Method and system for optimizing image quality during video call

A video image and video call technology, applied in image communication, two-way working system, TV, etc., can solve problems such as unclear video, unclear image, delay, etc., to improve quality, ensure clarity, and have a good chat experience Effect

Active Publication Date: 2016-07-27
DONGGUAN ELF EDUCATIONAL SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is still a large difference in the current network speed, some places have no problem with video calls, and some places have difficulty meeting the needs of high-definition video calls
[0003] Video chatting in the case of poor network speed often sacrifices picture quality to ensure real-time

Method used

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  • Method and system for optimizing image quality during video call
  • Method and system for optimizing image quality during video call
  • Method and system for optimizing image quality during video call

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0063] Embodiment 1: The server reduces the frame rate of the video image according to the difference between the network transmission speed and the preset network speed threshold; the larger the difference, the slower the network transmission speed, and the number of pictures that can be transmitted normally per second The smaller the number, the lower the frame rate; the smaller the difference, the faster the network transmission speed, the more pictures that can be transmitted normally per second, and the higher the frame rate.

Embodiment approach 2

[0064] Embodiment 2: The server reduces the frame rate of the video image according to the ratio of the network transmission speed to the preset network speed threshold. The larger the ratio, the faster the network transmission speed, the more pictures that can be transmitted normally per second, and the larger the frame rate; the smaller the ratio, the slower the network transmission speed, and the number of pictures that can be transmitted normally per second The less, the lower the frame rate.

[0065] The clarity of pictures in a video image mainly includes the clarity of facial expressions, the clarity of human actions, and the clarity of the background. When the camera is facing the scenery, the clarity of pictures in the video image also includes the clarity of the scenery.

[0066] Step S204: Adjust the difference threshold according to the relationship between the network transmission speed and the preset network speed threshold.

[0067] The difference degree thresh...

Embodiment approach 3

[0079] Embodiment 3: the difference degree is the background difference degree, and the difference degree threshold is the background difference degree threshold; the definition is selected from the video image according to the reduced frame rate to be greater than or equal to the definition threshold and the difference A picture with a degree greater than or equal to the difference degree threshold constitutes a key video, specifically: select a picture whose resolution is greater than or equal to the sharpness threshold and the background difference degree is greater than or equal to the background difference degree threshold from the video image according to the reduced frame rate The picture constitutes the key video.

[0080] Further, it is also possible to arbitrarily select two or more difference degrees from expression difference degree, action difference degree, background difference degree and scenery difference degree for comprehensive comparison. The threshold is a...

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Abstract

The invention discloses a method and system for optimizing image quality during a video call. The method comprises the following steps: detecting the network transmission speed between a sending end and a receiving end by receiving a video image uploaded by the sending end; if the network transmission speed is lower than or equal to a preset network speed threshold, reducing the frame rate of the video image according to the network transmission speed, and detecting the definitions of pictures in the video image; and selecting the pictures, of which the definitions are higher than or equal to a definition threshold, from the video image according to the reduced frame rate to form a key video, and sending the key video to the receiving end. The method and the system provided by the invention have the advantages that a server carries out screening of the video image to be transmitted to the receiving end when detecting poor network conditions of the sending end and the receiving end, the high-definition pictures are screened to form the key video, and the key video is transmitted to the receiving end; therefore, the download pressure of the receiving end is alleviated, the definition of the video call is ensured, the quality of the video call is improved, and a user can achieve better conversation experience even if network signals are weak.

Description

technical field [0001] The invention relates to the technical field of video calls, in particular to a method and system for optimizing image quality during video calls. Background technique [0002] At present, with the improvement of wireless network speed, many portable devices are equipped with cameras and can make video calls. Because there is still a big difference in the current network speed, video calls are no problem in some places, and in some places the network speed is difficult to meet the needs of high-definition video calls. [0003] Video chatting in the case of poor network speed often sacrifices picture quality to ensure real-time performance, or improves picture quality but delays. There are two adaptive modes, but none of them meet user needs. When the network is poor, the picture will not Clarity and delay are not the best choices, especially when the image in the video changes rapidly, it is basically impossible to see the video clearly. Contents of...

Claims

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Application Information

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IPC IPC(8): H04N7/14G06K9/00
CPCH04N7/147G06V40/174
Inventor 郑战海
Owner DONGGUAN ELF EDUCATIONAL SOFTWARE CO LTD
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