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Multicast channel rapid switching system and method based on TCP

A fast switching and multicast technology, applied in the field of IPTV, can solve the problems that the set-top box cannot bear and increase the network burden of the box, and achieve the effect of eliminating the delay time of multicast reception, eliminating the waiting time of I frames and

Inactive Publication Date: 2020-05-01
UITV MEDIA TECH BEIJING
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  • Claims
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Problems solved by technology

Using the RTP / RTCP fast-cut communication protocol, the transmission traffic of up to 40-60M is unbearable for the set-top box. At this time, using packet loss and retransmission is tantamount to worsening the situation, and it will increase the network burden of the box.

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  • Multicast channel rapid switching system and method based on TCP
  • Multicast channel rapid switching system and method based on TCP
  • Multicast channel rapid switching system and method based on TCP

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Embodiment Construction

[0047] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0048] figure 1 For the fast switching system block diagram of multicast channel based on TCP according to the present invention, as figure 1 As shown, the TCP-based multicast channel fast switching system according to the present invention includes a multicast preprocessing forwarding server 10, a multicast fast switching cache server 20, and a multicast receiving client 30, wherein,

[0049] The multicast preprocessing and forwarding server 10 is responsible for receiving the source multicast signal, and preprocessing the received multicast channel data, so as to facilitate the quick identification of the multicast fast switching cache server 20 or the multicast r...

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Abstract

A multicast channel fast switching system based on a TCP comprises a multicast preprocessing forwarding server, a multicast fast switching cache server and a multicast receiving client, and the multicast preprocessing forwarding server receives information source multicast signals and preprocesses received multicast channel data; the multicast fast switching cache server identifies the initial position of the I frame of the multicast channel data, stores the video data in a corresponding storage unit and manages the video data; and the multicast receiving client combines and plays the video data acquired from the multicast fast switching cache server and the video data received by local multicast. The invention further provides a multicast channel rapid switching method based on the TCP, the I frame waiting time and the multicast receiving delay time are eliminated, meanwhile, enough playing starting data are prepared for the player, and the purpose of rapid channel switching is achieved.

Description

technical field [0001] The invention relates to the technical field of IPTV, in particular to a TCP-based multicast channel fast switching system and method. Background technique [0002] TCP is a connection-oriented protocol, that is to say, before sending and receiving data, a reliable connection must be established with the other party. UDP is a connectionless communication protocol. [0003] RTP is used to transmit real-time data in unicast or multicast networks. The main functions of RTCP are: monitoring and feedback of service quality, and synchronization between media. During an RTP session, RTCP packets are transmitted periodically. The RTCP packet contains statistics such as the number of data packets sent and the number of lost data packets. Therefore, the server can use this information to dynamically change the transmission rate or increase the retransmission mechanism. The combination of RTP and RTCP is a common mechanism for fast switching in the industry. R...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/231H04N21/234H04N21/438H04N21/6405H04N21/643H04N21/8547
CPCH04N21/23106H04N21/23406H04N21/4384H04N21/6405H04N21/643H04N21/8547
Inventor 轩美侠赵珂范长青
Owner UITV MEDIA TECH BEIJING
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