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Transmission flow demultiplexing apparatus and method

A transport stream and demultiplexing technology, applied in transmission systems, digital transmission systems, multiplexing communications, etc., can solve the problems of wasting data bus bandwidth and aggravating the burden of data processing, so as to reduce the burden of data processing and save the bus Bandwidth, the effect of reducing data

Inactive Publication Date: 2007-12-05
VIMICRO CORP
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In this way, the transmission of these useless data wastes the data bus bandwidth and increases the data processing burden of the CPU.

Method used

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  • Transmission flow demultiplexing apparatus and method
  • Transmission flow demultiplexing apparatus and method

Examples

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Embodiment Construction

[0052]As shown in Figure 2, the transport stream demultiplexing device of the present invention includes: a configuration module configured to configure an identification mark for a comparator; a register for receiving a transport stream; a comparator with an input terminal connected to the register for extracting The identification of the data packet in the transport stream; the other input is connected to the configuration module for receiving the identification; the input of the counter is connected to the input of the register, and its output is connected to the comparator, It is used to count the number of bytes received by the register, and when the number of bytes received by the register reaches the preset value, the comparator is controlled to work; the comparator compares whether the identification mark in the transport stream packet and the configured identification mark are Equal, if they are equal, the data packet is a valid data packet, otherwise it is an invalid ...

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Abstract

This invention solves the problem of wasting the bus bandwidth in existing de-multiplexing of transfer flow. It (1) draws and displays the program relation table from the received transfer flow and (2) obtains the identification sign (IS) of the video flow data package (VFDP) or IS of the audio flow data package (AFDP) according to the program number input by users. (3) When IS of AFDP drawn from the register is coincident with IS of AFDP received from the program number processor (PNP), it admits the former as an effective data package (EDP). Similarly when IS of VFDP drawn from the register is coincident with the one received from PNP, it admits the former as EDP. Due to drawing EDP from the input transfer flow, this invention rejects numerous useless data packages, reduces lot data processed by the software and saves the bus bandwidth resource.

Description

technical field [0001] The invention relates to a transmission stream demultiplexing device and method. Background technique [0002] The data of the digital television broadcasting are usually multiplexed in the transport stream (Ts: transport stream). The so-called transmission stream is a continuous data sequence composed of data transmission packets with a fixed length of 188 bytes, of which the first 4 bytes are the packet header, and the 184 bytes after the packet header are useful data; if the useful data is not long enough, insert it in the middle An adaptation region complements an incomplete Transport Stream. Among them, the 4 bytes of the header are 32Bit in total, the first 8Bit is the synchronization byte, then 1Bit is the transmission error indication, then 1Bit is the payload unit start indication, then 1Bit is the priority transmission flag, the next 13Bit is the PID program number, and then 2Bit is Transmission interleaving identifier, the next 1Bit is the...

Claims

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Application Information

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IPC IPC(8): H04N7/52H04L12/56H04J3/16
Inventor 戴春泉
Owner VIMICRO CORP
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