Channel switching accelerating method and channel ethnic group marking method in video multicast network system

A channel switching and network system technology, which is applied in the field of channel switching acceleration in video multicast network systems, can solve problems such as inability to adapt to large-scale deployment, skyrocketing network traffic, and high resource consumption, so as to improve user experience, smooth transition, and adaptability good sex effect

Inactive Publication Date: 2014-10-08
INST OF SOFTWARE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The above methods often cannot meet the needs of large-scale deployment, or consu...

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  • Channel switching accelerating method and channel ethnic group marking method in video multicast network system
  • Channel switching accelerating method and channel ethnic group marking method in video multicast network system
  • Channel switching accelerating method and channel ethnic group marking method in video multicast network system

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Embodiment Construction

[0028] The community video delivery network that supports multicast includes video multicast servers (that is, video program source servers with disk arrays), smart switches, video playback terminals and other conventional equipment, as well as dedicated servers for channel acceleration. There are acceleration modules on switches and terminals. Network topology relationship see figure 1 , figure 1 The mid-edge switch is an intelligent switch directly connected to the video playback terminal, and the core switch is directly connected to the video multicast server. This terminal refers to a video playback terminal that needs to switch channels. The neighboring terminal is playing the same channel as the channel to be switched by the terminal, and is relatively close to the terminal on the network topology connection.

[0029] When the channel is switched, the current GOP image frame data is likely to be incomplete. The acceleration module asks for expired streaming media data fr...

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Abstract

The invention relates to a channel switching accelerating method and a channel ethnic group marking method in a video multicast network system. The channel switching accelerating method includes the steps of frame interpolation, rebound, construction and transmission in advance. A user sends out a switching request, and a terminal informs a switch of joining in a corresponding multicast group; an accelerating module executes corresponding actions according to the position or the operation stage, where a current image frame is located, of a group of video pictures (GOP); in the front part of the GOP, overdue frames are supplemented to be complete; in the front middle of the GOP, only reference frames are recalled; in the rear middle of the GOP, new I frames are constructed; in the tail of the COP, transmission is performed in advance. In addition, keys on a terminal control panel are not increased, one certain key or a certain group of keys are defined to have different functions under different states, and the operation functions of channel ethnic group marking and scanning type automatic switching in groups are achieved. Channel switching of video multicast can be accelerated, the possibility of jamming of the backbone network is lowered, and instant large fluctuations of network flow are avoided.

Description

Technical field [0001] The present invention relates to network video transmission technology, under the video transmission environment of IP network, such as online live broadcast, network TV, video conference and other information service fields, and specifically relates to a method for accelerating channel switching in a video multicast network system. Background technique [0002] In the IP network, multimedia services are increasing day by day, and the efficient transmission of network video has gradually become a research focus. Zhang Hongke from Beijing Jiaotong University proposed that a smart collaborative network can improve network resource utilization, reduce network energy consumption, and improve user experience. In the community broadband network, IP multicast technology effectively solves the problem of single-point sending and multi-point receiving, and realizes point-to-multipoint efficient data transmission, which can save network bandwidth and reduce server lo...

Claims

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Application Information

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IPC IPC(8): H04N21/44H04N21/234H04N21/43H04N21/61H04N21/6405
Inventor 方贵明石志强乔元松程冬超王均
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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