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Method and device of inserting video key frame

A video key frame and key frame technology, which is applied in the direction of digital video signal modification, TV, and pulse modulated TV signal transmission, can solve the problem of inability to take into account the video transmission efficiency and video fluency, and achieve the effect of reducing additional coding overhead.

Inactive Publication Date: 2008-05-21
TENCENT TECH (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a method and device for inserting video key frames to solve the problem that the prior art cannot take into account both video transmission efficiency and video fluency

Method used

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  • Method and device of inserting video key frame
  • Method and device of inserting video key frame
  • Method and device of inserting video key frame

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Embodiment Construction

[0026] In order to take into account both video transmission efficiency and video fluency, the present invention considers that in the encoding technology, the encoding of the key frame (I frame) only utilizes the correlation within the frame, while the encoding of the P frame will utilize the correlation between the frame and the frame. Therefore, for video frames with continuous content, the compression efficiency of P frames will be much higher than that of I frames, so there are too many I frames in the video stream, and the network traffic will be greatly increased. However, for two adjacent video frames whose content changes drastically, the compression ratios of the I frame and the P frame will be almost the same due to their small inter-frame correlation. Therefore, when inserting key frames, if the changes in the content of the video stream are considered, and the video frames whose video content undergoes drastic changes (such as large motions and scene changes) are e...

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Abstract

The invention discloses a method for inserting a key frame of video and the device; the invention is used for solving the problem of the prior art that the video transmission efficiency and video fluency can not be balanced. The method of the invention comprises the following steps: a sending terminal detects the change of the video images of two adjacent frames real time; when the change degree is greater than a preset threshold value, the current frame is coded as a key frame and is inserted into the video stream. The sending terminal of the invention comprises a video input module for obtaining the video frame image; a video coding module for coding the video frame image obtained by the video input module; a video transmitter module for transmitting the coded video stream output by the video coding module; the sending terminal also comprises a key frame inserting module for real time detecting the change degree between the two adjacent frame video images in the video input module; when the change degree is greater than the preset threshold value, the key frame inserting module instructs the video coding module to take the current frame coding as the key frame. The invention can balance the video transmission efficiency and video fluency simultaneously.

Description

technical field [0001] The invention relates to the field of Internet and communication, in particular to a method and device for inserting video key frames. Background technique [0002] With the rapid development of the Internet and the maturity of multimedia technology, the market application of video communication has become more and more extensive, and the ways of realizing video communication have also become various, such as videophone, instant messaging, video chat, Internet TV, IPTV And remote monitoring, telemedicine, etc. The broad prospects for the development of video communication make it another important form of communication after voice communication. [0003] The basis for realizing video communication is an efficient video compression algorithm. Currently mainstream video compression standards include MPEG4, H264, etc. In these compression techniques, coded images are generally classified into three types: intraframe (I), interframe (P) and bidirectiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/24H04N19/102
Inventor 刘俊
Owner TENCENT TECH (SHENZHEN) CO LTD
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