Method for implementing edge broadcast of cable television VOD system

A video-on-demand and cable TV technology, applied in the transmission system, two-way working system, electrical components, etc., can solve problems such as increased cost and complex network topology, and achieve the effects of cost saving, simple transmission, and reduced complexity

Inactive Publication Date: 2008-09-24
北京东方广视科技股份有限公司
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Problems solved by technology

[0003] In the current existing technology, the video data of VOD (Video on-demand) video on demand is transmitted through DVB over IP technology, but because DVB over IP technology adopts a bidirectional transmission mode, it is bound to use a large number of optical fibers to complete the transmission , which will greatly increase the cost of investment, and the method of data transmission and network topology using DVB over IP technology are relatively complicated

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  • Method for implementing edge broadcast of cable television VOD system
  • Method for implementing edge broadcast of cable television VOD system

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0014] In the embodiment of the present invention, the channel of the Gigabit Ethernet network is divided into N logical digital TV network channels, each digital TV network channel can multiplex 8 to 10 channels of programs, and each EdgeQam (edge ​​modulator) can support 8, 16 or 24 channels, a broadcast server with a Gigabit Ethernet card can support 20 channels, and the transmission rate of each channel is 38Mbps, so an ordinary dual-core PC can support 200 concurrent programs. The broadcast server maps the 16-way Qam output chip selection on EdgeQam into logical digital TV network channels, as many EdgeQams can be mapped into as many logical digital TV network channels, and adds a MAC address for each logical digital TV network channel , according to the EdgeQAM protocol, on the chip select...

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Abstract

The invention discloses a method for realizing the marginal broadcasting of a cable TV video on demand system, which belongs to the cable TV field. In order to reduce the input cost for establishing VOD video on demand and satisfy the development of future digital TV, the invention provides the method for realizing the marginal broadcasting of the cable TV video on demand system, which includes: a broadcast server reads data flow files and packages the data flow files into ether-data frames; the broadcast server sends the ether-data frames to a marginal modulator through an Ethernet signal path; the marginal modulator receives the ether-data frames, analyzes the data flow files from the ether-data frames and modulates the data flow files into radio frequency signals to be sent to a fiber coaxial hybrid network.

Description

technical field [0001] The invention relates to the field of cable television, in particular to a method for realizing edge broadcasting of a video-on-demand system of cable television. Background technique [0002] At present, all countries in the world are implementing their own information superhighway plans to welcome the arrival of the information age in the new century. my country's radio and television is also undergoing the process of transforming from an analog system to a digital system, and the completed fiber optic cable trunk network between cities provides a technical guarantee for promoting the digitalization of radio and television. With its massive bandwidth and the advantages of connecting thousands of households, the radio network has become the main application network for realizing the digitization of radio and television. The digitization of broadcasting and television will provide a more convenient interface for the data transmission system. In the p...

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Application Information

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IPC IPC(8): H04N7/173H04N7/10H04L29/12H04N21/23
Inventor 张宝柱王晋豫徐卫东朱峰翁植林简远洋王丽妍
Owner 北京东方广视科技股份有限公司
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