Main and standby code stream switching implementing device, method and system for mobile multimedia broadcast system

Abstract

The invention provides a main spare bit rate switching realizing apparatus, method and system of mobile multimedia broadcast system; the system comprises a main spare device, a spare device and a switcher; the main spare device inputs the main bit rate, the spare device inputs the spare bit rate to the switcher; the switcher takes the main spare bit rate input by the main device as the output bit rate; wherein, the switcher detects the main bit rate input by the main device; when the main bit rate is detected abnormal, the spare bit rate input by the main bit rate is switched as the output bit rate. The invention utilizes switcher to separately monitor the bit rate to realize the main spare proposal; the main spare switching function is realizing without communication holding between main device, spare device and the switcher. The invention reduces the time delay when switches the main spare input bit rate, thereby avoiding interpreting the bit rate transmission business long time running in the system.

Description

technical field [0001] The present invention relates to the main-standby switching technology in the mobile multimedia broadcasting system, in particular to the equipment, method and system for realizing the main-standby switching of PMS (Packaged Multiplexing Stream, packaged multiplexing stream) code stream input. Background technique [0002] At present, there are many mobile digital TV standards in the world, including T-DMB (Terrestrial-DigitalMultimedia Broadcasting, terrestrial digital multimedia broadcasting), DVB-H (Digital Video Broadcasting-Handheld, handheld digital video broadcasting), MediaFlo (Media Forward LinkOnly, only forward link), MBMS (Multimedia Broadcast / Multicast Service, Multimedia Broadcast Multicast Service), T-MMB (Terrestrial-Mobile Multimedia Handheld, Digital Multimedia Broadcasting - Ground / Handheld) and CMMB (China Mobile Multimedia Broadcasting, China Mobile Multimedia Broadcasting). With the current development of various technologies, th...

AI Technical Summary

Problems solved by technology

[0005] Although the above method can realize the switching between the main and backup devices, when the main device fails, the backup device detects the failure of the main device and notifies the switcher to make the PMS code stream switch input action. This process usually takes a long time. time

For the real-time mobile multimedia broadcasting system, the normal transmission of services will be affected for a long time, resulting in abnormal service information received by terminal equipment and affecting user experience.

[0006] At the same time, in the industry, most switchers realize the switching function by using ordinary electronic relays and RFRelays (Radio Frequency Relays, radio frequency switchers) to realize the switching of the main and backup two-way business. The biggest feature of the electronic relay is that it has no noise and low energy consumption. Small but also has its disadvantages, such as being susceptible to interference from non-control signals, the life of mechanical switching contacts is limited (for example: 100,000 times), and the time delay of electronic relay contact switching will cause the main and standby multiplexer stream input to switch incorrectly. Continuous, there is a gap in the code stream output by the switcher, such as figure 2 shown

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