Video display apparatus that adjusts video display parameters based on video picture type
First Claim
1. A video display apparatus comprising:
- a luminance information detector for receiving a video signal divided into frames, creating a luminance histogram from one frame of a luminance signal derived from the video signal, and generating luminance information from the luminance histogram;
a content classifier for classifying the content of the one frame according to the luminance information generated by the luminance information detector and generating a first classification value;
a content analyzer for analyzing the first classification values output by the content classifier for a plurality of frames to obtain a second classification value;
a saturation information detector for receiving the video signal, creating a color saturation histogram from at least one frame of a color saturation signal derived from the video signal, and generating color saturation information from the color saturation histogram;
a scene change detector for detecting scene changes in the video signal and generating a scene change detection signal;
a correction controller for outputting a video correction control signal and a display control signal, based on the second classification value, the scene change detection signal, and the color saturation information;
a video corrector for performing a video correction on the video signal, based on the video correction control signal; and
a display unit displaying a video picture according to the video signal output from the video corrector and performing display control according to the display control signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A video display apparatus generates luminance information for individual frames of a video signal from histograms of the luminance component of the video signal, and classifies the content of the video signal on the basis of this information. Color saturation information is also generated from color saturation histograms, and scene changes are detected. Video correction parameters and display control parameters are derived from the content classification and color saturation information. The video signal is corrected according to the video correction parameters, and displayed according to the display control parameters. Display characteristics suitable for the video content are thereby obtained. The parameters are changed when a scene change is detected, so that the viewer is not disturbed by the change in video display characteristics.
18 Citations
9 Claims
-
1. A video display apparatus comprising:
-
a luminance information detector for receiving a video signal divided into frames, creating a luminance histogram from one frame of a luminance signal derived from the video signal, and generating luminance information from the luminance histogram; a content classifier for classifying the content of the one frame according to the luminance information generated by the luminance information detector and generating a first classification value; a content analyzer for analyzing the first classification values output by the content classifier for a plurality of frames to obtain a second classification value; a saturation information detector for receiving the video signal, creating a color saturation histogram from at least one frame of a color saturation signal derived from the video signal, and generating color saturation information from the color saturation histogram; a scene change detector for detecting scene changes in the video signal and generating a scene change detection signal; a correction controller for outputting a video correction control signal and a display control signal, based on the second classification value, the scene change detection signal, and the color saturation information; a video corrector for performing a video correction on the video signal, based on the video correction control signal; and a display unit displaying a video picture according to the video signal output from the video corrector and performing display control according to the display control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification