Patent EP0430631B1 successfully refreshed from Google Patents.
EP0430631B1
Expired / Lapsed
EP
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A highly efficient coding apparatus
Assignee: Sony Corp
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Filing: 1990-11-27
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Granted: 1996-08-14
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Expires: 2010-11-27
Abstract
No abstract record available.
Inventors
- 👤 Tetsujiro Kondo
- 👤 Kenji Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:11
CPC Classifications
H; H03; H03M; H03M7/00; H04; H04N; H04N19/00; H04N19/90; H04N19/98
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
209 words
A coding apparatus for coding digital video data in a format composed of blocks of digital video data representing a three-dimensional group of picture elements belonging to a plurality of fields and allowing compression of the video data, the apparatus comprising: interpolating means (5) for interpolating digital video data of one of said plurality of fields of one block from at least digital video data of one other of said plurality of fields of said block and for generating interpolated digital video data; detecting means (12) for detecting a difference between said interpolated digital video data and said digital video data; control signal generating means (14,17,19) for generating a control signal (SJ) for said block in response to the output of said detecting means (12); encoding means (7,8) for encoding digital video data of all of said plurality of fields of said block in a first mode and for encoding digital video data of said one other of said plurality of fields of said block in a second mode; selecting means (9) for selecting one of said first and second modes in response to said control signal (SJ); and transmitting means (10) for transmitting the output of said encoding means (7,8) and said control signal for each said block.
Claim 2
Dependent Claim
46 words
A coding apparatus according to claim 1, wherein said interpolating means (5) is operative to interpolate digital video data from digital video data of said block and digital video data of a block spatially corresponding to said block and timely preceding or succeeding to said block.
Claim 3
Dependent Claim
48 words
A coding apparatus according to claim 1 or 2, wherein said control signal generating means includes means (14) for accumulating the output of said detecting means (12) during said block and comparator means (17) for comparing the output of said accumulating means (14) with a reference signal (18).
Claim 4
Dependent Claim
141 words
A coding apparatus according to claim 1, 2 or 3, further comprising sub-sampling means (Fig. 10) for sub-sampling picture elements in predetermined position in each said blocks of digital video data to reduce the number of picture elements in each said blocks to 1/n of the original number of the picture elements in each of said blocks; calculating means (Fig. 10) for calculating the difference between the thinned out data and interpolated data according to a plurality of interpolating methods using digital video data of picture elements spatially and temporally adjacent to the picture element corresponding to said thinned out data; and selecting means (139) for selecting one of said plurality of interpolating methods in response to the output of said calculating means and for generating flag data for each block, said flag data being transmitted by said transmitting means (10).
References Cited (Backward Citations)
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