PLAYBACK METHOD ACCORDING TO FUNCTION OF PLAYBACK DEVICE
First Claim
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1. A playback device comprising:
- a first remapper that reads a video signal having a first luminance range from a recording medium, performs electro-optical transfer function (EOTF) conversion associated with the first luminance range on a code value represented by a luminance signal in the video signal to obtain a first luminance value, and converts the first luminance value into a second luminance value associated with a second luminance range different in maximum value from the first luminance range;
a second remapper that reads a graphics signal having the first luminance range from the recording medium and performs the EOTF conversion associated with the first luminance range on a code value represented by a luminance signal in the graphics signal to obtain a first luminance value;
a synthesizer that synthesizes the video signal having a luminance value converted by the first remapper with the graphics signal having a luminance value not converted by the second remapper; and
an outputter that outputs a signal synthesized by the synthesizer to a display device.
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Abstract
A method to be performed by a playback device includes determining whether the playback device has a function for converting first graphics in a second luminance range narrower than a first luminance range to second graphics in the first luminance range, when the playback device has the function, converting the first graphics to the second graphics, and displaying a video in the first luminance range with the second graphics being superimposed on the video, and when the playback device does not have the function, displaying the video with third graphics different from the second graphics being superimposed on the video.
2 Citations
7 Claims
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1. A playback device comprising:
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a first remapper that reads a video signal having a first luminance range from a recording medium, performs electro-optical transfer function (EOTF) conversion associated with the first luminance range on a code value represented by a luminance signal in the video signal to obtain a first luminance value, and converts the first luminance value into a second luminance value associated with a second luminance range different in maximum value from the first luminance range; a second remapper that reads a graphics signal having the first luminance range from the recording medium and performs the EOTF conversion associated with the first luminance range on a code value represented by a luminance signal in the graphics signal to obtain a first luminance value; a synthesizer that synthesizes the video signal having a luminance value converted by the first remapper with the graphics signal having a luminance value not converted by the second remapper; and an outputter that outputs a signal synthesized by the synthesizer to a display device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A playback method comprising:
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a first remap step of reading a video signal having a first luminance range from a recording medium, performing electro-optical transfer function (EOTF) conversion associated with the first luminance range on a code value represented by a luminance signal in the video signal to obtain a first luminance value, and converting the first luminance value into a second luminance value associated with a second luminance range different in maximum value from the first luminance range; a second remap step of reading a graphics signal having the first luminance range from the recording medium and performing the EOTF conversion associated with the first luminance range on a code value represented by a luminance signal in the graphics signal to obtain a first luminance value; a synthesis step of synthesizing the video signal having a luminance value converted in the first remap step with the graphics signal having a luminance value not converted in the second remap step; and an output step of outputting a signal synthesized in the synthesis step to a display device.
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Specification
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current
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CPC Class CodesG06F 3/14 Digital output to display d...G11B 20/10 Digital recording or reprod...H04N 11/24 High-definition television ...H04N 21/431 Generation of visual interf...H04N 7/0125 one of the standards being ...H04N 7/015 High-definition television ...H04N 9/642 Multi-standard receiversH04N 9/87 Regeneration of colour tele...H04N 9/8715 involving the mixing of the...
