CN1909678A - Delay testing method for IP video communication system - Google Patents
Delay testing method for IP video communication system Download PDFInfo
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- CN1909678A CN1909678A CN 200610019969 CN200610019969A CN1909678A CN 1909678 A CN1909678 A CN 1909678A CN 200610019969 CN200610019969 CN 200610019969 CN 200610019969 A CN200610019969 A CN 200610019969A CN 1909678 A CN1909678 A CN 1909678A
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Abstract
The invention relates to a delay testing method of IP video communication system, which uses one computer with detector to operate one clock picture, as testing reference; uses one camera with analogue output to shoot said clock picture; uses the output of camera as the input signal of tested system; the video receiver of tested system receives and decodes and plays the clock picture on one detector; uses one visible light camera to shoot the input and output pictures; therefore, based on the clock difference, the end-to-end delay of system can be obtained. The invention is simple, effective and accurate with low cost.
Description
Technical field
The present invention relates to the video communication technology field, specifically a kind of IP video communication system delay testing method.
Background technology
In the present IP video communication system development process,, need to use the delay of network test instrument test network, use the delay that comes test video collection, Code And Decode equipment based on the instrument of signal analysis again for the end-to-end delay of test macro.This device is accurately efficient, but invest huge, the equipment complexity, operation also needs the professional could use through special training.For application system development and integrated deployment department, can only estimate with sensation, or rely on the equipment supplier data are provided, lack a kind of simple, type selecting and system evaluation that economic, accurate testing apparatus is used for equipment.
Summary of the invention
The present invention seeks under the situation of not using network test instrument and signal analyzer, accurately to test the end-to-end delay of system under test (SUT), can assess simultaneously the efficient of IP video code and decode equipment, can test I P video communication system in the end-to-end delay of system a kind of novel, economic and practical, method of testing of being easy to make up is provided.
IP video communication system delay testing method of the present invention is achieved in that
One of the computer run of a band monitor of employing is accurate to the clock picture of Millisecond, is test benchmark with this picture; Use one to adopt the camera of simulation output to take the clock picture, with the input signal of camera output as system under test (SUT).Video receiver at system under test (SUT) receives, decodes at a monitor read clock picture.Use a visible light photography machine to take down the input and output picture simultaneously, can draw the end-to-end delay of system thus according to the difference of clock in the picture of film.
Listen the IP video communication system delayed test device of stating, the computer clock precision is in 1 millisecond, can be PC, work station or server.
Described IP video communication system delayed test device, clock software extract the computer system clock and are displayed in full screen with " dividing: second: millisecond " form.
Described IP video communication system delayed test device, monitor adopts the CRT monitor.
Described IP video communication system delayed test device, camera adopt analog signal output, signal are not carried out digitized processing.
Described IP video communication system delayed test device, video camera adopts analog camera, digital camera.
Described IP video communication system delayed test device requires described computer monitor and output monitor to place the same lens shooting requirement of satisfying video camera.
Its operation principle:
The simulation camera is taken the reference clock picture as input signal, the input system under test (SUT); When clock be T1 picture through the collection of system under test (SUT), coding, transmission, when decoding is played to output monitor reference clock should be T2=T1+ Δ T wherein Δ T be the delay of system under test (SUT); The visible light photography machine is simultaneously to exporting and import T1 and the T2 that two picture photographings can sample synchronization; Play the sampling video recording, use to suspend and on each picture of certain intervals, can read T1 and T2; The difference that deducts the T2 gained with T1 is the test result Δ T to system under test (SUT).
Description of drawings
Accompanying drawing is an IP video communication system delayed test system schematic.
Embodiment
With reference to the accompanying drawings, test benchmark clock picture adopts the clock software for display on the computer that operates in the band monitor to generate.The clock accuracy of this computer reaches millisecond, and the clock picture adopts " dividing: second: millisecond " form to show the clock that extracts from system in real time;
Test input signal is the output signal of camera, and this camera is taken the reference clock picture from the front;
The output monitor is placed on by the reference clock picture side by side;
Adjustment is taken the picture with reference clock and two monitors of output monitor simultaneously as the visible light photography machine of sample devices;
Play the sampling video recording, suspend, read two clock values in two same pictures at predetermined instant;
Two clock values reading are subtracted each other promptly get a test result;
Different constantly reading to the sampling video recording obtains this test result constantly.
Because the used computer of the present invention, monitor, camera, video camera is prior art equipment, be known known technology to those skilled in the art, so do not providing its realization description in detail.
Claims (5)
1, a kind of IP video communication system delay testing method is characterized in that: one of the computer run of a band monitor of employing is accurate to the clock picture of Millisecond, is test benchmark with this picture; Use one to adopt the camera of simulation output to take the clock picture, with the input signal of camera output as system under test (SUT), video receiver at system under test (SUT) receives, decodes at a monitor read clock picture, use a visible light photography machine to take down the input and output picture simultaneously, can draw the end-to-end delay of system thus according to the difference of clock in the picture of film.
2, IP video communication system delay testing method according to claim 1, it is characterized in that: the computer clock precision is in 1 millisecond, can be PC, work station or server.
3, IP video communication system delay testing method according to claim 1 is characterized in that: clock software extracts the computer system clock and is displayed in full screen with " dividing: second: millisecond " form.
4, IP video communication system delay testing method according to claim 1 is characterized in that: monitor adopts the CRT monitor, and camera adopts analog signal output, and video camera adopts analog camera, digital camera.
5, IP video communication system delay testing method according to claim 1 is characterized in that: computer monitor and output monitor are placed the same lens shooting requirement of satisfying video camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610019969 CN1909678A (en) | 2006-08-11 | 2006-08-11 | Delay testing method for IP video communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610019969 CN1909678A (en) | 2006-08-11 | 2006-08-11 | Delay testing method for IP video communication system |
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| CN1909678A true CN1909678A (en) | 2007-02-07 |
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| CN 200610019969 Pending CN1909678A (en) | 2006-08-11 | 2006-08-11 | Delay testing method for IP video communication system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012146035A1 (en) * | 2011-04-25 | 2012-11-01 | 中兴通讯股份有限公司 | Method for testing video delay in video conference and computer |
| CN103813161A (en) * | 2012-11-12 | 2014-05-21 | 腾讯科技（深圳）有限公司 | Delayed testing method and device |
| CN104023229A (en) * | 2014-06-23 | 2014-09-03 | 公安部第三研究所 | Detection method and system for performances of non-contact type image system |
| CN105791986A (en) * | 2014-12-23 | 2016-07-20 | ***通信集团公司 | Video time delay detection method and device |
| EP2908173A4 (en) * | 2012-10-12 | 2016-10-26 | Seiko Epson Corp | Method, display device, and device for measuring shutter time lag; method for manufacturing camera; method for measuring camera display delay; and device for measuring display delay |
| CN106454335A (en) * | 2016-11-20 | 2017-02-22 | 中国航空工业集团公司洛阳电光设备研究所 | Infrared imaging delay testing device for photoelectric product |
| CN106534843A (en) * | 2016-11-14 | 2017-03-22 | 北京凌宇智控科技有限公司 | Delay measurement method and device |
| CN106768856A (en) * | 2016-11-15 | 2017-05-31 | 北京小米移动软件有限公司 | The determination method and device that a kind of traveling time postpones |
| CN107801021A (en) * | 2017-10-27 | 2018-03-13 | 优酷网络技术（北京）有限公司 | Assess the methods, devices and systems of real-time video delay |
| CN110267031A (en) * | 2019-05-16 | 2019-09-20 | 中国科学院西安光学精密机械研究所 | A kind of camera output delay time test method and system |
| CN112540364A (en) * | 2019-09-05 | 2021-03-23 | 浙江舜宇智能光学技术有限公司 | Time delay measuring method, measuring device and measuring system of TOF depth camera |
| CN110798682B (en) * | 2019-11-28 | 2021-06-04 | 湖南金翎箭信息技术有限公司 | Time delay test system |
| CN114071120A (en) * | 2020-08-03 | 2022-02-18 | 炬才微电子（深圳）有限公司 | Camera testing system, method, storage medium and electronic equipment |
-
2006
- 2006-08-11 CN CN 200610019969 patent/CN1909678A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012146035A1 (en) * | 2011-04-25 | 2012-11-01 | 中兴通讯股份有限公司 | Method for testing video delay in video conference and computer |
| US9918078B2 (en) | 2012-10-12 | 2018-03-13 | Seiko Epson Corporation | Method of measuring display delay time, display device, and method of manufacturing display |
| EP2908173A4 (en) * | 2012-10-12 | 2016-10-26 | Seiko Epson Corp | Method, display device, and device for measuring shutter time lag; method for manufacturing camera; method for measuring camera display delay; and device for measuring display delay |
| US9565425B2 (en) | 2012-10-12 | 2017-02-07 | Seiko Epson Corporation | Method of measuring shutter time lag, display device for measuring shutter time lag, shutter time lag measurement apparatus, method of manufacturing camera, method of measuring display delay of camera, and display delay measurement apparatus |
| US9769470B2 (en) | 2012-10-12 | 2017-09-19 | Seiko Epson Corporation | Method of measuring display delay of camera and display delay measurement apparatus |
| CN103813161A (en) * | 2012-11-12 | 2014-05-21 | 腾讯科技（深圳）有限公司 | Delayed testing method and device |
| CN104023229A (en) * | 2014-06-23 | 2014-09-03 | 公安部第三研究所 | Detection method and system for performances of non-contact type image system |
| CN105791986A (en) * | 2014-12-23 | 2016-07-20 | ***通信集团公司 | Video time delay detection method and device |
| CN105791986B (en) * | 2014-12-23 | 2019-06-25 | ***通信集团公司 | The detection method and device of video time delay |
| CN106534843A (en) * | 2016-11-14 | 2017-03-22 | 北京凌宇智控科技有限公司 | Delay measurement method and device |
| CN106768856A (en) * | 2016-11-15 | 2017-05-31 | 北京小米移动软件有限公司 | The determination method and device that a kind of traveling time postpones |
| CN106768856B (en) * | 2016-11-15 | 2019-03-15 | 北京小米移动软件有限公司 | A kind of determination method and device of traveling time delay |
| CN106454335B (en) * | 2016-11-20 | 2018-05-15 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of photovoltaic infrared imaging delayed test device |
| CN106454335A (en) * | 2016-11-20 | 2017-02-22 | 中国航空工业集团公司洛阳电光设备研究所 | Infrared imaging delay testing device for photoelectric product |
| CN107801021A (en) * | 2017-10-27 | 2018-03-13 | 优酷网络技术（北京）有限公司 | Assess the methods, devices and systems of real-time video delay |
| CN110267031A (en) * | 2019-05-16 | 2019-09-20 | 中国科学院西安光学精密机械研究所 | A kind of camera output delay time test method and system |
| CN112540364A (en) * | 2019-09-05 | 2021-03-23 | 浙江舜宇智能光学技术有限公司 | Time delay measuring method, measuring device and measuring system of TOF depth camera |
| CN110798682B (en) * | 2019-11-28 | 2021-06-04 | 湖南金翎箭信息技术有限公司 | Time delay test system |
| CN114071120A (en) * | 2020-08-03 | 2022-02-18 | 炬才微电子（深圳）有限公司 | Camera testing system, method, storage medium and electronic equipment |
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Open date: 20070207 |