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Method for controlling and adjusting for circulating play transfer flow

A technology of cyclic playback and transmission stream, which is applied in parts of color TV, parts of TV system, high-definition TV system, etc. full effect

Inactive Publication Date: 2006-09-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When using the existing technology to play audio / video transport streams in a loop, there are generally problems such as picture damage, jitter, and out-of-sync at the beginning and end links of loop playback, which affect the image and sound quality.

Method used

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  • Method for controlling and adjusting for circulating play transfer flow
  • Method for controlling and adjusting for circulating play transfer flow
  • Method for controlling and adjusting for circulating play transfer flow

Examples

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing and embodiment, further illustrate the present invention.

[0029] figure 1 is the distribution of the PCR field value of the data packet program clock reference, and its value is calculated according to the linear growth of the transport stream TS data packet.

[0030] figure 2 Decodes timestamps for a video stream and displays the distribution of timestamp values. As the packet number increases, the decoding time stamp DTS value of the video stream is calculated according to the same increase, and the display time stamp PTS value is calculated according to the step change shown in the figure. figure 2 The average rate of change of the decoded time stamp DTS, displayed time stamp PTS values ​​and figure 1 The average rate of change of the program clock reference PCR is shown to be the same.

[0031] image 3 It is the distribution of audio / video stream program clock reference PCR and decoding time stamp DTS values. ...

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PUM

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Abstract

The present invention is a method for controlling and adjusting the cycle-broadcast transmitted flow. The method relates to the case in which the cycle-broadcast transmitted flow is controlled and adjusting, specifically to the case in which the cycle-broadcast audio / video transmitted flow is controlled and adjusted. In order to provide a synchronous and stable cycle-broadcast transmitted flow with the images being intact at the linkage between last ends and next heads of the images, the invention adopts such technical solution; finding out a head of the first image group, removing its preceding section, setting up a state in which the decoder does not decode B frame following closely I frame in the image group, finding out in a reverse direction the head of the first image in the image group.

Description

technical field [0001] The present invention relates to the occasion of controlling and adjusting the transmission stream which is cyclically played, in particular to the occasion of controlling and adjusting the transmission stream containing audio / video information which is cyclically played. Background technique [0002] When the existing technology is used to loop the audio / video transport stream, there are common problems such as picture damage, jitter, and out-of-sync at the beginning and end links of the loop playback, thus affecting the quality of the image and sound. Contents of the invention [0003] In order to overcome the deficiencies in the prior art and provide a complete, continuous, smooth, synchronous and stable loop playback transmission stream at the head and tail links, the technical solution adopted by the present invention is: [0004] Follow the steps below to control and adjust the transpo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/015H04N5/04
Inventor 李桂苓张宝菊张焱吕达夫王金健张浩
Owner TIANJIN UNIV
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