Multi-window apparatus
First Claim
1. An image data conversion apparatus which receives an image data digital signal output from a video memory having a plurality of storage areas where a plurality of image data are respectively stored, and also receives an image attribute signal output from an attribute storage means where information on whether expansion of a luminance range is required or not is stored as an image attribute corresponding to each of said storage areas, said image attribute signal providing an instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is required, or providing no instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is not required,said image data conversion apparatus then generating a display data analog signal which allows a display unit to display an image, and thereafter outputting the thus generated signal to the display unit,wherein a luminance value represented by said display data analog signal is increased only when the received image attribute signal provides the instruction to expand the luminance range.
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Abstract
A video memory stores a plurality of image data, and an attribute storage means stores image attributes indicating whether or not the respective image data require expansion of a luminance range. An image data conversion means receives an image data digital signal output from the video memory and an image attribute signal output from the attribute storage means. When the image attribute signal provides an instruction to expand the luminance range, the image data conversion means outputs, to a display unit, a display data analog signal representing a higher luminance value, as compared with the display data analog signal to be output therefrom when the image attribute signal provides no instruction to expand the luminance range.
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Citations
32 Claims
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1. An image data conversion apparatus which receives an image data digital signal output from a video memory having a plurality of storage areas where a plurality of image data are respectively stored, and also receives an image attribute signal output from an attribute storage means where information on whether expansion of a luminance range is required or not is stored as an image attribute corresponding to each of said storage areas, said image attribute signal providing an instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is required, or providing no instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is not required,
said image data conversion apparatus then generating a display data analog signal which allows a display unit to display an image, and thereafter outputting the thus generated signal to the display unit, wherein a luminance value represented by said display data analog signal is increased only when the received image attribute signal provides the instruction to expand the luminance range.
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6. An image data conversion apparatus which receives an image data digital signal output from a video memory having a plurality of storage areas where a plurality of image data are respectively stored, and also receives an image attribute signal output from an attribute storage means where a rate of expansion of a luminance range as well as information on whether the expansion of the luminance range is required or not is stored as an image attribute corresponding to each of said storage areas, said image attribute signal providing an instruction to expand the luminance range and also indicating the rate of expansion of the luminance range when said image attribute indicates that the expansion of the luminance range is required, or providing no instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is not required,
said image data conversion apparatus then generating a display data analog signal which allows a display unit to display an image, and thereafter outputting the thus generated signal to the display unit, wherein a luminance value represented by said display data analog signal is increased in accordance with the received image attribute signal only when the image attribute signal provides the instruction to expand the luminance range.
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9. An image data conversion apparatus which receives a non-luminance-adjusted image data digital signal output from a main memory having a plurality of storage areas where a plurality of image data are respectively stored, and also receives an image attribute signal output from an attribute storage means where information on whether expansion of a luminance range is required or not is stored as an image attribute corresponding to each of said storage areas, said image attribute signal providing an instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is required, or providing no instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is not required,
said image data conversion apparatus then generating a luminance-adjusted image data digital signal and outputting it to a video memory, wherein a luminance value represented by said luminance-adjusted image data digital signal is increased only when the received image attribute signal provides the instruction to expand the luminance range.
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12. An image data conversion apparatus which receives a non-luminance-adjusted image data digital signal output from a main memory having a plurality of storage areas where a plurality of image data are respectively stored, and also receives an image attribute signal output from an attribute storage means where a rate of expansion of a luminance range as well as information on whether the expansion of the luminance range is required or not is stored as an image attribute corresponding to each of said storage areas, said image attribute signal providing an instruction to expand the luminance range and also indicating the rate of expansion of the luminance range when said image attribute indicates that the expansion of the luminance range is required, or providing no instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is not required,
said image data conversion apparatus then generating a luminance-adjusted image data digital signal and outputting it to a video memory, wherein a luminance value represented by said luminance-adjusted image data digital signal is increased in accordance with the received image attribute signal only when the image attribute signal provides the instruction to expand the luminance range.
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14. A multi-widow apparatus comprising:
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an image combining means for combining a plurality if images; and a display unit for displaying, on a screen, an image that is obtained by combining said plurality of images by said image combining means, wherein said image combining means distinguishes a first image from a second image, said first image requiring a relative expansion of its luminance range with respect to said second image, converts luminance ranges of at least one of said first and second images so that an upper limit of the luminance range of said first image exceeds an upper limit of the luminance range of said second image, and then combines said first and second images. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of displaying a plurality of images on a screen, comprising the steps of:
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combining a plurality of images; and displaying, on said screen, an image that is obtained by combining said plurality of images by said combining step; wherein said combining step comprises; a first step of distinguishing a first image from a second image, said first image requiring a relative expansion of its luminance range with respect to said second image; a second step of converting a luminance range of at least one of said first and second images so that an upper limit of the luminance range of said first image exceeds an upper limit of the luminance range of said second image; and a third step of combining said first and second images. - View Dependent Claims (31, 32)
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Specification