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ts stream demultiplexing method

A demultiplexing and filter technology, applied in the field of TS demultiplexing, can solve problems such as interface call restrictions, and achieve the effect of fast speed and high efficiency

Active Publication Date: 2018-09-11
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a TS stream demultiplexing method to solve the problem that the interface provided by the demultiplexing module has call restrictions in the traditional digital TV receiver and in the software implementation of the digital TV receiver

Method used

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Embodiment

[0026] A filtering method in the prior art such as figure 1 As shown, the requested filter in the diagram is stored in 64 array elements. This type of filter is established with PID as the filter channel. Each PID can only occupy one channel. When a PID has requested , another request with the same PID will fail. The filter with PID 0 on the way has already been occupied in request 1. When request 2 requests to filter the data with PID 0 again, it will fail. In this way, when a TS packet comes, it is necessary to traverse the array sequentially, find the filter corresponding to the TS packet, and stop after finding it. In the figure, the TS packet with PID 0 arrives, and the filter with subscript 0 in the comparison array is not needed. After the filter with subscript 1 is matched successfully, the comparison is not performed afterwards.

[0027] Another way to filter such as figure 2 As shown, the filter requested in the illustration is stored in 64 array elements. This me...

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Abstract

The invention relates to a de-multiplexing method, solves a problem that an interface provided by a de-multiplexing module in the prior art has call limits, and provides a TS flow de-multiplexing method. According to the TS flow de-multiplexing method, firstly, filtering request information is received by a system, and a filter is generated according to the filtering request information; secondly, index table inlets of the filter are established by a system, and each inlet of the index table inlets respectively corresponds to one node; thirdly, a mapping relationship between each node and a filter address is established by the system; fourthly, the filter is called by the system to accomplish information filtering according to the filtering request information and the mapping relationship. Data of different PID packets and same PID packets are freely filtered, especially for avoiding conflicts generated when different software modules are utilized for filtering data of the same PID packets simultaneously, high efficiency and rapid speed are realized, and the TS flow de-multiplexing method is practical.

Description

technical field [0001] The invention relates to a digital television receiver, in particular to a TS demultiplexing method in the digital television receiver. Background technique [0002] In a digital TV receiver, various data received from the receiver, including channel audio and video, subtitles, program information, program preview, etc., are multiplexed in the TS (Transport Stream) stream, and the data is divided into fixed-length The data packet and the header are placed in the transport stream. Each block is called a TS packet. The size of the TS packet in the DVB (Digital Video Broadcasting) specification is 188 bytes. There is a PID (packet identifier) ​​in the fixed header. This identifier is used to distinguish different categories of data. Generally, different types of data have different PIDs, and the same type of data has the same PID. For example, the audio and video of a channel program use a PID for transmission. When using it, it is necessary to filter o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/434
CPCH04N21/434
Inventor 常吕伦张刚吴纯彬张雷鸣周志武
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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