Television – Image signal processing circuitry specific to television – Color television signal processing
Reexamination Certificate
2005-11-22
2005-11-22
Hsia, Sherrie (Department: 2614)
Television
Image signal processing circuitry specific to television
Color television signal processing
C348S687000
Reexamination Certificate
active
06967692
ABSTRACT:
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 unit101for generating a window pulse signal S110that indicates a period during which a luminance signal of an input video signal is sampled; a luminance value addition unit102for obtaining a total sum of luminance values of the luminance signal in the period indicated by the window pulse signal S110; a number-of-pixel addition unit103for obtaining the number of pixels in the period indicated by the window pulse signal S110; a bit shift unit104for bit-shifting an output signal of the luminance value addition unit102and an output signal of the number-of-pixel addition unit103, respectively; and a division unit105for dividing the bit-shifted output signal of the luminance value addition unit102by the bit-shifted output signal of the number-of-pixel addition unit103, thereby obtaining an average luminance level.
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Ito Keiichi
Kageyama Atsuhisa
Kakuya Yuki
Okada Nobutaka
Hsia Sherrie
Matsushita Electric - Industrial Co., Ltd.
Steptoe & Johnson LLP
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