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IPTV channel switching method and apparatus thereof

A channel switching and channel technology, applied in the field of communication, can solve the problems of increasing delay and inability to eliminate it, and achieve the effect of reducing the influence of delay and speeding up the switching speed.

Inactive Publication Date: 2011-11-02
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, there is a delay between the client and the live media stream data, and this delay increases with the increase of the cache and cannot be eliminated

Method used

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  • IPTV channel switching method and apparatus thereof
  • IPTV channel switching method and apparatus thereof
  • IPTV channel switching method and apparatus thereof

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Embodiment Construction

[0036] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] refer to figure 1 , propose an embodiment of the method for IPTV channel switching of the present invention, including:

[0038] Step S10, cache the media stream data of each IPTV channel sent by the program source;

[0039] Step S11, extracting PAT and PMT of each IPTV channel;

[0040] Step S12, when receiving the multicast group joining message from the client, sending the PAT and PMT corresponding to the multicast group joining message to the client;

[0041] Step S13 , sending the buffered media stream data of the IPTV channel corresponding to the multicast group joining message to the client.

[0042] Receive the media data streams of all IPTV channels that are broadcast live, cache the media data streams, identify the key information in them, and cache the PAT and PMT separately.

[0043] When receiv...

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Abstract

The invention reveals an IPTV channel switching method. The method comprises the following steps: buffering media stream data of all IPTV channels, wherein the data are sent by a program source; extracting program associate tables (PATs) and program mapping tables (PMTs) of the all IPTV channels; sending a PAT and a PMT to a client after reception of an added message of a multicast group of the client, wherein the PAT and the PMT correspond to the added message of the multicast group; and sending the buffered media stream data of the IPTV channel to the client, wherein the IPTV channel corresponds to the added message of the multicast group. Besides, the invention also provides a corresponding apparatus. According to the IPTV channel switching method and the apparatus thereof provided in the invention, a switching speed of the IPTV channel is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for IPTV channel switching. Background technique [0002] With the popularity of network applications, IPTV applications have been widely recognized. However, an important problem that plagues operators and users is the slow switching speed of IPTV channels. The switching speed of the existing IPTV system cannot be compared with the traditional cable TV. Therefore, improving the speed of IPTV channel switching becomes an important concern. [0003] The existing IPTV system uses multicast as the basic transmission technology. Channel switching is done by clients sending multicast leave and join. In the process of channel switching, the reasons for the slow switching speed include the processing time of multicast leaving and joining, the time for obtaining key information on the client, and the network transmission delay. The above key information refers t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/238H04N21/231H04N21/24
CPCH04N21/6125H04N21/26616H04N21/2401H04N21/2408H04N21/6175H04N21/23106
Inventor 曹亚林黎定军
Owner ZTE CORP
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