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Decoder and method for separating luminance and chrominance information from a composite video signal

A composite video signal and chrominance information technology, applied in the field of decoders, can solve problems such as cross-color and achieve the effect of avoiding cross-color defects

Inactive Publication Date: 2009-09-23
XUESHAN TECH INC
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Problems solved by technology

[0006] In order to solve the above-mentioned problem of cross-color defect when separating luminance and chrominance from the composite video signal, the present invention provides a decoder capable of separating luminance and chrominance information from the target pixel of the composite video signal and its method. Composite video signal separates luminance and chrominance without cross-color artifacts

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  • Decoder and method for separating luminance and chrominance information from a composite video signal
  • Decoder and method for separating luminance and chrominance information from a composite video signal
  • Decoder and method for separating luminance and chrominance information from a composite video signal

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Embodiment Construction

[0020] A video signal includes a plurality of images, and one image includes a plurality of pixels. Separating the luma and chrominance information of the video signal is obtained by separating the luma and chrominance information from each pixel. In general, filters process a target pixel of a sampled composite video signal by first taking the target pixel and its surrounding pixels. figure 1 is a schematic diagram of a filter mask. Such as figure 1 As shown, the target pixel P7 in the filter mask 1 and its surrounding pixels P0, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11 are obtained through the line delay unit and the pixel delay unit , P12, P13 and P14. The number of pixels does not have to be figure 1 15 shown.

[0021] figure 2 is a schematic diagram of the decoder 2 according to an embodiment of the present invention. The decoder 2 includes a delay module 21 , a filter module 23 , a weight factor generator 25 and a separator 27 . Decoder 2 receives composite ...

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Abstract

A decoder and a method for separating luminance and chrominance information from a target pixel in a composite video signal are provided. The decoder comprises a delay module, a filter module, a weighting factor generator, and a separator. The delay module is configured to delay a plurality of horizontal lines of the composite video signal to output a plurality of pixels including the target pixel. The filter module is coupled to the delay module and configured to filter the composite video signal in a horizontal direction and a vertical direction to generate a plurality of frequency components. The weighting factor generator is configured to generate a first weighting factor of the target pixel according to the horizontal direction and a second weighting factor of the target pixel according to the vertical direction. The separator is configured to separate luminance information from the target pixel in accordance with the frequency components, the first weighting factor, and the second weighting factor. The decoder capable of separating luminance and chrominance information from a target pixel in a composite video signal can avoid cross color.

Description

technical field [0001] The present invention relates to video signal processing, and more particularly to decoders and methods for separating luminance and chrominance information from composite video signals. Background technique [0002] Video is a technology originally developed for use in television systems to process a sequence of still images and present them in motion. Video has been further developed into different formats to allow different media, such as the Internet or disk storage and distribution. [0003] A composite video signal includes a luminance component and a chrominance component. Among them, brightness is the photometric value of the density of light intensity, and chromaticity is used to represent the color information of the image. For example, the luminance component of a TV video signal carries primary gray-level information, which is suitable for black and white TV, while the chrominance component carries color information of the TV video signal...

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Application Information

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IPC IPC(8): H04N9/78
CPCH04N9/78
Inventor 陈一弘
Owner XUESHAN TECH INC
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