Method, apparatus and system for IP television channel switching processing

• Main Author: LI BINXUAN
• Format: Patent
• Language: Chinese; English
• Published: 19.01.2011
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention provides an Internet Protocol Television (IPTV) channel switching processing method comprising: receiving an Internet Group Management Protocol IGMP Leave message for asking for leaving a first channel; recording user information corresponding to the IGMP Leave message; receiving an IGMP Report message for asking for adding in a second channel; adding the user in a multicast group corresponding to the second channel according to the recorded user information, and generating a multicast list item corresponding to the second channel; recognizing and caching a first multicast copy flow corresponding to the second channel; deleting the multicast list item corresponding to the first channel; transmitting the first multicast copy flow by using a unicast mode; switching the flow toa multicast mode, transmitting a second multicast copy flow corresponding to the second channel by the multicast according to the multicast list item corresponding to the second channel. The method provided by the invention c