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Detection of average luminance levels in different areas of a video image, and automatic discrimination of the image display format based thereon
Detection of average luminance levels in different areas of a video image, and automatic discrimination of the image display format based thereon
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机译:检测视频图像不同区域中的平均亮度水平,并基于此自动判别图像显示格式
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摘要
A high precision aspect ratio auto-discrimination apparatus used for display apparatuses and television receivers comprising: an apparatus for detecting the upper edge and lower edge of a letter box picture through detecting the average luminance of every horizontal scan period; an apparatus for detecting respective average luminance levels in a plurality of specific regions in one field picture controlled by a horizontal synchronous signal and a vertical synchronous signal; and, an aspect ratio discrimination section to which the outputs of said both apparatuses are input. IMAGE
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