发明名称 |
Apparatus for processing luminance signal |
摘要 |
A luminance signal processing apparatus that detects an average luminance level, adaptively to various video signal formats. This luminance signal processing apparatus includes a window pulse generation unit 101 for generating a window pulse signal S 110 that indicates a period during which a luminance signal of an input video signal is sampled; a luminance value addition unit 102 for obtaining a total sum of luminance values of the luminance signal in the period indicated by the window pulse signal S 110 ; a number-of-pixel addition unit 103 for obtaining the number of pixels in the period indicated by the window pulse signal S 110 ; a bit shift unit 104 for bit-shifting an output signal of the luminance value addition unit 102 and an output signal of the number-of-pixel addition unit 103 , respectively; and a division unit 105 for dividing the bit-shifted output signal of the luminance value addition unit 102 by the bit-shifted output signal of the number-of-pixel addition unit 103 , thereby obtaining an average luminance level.
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申请公布号 |
US6967692(B1) |
申请公布日期 |
2005.11.22 |
申请号 |
US20020130624 |
申请日期 |
2002.08.12 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KAKUYA YUKI;KAGEYAMA ATSUHISA;OKADA NOBUTAKA;ITO KEIICHI |
分类号 |
G09G5/10;H04N5/20;H04N5/46;H04N5/57;(IPC1-7):H04N9/77;H04N5/14;H04N9/64;H04N9/77 |
主分类号 |
G09G5/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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