Transmission stream remultiplexing method

A transport stream and re-multiplexing technology, applied in the direction of pulse modulated television signal transmission, television, electrical components, etc., can solve the problems of buffer overflow of the receiver decoder, poor portability, and complicated re-multiplexing methods, etc. The scheme is simple and flexible, avoids decoder overflow, and increases the effect of channel utilization

Inactive Publication Date: 2009-05-06
SHANGHAI UNIV
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Problems solved by technology

[0003] At present, there are many devices or methods for multiplexing multiple single-program transport streams into one multi-program transport stream, but they generally have one or more of the following problems: implemented by hardware, poor portability and high cost; The combination of reuse and re-multiplexing cannot

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  • Transmission stream remultiplexing method

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[0024] Below in conjunction with accompanying drawing and embodiment the present invention is further described: as figure 1 , figure 2 , image 3 As shown, using a transport stream re-multiplexing method provided by the present invention, six single-program transport streams with an actual maximum code rate of 5-6 Mbps are multiplexed into one multi-program transport stream with a constant transmission rate of 38 Mbps.

[0025] Step 1, such as figure 1 As shown. Some buffer areas and counters are initialized; the special program information PSI, service information SI, and maximum transmission bit rate of each input single-program transport stream are statistically obtained. If the output transport stream rate is less than the sum of the maximum bit rate of each input single program transport stream, then warn and exit.

[0026] Step 2. According to the special program information PSI and service information SI of each input single-program transport stream obtained in ste...

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Abstract

The present invention relates to a transport stream re-multiplexing method, which re-multiplexes multi-input single-program transport stream into a multi-program transport stream for outputting. The method includes: first of all, reconfiguring the program specific information PSI and service information SI of the output transport stream according to counted program specific information PSI and service information SI of the input transport stream; secondly, dynamically uniformly and interlacedly outputting the valid data and empty packets of each transport stream according to the rate of the output transport stream; and substituting the empty packets in a certain interval into the program specific information PSI and service information SI. The invention only differentially tunes the original PCR rather than rewriting the PCR value.

Description

technical field [0001] The invention belongs to the field of digital television transmission, and in particular relates to a transmission stream remultiplexing method. Background technique [0002] In the process of digital TV transmission, in order to make full use of spectrum resources, multiple channels of digital TV programs are often transmitted in one analog physical channel. Therefore, multiple single-program transport streams need to be multiplexed into one multi-program transport stream for easy transmission. [0003] At present, there are many devices or methods for multiplexing multiple single-program transport streams into one multi-program transport stream, but they generally have one or more of the following problems: implemented by hardware, poor portability and high cost; The combination of reuse and re-multiplexing cannot be applied to the occasion of re-multiplexing multiple multiplexed single-program transport streams; the re-multiplexing method is compli...

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Application Information

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IPC IPC(8): H04N7/54H04N7/26H04N21/2389H04N21/434
Inventor 郑启盛朱民耀郭健王亚萍
Owner SHANGHAI UNIV
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