signal of the high-resolution interlaced picture is prediction-decoded as a frame picture.
Claim 4
Dependent Claim
153 words
A motion picture decoding apparatus comprising: first decoding means for prediction-decoding a coded signal of a high-resolution interlaced picture as a frame picture to obtain a high-resolution decoded signal; first prediction means for attaining a high-resolution predictive signal from the high-resolution decoded signal obtained by said first decoding means; second decoding means for decoding a coded signal of a low-resolution picture to obtain a low-resolution decoded signal; up-sampling means for up-sampling the low-resolution decoded signal obtained by said second decoding means; second prediction means for attaining a low-resolution predictive signal from an up-sampled signal attained by said up-sampling means; and means for applying at least one of the high-resolution predictive signal and the low-resolution predictive signal as a reference signal for each of even and odd fields in accordance with a prediction mode corresponding to the coded signal, when the coded signal of the high-resolution interlaced picture is prediction-decoded as a frame picture.
Claim 5
Dependent Claim
56 words
The motion picture decoding apparatus according to claim 2, wherein said selecting means comprises means for selecting one of the high-resolution predictive signal, the low-resolution predictive signal, and a predictive signal obtained by merging the high-resolution predictive signal and the low-resolution predictive signal for each of even and odd fields in accordance with the prediction mode.
Claim 6
Dependent Claim
42 words
The motion picture decoding apparatus according to claim 2, which comprises means for selecting one of the low-resolution predictive signal, the high-resolution predictive signal, and a weighted sum of the low-resolution and high-resolution predictive signals for each of even and odd fields.
Claim 7
Independent Claim
264 words
A method of coding and decoding a motion picture comprising: a coding process including: the steps of prediction-coding a high-resolution interlaced picture as a frame picture; decoding a coding result to obtain a high-resolution local decoded signal; attaining a high-resolution predictive signal from the high-resolution local decoded signal; converting the high-resolution interlaced picture to a low-resolution picture; coding the low-resolution picture signal to obtain a coding result; decoding the coding result to obtain a low-resolution local decoded signal; up-sampling means for up-sampling the low-resolution local decoded signal; attaining a low-resolution predictive signal from an up-sampled signal; and selecting an optimal one of the low-resolution predictive signal and the high-resolution predictive signal, used when performing predictive coding, as the frame picture for each of even and odd fields, whereby a predictive signal is produced from the low-resolution predictive signal and the high-resolution predictive signal; and a decoding process including: the steps of prediction-decoding the coded signal of the high-resolution interlaced picture as a frame picture to obtain a high-resolution decoded signal; attaining a high-resolution predictive signal from the high-resolution decoded signal; decoding a coded signal of a low-resolution picture corresponding to the high-resolution interlaced picture to obtain a low-resolution decoded signal; up-sampling means for up-sampling the low-resolution decoded signal; attaining a low-resolution prediction signal from an up-sampled signal; selecting at least one of the high-resolution predictive signal and the low-resolution predictive signal for each of even and odd fields in accordance with a prediction mode corresponding to the coded signal, when the coded signal of the high-resolution interlaced picture is prediction-decoded as a frame picture.
Claim 8
Independent Claim
264 words
A method of coding and decoding a motion picture comprising: a coding process including: the steps of prediction-coding a high-resolution interlaced picture as a frame picture; decoding a coding result to obtain a high-resolution local decoded signal; attaining a high-resolution predictive signal from the high-resolution local decoded signal; converting the high-resolution interlaced picture to a low-resolution picture; coding the low-resolution picture signal to obtain a coding result; decoding the coding result to obtain a low-resolution local decoded signal; up-sampling means for up-sampling the low-resolution local decoded signal; attaining a low-resolution predictive signal from an up-sampled signal; and selecting an optimal one of the low-resolution predictive signal and the high-resolution predictive signal, used when performing predictive coding, as the frame picture for each of even and odd fields, whereby a predictive signal is produced from the low-resolution predictive signal and the high-resolution predictive signal; and a decoding process including: the steps of prediction-decoding the coded signal of the high-resolution interlaced picture as a frame picture to obtain a high-resolution decoded signal; attaining a high-resolution predictive signal from the high-resolution decoded signal; decoding a coded signal of a low-resolution picture corresponding to the high-resolution interlaced picture to obtain a low-resolution decoded signal; up-sampling means for up-sampling the low-resolution decoded signal; attaining a low-resolution prediction signal from an up-sampled signal; selecting at least one of the high-resolution predictive signal and the low-resolution predictive signal for each of even and odd fields in accordance with a prediction mode corresponding to the coded signal, when the coded signal of the high-resolution interlaced picture is prediction-decoded as a frame picture.
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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) | 1998-07-24 | 1999-01-23 | 1999-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-24 | 2003-01-23 | 2003-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-24 | 2007-01-23 | 2007-07-25 | $7700.00 | Window Closed / Lapsed |