Video signal decoder based on 3D self-adapting comb filtering

Abstract

The invention discloses a video signal decoder basing on a 3D self-adaptive comb filtering, wherein the digital signals of composite video signals after the AFE processing are input in a synchronous relevant information processing module, an adaptive Y / C illumination and chroma separating module, a SDRAM interface and a controlling module to separate illumination and chroma signals in the adaptive Y / C illumination and chroma separating module; the data of the synchronous relevant information processing module and chroma signals separated by the self-adaptive Y / C illumination and chroma separating module are received by a chroma demodulating module to finish the chroma demodulation and output color difference signals; tricolor signals are output from the illumination and chroma signals through a YUV and RGB chroma spatial switching module. 24-bit output signals are ultimately obtained from the tricolor signal and the chroma signals through the MUX multi-way selection module; SDRAM interface and the controlling module receives sampling data and synchronous control signal storage multiframe data of the synchronous relevant information processing module and supplies operation data to the adaptive Y / C illumination and chroma separating module.

Description

technical field [0001] The present invention relates to a video decoding device, in particular to a complete composite video signal decoder based on 3D (three-dimensional) adaptive comb filtering. Background technique [0002] Composite video decoding is the core technology of digital processing of analog TV signals. It converts composite video signals into digital signals through AD (analog to digital) sampling, completes the extraction of synchronous information, the separation of brightness and chrominance, and after chroma demodulation Get YUV4:4:4 (4:2:2) signal for subsequent video post-processing. Its decoding quality directly affects the final viewing effect and plays an important role in improving the quality of TV display. [0003] At present, most video decoder chips use a low-cost two-dimensional interline comb filter to separate luminance and chrominance. This method only considers the correlation in the video signal space, and only the main spectral lines of l...

AI Technical Summary

Problems solved by technology

[0003] At present, most video decoder chips use a low-cost two-dimensional interline comb filter to separate luminance and chrominance. This method only considers the correlation in the video signal space, and only the main spectral lines of luminance and chrominance are separated. Bright colors still exist

And the way of interline filtering will reduce the vertical resolution of the image and affect the viewing effect

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