METHOD AND DEVICE FOR IMAGE ENCODING/DECODING USING ARBITRARY PIXELS IN A SUB-BLOCK

摘要

The present invention relates to a method and device for image encoding/decoding using arbitrary pixels in a sub-block. The present invention comprises an arbitrary pixel extraction part, a first prediction part, a first subtraction part, a first transformation part, a first quantization part, a first inverse quantization part, a first inverse transformation part, a first addition part, a second prediction part, a second subtraction part, an arbitrary residual pixel combination part, a second transformation part, a second quantization part, and an encoding part. After an arbitrary pixel has been extracted from each sub-block of a current block, encoded, decoded, and restored, the restored arbitrary pixel is used to predict and encode the remaining pixels of the respective sub-block. According to the present invention, encoding efficiencies can be enhanced in the encoding and decoding of images by improving the prediction accuracy when intra prediction is performed on the pixel of a block to be encoded or decoded.