Sk Telecom Company, Ltd.

Sk Planet Co., Ltd.

Eleven Street Co., Ltd.

HaYoon Kim

Byeungwoo Jeon

Yunglyul Lee

Haekwang Kim

Joohee Moon

Kwanghyun Won

Jungyoup Yang

Mincheol Park

Dongwon Kim

Daeyeon Kim

Yoonsik Choe

Yonggoo Kim

Yungho Choi

Donghoon Han

Kioh Kim

Hyemin Jun

Byongho Kim

Junhyuk Ahn

Kihyun Kim

Jinwoo Jeong

A method and apparatus for editing an uploaded image are provided. A controller of the apparatus receives the uploaded image that contains an article area showing an image of a purchased article and a personal information area showing personal information. The controller identifies the article area and the personal information area in the received image, edits the received image to protect the personal information without damaging the article area, and posts the edited image to a webpage.

Method and apparatus for editing uploaded image

A video decoding method using an inter prediction, includes: reconstructing a first differential motion vector and a second differential motion vector of a current block by decoding encoded data; deriving a first predicted motion vector and a second predicted motion vector of the current block from one or more neighboring blocks of the current block; generating a first motion vector of the current block by adding the first candidate motion vector to the first differential motion vector, and a second motion vector of the current block by adding the second candidate motion vector to the second differential motion vector; generating a predicted block of the current block by using the first and second motion vectors; reconstructing a residual block by decoding residual signals included in the encoded data; and adding each pixel value of the predicted block to a corresponding pixel value of the residual block.

Method and apparatus for encoding/decoding the motion vectors of a plurality of reference pictures, and apparatus and method for image encoding/decoding using same

A video decoding apparatus for decoding a current block comprised of a plurality of subblocks by using an intra prediction, includes: a prediction mode extractor to extract information on an intra prediction mode of the current block; an inverse quantization unit to inversely quantize transformed and quantized residual subblocks corresponding to the subblocks of the current block to thereby generate transformed residual subblocks; an inverse transform unit to inversely transform the transformed residual subblocks to thereby reconstruct residual subblocks; a prediction unit to sequentially predict each of the subblocks from neighboring pixels selected based on the information on the intra prediction mode of the current block and thereby generate a plurality of predicted subblocks corresponding to the subblocks; and an adder to sequentially reconstruct the subblocks by adding each of the reconstructed residual subblocks to a predicted subblock corresponding thereto.

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

A method performed by a video encoding apparatus for encoding a current motion vector of a current block in a current picture, includes: encoding, into a bitstream, mode information for use in selecting a motion vector prediction mode among a plurality of motion vector prediction modes; and when the mode information indicating a first motion vector prediction mode among the plurality of motion vector prediction modes is encoded, deriving a set of candidate motion vectors from motion vectors of a plurality of neighboring blocks of the current block, and selecting a candidate motion vector from the set of the candidate motion vectors; setting the prediction motion vector of the current block into the selected candidate motion vector; and generating a differential motion vector of the current block by subtracting the prediction motion vector from the current motion vector, and encoding the differential motion vector into the bitstream.

Method for encoding/decoding motion vector and apparatus thereof

An apparatus for reconstructing a current motion vector of a current block in a current frame by determining a predicted motion vector of the current motion vector, includes: a decoder to reconstruct a differential motion vector and a prediction candidate identification flag by decoding a bitstream; and a motion vector reconstructor to derive one or more motion vector prediction candidates to predict the current motion vector, set the predicted motion vector to a motion vector prediction candidate identified by the prediction candidate identification flag among the one or more motion vector prediction candidates, and reconstruct the current motion vector of the current block by adding the predicted motion vector to the differential motion vector.

Method and apparatus for encoding a motion vector, and method and apparatus for encoding/decoding image using same

A method performed by an apparatus for intra-predicting a current block in the unit of subblocks, comprises: determining an intra prediction mode of the current block among a plurality of intra prediction modes; identifying the subblocks split from the current block; and sequentially reconstructing the identified subblocks using an intra prediction mode identical to the determined intra prediction mode of the current block, wherein a subblock to be reconstructed is predicted using at least one pre-reconstructed neighboring subblock in the current block.

Video encoding and decoding method using an intra prediction

An apparatus of predicting a current motion vector of a current block in a current frame for predictively decoding the current motion vector, the apparatus includes: a prediction candidate selector to select one or more motion vector prediction candidates from among blocks in the current frame and a block in a reference frame other than the current frame to determine a predicted motion vector corresponding to the current motion vector; and a predicted motion vector determiner to determine the predicted motion vector among the one or more motion vector prediction candidates, wherein the prediction candidate selector comprises: means for deriving one or more first motion vector prediction candidates from motion vectors of one or more blocks adjacent to the current block in the current frame, and means for deriving a second motion vector prediction candidate from a motion vector of the block located in the reference frame.

An apparatus for reconstructing a current motion vector of a current block in a current frame by determining a predicted motion vector of the current motion vector, includes: a differential motion vector decoder to reconstruct a differential motion vector by decoding an encoded differential motion vector included in a bitstream; and a motion vector reconstructor to derive one or more motion vector prediction candidates to predict the current motion vector, set the predicted motion vector to a motion vector prediction candidate determined among the one or more motion vector prediction candidates, and reconstruct the current motion vector of the current block by adding the predicted motion vector to the differential motion vector.

A method for encoding pixels in an image, includes: encoding an offset to be applied to a reference frame; generating predicted pixels of the pixels in the image, based on interpolating pixels in the reference frame and then adding the offset to the interpolated pixels; and encoding residual signals that are differences between the pixels in the image and the predicted pixels, wherein the encoding of the residual signals comprises: skipping both transform and quantization with respect to residual signals of which an encoding scheme corresponds to skipping of both transform and quantization, the encoding scheme related to transform and quantization, skipping transform and performing quantization with respect to residual signals of which the encoding scheme corresponds to skipping of transform, and performing transform and quantization with respect to residual signals of which the encoding scheme corresponds to skipping neither transform nor quantization.

Method and apparatus for generating a reference frame and method and apparatus for encoding/decoding image using the same

An apparatus for generating a reference frame is disclosed including: an interpolation unit for interpolating a reference frame per fractional pixel; a virtual encoder for determining a block mode of a current frame and a motion vector according to the block mode by using an interpolated reference frame; an offset calculator for calculating an offset for each pixel of the interpolated reference frame by using the block mode and the motion vector; and an offset adder for generating an offset interpolated reference frame by adding the offset for each pixel to each pixel of the interpolated reference frame. By adding the offset calculated according to the block mode to the reference frame for the inter prediction and making the reference frame to be used for the motion estimation and compensation similar to the current frame to be encoded, motion prediction is accurate and compression efficiency is improved.

A video decoding apparatus for decoding a current block comprised of a plurality of subblocks by using an intra prediction, includes: an inverse quantization unit to inversely quantize transformed and quantized residual subblocks corresponding to the subblocks of the current block to thereby generate transformed residual subblocks; an inverse transform unit to inversely transform the transformed residual subblocks to thereby reconstruct residual subblocks; a prediction unit to sequentially predict the subblocks from neighboring pixels which have been already reconstructed to thereby generate a plurality of predicted subblocks corresponding to the subblocks; and an adder to sequentially reconstruct the subblocks by adding each of the reconstructed residual subblocks to a predicted subblock corresponding thereto, wherein the prediction unit uses one or more pixels of at least one previously reconstructed subblock within the current block as the neighboring pixels.

Growing community of inventors

Seongnam-si, South Korea

HaYoon Kim