Sk Telecom Company, Ltd.

Sungjei Kim

Yoonsik Choe

Yonggoo Kim

Yungho Choi

Hayoon Kim

Jeongyeon Lim

Jinhan Song

Jinwoo Jung

Yung Ho Choi

An intra prediction encoding apparatus includes: an optimal filter selecting unit for providing a plurality of extrapolation prediction filter candidates for filtering pixels adjacent to a current block to be encoded, with respect to each intra prediction direction or prediction mode of the current block, and selecting a filter having lowest encoding cost among the plurality of extrapolation prediction filter candidates; a residual signal generating unit for generating an extrapolation prediction value of the current block through the filter selected by the optimal filter selecting unit, and generating a residual signal by calculating a difference between a generated extrapolation prediction value of the current block and a pixel value of the current block; a transform and quantization unit for performing transform and quantization on the residual signal generated by the residual signal generating unit; and an entropy encoding unit for performing entropy encoding on a transformed and quantized residual signal.

Device and method for competition-based intra prediction encoding/decoding using multiple prediction filters

The present disclosure relates to an apparatus and method for determining an adaptive filter tap to encode a wavelet transform coefficient, a wavelet transform apparatus and a method using the same, and a recording medium for the same, wherein the filter tap is determined rendering the high-band energy to be minimized, based not only on whether an edge is present but also on the edge location so as to adaptively determine the filter tap for an efficient coding of the wavelet transform coefficient. Therefore, the disclosure is able to prevent ringing artifacts and increase coding efficiency while maintaining clear definition on the edges.

Apparatus and method for determining adaptive filter tap to encode wavelet transform coefficient, wavelet transform apparatus and method using the same, and recording medium for the same

An encoding method and encoding apparatus for B-transform, and encoded data for same are provided. The apparatus is for encoding input data and includes: a B-transform unit for performing a B-transform on the input data to generate a binary expression; and an encoder for removing one or more binary symbols from the binary expression and scanning the binary expression with the one or more binary symbols removed to generate a bitstream. According to the method and apparatus, it is possible to encode uniform distribution data efficiently, and using the B-transform by its characteristics for reducing the bit number in the generation of the binary expressions from the B-transform operation on the uniform distribution data enhances the data compression performance.

Encoding method and encoding apparatus for B-transform, and encoded data for same

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Seoul, South Korea

Sungjei Kim