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Coaxial adaptive analog high-definition transmission anti-attenuation device and method based on differential compensation

An adaptive and anti-attenuation technology, applied in the field of video transmission, which can solve the problems of frame synchronization signal and brightness signal deformation, affecting the accurate decoding and signal display of the receiving end, avoiding blurred boundaries, improving signal display effect, and reducing attenuation distortion. Effect

Active Publication Date: 2017-03-15
浙江芯劢微电子股份有限公司
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AI Technical Summary

Problems solved by technology

[0003] Existing problems and shortcomings: After the analog high-definition signal is transmitted through the coaxial line for a certain distance, the line synchronization signal, frame synchronization signal and brightness signal are obviously deformed at the rising / falling edge, which affects the accurate decoding and signal display of the receiving end

Method used

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  • Coaxial adaptive analog high-definition transmission anti-attenuation device and method based on differential compensation
  • Coaxial adaptive analog high-definition transmission anti-attenuation device and method based on differential compensation
  • Coaxial adaptive analog high-definition transmission anti-attenuation device and method based on differential compensation

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Embodiment 1

[0028] A coaxial adaptive analog high-definition anti-attenuation device based on differential compensation, including:

[0029] The distortion information analysis module receives the coaxial control information sent back by the video receiving end through the coaxial cable, and analyzes it, adjusts the differential calculation control parameters and amplitude control parameters respectively according to the analyzed relevant information, and determines the differential delay unit Number d, determine the gain control amplitude and peak / valley value parameters, and pass it to the differential calculation and amplitude control module;

[0030] like figure 2 , 4 As shown, the difference calculation module includes a delay unit and an adder, and the data obtained after the original signal is processed by the delay unit is output to the adder together with the original signal to obtain the original compensation signal. According to the number of delay units, select the dth data...

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Abstract

The invention relates to a coaxial adaptive analog high-definition transmission anti-attenuation device and a method based on differential compensation. The device comprises a distortion information analysis module, a differential calculation module, an amplitude control module and a compensation signal superposition module. After original signals are processed through the differential calculation module, original compensation signals are obtained, the original compensation signals are then transmitted to the amplitude control module and are processed by the amplitude control module, compensation signals are then outputted to the compensation signal superposition module, the compensation signal superposition module superposes the compensation signals on the original signals, signals after compensation are fed to a coaxial line for transmission, the superposed compensation signals are used for cancelling distortion signals transmitted by the coaxial line, coaxial control signals are analyzed by the distortion information analysis module, the compensation degree is determined, differential control parameters are outputted to the differential module respectively, and amplitude control parameters are outputted to the amplitude control module.

Description

technical field [0001] The invention relates to an adaptive analog high-definition transmission anti-attenuation device, in particular to an anti-attenuation device for analog high-definition video transmission using a coaxial line with adaptive differential compensation, which reduces signal attenuation and distortion during ordinary coaxial line transmission The resulting decoding error belongs to the technical field of video transmission. Background technique [0002] The coaxial cable consists of four layers from the inside to the outside, which are the sheath, the outer conductor, the insulating medium and the inner conductor. The inner and outer conductors have resistance and inductance to the current flowing between them, and conductance and capacitance to the voltage between the conductors. These characteristics will cause attenuation and distortion of the signal when it is transmitted in the coaxial cable. In general, the attenuation constant of the coaxial cable i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/10
CPCH04N7/102
Inventor 何利蓉陈阳李成周晓亚
Owner 浙江芯劢微电子股份有限公司
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