Video coding and compressing method

A compression method and video coding technology, applied in the field of video coding, can solve the problems of high bit rate, poor picture quality, unable to reach 480P standard definition standard, etc., and achieve the effect of improving the compression rate, improving the use efficiency, and improving the video compression rate.

Active Publication Date: 2012-04-25
BEIJING BAOFENG TECH
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Problems solved by technology

As a result, many users with low network access speeds, such as 1Mbps ADSL users, cannot watch high-quality 480P and 720P videos at all, especially 720P videos, which can hardly be played smoothly while downloading
[0004] As a result, the picture quality of most of the current on

Method used

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  • Video coding and compressing method

Examples

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[0027] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0028] The idea of ​​improving the compression rate of video coding in the present invention is to improve the use efficiency of I frames while compressing the motion compensation data that has a low impact on the image quality. The compression rate is improved in both the material and motion compensation aspects. The specific process is as follows: figure 1 Shown, including:

[0029] In step S101, the source video stream is pre-encoded, and all groups of pictures (GOP) are reconstructed to obtain X GOPs and X I-frames. After pre-encoding, the macroblock coincidence degree of the frames can be obtained. The judging method for inserting the I frame in the GOP reconstruction process is: when the RGB difference betwe...

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Abstract

The invention discloses a video coding and compressing method, relating to the technical field of video coding. The video coding and compressing method comprises the following steps of: S1. pre-coding source video streaming, reestablishing all groups of pictures (GOP), and obtaining X GOPs and X I frames; S2. calculating the macro-block coincidence degrees of all the I frames, merging the I-frames with the macro-block coincidence degrees reaching a threshold value into a group, and obtaining N groups of I frames, wherein N is less than or equal to X; S3. calculating an optimizing and coding factor K of the source video streaming subjected to the S2, calculating a coding rate Z for coding the source video streaming according to the K; S4. coding the source video streaming according to the coding rate Z, taking sample frames in the predetermined N groups of I-frames as the I frames during coding, and taking the I frames serving as non-sample frames as P frames taking the sample frames in the same group as reference frames. According to the video coding and compressing method, the compression ratio of videos is increased.

Description

technical field [0001] The invention relates to the technical field of video coding, in particular to a video coding compression method. Background technique [0002] With the gradual improvement of the IP network infrastructure, more and more people start to watch video content through the IP network, including watching on a computer monitor connected to the wired Internet through a PC, or connected to a 3G wireless network through a mobile phone. At present, video data traffic has accounted for 70% of the entire Internet traffic, consuming a large amount of bandwidth resources and storage resources. [0003] At present, network video files basically use H.264 for video encoding, and then encapsulate the video stream and audio stream into container formats such as MP4, FLV, F4V or MKV. The standard H.264 encoder can compress 480P resolution video To 800 ~ 1000Kbps, compress 720P resolution video to 2Mbps. As a result, many users with low network access speeds, such as 1Mb...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N19/142H04N19/146H04N19/174H04N19/60
Inventor 崔天龙
Owner BEIJING BAOFENG TECH
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