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Signal reverse transmission system and method used for sharing-cable integrated services digital network

A technology of reverse transmission and forward transmission, applied in cable transmission adaptation, telephone communication, time division multiplexing selection device, etc., can solve the problem of high bit error rate, achieve low bit error rate, stable signal, overcome error The effect of higher bit rate

Inactive Publication Date: 2010-02-10
郭松
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  • Claims
  • Application Information

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Problems solved by technology

[0011] The present invention aims to provide a signal reverse transmission system and method for common cable one-to-one communication, which can solve the problem of high bit error rate in the existing reverse transmission technology

Method used

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  • Signal reverse transmission system and method used for sharing-cable integrated services digital network
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  • Signal reverse transmission system and method used for sharing-cable integrated services digital network

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0033] figure 2 It shows a schematic diagram of a signal reverse transmission system for co-cable one-to-one communication according to an embodiment of the present invention, including:

[0034] The reverse signal inserter 10 is used to reversely transmit the low-frequency signal of DC level from the control terminal to the coaxial cable, and at the same time prevent the high-frequency signal from the coaxial cable from feeding back to the control terminal, and prevent the low-frequency signal from entering for demodulation Co-cable one-way demodulator for high-frequency signals;

[0035] The coaxial cable 30 is used for reverse transmission of low frequency signals and forward transmission of high frequency signals;

[0036] The reverse signal restorer 20 is used to read the low-frequency signal from the low-frequency channel of...

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Abstract

The invention provides a signal reverse transmission system and a method used for a sharing-cable integrated services digital network. The system comprises a reverse signal inserter used for reverselytransmitting a low frequency signal of a direct current level from a control end to a coaxial cable, at the same time, preventing a high frequency signal from the coaxial cable from feeding back to the control end, and preventing the low frequency signal from entering a sharing-cable integrated service digital network demodulator for demodulating the high frequency signal; a coaxial cable used for reversely transmitting the low frequency signal and forwards transmitting the high frequency signal; and a reverse signal reductor used for reading the low frequency signal from a low frequency channel of the coaxial cable to feed back to front-end equipment, at the same time, preventing the low frequency from entering the sharing-cable integrated service digital network modulator for modulatingthe high frequency signal, and allowing the high frequency to be forwards transmitted to the coaxial cable. The system and the method overcome the defects that the prior reverse transmission technology has a high error rate, and realize the reverse transmission effect with stable signal and low error rate in the sharing-cable integrated services digital network.

Description

technical field [0001] The present invention relates to a common cable one-way communication, in particular, to a signal reverse transmission system and method for a common cable one-way communication. Background technique [0002] The common cable one-communication transmission technology originates from the cable TV technology and has been used in the monitoring industry for many years. Co-cable one-to-one communication usually uses a 75-ohm coaxial cable, and its bandwidth is 0-1GHz. The video signal output by the camera is 0-6MHz, and the audio signal is 0-20KHz. Modulate the audio and video signals to the frequency band above 49.75MHz-860MHz, and each 8MHz bandwidth can modulate 1 channel of audio and video signals. Usually transmits 16 channels of audio and video signals, and the product is the most cost-effective. Audio and video modulation signals usually occupy the 49.75-860MHz high-frequency channel. The high-frequency signals of different frequency bands should ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/04H04M11/06H04N7/10
Inventor 邓辉郭松
Owner 郭松
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