A device and method for selecting and outputting packaged and multiplexed code streams

A technology for selecting output and code stream, which is applied in selective content distribution, image communication, digital video signal modification, etc. It can solve the problems of service interruption of subsequent equipment, inability to select the delay difference, etc., and achieve the effect of reducing the possibility

Active Publication Date: 2012-02-08
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multiplexer outputs the ASI code stream and sends it directly to subsequent devices (such as modulators, network adapters, etc.), without strict control of the output, especially in the presence of multiple ASI code streams, it is impossible to choose the minimum delay difference The output mode with the best quality or the output mode with the best quality will easily cause the business interruption of the subsequent equipment

Method used

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  • A device and method for selecting and outputting packaged and multiplexed code streams
  • A device and method for selecting and outputting packaged and multiplexed code streams
  • A device and method for selecting and outputting packaged and multiplexed code streams

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Embodiment Construction

[0028] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0029] The core idea of ​​the present invention is to provide a device and method for selecting and outputting packaged and multiplexed code streams, so as to realize the selective output of multiple PMS code streams and reduce the possibility of service interruption of subsequent equipment.

[0030] see figure 1 as shown, figure 1 It is a functional block diagram of a device for selecting and outputting packetized and multiplexed code streams provided by an embodiment of the present invention.

[0031] In the embodiment of the present invention, the device includes a codec unit, a processing unit and an electronic relay, and the codec unit is a Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), which is connected with the processing unit for asynchronous input Perform 8b / 10b decoding on the serial code stream,...

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Abstract

A device and method for selectively outputting packaged multiplexing stream (PMS) are disclosed in the present invention. The method comprises: a codec unit decodes the inputted asynchronous serial interface (ASI) streams, obtains multiple PMSs by parsing, checks the abnormality of the packet header information of the PMSs, and sends the abnormality-checking result and the multiplex frames obtained by parsing to a processing unit; the processing unit parses the multiplex frames of the PMS; and the codec unit receives the multiplex frames which are parsed by the processing unit and would be sent out, encapsulates them into a PMS and encodes the PMS, and sends the encoding result to the output ASI; or the ASI stream with the best quality is selected and directly sent to the output ASI. The method and device in the present invention enable the selective output of multiple PMSs, and reduce the probability of the back-end device's service breaking off.

Description

technical field [0001] The invention belongs to the technical field of mobile multimedia broadcasting, and in particular relates to a device and method for selecting and outputting packaged and multiplexed code streams. Background technique [0002] In the mobile multimedia broadcast front-end system, the 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. In order to be compatible with existing network transmission equipment, the code stream output of the multiplexer adopts an asynchronous serial interface (Asynchronous Serial Interface, ASI). A code stream (Packaged Multiplexing Stream, PMS), the payload of the PMS is a multiplexed frame. PMS is a data protocol between a China Mobile Multimedia Broadcasting (CMMB) multiplexer and subsequent devices (such as modulators, network adapters, etc.). The mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/236H04N21/647H04N19/89
CPCH04N21/236
Inventor 朱剑平肖金锽张迪强
Owner ZTE CORP
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