Video-frequency data transmission system and method based on E1 interface

A technology of video data transmission and data, which is applied in the field of data transmission, can solve problems such as increase and image quality degradation, and achieve the effect of improving transmission quality

Active Publication Date: 2009-07-01
保定市天河电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a video data transmission system and method based on the E1 interface. quality loss problem

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  • Video-frequency data transmission system and method based on E1 interface
  • Video-frequency data transmission system and method based on E1 interface
  • Video-frequency data transmission system and method based on E1 interface

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Embodiment Construction

[0056] The core of the present invention is to flexibly insert the compressed audio and video data into several time slot groups on the E1 line dynamically through the time slot multiplexing technology according to the needs of the user or the system, and then through the tandem cross-connection technology, the Audio data and video data are separated from corresponding time slot groups, reassembled, and sent to respective decoding units for corresponding processing. That is to say, the object controlled by the present invention is the most basic communication unit of E1 line transmission, i.e. time slot, and the forwarding delay between each node is fixed. A fixed buffer of E1 frames (namely 125 microseconds) is added to the interface. Even after multi-stage forwarding, the transmission delay remains unchanged, thus ensuring the transmission quality of audio and video data. It can be seen that the present invention solves the problem of increasing the transmission delay due to...

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Abstract

The invention relates to a video data transmission system based on an E1 interface. The system at least includes: a data signal acquisition unit, an E1 transmission signal line, a data signal monitoring unit; an E1 / IP converter, a controller, and a multifunctional data multiplexer and data cross-connect device, wherein the multifunctional data multiplexer is used to multiplex the data of multiple interfaces to the E1 interface; the E1 / IP converter is used to complete the conversion of IP data and parallel port data ; The main controller is used to realize the control of the whole site and the two-way communication of the backstage equipment; the data cross-connection device is used to realize the fully transparent cross-connection with unlimited blocking of time slots between multiple E1 circuits. The invention also provides a video data transmission method based on the E1 interface. By adopting the communication technology of time slot multiplexing and cross-connection, the problem of image quality degradation caused by the increase of network transmission delay is solved.

Description

technical field [0001] The present invention relates to data transmission technology, specifically, to a video data transmission system and method based on E1 interface. Background technique [0002] At present, in the transmission technology, especially in the application of the railway system, an E1 line is usually used to transmit compressed audio and video data, and the E1 line is a line connected to an E1 interface (also known as a 2M interface). Described E1 line is connected with router or network bridge, is about to convert the wide area network transmission of E1 into pure IP network, and the transmission of described audio and video data is realized by router or network bridge, and audio and video encoder and decoder just all Can be in the IP network to facilitate data transmission. However, the networking technology of the pure IP network is to send the mixed audio and video data of the terminal through a router or a bridge at the same time, and in the transmissi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/24H04J3/00H04L5/00
Inventor 高铁军冯升张华胜谢飒
Owner 保定市天河电子技术有限公司
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