Dual HD (high-definition) digital signal reception integrated circuit

Abstract

The invention provides a dual HD (high-definition) digital signal reception integrated circuit. According to the arrangement, by automatically analyzing attenuation of an input HD digital signal, a phase angle and again adjustment parameter are calculated, a related regulator circuit is controlled, frequency-band gains and the phase angle of the input signal are regulated, and signal attenuation caused by long-distance transmission is maximally recovered. In this way, debugging load is greatly reduced during construction, dependency of construction quality to quality and experience of debugging staff is decreased, and quality consistency of HD digital transmission construction is improved.

Description

technical field [0001] The invention relates to the field of high-definition digital transmission, in particular to a dual-type high-definition digital signal receiving integrated circuit. Background technique [0002] In traditional high-definition digital transmission projects, coaxial cables are used for long-distance high-definition digital signal transmission. As the price of wire rods continues to rise, the cost of wire rods accounts for an increasing proportion in the entire high-definition digital transmission system. The use of twisted pair to realize long-distance high-definition digital signal transmission has the advantages of convenient construction and economy, so there is a tendency to gradually replace coaxial cables. Unlike coaxial cables that transmit non-stationary signals, twisted-pair cables transmit stable signals. Therefore, in order to realize long-distance high-definition digital signal transmission, it is necessary to add a conversion device that c...

AI Technical Summary

Problems solved by technology

[0005] 1. During the installation process of the equipment on the project site, the installation conditions and construction environment vary greatly, the manual debugging workload is relatively large, and the labor cost is relatively high;

[0006] 2. Due to the difference in the experience and quality of the debugging personnel, and the project debugging results are mainly based on the subjective judgment of the debugging personnel, the transmission equipment may not be able to be debugged in the best state

Therefore, the quality of the project depends heavily on the quality and experience of the commissioning personnel, and the consistency of the project quality is poor;

[0007] 3. When the high-definition digital signal is transmitted over a long distance, both the sending end and the receiving end need to be adjusted manually, and the judgment standards of the debugging personnel are not uniform, so joint debugging is very difficult;

[0008] 4. In some occasions where it is necessary to frequently switch receiving channels of different lengths, such as the high-definition digital receiving end of visual building intercom, etc., it is impossible to manually adjust once each switching

However, at present, very few manufacturers use general-purpose components to design adaptive receiving equipment, which has problems of high cost, poor reliability, and low cost performance, so it is difficult to be widely used

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