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| Device and method for displaying broadcast program guide in a programmed recording system |
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| Reproducing method and apparatus |
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| Video processing circuit |
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| Optical absorbance meter |
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| Providing data to applications from an access system |
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| Luminance/chrominance separating apparatus having a spatial filtering effect |
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| Circuit for removing jitter of chrominance signal and television set using the same |
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| Remote tracking control system for a video cassette tape recorder |
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Image processing apparatus including selecting function for displayed colors
| Details |
Inventors: Takahashi, Mitsuhiro; Tahata, Syouichi;
Assignee: Hudson Soft Co., Ltd. (Hokkaido, JP)
Primary Examiner: Nguyen; Chanh
Assistant Examiner:
Attorney, Agent or Firm: Lowe, Price, LeBlanc & Becker
Colors of plural pictures are defined by using color pallet data. Predetermined digital data are stored in a memory. The color pallet data are converted to the corresponding digital data stored in the memory. The memory contents are addressed by using an offset address (relative address) established for each picture. |
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DETAILED DESCRIPTION It is an object of the present invention to provide a high performance computer in which a variety of images may be processed by using a single color pallet RAM.
According to the invention, an image processing apparatus, in which colors of plural pictures are defined by using color pallet data, includes a memory which stores digital data for defining the colors of the pictures, and converts the color pallet data to corresponding digital data.
The memory is addressed by using an offset address (relative address) established for each picture.
In more detail, the memory (color pallet RAM) is addressed by using offset type address data (relative address data) so that a pallet base address of the color pallet RAM may be changed.
In the invention, a start address for rewriting is specified as the offset address.
When each of the pictures to be displayed has its own offset address, different colors may be specified for the pictures by using the same pallet data.
The address and color data definitely correspond to each other, so that many colors may be used to display the image easily.
For example, the color pallet address of 9 bits is defined by the color pallet data of 8 bits and offset address of 8 bits.
The offset address does not specify the color pallet directly, that is, a half of the offset address is set in a special register.
Namely, the color pallet address is given by the following formula.
COLOR PALLET ADDRESS=COLOR PALLET DATA+OFFSET ADDRESS.
times.
2 In the invention, YUV system data are used instead of RGB system data to define a display color.
The display colors are specified by using the color pallet in a video encoder when the number of the colors is less than a predetermined number (for example, 256), and the colors are specified by the YUV color data directly when the number of the colors is more than the predetermined number.
When the RGB system data are adopted, a color to be displayed is defined by the three colors red, green and blue.
When the YUV system data are adopted, a color to be displayed is defined by brightness data (Y) and color difference data (U and V), in which "Y" indicates brightness, "U" indicates a color difference in a blue-yellow family, and "V" indicates a color difference in a red-green family
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TV Signal 
