CN210518643U

CN210518643U - System for accurately testing video monitoring time delay

Info

Publication number: CN210518643U
Application number: CN201921360328.9U
Authority: CN
Inventors: 朱章; 曹莹; 罗旋; 张瑞应
Original assignee: Guangzhou Haige Communication Group Inc Co
Current assignee: Guangzhou Haige Communication Group Inc Co
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-05-12
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a system for accurate test video monitoring time delay, include: the system comprises a camera, a switch, a decoder, a display terminal, an imaging terminal and a timer; the minimum unit of the timer is 1 millisecond; the camera, the switch, the decoder and the display terminal are sequentially connected, the camera is aligned with the timer, and the shutter exposure time of the imaging terminal is less than or equal to 1/1000 seconds; the timer and the display terminal are both in an imaging area of the imaging terminal; the display terminal is used for delaying when monitoring the test video, displaying the video shot by the camera, and displaying the time of the timer on the video. The utility model discloses a before subtracting the time that imaging terminal shot imaging terminal shoots, the video time is shot to the camera, just can the accurate time delay size of calculating monitoring system.

Description

System for accurately testing video monitoring time delay

Technical Field

The utility model relates to a video monitoring technology field, concretely relates to system for accurate test video monitoring time delay.

Background

With the construction and application of security projects such as safe cities, skynet projects and the like in China, video monitoring systems have been deeply inserted into all corners of the cities, and special occasions such as expressways, prisons, gas stations and the like have high requirements on video monitoring time delay. In a video surveillance system, system latency is a very important technical index, which determines whether the surveillance system can accurately present a front-end surveillance picture to a user in real time. The existing time delay test method mainly depends on subjective judgment of people, and the method estimates time difference manually by observing an actual picture and a terminal display picture at the same time, has large time delay estimation error and does not accurately acquire a time delay data support test result.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of above prior art existence, provide a system of accurate test video monitoring time delay of accurate calculation monitoring system's time delay size.

The purpose of the utility model is realized through the following technical scheme:

a system for accurately testing video surveillance latency, comprising: the system comprises a camera, a switch, a decoder, a display terminal, an imaging terminal and a timer; the minimum unit of the timer is 1 millisecond; the camera, the switch, the decoder and the display terminal are sequentially connected, the camera is aligned with the timer, and the shutter exposure time of the imaging terminal is less than or equal to 1/1000 seconds; the timer and the display terminal are both in an imaging area of the imaging terminal; the display terminal is used for delaying when monitoring the test video, displaying the video shot by the camera, and displaying the time of the timer on the video.

Preferably, the timer is a stopwatch.

Preferably, the imaging terminal is any one of a camera, a mobile phone, a DV, and a video recorder.

Preferably, the display terminal is a display.

Preferably, the shutter exposure time of the imaging terminal is equal to 1/1000 seconds.

Compared with the prior art, the utility model have following advantage:

according to the scheme, the second table and the display terminal are shot through the imaging terminal, the time on the timer and the time displayed on the display terminal are identified, the time on the timer is the time shot by the imaging terminal, the time displayed on the display terminal is shot by the imaging terminal, the time of the video shot by the camera is subtracted from the time shot by the imaging terminal, the time of the video shot by the camera is accurately calculated, the time delay of the monitoring system can be accurately calculated, and the time delay test result of the monitoring system can be accurately measured to millisecond level.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a system for accurately testing video surveillance delay according to the present invention.

Fig. 2 shows an imaging picture of the camera of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example 1:

the system for accurately testing video surveillance latency as shown in fig. 1 comprises: the system comprises a camera, a switch, a decoder, a display terminal, an imaging terminal and a timer; the minimum unit of the timer is 1 millisecond; the camera, the switch, the decoder and the display terminal are sequentially connected, the camera is aligned with the timer, and the shutter exposure time of the imaging terminal is less than or equal to 1/1000 seconds; the timer and the display terminal are both in an imaging area of the imaging terminal; the display terminal is used for delaying when monitoring the test video, displaying the video shot by the camera, and displaying the time of the timer on the video.

In this embodiment, the timer is a stopwatch.

The imaging terminal is a camera. The display terminal is a display.

The principle of the embodiment for accurately testing the video monitoring time delay is as follows:

when a test is carried out, a stopwatch is started, a video camera is started to shoot, a display terminal displays a video shot by the video camera, the time of a timer is displayed on the video, the precision of the video time is millisecond, the shooting is carried out by pressing a shutter of the camera, and an imaging picture of the camera is shown in fig. 2.

The key points of the scheme are the selection of a test tool and the time setting of shooting the shutter.

Example 2:

the present example is the same as example 1 except for the following technical features: the imaging terminal is a video recorder.

When testing is carried out, a stopwatch is started, a camera is started to shoot, a display terminal displays a video shot by the camera, the time of the stopwatch is in the video, the precision of the video time is millisecond, a video recorder is started to record the stopwatch and the display terminal, screenshot is carried out after the video is recorded, and the time t1 on a timer and the time t2 displayed in the video on the display terminal are identified on the screenshot; the video displayed by the display terminal is the video which is obtained by the video shot by the camera and reaches the display terminal through picture imaging, network transmission and image decoding. The time t2 in the displayed video is the time when the video is captured by the camera before the imaging terminal captures the video. The time T2 displayed in the video on the display terminal is subtracted from the time T1 on the timer to obtain the time delay T of the video monitoring system.

Compared with the existing testing means, the scheme can accurately calculate the time delay of the monitoring system and can accurately test the time delay testing result of the system to millisecond level.

The above-mentioned specific implementation is the preferred embodiment of the present invention, can not be right the utility model discloses the limit, any other does not deviate from the technical scheme of the utility model and the change or other equivalent replacement modes of doing all contain within the scope of protection of the utility model.

Claims

1. A system for accurately testing video surveillance latency, comprising: the system comprises a camera, a switch, a decoder, a display terminal, an imaging terminal and a timer; the minimum unit of the timer is 1 millisecond;

the camera, the switch, the decoder and the display terminal are sequentially connected, the camera is aligned with the timer, and the shutter exposure time of the imaging terminal is less than or equal to 1/1000 seconds; the timer and the display terminal are both in an imaging area of the imaging terminal;

the display terminal is used for delaying when monitoring the test video, displaying the video shot by the camera, and displaying the time of the timer on the video.

2. The system for accurately testing video surveillance latency of claim 1, wherein: the timer is a stopwatch.

3. The system for accurately testing video surveillance latency of claim 1, wherein: the imaging terminal is any one of a camera, a mobile phone, a DV and a video recorder.

4. The system for accurately testing video surveillance latency of claim 1, wherein: the display terminal is a display.

5. The system for accurately testing video surveillance latency of claim 1, wherein: the shutter exposure time of the imaging terminal is equal to 1/1000 seconds.