Abstract: An apparatus for decoding video data, the apparatus comprising an entropy decoder configured to separate at least motion information, a quantization parameter and a quantized coefficient sequence from a coded bit stream by decoding the coded bit stream; an inverse quantizer/inverse transformer configured to convert the quantized coefficient sequence to a quantization block using a scan pattern, inversely quantize coefficients of the quantization block using the quantization parameter to generate a transform block, and inversely transform the transform block to generate a residual block; and a motion compensation predictor configured to generate a prediction block of a current prediction unit using a reference index and a motion vector derived from the motion information, wherein the inverse quantizer/inverse transformer inversely quantizes the coefficients of the quantization block by selecting two effective quantization parameters that are available and exist among left, upper, and previous quantization para

Abstract: A method of decoding an image in a merge mode, the method including deriving, by a motion compensation predictor, motion information using effective spatial and temporal merge candidates of a current prediction unit; generating, by the motion compensation predictor, a prediction block of the current prediction unit using the motion information; entropy decoding, by an entropy decoder, a bitstream to generate a quantized coefficient sequence, inversely scanning, by an inverse quantizer/inverse transformer, the quantized coefficient sequence to generate a quantized block, inversely quantizing, by the inverse quantizer/inverse transformer, the quantized block to generate a transformed block using a quantization parameter, and inversely transforming, by the inverse quantizer/inverse transformer, the transformed block to generate a residual block; and generating, by an adder, a reconstructed block using the prediction block and the residual block, wherein a motion vector of the temporal merge candidate is a motion

Abstract: A method of decoding video data, the method including via a motion compensation predictor generating a prediction block of a current prediction unit using a reference index and a motion vector of the current prediction unit; via an entropy decoder, entropy decoding a bitstream to generate a quantized coefficient sequence; via an inverse quantizer/inverse transformer, generating a quantized block using the quantized coefficient sequence and inversely quantizing the quantized block to generate a transformed block using a quantization parameter, and inversely transforming the transformed block to generate a residual block, wherein the inverse quantizer/inverse transformer generates the quantization block by selecting two effective quantization parameters that are available and exist among left, upper, and previous quantization parameters according to an order of priority levels set for the left, upper, and previous quantization parameters and using an average of the two effective quantization parameters; and via

Abstract: A transmission method for data comprising a bitstream for an image, the method including obtaining the bitstream for the image; and transmitting the data comprising the bitstream, wherein the bitstream is decoded by a decoding device, wherein the image decoding device is configured to derive, by a motion compensation predictor, motion information using effective spatial and temporal merge candidates of a current prediction unit; generate, by the motion compensation predictor, a prediction block of the current prediction unit using the motion information; entropy decode, by an entropy decoder, a bit stream to generate a quantized coefficient sequence, inversely scan, by an inverse quantizer/inverse transformer, the quantized coefficient sequence to generate a quantized block, inversely quantize, by the inverse quantizer/inverse transformer, the quantized block to generate a transformed block using a quantization parameter, and inversely transform, by the inverse quantizer/inverse transformer, the transformed b

Abstract: A decoding device configured to decode video data, the device including a motion compensation predictor configured to generate a prediction block of a current prediction unit using a reference index and a motion vector of the current prediction unit; an entropy decoder configured to entropy decode a bitstream to generate a quantized coefficient sequence; an inverse quantizer/inverse transformer configured to generate a quantized block using the quantized coefficient sequence and inversely quantize the quantized block to generate a transformed block using a quantization parameter, and inversely transform the transformed block to generate a residual block, wherein the inverse quantizer/inverse transformer generates the quantization block by selecting two effective quantization parameters that are available and exist among left, upper, and previous quantization parameters according to an order of priority levels set for the left, upper, and previous quantization parameters and by using an average of the two effe

Abstract: An apparatus for decoding video data and including an entropy decoder configured to separate at least an intra mode index, motion information, a quantization parameter and a quantized coefficient sequence from a coded bit stream by decoding the coded bit stream; an inverse quantizer/inverse transformer configured to convert the quantized coefficient sequence to a quantization block, inversely quantize coefficients of the quantization block using the quantization parameter to generate a transform block, and inversely transform the transform block to generate a residual block; an intra predictor configured to restore an intra prediction mode of a current prediction unit using the intra mode index and generate a prediction block of the current prediction unit according to the intra prediction mode when the coded bit stream is coded in the intra prediction mode; and a motion compensation predictor configured to generate a prediction block of a current prediction unit using a reference index and a motion vector de

Abstract: An apparatus for decoding video data, the apparatus comprising an entropy decoder configured to separate at least motion information, a quantization parameter and a quantized coefficient sequence from a coded bit stream by decoding the coded bit stream; an inverse quantizer/inverse transformer configured to convert the quantized coefficient sequence to a quantization block using a scan pattern, inversely quantize coefficients of the quantization block using the quantization parameter to generate a transform block, and inversely transform the transform block to generate a residual block; and a motion compensation predictor configured to generate a prediction block of a current prediction unit using a reference index and a motion vector derived from the motion information, wherein the inverse quantizer/inverse transformer inversely quantizes the coefficients of the quantization block by selecting two effective quantization parameters that are available and exist among left, upper, and previous quantization para

Abstract: A device configured to encode video data is discussed. The device includes a generator configured to generate a prediction block of a current prediction unit using a reference index and a motion vector of the current prediction unit, and a residual block using a difference between the current prediction unit and the prediction block; a transformer configured to transform the residual block to generate a transform block; a quantizer configured to quantize coefficients of the transform block to generate a quantization block using a quantization parameter. Further, the quantizer generates the quantization block by selecting two effective quantization parameters that are available and exist among left, upper, and previous quantization parameters according to an order of priority levels set for the left, upper, and previous quantization parameters and using an average of the two effective quantization parameters; and an entropy-coder configured to entropy-code the quantization block using a scan pattern.

Abstract: A method for encoding an image includes determining an intra prediction mode of a current block; generating a prediction block of the current block according to the intra prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block, wherein the generating the prediction block of the current block according to the intra prediction mode includes: generating reference pixels on an unavailable position if there exist unavailable reference pixels of the current block; determining whether reference pixels of the current block are filtered or not based on the intra prediction mode and a block size of the current block; filtering the reference pixels of the current block using a filter if it is determined that the reference pixels of the current block are filtered, wherein the

Abstract: An apparatus for decoding video data and including an entropy decoder configured to separate at least an intra mode index, motion information, a quantization parameter and a quantized coefficient sequence from a coded bit stream by decoding the coded bit stream; an inverse quantizer/inverse transformer configured to convert the quantized coefficient sequence to a quantization block, inversely quantize coefficients of the quantization block using the quantization parameter to generate a transform block, and inversely transform the transform block to generate a residual block; an intra predictor configured to restore an intra prediction mode of a current prediction unit using the intra mode index and generate a prediction block of the current prediction unit according to the intra prediction mode when the coded bit stream is coded in the intra prediction mode; and a motion compensation predictor configured to generate a prediction block of a current prediction unit using a reference index and a motion vector de

Abstract: A method for encoding an image includes determining an intra-prediction mode of a current block; generating a prediction block of the current block according to the intra-prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block.

Abstract: A method for encoding an image includes determining an intra prediction mode of a current block; generating a prediction block of the current block according to the intra prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block.

Abstract: A method for encoding an image includes determining an intra prediction mode of a current block; generating a prediction block of the current block according to the intra-prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block.

Abstract: A method for encoding an image includes determining an intra prediction mode of a current block; generating a prediction block of the current block according to the intra-prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block.

Abstract: A method for encoding an image includes determining an intra prediction mode of a current block; generating a prediction block of the current block according to the intra-prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block.

Abstract: A method for encoding an image includes determining an intra prediction mode of a current block; generating a prediction block of the current block according to the intra-prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block.

Abstract: A method for encoding an image includes determining an intra prediction mode of a current block; generating a prediction block of the current block according to the intra-prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block.

Abstract: A method for encoding an image includes determining an intra prediction mode of a current block; generating a prediction block of the current block according to the intra prediction mode; generating a residual block by calculating a difference between the current block and the prediction block; transforming the residual block to generate a transform block; quantizing the transform block to generate a quantized block; and entropy-coding coefficients of the quantized block.

Abstract: A device configured to encode video data is discussed. The device includes a generator configured to generate a prediction block of a current prediction unit using a reference index and a motion vector of the current prediction unit, and a residual block using a difference between the current prediction unit and the prediction block; a transformer configured to transform the residual block to generate a transform block; a quantizer configured to quantize coefficients of the transform block to generate a quantization block using a quantization parameter. Further, the quantizer generates the quantization block by selecting two effective quantization parameters that are available and exist among left, upper, and previous quantization parameters according to an order of priority levels set for the left, upper, and previous quantization parameters and using an average of the two effective quantization parameters; and an entropy-coder configured to entropy-code the quantization block using a scan pattern.

Abstract: Disclosed is an apparatus for decoding motion information in merge mode for reconstructing a moving picture signal coded at a low data rate while maintaining a high quality of an image. The apparatus for decoding motion information in merge mode discloses the position of a merge mode candidate and the configuration of a candidate in order to predict motion information in merge mode efficiently. Furthermore, a merge candidate indicated by the merge index of a current block can be efficiently reconstructed irrespective of a network environment by adaptively generating a merge candidate based on the number of valid merge candidate.