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Method for implementing stunt mode function of transport stream file based on indexed file

A technology of indexing files and special effect modes, applied in the direction of pulse modulation TV signal transmission, special data processing applications, instruments, etc., can solve the problems of tens of seconds, or even a few minutes, which cannot be applied, and achieve short-time consumption and fast positioning , the effect of low algorithm complexity

Inactive Publication Date: 2011-02-23
CHINA HUALU GRP
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Problems solved by technology

This search algorithm will produce a large deviation: for a constant bit rate (CBR) file, the inherent audio and video data packets and other auxiliary data of the TS packet make this algorithm have a certain error; and for a variable bit rate (VBR) ) files, this method is even more inapplicable, and the time deviation will reach tens of seconds, or even several minutes

Method used

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  • Method for implementing stunt mode function of transport stream file based on indexed file
  • Method for implementing stunt mode function of transport stream file based on indexed file
  • Method for implementing stunt mode function of transport stream file based on indexed file

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Embodiment Construction

[0022] The method for realizing the Trickmodes function (search and positioning, fast forward / fast rewind) of the transport stream file by using the index file will be described in detail below in conjunction with the accompanying drawings and specific implementation.

[0023] Such as figure 1 Shown, in order to realize the object of the invention, the present invention designs following content:

[0024] 1. Need to find I-Frames data. Analyze the syntax structure of the TS stream system layer to obtain relevant information of the TS stream (bit rate, PSI information, frame rate, etc.); analyze the syntax structure of the video layer of the TS stream, and extract the relevant information of the frame (frame type (I / P / B frame), display timestamp (PTS), decoding timestamp (DTS, etc.), these information will be written into the head of the index file.

[0025] 2. Create an index file, that is, set up the index model of the system, write the display time stamp of each I frame an...

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Abstract

The invention discloses a method for implementing a stunt mode function of a transport stream file based on an indexed file. The method is characterized by comprising the following steps of: acquiring related information of a transport stream (TS) file, and writing the information in the head of the indexed file; creating an index descriptor; searching I frame data; acquiring position offset of the I frame data in a source file and a display time stamp of the frame, and generating the indexed file by combining the information; performing fast forward / fast reverse or positioning operation through the TS file; and closing the indexed file, and releasing a resource applied for. The method for implementing the stunt mode function of the transport stream file based on the indexed file has the advantages of lower algorithm complexity, shorter time consumption, capability of accurately positioning at a corresponding position in the TS file and the like. The method is suitable to be widely popularized in the field of videocast.

Description

technical field [0001] The invention relates to a method for realizing the special mode function of a transmission stream file based on an index file. Background technique [0002] Transport Stream (TS) is a data stream defined according to the ISO / IEC13818-2 and ISO / IEC13818-3 protocols. The transmission and storage of encoded data of one or more programs fully considers the complex and error-prone network environment, and has good fault tolerance. It is widely used in DVB, IPTV and other broadcasting systems, and has become the most important format of video broadcasting. [0003] The trick mode (Trickmodes) function refers to the realization of human-computer interaction operations such as fast forward / rewind and random access to the program. TS, a packaging format designed for broadcasting systems, is difficult to perform flexible human-computer interaction in on-demand systems. Usually, when fast forwarding / rewinding TS files to achieve multi-speed playback, the mode ...

Claims

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Application Information

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IPC IPC(8): H04N7/24G06F17/30
Inventor 朱兆勋陈宗圣李勇芦靖雷环利周良政
Owner CHINA HUALU GRP
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