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Video encoding and decoding method and video encoding device and decoding device thereof

A video codec and video coding technology, which is applied to digital video signal modification, television, electrical components, etc., can solve the problems of data packet loss, the receiving end cannot obtain encoded frames, and the quality of video images in video communication, etc., to achieve Improve video image quality and avoid decoding errors

Inactive Publication Date: 2011-05-04
NANNING FUGUI PRECISION IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the network is congested, the data packet will be lost, resulting in the receiving end being unable to obtain the encoded frames in the lost data packet, so that the B frame or P frame that needs to use these encoded frames as a reference frame will be decoded incorrectly, affecting the video Quality of video images in communication

Method used

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  • Video encoding and decoding method and video encoding device and decoding device thereof
  • Video encoding and decoding method and video encoding device and decoding device thereof
  • Video encoding and decoding method and video encoding device and decoding device thereof

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Embodiment Construction

[0012] figure 1 It is an application environment diagram of the video communication system 10 proposed by the present invention. Such as figure 1 As shown, the video communication system 10 includes a video capture device 110 , a video encoding device 120 , a sending device 130 , a receiving device 210 , a video decoding device 220 and a video processing device 230 . Wherein, the video capture device 110 is used to capture video images. The video encoding device 120 encodes the collected video images to generate an encoded information stream. The sending device 130 is configured to send the coded information stream to the receiving device 210 through the network in the form of data packets. The receiving device 210 receives the data packet sent by the sending device 130 and converts it into an encoded information stream, and outputs it to the video decoding device 220 . The video decoding device 220 receives the encoded video image stream for decoding, and outputs the deco...

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Abstract

The invention relates to a video encoding and decoding method which is used in a video communication system, wherein the predictive encoding type and reference frame type of a video encoding device are controlled according to the network state and a notice message of a video decoding device. When a network is congested, the video encoding device utilizes a reference frame as a long-term reference frame to perform interframe prediction encoding and judges whether the video decoding device receives the corresponding reference frame according to the notice message of the video decoding device, thus the video encoding device and the video decoding device can utilize the same reference frame. The invention also provides the video encoding device and video decoding device which are used in the method in the invention. The video encoding and decoding method, video encoding device and video decoding device provided by the invention are used to encode and decode a video image by determining the long-term reference frame, thus the video encoding device and the video decoding device can utilize the same reference frame, the decoding error phenomenon caused by packet loss can be avoided and the quality of the video image in video communication can be increased.

Description

technical field [0001] The present invention relates to video encoding and decoding technology, in particular to a video encoding and decoding method used in a video communication system and a video encoding and decoding device using the same. Background technique [0002] In video communication technologies (such as video conferencing, video surveillance, video chat, etc.), the H.264 standard is usually adopted, and video images are encoded and decoded using two modes of intra-frame and inter-frame (intra / inter) prediction. Video images can be divided into three types according to the encoding mode: I frame, P frame and B frame. Wherein, the I frame is an image that uses intra-frame predictive coding and uses only the data in this frame for coding. The P frame or B frame is an image that adopts inter-frame predictive coding and uses the coded frame as a reference frame for predictive coding. Therefore, the coded frame must be used as the reference frame when coding the B ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32
CPCH04N19/105H04N19/176H04N19/61H04N19/166H04N19/89H04N19/573H04N19/58
Inventor 廖家伟杨雅婷童怡新
Owner NANNING FUGUI PRECISION IND CO LTD
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