Method and system for eliminating ghost of television signal based on wavelet preprocessing GCR

A TV signal and ghost elimination technology, applied to TV system components, TVs, color TVs, etc., to achieve the effects of reducing ghosting, reducing training time, and reducing power consumption

Inactive Publication Date: 2008-11-12
HUNAN UNIV
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Problems solved by technology

[0009] In order to solve the above-mentioned technical problems existing in the prior use of GCR signals to eliminate TV signal ghosts, the present invention provides a TV signal ghost elimination method and system based on wavelet preprocessing GCR that can effectively remove TV signal ghosts

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  • Method and system for eliminating ghost of television signal based on wavelet preprocessing GCR
  • Method and system for eliminating ghost of television signal based on wavelet preprocessing GCR
  • Method and system for eliminating ghost of television signal based on wavelet preprocessing GCR

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Embodiment Construction

[0038] see figure 2 , figure 2 It is a block diagram of the ghost elimination system of the present invention. It consists of 6 parts: input module 1, preprocessing unit 2, channel estimation and filter training unit 3, de-ghosting filter 4, equalization filter 5, and output module 6. Among them, the input module 1 has a built-in A / D converter, which receives the input analog TV signal containing the GCR signal, and converts the analog signal into a corresponding digital signal; the preprocessing unit 2 mainly uses wavelet transform to remove the GCR signal. Noise processing, thereby improving the signal-to-noise ratio of the GCR signal; the function of the channel estimation and filter training unit 3 is to characterize the channel and determine the optimal de-ghosting filter coefficient; de-ghosting filter 4 and equalization filter 5 use to eliminate post-ghosting and nearby ghosting; the output module 6 provides the output of digital video signals.

[0039] image 3 T...

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Abstract

The invention relates to a television signal ghost canceling method based on wavelet pretreatment GCR and a system thereof. The method comprises the following steps: the denoise of a received GCR signal is carried out by wavelet transformation, the channel feature is estimated according to the de-noised GCR signal waveform, an optimum coefficient of a ghost canceling filter and an equalization filter is obtained and ghost canceling to the digital television signal is carried out by the ghost canceling filter and the equalization filter. By adopting the method, the tap number of the filter can be reduced, thus reducing the hardware requirement of the ghost canceling system, and the power consumption of a chip reduces as MAC operation reduces. The method and the system provided by the invention can reduce the training time of the filter, track the time-varying channel rapidly and reduce the hardware requirement of the system, and have important theoretical meaning and practical meaning in digital mobile communication.

Description

technical field [0001] The invention relates to a method for eliminating ghosts of television signals, in particular to a method and system for eliminating ghosts of television signals based on wavelet preprocessing GCR. Background technique [0002] For decades, the ghosting problem in TV broadcasting is one of the annoying problems. TV ghosting phenomenon can be regarded as echo interference or channel dispersion phenomenon, which causes great damage to the quality of analog and digital broadcasting and communication. With the development of signal processing and microelectronics, it has become possible to eliminate ghosting in television or to correct for diffused channels. Ghost cancellation not only eliminates or mitigates ghosting in television reception, but it often equalizes the entire channel to deliver near-studio quality television images. In digital communication, in principle, ghost cancellation can eliminate or reduce channel dispersion, effectively reduce bi...

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Application Information

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IPC IPC(8): H04N5/21
CPCY02B60/50
Inventor 黄姣英何怡刚张松华
Owner HUNAN UNIV
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