Method and device for detecting video delay

A detection method and time delay technology, which are applied in video conference systems, two-way work systems, selective content distribution, etc., can solve the problems of lack of time delay test between acquisition and display modules, inapplicability, etc.

Active Publication Date: 2019-06-25
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high requirements for the system under test, and requires the time system of each module to be absolutely synchronized to ensure that the time difference between the calculation modules is accurate and objective; but it is not suitable for systems where the acquisition module, codec, and display modules are relatively independent
[0004] At present, there is no solution to collect the delay test between display modules at the local end

Method used

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  • Method and device for detecting video delay
  • Method and device for detecting video delay
  • Method and device for detecting video delay

Examples

Experimental program
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Effect test

Embodiment 1

[0086] The video delay detection method in this embodiment can be applied to a video conference or video call system, such as figure 1 shown, including the following steps:

[0087] Step 101: Simultaneously acquire the current first real-time time information of the local image acquisition device and the first image displayed by the local video display device; the first image includes the data obtained by the local image acquisition device to acquire the first image. an image corresponding to the second real-time time information; the first image is an image displayed on the local video display device after the local screen projection application;

[0088] Here, in practical application, the local image acquisition device may be a terminal with a camera function, such as a mobile phone or a camera, etc.; the local screen projection application may be a terminal with a video encoding and decoding function, such as a set-top box. The local image acquisition device is used for a...

Embodiment 2

[0134] In order to implement the method of Embodiment 1, this embodiment provides a video delay detection device, which can be applied to a video conference or a video call system, such as Figure 4 As shown, the device includes: an acquisition unit 41 and a first determination unit 42; wherein,

[0135] The acquisition unit 41 is configured to simultaneously acquire the current first real-time time information of the local image acquisition device and the first image displayed by the local video display device; the first image includes the data acquired by the local image acquisition device. an image of the second real-time time information corresponding to the first image; the first image is an image displayed on the local video display device after a local screen projection application;

[0136] The first determining unit 42 is configured to determine delay information according to the first real-time time information and the second real-time time information.

[0137] Whe...

Embodiment 3

[0181] Based on the first embodiment, this embodiment describes in detail the one-way delay between the local video acquisition module (local image acquisition device) and the local video display module (local video display device) in the video call system detection process.

[0182] In this embodiment, the local image acquisition device may be a mobile phone with a camera function or a common camera; the objects collected by the local image acquisition device include a mobile phone or a stopwatch with a timing function, and the timing accuracy is above the millisecond level; Screencasting applications can be applications on mobile phones and set-top boxes.

[0183] Figure 7 This embodiment is a schematic structural diagram of a remote camera system in which a mobile phone is used as a local image acquisition device, that is, a mobile phone A is used as a set-top box. Figure 8 It is a schematic diagram of the test system of this embodiment.

[0184] combine Figure 7 and...

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Abstract

The invention discloses a video time delay detection method. The method comprises following steps of obtaining current first real time information of a local end image collection device and a first image displayed by a local end video display device at the same time, wherein the first image is the image containing the second real time information corresponding to the first image collected by the local end image collection device; and determining time delay information according to the first real time information and second real time information. The invention also discloses a video time delay detection device.

Description

technical field [0001] The present invention relates to the field of data services, in particular to a method and device for detecting video delay. Background technique [0002] There is a clear demand for video calls based on the set-top box, but there are still many technical problems that have not been solved, including the need for the set-top box to use an external camera to achieve local video capture, but the cost of an external dedicated camera is relatively high. The remote camera of the set-top box solves this problem to a certain extent, but it also introduces a certain delay. [0003] Video delay is an important evaluation index of video conference or video call system. The test of video delay includes intrusive and non-intrusive. Among them, the non-intrusive test method mainly records the absolute value of the time when the video reaches the two modules by manually using a stopwatch, and then subtracts the time difference to obtain the time delay. This test me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/442H04N21/4788H04N7/14H04N7/15
Inventor 黄薇
Owner CHINA MOBILE COMM GRP CO LTD
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