Abstract: A method for transmitting Channel State Information-Reference Signal (CSI-RS) by a base station includes: transmitting, to a User Equipment (UE), information indicating M CSI-RS antenna ports and resource allocation information of CSI-RS resource configured by aggregating K groups, wherein M and K are integers greater than or equal to 2, respectively; mapping CSI-RSs corresponding to the M CSI-RS antenna ports on the CSI-RS resource; and transmitting, to the UE, the mapped CSI-RSs.

Abstract: In a Multiple-Input Multiple-Output (MIMO) system including a large number of antenna ports, a base station such as a Node B communicates a total number of antenna ports by communicating the number of antenna ports per Channel State Information Reference Signal (CSI-RS) configuration and one or more CSI-RS configurations. A User Equipment determines the number of antenna ports from the information communicated by the base station by determining the number of CSI-RS configurations sent by the base station and multiplying that number by the number of antenna ports per CSI-RS configuration indicated by the base station.

Abstract: A method for transmitting Channel State Information-Reference Signal (CSI-RS) by a base station includes: transmitting, to a User Equipment (UE), information indicating M CSI-RS antenna ports and resource allocation information of CSI-RS resource configured by aggregating K groups, wherein M and K are integers greater than or equal to 2, respectively; mapping CSI-RSs corresponding to the M CSI-RS antenna ports on the CSI-RS resource; and transmitting, to the UE, the mapped CSI-RSs.

Abstract: In a Multiple-Input Multiple-Output (MIMO) system including a large number of antenna ports, a base station such as a Node B communicates a total number of antenna ports by communicating the number of antenna ports per Channel State Information Reference Signal (CSI-RS) configuration and one or more CSI-RS configurations. A User Equipment determines the number of antenna ports from the information communicated by the base station by determining the number of CSI-RS configurations sent by the base station and multiplying that number by the number of antenna ports per CSI-RS configuration indicated by the base station.

Abstract: In a Multiple-Input Multiple-Output (MIMO) system including a large number of antenna ports, a base station such as a Node B communicates a total number of antenna ports by communicating the number of antenna ports per Channel State Information Reference Signal (CSI-RS) configuration and one or more CSI-RS configurations. A User Equipment determines the number of antenna ports from the information communicated by the base station by determining the number of CSI-RS configurations sent by the base station and multiplying that number by the number of antenna ports per CSI-RS configuration indicated by the base station.

Abstract: A method for transmitting Channel State Information-Reference Signal (CSI-RS) by a base station includes: transmitting, to a User Equipment (UE), information indicating M CSI-RS antenna ports and resource allocation information of CSI-RS resource configured by aggregating K groups, wherein M and k are integers greater than or equal to 2, respectively; mapping CSI-RSs corresponding to the M CSI-RS antenna ports on the CSI-RS resource; and transmitting, to the UE, the mapped CSI-RSs.

Abstract: A method for transmitting Channel State Information-Reference Signal (CSI-RS) by a base station includes: transmitting, to a User Equipment (UE), information indicating M CSI-RS antenna ports and resource allocation information of CSI-RS resource configured by aggregating K groups, wherein M and K are integers greater than or equal to 2, respectively; mapping CSI-RSs corresponding to the M CSI-RS antenna ports on the CSI-RS resource; and transmitting, to the UE, the mapped CSI-RSs.

Abstract: Provided are methods and apparatuses for improving compression efficiency in directional intra-prediction. A video encoding apparatus, which does not need to record intra mode information, includes a mode selector that selects one from among a plurality of intra modes on the basis of a directionality of at least one neighboring block that has already been reconstructed before a current block is reconstructed, an intra predictor that obtains a prediction block of the current block from the at least one neighboring block according to the directionality of the selected mode, and obtains a residual block by subtracting the prediction block from the current block, and a unit for encoding the obtained residual block.

Abstract: Provided are methods and apparatuses for improving compression efficiency in directional intra-prediction. A video encoding apparatus, which does not need to record intra mode information, includes a mode selector that selects one from among a plurality of intra modes on the basis of a directionality of at least one neighboring block that has already been reconstructed before a current block is reconstructed, an intra predictor that obtains a prediction block of the current block from the at least one neighboring block according to the directionality of the selected mode, and obtains a residual block by subtracting the prediction block from the current block, and a unit for encoding the obtained residual block.

Abstract: Provided are methods and apparatuses for improving compression efficiency in directional intra-prediction. A video encoding apparatus, which does not need to record intra mode information, includes a mode selector that selects one from among a plurality of intra modes on the basis of a directionality of at least one neighboring block that has already been reconstructed before a current block is reconstructed, an intra predictor that obtains a prediction block of the current block from the at least one neighboring block according to the directionality of the selected mode, and obtains a residual block by subtracting the prediction block from the current block, and a unit for encoding the obtained residual block.