Video coding and decoding methods and devices

A technology of video encoding and decoding, which is applied in the field of decoding methods, video encoding, video encoding, and decoding devices. It can solve the problems of not considering long-term scale correlation, etc., and achieve the effect of reducing network bandwidth requirements and improving compression ratio

Inactive Publication Date: 2010-06-09
NAT UNIV OF DEFENSE TECH
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  • Description
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Problems solved by technology

[0005] However, the existing stateful compression coding method only utilizes the correlation of video data on a short time scale, and does not consider the correlation on a long time scale, such as MPEG-2. Therefore, the stateful compression coding method needs to be improved , to further improve the compression ratio of video data, reduce the requirements of video data transmission on network bandwidth, and solve the problem of transmitting high-quality video data in bandwidth-limited wireless networks and the Internet

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  • Video coding and decoding methods and devices
  • Video coding and decoding methods and devices
  • Video coding and decoding methods and devices

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Embodiment Construction

[0032] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0033] figure 1 It is a flow chart of a video coding method provided by an embodiment of the present invention. The execution subject of this embodiment is a video coding device, more specifically, multiple code generation units in the video coding device, such as figure 1 As shown, the video encoding method provided in this embodiment includes:

[0034] Step 101, cache a plurality of first key frames, the plurality of first key frames respectively correspond to key frames of different time periods from the current frame, and each first key frame has a first index value;

[0035] Wherein, the first index value is used to identify different first key frames, and the effective first index value is an integer greater than or equal to 0. For example, the number of the coding generation unit may be used as the first index ...

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Abstract

The invention relates to video coding and decoding methods and devices, wherein the video coding method comprises the following steps of: caching a plurality of first keyframes, wherein the plurality of first keyframes respectively correspond to keyframes which are distant from different time slots of the current frame, and each first keyframe has a first index value; respectively taking each first keyframe as a reference frame, carrying out the coding on an original video and generating a plurality of first coding video frames; comparing the plurality of first coding video frames and acquiring an output video frame and an output index value; and outputting the output video frame and the output index value. The video coding and decoding methods and devices improve the compression ratio of video data under the condition of ensuring the image quality by fully utilizing the relativity on the long-time scale in a video scene by caching the plurality of first keyframes.

Description

technical field [0001] The invention relates to a video image compression encoding technology, in particular to a video encoding and decoding method and a video encoding and decoding device. Background technique [0002] The development of network technology and multimedia technology has prompted more and more streaming media applications to appear on the Internet. The proportion of streaming media data transmission in the Internet is increasing, which brings challenges to the transmission capacity of the Internet. At the same time, in the field of wireless communication, due to the low bandwidth of the wireless link, the bandwidth is shared by communication nodes within the communication coverage area, so it is difficult to meet the communication bandwidth requirements of streaming media. Generally, video streams with a certain image quality often have high requirements for transmission bandwidth, usually requiring a bandwidth of more than 64Kbps, which still exceeds the t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/172
Inventor 彭伟卢泽新张晓哲孙志刚吴纯青虞万荣莫敦运
Owner NAT UNIV OF DEFENSE TECH
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