Video transformation coding method based on spatial resolution transformation

Abstract

Present invention provides video converting encoding method base on spatial resolution conversion, belonging to data compression field, referring to video compression and transmitting field technology, capable of greatly reducing video converting encoding calculated amount to raise encoding speed, and effectively decreasing the influence of network bandwidth variation to reconstruction video image quality, at the same time to ensure video stream extensibility and interactivity providing admirable vision experience. Present invention adoptive technical proposal is reestimating video stream motion vector motion vector after transform coding by use of encoded video stream movement messages and DCT conversion obtained dc coefficient, vacancy domain lower sampling filter selecting taking four point pixel value average mode, selecting large DC coefficient as macroblock activity judgment sign, utilizing four macroblock and neighbor eight macroblock motion vector to calculate encoding video stream relevant macroblock motion vector. Present invention mainly is used in data compression and communication.

Description

Technical field [0001] The present invention belongs to the field of data compression and communication, relates to the technology of the field of video compression and transmission, and specifically relates to a video conversion coding method based on spatial resolution conversion. Background technique [0002] Video conversion coding can be understood as the conversion from one video compression format to another. The format mentioned here includes the syntax of the code stream and the relevant parameters in the code stream, such as the code rate and the spatial resolution of the video image. , Time resolution, adaptability to network bandwidth, etc., its essence is to adapt to different bandwidth conditions of the transmission network or according to the client’s decoding capabilities, convert a video stream in one compression format to the same or another compression format. Video streaming. [0003] Scalable video coding is another coding method that compresses video in a mu...

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Problems solved by technology

[0010] Literature [1]~[3] studied the reestimation method of the fast motion vector and the update criterion of the motion vector in the process of spatial video resolution conversion coding, but the quality of the reconstructed video image obtained by them is not satisfactory

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