A switcher and method for selecting and outputting multiple signals

A technology of selective output and multi-channel signal, applied in the direction of selective content distribution, image communication, electrical components, etc., can solve the hidden danger of link stability, affect the stability of the multimedia broadcasting system, and affect the use of the multimedia broadcasting system by users. , to achieve the effect of improving stability and user experience

Active Publication Date: 2011-12-28
ZTE CORP
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Problems solved by technology

[0003] This link has a large stability risk. Once the front-end multiplexer is abnormal (such as abnormal power failure, PMS code stream data packaging abnormality, etc.), it will seriously affect the stability of the entire multimedia broadcasting system, thereby affecting the user's understanding of the multimedia broadcasting system. Use of broadcasting system

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  • A switcher and method for selecting and outputting multiple signals
  • A switcher and method for selecting and outputting multiple signals
  • A switcher and method for selecting and outputting multiple signals

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Embodiment Construction

[0064] The present invention provides a switcher and a method for selectively outputting multi-channel signals. In the mobile multimedia broadcasting front-end system, the position of the switcher device is as follows: figure 2 As shown, the quality analysis can be performed on the received multiple ASI code streams and the signal with better quality can be output to the modulator.

[0065] In order to be compatible with existing network transmission equipment, multiplexers, switches, and modulators use ASI (Asynchronous Serial Interface) interfaces for code stream interaction. ASI interfaces use non-DC balanced encoding (8b / 10b). The load is PMS (Packaged Multiplexing Stream), and the payload of the PMS is a multiplexing frame.

[0066] This embodiment provides a switcher for selecting and outputting multiple signals, such as image 3 As shown, it includes n code stream receiving modules, which are respectively recorded as code stream receiving module 1, code stream receivi...

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Abstract

The invention provides a switch and method for selectively outputting multiple signals. The method comprises the following steps of: making the switch receive multiple asynchronous serial interface (ASI) code streams; when the switch works in the field programmable gate array (FPGA) routing path mode, performing signal analysis on each received code stream; and outputting one of the ASI code streams serving as an output code stream to a modulator according to a preset rule. Due to the adoption of the technical scheme of the invention, the multiple received ASI code streams can be subjected to signal analysis, an ASI code stream with a better signal is selected for outputting, and the stability and user experience of a mobile multimedia broadcast system are improved; and a user-configurable switching strategy interface is provided, so that the user can combine a switching strategy which can meet the customer requirement to the maximum extent according to the practical service environment of the equipment.

Description

technical field [0001] The invention relates to the field of mobile multimedia broadcasting, in particular to a switcher and a method for selectively outputting multi-channel signals. Background technique [0002] Existing mobile multimedia broadcast front-end systems such as figure 1 As shown, the program content sends the audio and video data of multiple programs to the multiplexer through the network port, and the multiplexer uniformly packages the program data into a PMS code stream and sends it to the next-level modulator. The main function of the multiplexer is to complete the encapsulation of audio, video, data, electronic service guide, emergency broadcast and other information so that it can be transmitted on the mobile multimedia broadcast channel. The modulator mainly completes the transmission of the PMS code stream conforming to the multimedia broadcasting system. [0003] This link has a large stability risk. Once the front-end multiplexer is abnormal (such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/236H04N21/647
CPCH04N21/236
Inventor 张迪强
Owner ZTE CORP
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