Screen content coding predicting mode quick selection method based on edge point density

A technology of screen content coding and prediction mode, which is applied in the field of video processing, can solve problems such as limited time complexity, and achieve the effects of reducing coding time, speeding up coding, and good compatibility

Active Publication Date: 2016-07-20
XIDIAN UNIV
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Problems solved by technology

However, the time complexity reduction of this method is limited, so there is a need to propose faster prediction methods for screen content encoding

Method used

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  • Screen content coding predicting mode quick selection method based on edge point density
  • Screen content coding predicting mode quick selection method based on edge point density
  • Screen content coding predicting mode quick selection method based on edge point density

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Embodiment Construction

[0022] The implementation process of the present invention will be described in detail below with reference to the accompanying drawings. The implementation process is implemented with the two basic ideas of the present invention as the core. The detailed implementation mode and specific operation process are as follows.

[0023] Step 1: Input the video image and set the flag bit to 0.

[0024] The input video image is the screen content encoding SCC standard video image, which is divided into moving text image TGM type, animation A type, and mixed M type, including 10 test video images, namely FlyingGraphics, Desktop, Console, MissionControlClip3, Web_Browsing, Map, Programming, SlideShow, Robot, wordEditing.

[0025] Step 2: Determine whether the frame number of the video image where the current coding unit is located belongs to the interval [0,9], if yes, perform step three, otherwise, perform step eight.

[0026] Step 3: Distinguish the coding unit CU of 8×8 size and other sizes,...

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Abstract

The invention discloses a screen content coding predicting mode quick selection method based on edge point density, wherein the screen content coding predicting mode quick selection method mainly settles a problem of high computing complexity in prior art. The technical solution of the screen content coding predicting mode quick selection method is characterized in that the code sequence of a screen content coding (SCC) predicting mode is adjusted to IBC-2N-2N predicting mode, IBC-2N*N predicting mode, IBC-N*2N predicting mode, IBC-N*N predicting mode, in-frame Intra predicting mode and PLT predicting mode. Every time coding of one predicting mode is finished, a coding block flag (CBF) and a block vector difference (BVD) are detected for determining whether the coding block flag and the block vector difference are 0 and (0,0) respectively, and if yes, coding of subsequent predicting modes is skipped, and otherwise, coding of the subsequent predicting modes is successively performed until an optimal predicting mode is selected. The screen content coding predicting mode quick selection method can quickly differentiate cartoon-type video sequence and furthermore reduces coding time for cartoon-type and non-cartoon type video sequences. The screen content coding predicting mode quick selection method can be used for video processing.

Description

Technical field [0001] The invention belongs to the technical field of video processing, and in particular relates to a method for quickly selecting a prediction mode for video coding of screen content, which can be used in applications such as distance education, screen sharing, and wireless local area network. Background technique [0002] The content in applications such as distance education can be divided into two categories: screen content images and natural images. The screen content images are synthesized by a computer, and the natural images are produced by a camera. The difference between the screen content image and the natural image is that the screen content image contains high-contrast text and repeated prediction modes. The difference in physical characteristics also makes the encoding methods of the two different. If the high-efficiency video encoding HEVC is still used to encode the screen content image, serious image distortion will inevitably occur. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/107H04N19/122H04N19/176
CPCH04N19/107H04N19/122H04N19/176
Inventor 吴炜吴倩刘炯冯磊
Owner XIDIAN UNIV
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