Abstract: A method of encoding an image in a merge mode, the method including determining motion information of a current prediction unit, and generating a prediction block using the motion information; generating a residual block using an original block and the prediction block, transforming the residual block to generating a transformed block, quantizing the transformed block using a quantization parameter to generate a quantized block, and scanning the quantized block to entropy-code the quantized block; and encoding the motion information using effective spatial and temporal merge candidates of the current prediction unit.

Abstract: A method of decoding an image including deriving, via an intra-predictor, an intra prediction mode; generating, via the intra-predictor, reference pixels on an unavailable position if there exist unavailable reference pixels of a current block; determining, via the intra-predictor, whether reference pixels of the current block are filtered or not based on the derived 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 two or more filters are used based on the block size of the current block such that a filter with a broad bandwidth is applied to a large block; and generating, via the intra-predictor, a prediction block of the current block according to the derived intra prediction mode of the current block and the reference pixels.

Abstract: A method of decoding an image is discussed. The method includes deriving an intra prediction mode, generating reference pixels on an unavailable position if there exist unavailable reference pixels of a current block, determining whether reference pixels of the current block are filtered or not based on the derived intra prediction mode and a block size of the current block, filtering the reference pixels of the current block using a filter; and generating a prediction block of the current block according to the derived intra prediction mode of the current block and the reference pixels. The filter is selected based on the block size of the current block and a difference between reference pixels, and the reference pixels of the current block are not filtered in a vertical mode.

Abstract: A method for generating a prediction block in Advanced Motion Vector Prediction (AMVP) mode to reconstruct a prediction-coded video signal using a motion vector approximate to original motion information. An AMVP candidate list is generated using effective spatial and temporal AMVP candidates for a current Prediction Unit (PU). If the number of the effective AMVP candidates is smaller than a predetermined value, a motion vector having a predetermined value as a candidate to the AMVP candidate list. Then a motion vector corresponding to an AMVP index of the current PU from among motion vectors included in the AMVP candidate list is determined to be a motion vector predictor of the current PU.

Abstract: A method of encoding an image is disclosed. The method comprises determining an intra prediction mode; generating a reference pixel if there exist unavailable reference pixels of a current block; determining whether reference pixels of the current block are filtered or not based on the intra prediction mode and a size of the current block; selecting a filter using the size of the current block and difference between reference pixels and filtering the reference pixels of the current block using the selected filter if it is determined that the reference pixels of the current block are filtered; and generating the prediction block according to the intra prediction mode.

Abstract: A method of encoding an image is discussed. The method includes deriving an intra prediction mode, generating reference pixels on an unavailable position if there exist unavailable reference pixels of a current block, determining whether reference pixels of the current block are filtered or not, filtering the reference pixels of the current block using a filter, wherein two or more filters are used based on the block size of the current block such that a filter with a broad bandwidth is applied to a large block, and generating a prediction block of the current block according to the derived intra prediction mode of the current block and the reference pixels. The filter is selected based on the block size of the current block and a difference between reference pixels, and the reference pixels of the current block are not filtered in a horizontal mode.

Abstract: A method of decoding an image is discussed. The method includes deriving an intra prediction mode, generating reference pixels on an unavailable position if there exist unavailable reference pixels of a current block, determining whether reference pixels of the current block are filtered or not based on the derived intra prediction mode and a block size of the current block, filtering the reference pixels of the current block using a filter; and generating a prediction block of the current block according to the derived intra prediction mode of the current block and the reference pixels. The filter is selected based on the block size of the current block and a difference between reference pixels, and the reference pixels of the current block are not filtered in a vertical mode.

Abstract: A method of decoding an image is disclosed. The method comprises deriving an intra prediction mode; generating reference pixels if there exist unavailable reference pixels of a current block; determining whether reference pixels of the current block are filtered or not based on the intra prediction mode and a size of the current block; selecting a filter using the size of the current block and difference between reference pixels and filtering the reference pixels of the current block using the selected filter if it is determined that the reference pixels of the current block are filtered; and generating the prediction block according to the intra prediction mode.

Abstract: Discussed is a video decoding apparatus including a merge mode motion information decoding unit that decodes motion information if a motion information encoding mode of a current block is a merge mode, a prediction block generation unit that generates a prediction block of the current block using the decoded motion information, and a residual block decoding unit that generates a quantization block by inversely scanning a residual signal to dequantize the quantization block using a quantization step size, and to generate a residual block by inversely transforming the dequantization block.

Abstract: A video coding method for encoding a video signal at a low data rate with high video quality is disclosed. To minimize the number of bits required for a residual signal, invalid reference pixels adjacent to a current block are generated using at least one reconstructed valid reference pixel adjacent to the current block. After valid reference pixels adjacent to the current block and the generated reference pixels are filtered, the intra-prediction mode of the current block is determined. Therefore, since a reference block most approximate to the current block is generated, the amount of data needed for the residual block of the current block can be minimized.

Abstract: Disclosed is an apparatus for decoding motion information in merge mode.

Abstract: Disclosed is an apparatus for decoding motion information in merge mode.

Abstract: Disclosed is an apparatus for decoding motion information in merge mode. The apparatus for decoding motion information in merge mode discloses a merge mode motion vector decoding unit configured to generate motion information using available spatial and temporal merge candidates when a motion information encoding mode of a current block indicates a merge mode; a prediction bock generating unit configured to generate a prediction block of the current block using motion information; and a residual block generating unit configured to perform an entropy-decoding process and an inverse-scanning process on residual signals to generate a quantized block, and to perform an inverse-transforming process on the quantized block to generate a residual block.

Abstract: Disclosed is an apparatus for decoding motion information in merge mode. The apparatus for decoding motion information in merge mode discloses a merge mode motion vector decoding unit configured to generate motion information using available spatial and temporal merge candidates when a motion information encoding mode of a current block indicates a merge mode; a prediction bock generating unit configured to generate a prediction block of the current block using motion information; and a residual block generating unit configured to perform an entropy-decoding process and an inverse-scanning process on residual signals to generate a quantized block, and to perform an inverse-transforming process on the quantized block to generate a residual block.

Abstract: Disclosed is an apparatus for decoding motion information in merge mode.

Abstract: A method of encoding an image is disclosed. The method comprises determining an intra prediction mode; generating a reference pixel if there exist unavailable reference pixels of a current block; determining whether reference pixels of the current block are filtered or not based on the intra prediction mode and a size of the current block; selecting a filter using the size of the current block and difference between reference pixels and filtering the reference pixels of the current block using the selected filter if it is determined that the reference pixels of the current block are filtered; and generating the prediction block according to the intra prediction mode.

Abstract: Disclosed is an apparatus for decoding motion information in merge mode. The apparatus for decoding motion information in merge mode discloses a merge mode motion vector decoding unit configured to generate motion information using available spatial and temporal merge candidates when a motion information encoding mode of a current block indicates a merge mode; a prediction bock generating unit configured to generate a prediction block of the current block using motion information; and a residual block generating unit configured to perform an entropy-decoding process and an inverse-scanning process on residual signals to generate a quantized block, and to perform an inverse-transforming process on the quantized block to generate a residual block.

Abstract: Disclosed is an apparatus for decoding motion information in merge mode. The apparatus for decoding motion information in merge mode discloses a merge mode motion vector decoding unit configured to generate motion information using available spatial and temporal merge candidates when a motion information encoding mode of a current block indicates a merge mode; a prediction bock generating unit configured to generate a prediction block of the current block using motion information; and a residual block generating unit configured to perform an entropy-decoding process and an inverse-scanning process on residual signals to generate a quantized block, and to perform an inverse-transforming process on the quantized block to generate a residual block.

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.

Abstract: A method of decoding an image is disclosed. The method comprises deriving an intra prediction mode; generating reference pixels if there exist unavailable reference pixels of a current block; determining whether reference pixels of the current block are filtered or not based on the intra prediction mode and a size of the current block; selecting a filter using the size of the current block and difference between reference pixels and filtering the reference pixels of the current block using the selected filter if it is determined that the reference pixels of the current block are filtered; and generating the prediction block according to the intra prediction mode.