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Push VOD (Video-On-Demand) system of digital television and push VOD method thereof

A digital TV and on-demand system technology, applied in the direction of electrical components, image communication, selective content distribution, etc., can solve the problems of occupying large bandwidth resources and low efficiency, achieve small broadcast bandwidth, improve network resource utilization, and improve user The effect of quality of experience

Active Publication Date: 2013-07-31
CATON TECH SHANGHAI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development and popularization of PUSH-VOD technology, PUSH-VOD technology has also begun to be applied to various two-way networks. problem mechanism) defects began to emerge
In the traditional PUSH-VOD system, it is necessary to repeatedly push all the content to ensure a high average acceptance rate of the terminal, so it needs to occupy a large amount of bandwidth resources, resulting in low efficiency

Method used

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  • Push VOD (Video-On-Demand) system of digital television and push VOD method thereof
  • Push VOD (Video-On-Demand) system of digital television and push VOD method thereof
  • Push VOD (Video-On-Demand) system of digital television and push VOD method thereof

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Embodiment 1

[0063] According to Embodiment 1 of the present invention, a PUSH-VOD system is provided. image 3 The physical structure of the PUSH-VOD system of this embodiment is shown, and the PUSH-VOD system includes a head-end system, a terminal system and supplementary auxiliary equipment (ie image 3 second edge server in ). The head-end system includes a central server, a multiplexer, a modulator and a first edge server. End systems include antenna receivers, set-top boxes, and display devices (such as televisions). There is a broadcast link (in this embodiment a satellite link) between the central server and the set top box. Both the first and second edge servers and the set-top box are connected to the Internet.

[0064] Wherein, a push server (the push server may be a software module) is deployed on the central server, and Windows 2003 server operating system is installed on the central server. A seed server is deployed on the first edge server (the seed server can be a softw...

Embodiment 2

[0080] According to Embodiment 2 of the present invention, there is provided a push-on-demand method based on the push system of Embodiment 1, the method comprising the following steps:

[0081] 1) At the beginning of the push, the seed server obtains a complete copy of the content file, and calculates the corresponding seed file and sends it back to the push server. The push server also compiles the seed file into the push plan.

[0082] 2) The head end uses the broadcast channel to periodically broadcast push information files to the terminals. The format of the push information files has been introduced in Embodiment 1, and will not be repeated here. In the push information file, each content file corresponds to The initial value of the P2P field of the node is 0.

[0083] 3) The head end uses the broadcast channel to broadcast the content file and the seed file corresponding to the content file to the terminal in the push cycle. To ensure reliability, in this em...

Embodiment 3

[0093] In Embodiment 1, all lost data blocks are supplemented by P2P mode, which can effectively reduce the occupation of the broadcast channel by the system. However, this supplementary mode occupies a relatively large Internet network. Therefore, the present invention also provides another supplementary packet solution to further improve the PUSH-VOD system in Embodiment 1.

[0094] In practice, it is found that in the PUSH-VOD system, the acceptance rates of all terminals in a geographically adjacent area are basically the same, and the sequence numbers of packet loss are also very similar. Broadcasting is still the most efficient way to deal with similar packet loss, so this similarity can be used to re-push the most densely lost data blocks by using a small additional broadcast link bandwidth to achieve more Efficient secondary push, thereby greatly reducing the occupation of Internet bandwidth.

[0095] According to Embodiment 3 of the present invention, a PUSH-VO...

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Abstract

The invention provides a push VOD (Video-On-Demand) system of a digital television. The system comprises a headend system and a terminal system, wherein a broadcast link is arranged between the headend system and the terminal system, the headend system and the terminal system are both accessed to a computer network, the headend system is used to push documents to the terminal system through the broadcast link, and the terminal system is used to receive the documents pushed by the headend system and acquire lost data packets in the received pushed documents through the computer network. The invention also provides a push VOD method of a digital television correspondingly. The system provided by the invention occupies less extra bandwidth and saves the limited bandwidth resources of satellites, wired or terrestrial broadcasting. According to the invention, an extra occupation of the network resources is very limited so the overall utilization of the network resources can be effectively improved by using a PUSH-VOD technology.

Description

technical field [0001] The present invention relates to the technical field of digital television broadcasting. Specifically, the present invention relates to a digital television push-on-demand system and a push-on-demand method thereof. Background technique [0002] Push-on-demand technology (PUSH-VOD technology) in the field of digital TV is a technology that uses a small amount of resources for broadcast pre-push service, and pushes hot resources that users care about during off-peak hours. It can be used to solve the problems that the traditional VOD technology occupies a large amount of bandwidth resources, and the head-end deployment is very expensive and wasteful. PUSH-VOD technology is to push a large amount of audio, video, files, pictures and other data content to all users' local terminals at the same time in the form of broadcasting in a concentrated period of time, so that when users actually perform on-demand operations, the system only needs to be in the The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/63H04N21/254H04N21/266
Inventor 黄雷杜俊峰
Owner CATON TECH SHANGHAI LTD
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