EP0292284A2
Expired / Lapsed
EP
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Method and apparatus for processing display colour signal
Assignee: Sony Corp
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Filing: 1988-05-19
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Granted: —
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Expires: 2008-05-19
Abstract
Abstract A color video signal processing method and apparatus wherein compressed display data of each pixel is formed of color identification code and color saturation data relative to the color or luminance of one pixel having the maximum saturation change in comparison with an adjacent pixel, and the original color data is reproduced from such display data. Furthermore, a plurality of representative colors are prepared per value of specific color, and the optimal color is selected per pixel to provide display data. A distribution of color appearance frequencies is employed for determining the representative color, and such colors are so selected as to have the maximum color distances from one another.
Inventors
- 👤 Tetsujiro Kondo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:51
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; G; G09; G09G; G09G5/00; G09G5/02; H04N1/00; H04N1/46; H04N1/64; H04N1/644
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
85 words
A method for processing display color signal, comprising the steps of: receiving a series of display data each having an identification data to identify selected one of a plurality of color components and a luminance of respective color pixel data and code data corresponding to a value thereof; generating color data having a color identified by the identification data of each display data and having a value corresponding to the code data; and holding the color data until the same identification data is received next.
Claim 2
Independent Claim
85 words
A method for processing display color signal, comprising the steps of: receiving a series of display data each having an identification data to identify selected one of a plurality of color components and a luminance of respective color pixel data and code data corresponding to a value thereof; generating color data having a color identified by the identification data of each display data and having a value corresponding to the code data; and holding the color data until the same identification data is received next.
Claim 3
Independent Claim
88 words
An apparatus for processing display color signal, comprising: means for receiving a series of display data each having an identification data to identify selected one of a plurality of color components and a luminance of respective color pixel data and code data corresponding to a value thereof; means for generating color data having a color identified by the identification data of each display data and having a value corresponding to the code data; and means for holding the color data until the same identification data is received next.
Claim 4
Independent Claim
88 words
An apparatus for processing display color signal, comprising: means for receiving a series of display data each having an identification data to identify selected one of a plurality of color components and a luminance of respective color pixel data and code data corresponding to a value thereof; means for generating color data having a color identified by the identification data of each display data and having a value corresponding to the code data; and means for holding the color data until the same identification data is received next.
Claim 5
Independent Claim
115 words
A method for processing color signal, comprising the steps of: receiving a series of color pixel data; comparing at least two of each value of a plurality of color components and a luminance of respective color pixel data with respective adjacent preceding pixel data; selecting one of the plurality of color components or the luminance included in the present color pixel data and having the maximum differential value in comparison with the preceding color pixel data; generating identification data to indicate selected one of the plurality of color components and the luminance; and combining the identification data and the code data corresponding to the value of the selected one so as to generate display data.
Claim 6
Independent Claim
115 words
A method for processing color signal, comprising the steps of: receiving a series of color pixel data; comparing at least two of each value of a plurality of color components and a luminance of respective color pixel data with respective adjacent preceding pixel data; selecting one of the plurality of color components or the luminance included in the present color pixel data and having the maximum differential value in comparison with the preceding color pixel data; generating identification data to indicate selected one of the plurality of color components and the luminance; and combining the identification data and the code data corresponding to the value of the selected one so as to generate display data.
Claim 7
Dependent Claim
13 words
The method according to claim 1, wherein said color components are primary colors.
Claim 8
Dependent Claim
21 words
The method according to claim 1, wherein said code data have a compressed value of the value of the selected one.
Claim 9
Independent Claim
149 words
A method for processing color signal, comprising the steps of: receiving a series of color pixel data; obtaining a value of a predetermined color component of the present color pixel data; providing a representative color data corresponding to the value of the predetermined color component; generating respective residual error values between preceding color pixel data and predicted color pixel data when the preceding color pixel data is assumed to be replaced with color pixel data having the predicted color components; comparing the respective residual error values; selecting one of sets of a plurality of color components providing the minimum residual error values, corresponding to the present color pixel data; generating identification data to indicate selected one of the sets of a plurality of color components; and combining the identification data and code data corresponding to the value or values of the selected one so as to generate display data.
Claim 10
Independent Claim
149 words
A method for processing color signal, comprising the steps of: receiving a series of color pixel data; obtaining a value of a predetermined color component of the present color pixel data; providing a representative color data corresponding to the value of the predetermined color component; generating respective residual error values between preceding color pixel data and predicted color pixel data when the preceding color pixel data is assumed to be replaced with color pixel data having the predicted color components; comparing the respective residual error values; selecting one of sets of a plurality of color components providing the minimum residual error values, corresponding to the present color pixel data; generating identification data to indicate selected one of the sets of a plurality of color components; and combining the identification data and code data corresponding to the value or values of the selected one so as to generate display data.
Claim 11
Independent Claim
132 words
A method for processing color signal, comprising the steps of: receiving a series of color pixel data; generating respective residual error values between preceding color pixel data and predicted color pixel data when only each one of a plurality of color components and a luminance of the preceding color pixel data is assumed to be replaced with that of the preceding color pixel data; comparing the respective residual error values; selecting one of the plurality of color components or the luminance providing the minimum residual error values, corresponding to the present color pixel data; generating identification data to indicate selected one of the plurality of color components and the luminance; and combining the identification data and code data corresponding to the value of the selected one so as to generate display data.
Claim 12
Independent Claim
132 words
A method for processing color signal, comprising the steps of: receiving a series of color pixel data; generating respective residual error values between preceding color pixel data and predicted color pixel data when only each one of a plurality of color components and a luminance of the preceding color pixel data is assumed to be replaced with that of the preceding color pixel data; comparing the respective residual error values; selecting one of the plurality of color components or the luminance providing the minimum residual error values, corresponding to the present color pixel data; generating identification data to indicate selected one of the plurality of color components and the luminance; and combining the identification data and code data corresponding to the value of the selected one so as to generate display data.
Claim 13
Independent Claim
83 words
A method for processing color signal, comprising the steps of: receiving a series of color pixel data of a space to be subjected to process; obtaining a distribution of appearance frequencies of colors in the space to be subjected to process; selecting a first color having the maximum appearance frequency as a first representative color; and selecting, as a second representative color, a second color having the farthest color distance from the first representative color in a predetermined range of the appearance frequencies.
Claim 14
Independent Claim
83 words
A method for processing color signal, comprising the steps of: receiving a series of color pixel data of a space to be subjected to process; obtaining a distribution of appearance frequencies of colors in the space to be subjected to process; selecting a first color having the maximum appearance frequency as a first representative color; and selecting, as a second representative color, a second color having the farthest color distance from the first representative color in a predetermined range of the appearance frequencies.
References Cited (Backward Citations)
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