Self-adapted video processing device and method

A technology of image processing and multiplication, applied in the direction of color signal processing circuit, luminance and chrominance signal processing circuit, etc., which can solve the problems of cross-color, not bright enough color, cross-color, etc.

Inactive Publication Date: 2008-02-20
NOVATEK MICROELECTRONICS CORP
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Problems solved by technology

If a narrowbandwidth low-pass filter is used, it is suitable for processing dynamic images; but when processing static images, there will be a problem of color transition, and the color will not be sharp enough because the color is large Part of the high frequency part is filtered out
On the other hand, if a wide bandwidth low-pass filter is used, it is suitable for processing still images, but when processing moving images, there will be problems of cross color

Method used

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  • Self-adapted video processing device and method

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Embodiment Construction

[0029] In order to properly process still images and dynamic images, an embodiment of the present invention discloses an adaptive image processing device, which includes at least two low-pass filters with different bandwidths. When processing still images, the signal processed by the wide-band low-pass filter will have a larger weighting value. On the other hand, when processing dynamic images, the signal processed by the narrow-band low-pass filter will take a larger weighting value. In this way, when processing static images, the problem of color transition can be reduced, and the color can also remain bright; when processing moving images, the problem of cross-color can also be reduced.

[0030] FIG. 1 is a circuit block diagram of a self-adaptive image processing device 10 according to a preferred embodiment of the present invention. Note that Figure 1 is used in the YUV color space. In FIG. 1, the input signal CS represents a composite video signal, and the chrominance ...

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Abstract

The utility model relates to a device and a method for self-adaptive image processing, evaluating the dynamic change degree of a video composite signal. A narrow frequency and wide frequency low-pass is used to filter the color signal of the video composite signal to generate a narrow frequency or wide frequency filtered signal. The narrow frequency or wide frequency filtered signal is weighted according to the evaluated dynamic change degree to decide the retention of high frequency component in the color signal. Much high frequency component is retained in processing the static image to reduce color intermediation and to keep the color floridity of the image; much high frequency component is filtered in processing the dynamic image to reduce color crossing.

Description

technical field [0001] The present invention relates to an adaptive image processing device and method, in particular to an adaptive image processing device and method that can determine how much high-frequency part of the image to retain according to the dynamic degree of the image. Background technique [0002] Watching TV has become one of the leisure ways of modern people. Generally speaking, the video composite signal (also referred to as video composite signal) received by the TV will be different due to the different definition of the color space (color space). For example, when in the YUV color space, the video composite signal will include a luminance component (Y) and a chrominance (color information) component (U and V) (also known as a color information component); the video composite signal can be expressed as Y+ Usin(ωt)+Vcos(ωt). When in the YCbCr color space, the composite video signal includes a luminance component (Y) and a chrominance component (Cb and C...

Claims

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Application Information

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IPC IPC(8): H04N9/64H04N9/77
Inventor 陈玫霏黄泉龙
Owner NOVATEK MICROELECTRONICS CORP
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