Video coder, method for internal prediction and video data compression

Abstract

The invention discloses a method for internal prediction. The method comprises following steps: firstly, determining a first internal prediction mode of a left region block, a second internal prediction mode of an upper region block and a third internal prediction mode of a current region block, wherein the left region block is located on the left of the current region block, and the upper regionblock is located over the current region block; and then, selecting a target pixel from a plurality of pixels of the current region block, calculating a first predicted value of the target pixel according to the first internal prediction mode, calculating a second predicted value of the target pixel according to the second internal prediction mode, and calculating a third predicted value of the target pixel according to the third internal prediction mode; finally, averaging the first predicted value, the second predicted value and the third predicted value to obtain a weighted average predicted value. With the internal prediction method of an embodiment of the invention, the internal prediction can be performed on the current region block according to the internal prediction modes of adjacent region blocks. The invention also discloses a video coder and a method for video data compression.

Description

technical field [0001] The invention relates to the field of video processing, in particular to video data coding. Background technique [0002] Video data includes a series of frames, and each frame is a picture and is divided into a plurality of blocks for respective encoding processing. A video block can be encoded by intra-mode or inter-mode. In intra prediction mode, pixels of a video block are compared with pixels of adjacent blocks to reduce the amount of data used for encoding. In the inter-prediction mode, the pixels of a video block of the current picture are compared with the pixels of the corresponding location block of a reference picture, so as to reduce the amount of data used for encoding. [0003] Figure 1A It is a block diagram of a video encoder (Video encoder) 100 that performs video encoding according to an intra prediction mode. Video encoder 100 includes an intra prediction module 102 , a subtraction module 104 , a transform module 106 , and a quan...

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Problems solved by technology

[0005] However, Figure 1A The Video Encoder 100 still has the disadvantage of

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