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Image quality monitoring method of digital television playing terminal

A technology for image quality and playback terminals, applied in television, image communication, electrical components, etc., can solve problems such as mosaic phenomenon and image stagnation, and achieve the effect of improving work efficiency

Inactive Publication Date: 2014-06-18
JIANGSU UNIV
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Problems solved by technology

[0004] In the laboratory environment, when the frame rate Frv value is 40fps and the baud rate Brv value is 1000kbps, when the packet loss rate reaches 6%, there will be image stagnation, mosaic phenomenon, etc., which is not recommended by ITU-T. Less than 10% big difference

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  • Image quality monitoring method of digital television playing terminal
  • Image quality monitoring method of digital television playing terminal
  • Image quality monitoring method of digital television playing terminal

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Embodiment 1）

[0027] The method for monitoring the image quality of a digital TV broadcast terminal of this embodiment includes the following steps:

[0028] ①The monitoring system passes the formula: V q =I coding ×exp(-Pplv / Dpplv)×100-5, calculate the image quality V of the playback terminal q .

[0029] Pplv is the RTP packet loss rate. This data is obtained by monitoring RTP packets and comparing their sequence numbers.

[0030] Dpplv is the relationship between the stability of image quality and packet loss (Degree of video quality robustness against packet loss).

[0031] I coding It is an objective measurement of basic video quality accounting for coding Distortion that affects the image quality of codec distortion. I coding By formula: I coding =I ofr ×exp(-(ln(F rv )-ln(O fr )) 2 / (2×D Frv 2 )) calculated.

[0032] I ofr It is an objective measurement of maximum video quality at each bit rate (Objective measurement of maximum video quality at each bit rate). I ofr The calculation f...

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Abstract

The invention provides an image quality monitoring method of a digital television playing terminal. The method includes the following steps: 1. a monitoring system calculates image quality Vq of the playing terminal through a formula Vq=Icoding*exp(-Pplv / Dpplv)*100-5; and 2. a threshold value of the image quality Vq is set, and when a value of the image quality Vq is lower than the threshold value, the monitoring system sends out an alarm to a customer service center of an operator. The image quality monitoring method of the digital television playing terminal in the invention provides a brand new calculation formula of the image quality Vq, so that when the operator performs business deployment, the quality of the playing terminal can be quantified visually through the Vq value, thereby preventing defects in design; and in business operation, if the Vq value of some playing terminal is lower than the set threshold value, an alarm is automatically sent to the customer service center of the operator, and maintenance personnel can take corresponding measures in advance, thereby greatly improving work efficiency.

Description

Technical field [0001] The invention relates to a method for monitoring the image quality of a digital television broadcasting terminal. Background technique [0002] Video quality index V of the existing G.1070 q The calculation formula is: [0003] Vq=1+Icoding×exp(-Pplv / Dpplv). [0004] In a laboratory environment, when the frame rate Frv value is 40fps and the baud rate Briv value is 1000kbps, when the packet loss rate reaches 6%, image stagnation, mosaic phenomena, etc. will occur, which is incompatible with the ITU-T recommendation. Less than 10% makes a big difference. by figure 1 It can be seen that as the packet loss rate increases, V q The value is gradually decreasing. The G.1070 recommended by the ITU-T is a common algorithm, and corresponding improvements must be made to the actual application environment. Summary of the invention [0005] The purpose of the present invention is to provide a method for monitoring the image quality of a digital television broadcasting t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
Inventor 齐叶庭
Owner JIANGSU UNIV