Method and apparatus for switching channel

A channel switching and post-switching technology, applied in the multimedia field, can solve the problem of slow channel switching, achieve fast channel switching, reduce equipment investment and maintenance costs

Inactive Publication Date: 2011-02-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the user switches channels, the access-side device uses IGMP (Internet Group Management Protocol: Internet Group Management Protocol) to join the new multicast group. It takes a long time from joining the multicast group to receiving the multicast stream at the terminal. time, channel switching is slow

Method used

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  • Method and apparatus for switching channel
  • Method and apparatus for switching channel

Examples

Experimental program
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Embodiment 1

[0017] Embodiment 1 Taking the user terminal as an STB (Set Top Box: set-top box) as an example, a method for realizing fast channel switching is described. The STB requests the GOP sequence to obtain the program data from the STB that has joined the multicast group to realize fast channel switching. The specific process is as follows: figure 1 ,Proceed as follows:

[0018] 101. When the user chooses to switch channels, the STB sends an IGMP Join message to the access device to apply for joining the multicast group corresponding to the live channel, assuming it is multicast group A.

[0019] 102. The access side device processes the IGMP Join message, and records multicast group A and the list of devices that have joined multicast group A.

[0020] 103. The access side device returns the above device list to the STB.

[0021] 104. The STB selects a device from the received device list, and sends a GOP sequence request message to it. It is assumed here that the STB selects...

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Abstract

The embodiment of the invention discloses a method for switching channels and a device thereof. The method comprises the following steps: a user terminal applies for admission of a switched multicast group to access side equipment; the user terminal receives an equipment list of the multicast group returned by the access side equipment; the user terminal transmits a group of picture GOP sequence request to the equipment in the equipment list; and the user terminal acquires the GOP sequence from the equipment in the equipment list. During channel switching, before a multicast flow reaches the user terminal, the user terminal can acquire program data from the request GOP sequence of other equipment joined in the multicast group, so as to solve the problem that new program data needs longer time to reach the user terminal during channel switching, thus realizing quick channel switching.

Description

technical field [0001] The embodiment of the present invention relates to the field of multimedia, and in particular to a channel switching method and device. Background technique [0002] IPTV (Internet Protocol Television: Interactive Network Television) is a new technology that uses broadband IP network to provide users with a variety of interactive services including live broadcast, on-demand and time-shifted TV. [0003] In the IPTV system, the transmission method of live programs is different from that of traditional cable TV and digital TV. In cable TV and digital TV systems, data of all programs are transmitted to the user terminal at the same time. When the user switches channels, the user terminal can receive new program data within a short time. In the IPTV system, in order to save the bandwidth of the IP backbone network, live programs are transmitted to the access side equipment through IP multicast, and only the program data that the user chooses to watch wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/18H04L12/56H04N7/173H04N7/26H04N21/2383H04N21/239H04N21/414H04N21/435H04N21/6405
Inventor 张宇
Owner HUAWEI TECH CO LTD
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