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Live broadcasting method for digital interactive television

An interactive TV and digital technology, applied in TV, digital transmission system, electrical components, etc., can solve the problems of users' CableModem disconnection, affecting the normal transmission of uplink channel data signals, and TV program interruption, etc., so as to reduce the number of CMTS, Reduce the probability of dropped calls and reduce the effect of importing

Active Publication Date: 2010-10-20
GUANGZHOU DIGITAL MEDIA GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, after the Cable Modem is connected to the network, the uplink of the CMTS end is shared by a large number of users, making it in a complex electromagnetic wave environment full of interference factors such as household appliances, industrial appliances, and natural lightning. Like a huge mesh antenna, various interferences enter the channel through channels such as the user port / cable itself, seriously affecting the normal transmission of data signals on the uplink channel, and due to the increase in the number of users, when the on-demand service is congested, it will cause The user's Cable Modem is disconnected, which leads to the interruption of all TV programs. For the broadcast and television industry, the interruption of live programs is a problem that must be overcome.

Method used

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  • Live broadcasting method for digital interactive television
  • Live broadcasting method for digital interactive television
  • Live broadcasting method for digital interactive television

Examples

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example 1

[0017] Example 1, if the Cable Modem is in any state, the user switches from live channel 1 to live channel 9, then the Cable Modem needs to query the frequency IP table, and switch from frequency point A to frequency point B through Tuner2.

[0018] The entire workflow of switching live programs is as follows:

[0019] 1. The TV is playing channel 1, and the Cable Modem is on frequency A, and the user switches from channel 1 to channel 9 through the remote control;

[0020] 2. The set-top box sends a switching command to the Cable Modem;

[0021] 3. Cable Modem checks the frequency IP table after receiving the instruction, and finds that channel 9 is on frequency point B;

[0022] 4. Cable Modem switches from frequency point A to frequency point B through Tuner2;

[0023] 5. The Cable Modem (modem) receives the multicast stream data of channel 9 at the frequency point B of Tuner2, and bridges it to the set-top box.

[0024] Example 2: Cable Modem must go online normally, a...

example 3

[0031] Example 3: The Cable Modem is offline, the user cannot watch on-demand programs, and the user switches from on-demand to live channel 9, then the Cable Modem needs to query the frequency IP table to switch from Tuner1 to frequency point B of Tuner2.

[0032] The entire workflow of switching live programs is as follows:

[0033] 1. The TV is playing VOD, the Cable Modem is disconnected on Tuner1, and the user switches from the VOD channel to channel 9 through the remote control;

[0034] 2. The set-top box sends switching instructions to the Cable Modem;

[0035] 3. Cable Modem checks the frequency IP table after receiving the switching command, and finds that channel 9 is on frequency point B of Tuner2;

[0036] 4. Cable Modem switches from Tuner1 to Tuner2 and switches to frequency point B at the same time;

[0037] 5. The Cable Modem receives the multicast streaming data of channel 9 at the frequency point B of Tuner2, and bridges it to the set-top box.

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Abstract

The invention discloses a live broadcasting method for a digital interactive television. The whole network uses a single CMTS for live broadcasting service; each sub front-end CMTS is used for on-demand service; and after receiving instructions sent by a user, a Cable Modem seeks a downlink frequency corresponding to an IP address requested by the instructions according to a frequency IP list pre-storing the multicast IP address and the downlink frequency, locks the downlink frequency and bridges the data traffic to the user. The CMTS does not need to receive uplink data, and the Cable Modem directly finishes switch, so the convergence of various interference signals can be greatly reduced, the off-line probability of the Cable Modem can be reduced, the live broadcasting program still can be played normally during off line, and the stability of the live broadcasting program is ensured.

Description

technical field [0001] The invention relates to the field of digital interactive television, in particular to a live broadcast method of digital interactive television. Background technique [0002] With the development of technology and people's requirements for personalized TV programs, the on-demand service in digital interactive TV has been widely loved by viewers for its high interactivity. [0003] General digital interactive TV topology is generally as follows figure 1 shown. The sub-head end in the network adopts a CMTS (cable modem terminal system) as the shared broadcasting and on-demand. After the Cable Modem (cable modem) receives the user's viewing instruction, the CMTS uplinks and sends a request to the CMTS, and the CMTS downloads the request according to the request. Transmission of live data or on-demand data, after being demodulated by the Cable Modem, it is sent to the designated user according to the destination address of the instruction. Adopting thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/173H04L29/06
CPCH04N21/6168H04N21/2187H04L45/74H04N21/6405H04N21/2385H04N7/17309H04N21/6118H04L12/2801H04L12/2861
Inventor 王斌庄宜学徐力恒李建华凌俏峰杨涛
Owner GUANGZHOU DIGITAL MEDIA GRP CO LTD
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