发明名称 |
Video signal processing |
摘要 |
A control signal (k_lum) derived from the luminance component (Y) of a video signal is used to adaptively control a temporal noise reduction filter (10) according to the level of motion in a video image. To compress the control signal for storage in a memory (30), the control signal is averaged over each 2x2 pixel area, and then a non-linear compression function is applied. The non-linear compression function preferably selects quantization values of the control signal which correspond to a perceptually substantially linear response in the noise reduction factor (NRF) of the noise filter (10).
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申请公布号 |
US2002101544(A1) |
申请公布日期 |
2002.08.01 |
申请号 |
US20010989247 |
申请日期 |
2001.11.20 |
申请人 |
HENTSCHEL CHRISTIAN;SCHUTTEN ROBERT JAN;RIEMENS ABRAHAM KAREL |
发明人 |
HENTSCHEL CHRISTIAN;SCHUTTEN ROBERT JAN;RIEMENS ABRAHAM KAREL |
分类号 |
H04N5/21;H04N9/64;(IPC1-7):H04N7/12 |
主分类号 |
H04N5/21 |
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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