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Video Delay Test Device in Surveillance System

A monitoring system and delay testing technology, which is applied in closed-circuit television systems, televisions, electrical components, etc., can solve the problems that the cameras cannot capture signals at both ends at the same time, and the video delay calculation cannot be applied, so as to achieve the effect of improving the technical level

Active Publication Date: 2021-03-12
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In engineering applications, video encoders and decoding display units are often placed on both sides of a long physical distance, and it is impossible to use cameras to capture signals at both ends at the same time, so this invention patent cannot be applied to video delay calculations in engineering

Method used

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  • Video Delay Test Device in Surveillance System
  • Video Delay Test Device in Surveillance System
  • Video Delay Test Device in Surveillance System

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Embodiment Construction

[0031] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] see Figure 1 ~ Figure 3 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, so that only the components related to the present invention are shown in the diagrams rather than the number, shape and Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the ...

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Abstract

The invention provides a video delay test device in a monitoring system, including: a video signal generator, used to generate a continuously changing time-varying video signal and a time stamp of each frame of image, and pack and transmit image mode information and time information To the delay analysis unit; the video delay analysis unit is used to identify the frame pattern of the decoded video, to determine the system time generated by the frame pattern, and subtract the system time displayed by the current decoding from the frame pattern occurrence time, To obtain the video transmission delay of the system; the synchronization link is used to realize the synchronization of the video signal generator and the video delay analysis unit. The invention solves the problem of video delay measurement in practical engineering applications, provides relevant professional institutions and construction units with a realizable video delay measurement device and method, fills the gap in the measurement field, and improves the security system of our country, especially the monitoring system. techinque level.

Description

technical field [0001] The present invention relates to a video delay measurement device, in particular to a video delay test device in a monitoring system, which can measure the video delay of a multimedia system with the camera part as image input, and the device can be used in a laboratory environment It realizes the measurement of the video delay performance of the multimedia system, and can also be used on the engineering site to realize the measurement of the video delay performance of the multimedia system under a large physical span. Background technique [0002] Video delay is an important technical indicator of multimedia system. In end-to-end applications, video delay includes three parts: encoding delay of video encoder, transmission delay and decoding display delay. For example, in video access control equipment, video delay will affect the user's subjective experience; in closed-loop In a video surveillance system, delay determines the timeliness of video info...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/00H04N7/18
CPCH04N7/18H04N17/00
Inventor 刘立庄赵丹张浩
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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