Method and device for encoding and decoding by using parallel intra-rediction by a coding unit

Abstract

The embodiment of the present invention relates to a method and device for encoding and decoding by using a parallel intra-prediction by a coding unit. More particularly, an embodiment of the present invention relates to a device and method for encoding / decoding images, the method comprising the steps of: generating a left extrapolation pixel of the coding unit by using the leftmost original pixel value of the coding unit or a left top block pixel value of the coding unit according to the direction of an intra-prediction mode with respect to a coding unit; generating a prediction block by intra-predicting the coding unit using an adjacent pixel which includes the left extrapolation pixel; encoding the coding unit, and encoding prediction information which includes a prediction mode performing the intra-prediction; and decoding an encoded bitstream.

Description

technical field [0001] Embodiments of the present disclosure relate to a method and apparatus for encoding and decoding using parallel intra prediction at the CU level, and more particularly, relate to being able to simultaneously perform multiple A video encoding / decoding method and apparatus for intra-predictive encoding of a coding unit block, and enabling video data compression in parallel to obtain a high-speed encoder and a high-speed decoder. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] In a video data compression device, intra-coding is performed by processing an efficiently compressed residual signal (obtained by effectively removing spatial redundancy in a frame or block) through a transform technique, quantization, and entropy encoding. [0004] Common intra-coding methods include intra-coding techniques based on directional extrapola...

AI Technical Summary

Problems solved by technology

However, since parallelism has at most a subsidiary block shape within the framework of a macroblock, parallelism cannot be easily implemented under the current multi-partition structure

In addition, since pixel values ​​far from the current auxiliary block are used as extrapolated predictors, compression efficiency will be reduced

This poses a limiting factor for video encoding and decoding by prior art parallel processing systems of multi-core processors and graphics processing units (GPU: graphic processing unit)

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