Sk Telecom Company, Ltd.

Ryeonghee Kwon

Byeungwoo Jeon

Joohee Moon

Haekwang Kim

Yunglyul Lee

Jeongyeon Lim

Jongki Han

Joong Gunn Park

A video decoding apparatus using an intra-prediction, performs a method including: reconstructing information on an intra-prediction mode of a current block to be decoded from a bitstream, wherein the current block is a square block; reconstructing transform block information from the bitstream and reconstructing transform coefficients corresponding to each of one or more transform blocks divided in a quad tree structure from the current block; and reconstructing the current block based on the information on the intra-prediction mode and the reconstructed transform coefficients of the transform blocks.

Method and apparatus for decoding a video using an intra prediction

An apparatus for encoding images includes: a predictor to determine a prediction unit (PU) mode among a plurality of PU modes indicating types of partition of a current coding unit (CU) into one or more prediction units (PUs), and generate a predicted block of the current CU by performing an intra prediction or an inter prediction for each PU of the determined PU mode, wherein a size of the current CU is 2N&#xd7;N, and the plurality of PU modes includes 2N&#xd7;hN or hN&#xd7;N PU mode in which the current CU is partitioned into PUs respectively having a size of 2N&#xd7;hN or hN&#xd7;N, h being a fractional number smaller than 1; a subtractor to subtract the predicted block from the current CU to generate a residual block; a transformer to transform the residual block into a frequency domain to generate a frequency one or more transform blocks.

Method and apparatus for effective encoding/decoding using detailed predictive unit

An apparatus for encoding images includes: a predictor to determine a prediction unit (PU) mode among a plurality of PU modes indicating types of partition of a current coding unit (CU) into one or more prediction units (PUs), and generate a predicted block of the current CU by performing an intra prediction or an inter prediction for each PU of the determined PU mode, wherein a size of the current CU is 2N&#xd7;2N, and the plurality of PU modes includes 2N&#xd7;hN or hN&#xd7;2N PU mode in which the current CU is partitioned into PUs respectively having a size of 2N&#xd7;hN or hN&#xd7;2N, h being a fractional number smaller than 1; a subtractor to subtract the predicted block from the current CU to generate a residual block; a transformer to transform the residual block into a frequency domain to generate a frequency one or more transform blocks.

A video decoding apparatus using an intra-prediction, includes: a decoder configured to reconstruct information on an intra-prediction mode of a current block to be decoded from a bitstream, and reconstruct transform block information from the bitstream and reconstruct transform coefficients corresponding to each of one or more transform blocks divided in a tree structure from the current block; an inverse transformer configured to reconstruct residual signals by inversely transforming the transform coefficients corresponding to each of the transform blocks; a predictor configured to generate predicted pixels based on the information on the intra-prediction mode; and an adder configured to add the residual signals to the predicted pixels.

An apparatus for encoding a video includes: a predictor to predict a current block by using a plurality of prediction unit types and generate one or more predicted blocks; a subtracting unit to generate a residual block by the subtracting the predicted blocks from the current block; a transformer to generate a frequency transform block by transforming the residual block; a quantizer to generate a quantized frequency transform block by quantizing the frequency transform block; and an encoder to encode the quantized frequency transform block into a bitstream. When the quantized frequency transform block for one of the prediction unit types has all zero coefficients, the predictor terminates predicting the current block by using the remainder of the prediction unit types and determines the prediction unit type with said all zero coefficients as the prediction unit type for the current block.

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Seoul, South Korea

Ryeonghee Kwon