Selected output device of packaging multiplexing code stream and method thereof

A technology that selects output and code stream. It is used in selective content distribution, pulse modulation TV signal transmission, TV and other directions. It can solve the problems of service interruption of post-level equipment and inability to choose the most delay difference, and achieve the effect of reducing the possibility.

Active Publication Date: 2010-03-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • 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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  • Selected output device of packaging multiplexing code stream and method thereof
  • Selected output device of packaging multiplexing code stream and method thereof
  • Selected output device of packaging multiplexing code stream and method thereof

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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

The invention discloses a selected output device of a packaging multiplexing code stream, which comprises an encoding/decoding unit and a processing unit, wherein the encoding/decoding unit is connected with the processing unit and is used for conducting 8b/10b decoding on input asynchronous serial code streams, resolving out a plurality of paths of packaging multiplexing code streams and conducting abnormality test on 16 bytes of package header information in 188 bytes of the packaging multiplexing code streams; multiplexing frames analyzed by the processing unit are received and packaged into a packaging multiplexing code stream with 188 bytes for 8b/10b encoding, then the encoded stream is sent to an asynchronous serial output interface, or the path of the packaging multiplexing code stream with the optimal quality is selected for being directly sent to the asynchronous serial output interface; and the processing unit is connected with the encoding/decoding unit and used for gradingfor analysis of all paths of multiplexing frames and quality of service. The invention also discloses a selected output method of packaging multiplexing code stream. The invention realizes the selected output of multiple paths of PMS code streams, and reduces the possibility of interruption of service of backward-stage equipment.

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 Applications(China)
IPC IPC(8): H04N7/52H04N7/64H04N19/89
CPCH04N21/236
Inventor 朱剑平肖金锽张迪强
Owner ZTE CORP
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