Device and method for image encoding/decoding using prediction direction conversion and selective encoding

摘要

The present disclosure relates to an apparatus and method for encoding/decoding videos using prediction direction change and selective encoding. The present disclosure provides a video encoding apparatus that encodes the current block of a video, comprising a rectangle encoder for dividing and then successively encoding the current block at input into rectangular block units to output a rectangularly encoded bitstream; a square encoder for encoding the current block at input in square block units to output a squarely encoded bitstream; and an encoding selector for calculating the encoding costs of the rectangularly encoded bitstream and the squarely encoded bitstream so as to output the bitstream with a minimum encoding cost. According to the present disclosure, the prediction accuracy may be increased when encoding or decoding videos so that video encoding efficiency can be improved.

主权项

1. An apparatus for encoding a current block using an intra prediction, the apparatus comprising:
a rectangle encoder, upon receiving the current block, configured to sequentially encode the current block by dividing the current block into rectangular block units and produce a rectangularly encoded bitstream; a square encoder configured to encode the current block in one or more square block units and produce a squarely encoded bitstream; and an encoding selector configured to select one of the rectangle encoder and the square encoder, wherein the rectangle encoder comprises: a block divider configured to divide the current block into the rectangular block units and produce a plurality of rectangular subblocks; a rectangular prediction unit configured to predict the plurality of rectangular subblocks sequentially and output a plurality of rectangularly predicted subblocks; a rectangular subtraction unit configured to subtract the plurality of rectangularly predicted subblocks from the plurality of rectangular subblocks and generate a plurality of rectangular residual subblocks; a rectangular transform unit configured to transform the plurality of rectangular residual subblocks into a frequency domain; a rectangular quantization unit configured to quantize the plurality of transformed rectangular residual subblocks; a scan unit configured to scan quantized frequency coefficients of the plurality of quantized rectangular residual subblocks; and an encoder configured to encode the scanned quantized frequency coefficients and generate the rectangularly encoded bitstream.