EP0634872A2
Expired / Lapsed
EP
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Processing digital video data
Assignee: Sony Corp
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Filing: 1994-07-11
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Granted: —
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Expires: 2014-07-11
Abstract
Abstract A digital video signal transmitter allows a high quality and smooth dynamic image to be reproduced on the receiving side even with a transmission medium having a low transmission rate. Background plane data representing a still image of a background video image and one or more motion plane data representing still images of respective objects moving on the background image are separated from the input digital video signal. The separated background plane data and each motion plane data are stored individually in memories (23BG and 23A1 to 23An). Change data of the still images stored as the motion plane data is detected based on the input digital video signal and outputs of the memories (23BG and 23A1 to 23An) and is compressed and coded by a coding means (26). Still image data of the plurality of plane data of the memories (23BG and 23A1 to 23An) and the change information from the coding means (26) are transmitted. In a second embodiment, typical image data compared with the motion plane data. Instead of transmitting the motion plane data, the difference between typical image data and the motion plane data together with an indication of the typical image data are transmitted.
Inventors
- 👤 Tetsujiro C/O Intellectual Property Div. Kondo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 11:36
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/234; H04N21/23418; H04N19/00; H04N19/20; H04N19/23; H04N19/46; H04N19/50; H04N19/503; H04N19/51; H04N19/60; H04N19/61; H04N21/235; H04N21/236; H04N21/2365; H04N21/238; H04N21/2383; H04N21/40; H04N21/43; H04N21/435; H04N5/00; H04N5/76; H04N5/78; H04N5/781; H04N5/91; H04N5/92; H04N5/926; H04N5/9261; H04N7/00; H04N7/24; H04N7/52; H04N7/54; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N5/765; H04N5/77; H04N5/772; H04N5/84; H04N5/85
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
An apparatus for coding digital video data, comprising: plane data generating means supplied with several frames of the digital video data for generating background plane data representing a still image of the digital video data and at least one of motion plane data representing a motion image of the digital video data; a plurality of memory means each for storing said background plane data and said at least one of motion plane data; change information detecting means for detecting a motion plane change information representative of a difference between the motion plane data stored in said memory means and the motion plane data of a present frame of said digital video data; and transmitting means for transmitting said background plane data and said motion plane data stored said memory means and the motion plane change information.
Claim 2
Dependent Claim
47 words
The apparatus for coding digital video data according to Claim 1, further comprising change information compressing means connected between said change information detecting means and said transmitting means for generating compressed change information of the change information to output the compressed change information to said transmitting means.
Claim 3
Dependent Claim
58 words
The apparatus for coding digital video data according to Claim 2, further comprising plane data compressing means supplied with the background plane data and the motion plane data for generating compressed background plane data and compressed motion plane data, a compression efficiency of said plane data compressing means being lower than that of said change information compressing means.
Claim 4
Dependent Claim
41 words
The apparatus for coding digital video data according to Claim 1, wherein said memory means for storing the background plane data stores background plane data of wider range of picture frame than that of one screen of the digital video data.
Claim 5
Dependent Claim
102 words
The apparatus for coding digital video data according to Claim 1, wherein said change information detecting means further detects a background plane change information representative of a difference of the background plane data stored in said memory means and the background plane data of a present frame of the digital video data, and further comprising control means for renewing background plane data stored in said memory means on the basis of the background plane change information so that said memory means stores background plane data having a wider range of picture frame than that of one screen of the digital video data.
Claim 6
Dependent Claim
30 words
The apparatus for coding digital video data according to Claim 5, wherein said control means recreates the background plane change information on the basis of the renewed background plane data.
Claim 7
Dependent Claim
34 words
The apparatus for coding digital video data according to Claim 6, wherein said transmitting means transmits the renewed background plane data as background plane data as well as the recreated background plane change information.
Claim 8
Dependent Claim
30 words
The apparatus for coding digital video data according to Claim 5, wherein said control means adds data indicating a position on the background plane to the motion plane change information.
Claim 9
Independent Claim
190 words
An apparatus for coding digital video data, comprising: plane data generating means supplied with several frames of the digital video data for generating background plane data representing a still image of the digital video data and at least one of motion plane data representing a motion image of the digital video data; typical image storing means for storing a plurality of typical image data; a plurality of memory means each for storing said background plane data and said at least one of motion plane data; means for selecting typical image data which resembles most among the typical image data from the background plane data or motion plane data stored in said memory means to obtain discrimination data which corresponds to the selected typical image data and position data which indicates the position of the typical image data; change information detecting means for detecting a motion plane change information representative of a difference of the typical image data and the motion plane data of a present frame of said digital video data; and transmitting means for transmitting the discrimination data and position data as well as the motion plane change information.
References Cited (Backward Citations)
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