Abstract: A cache memory system using temporal locality information and a data storage method are provided. The cache memory system including: a main cache which stores data accessed by a central processing unit; an extended cache which stores the data if the data is evicted from the main cache; and a separation cache which stores the data of the extended cache when the data of the extended cache is evicted from the extended cache and temporal locality information corresponding to the data of the extended cache satisfies a predetermined condition.

Abstract: A format conversion apparatus which converts image data of a band interleave format into image data of a band separate format is provided. The apparatus includes a memory which stores image data of a band interleave format; and a converting module which reads the memory by increasing a read address of the memory for each stride, and converts the image data of the band interleave format into image data of a band separate format.

Abstract: A method and system for an early Z test in a tile-based three-dimensional rendering is provided. In the method and system for an early Z test, a portion which is not displayed to a user is removed prior to performing a rasterization process, and thereby performing the 3D rendering efficiently. The method includes segmenting a scene into tiles for performing a rendering with respect to a triangle; selecting a first tile of the tiles, which has a tile Z value less than a minimum Z value of the triangle; and performing the rendering with respect to the triangle in remaining tiles excluding the selected first tile of the tiles.

Abstract: An image interpolation method interpolating image information of a point in a space constructed by a plurality of planes. According to the method, a reliable interpolated value can be rapidly obtained by searching for the nearest plane to the point, obtaining information about a plane facing the nearest plane using image information of one or more vertices of the plane facing the nearest plane, and interpolating the image information of the point using the image information of the one or more vertices of the nearest plane and the obtained information about the plane facing the nearest plane.

Abstract: A method and system for an early Z test in a tile-based three-dimensional rendering is provided. In the method and system for an early Z test, a portion which is not displayed to a user is removed prior to performing a rasterization process, and thereby performing the 3D rendering efficiently. The method includes segmenting a scene into tiles for performing a rendering with respect to a triangle; selecting a first tile of the tiles, which has a tile Z value less than a minimum Z value of the triangle; and performing the rendering with respect to the triangle in remaining tiles excluding the selected first tile of the tiles.

Abstract: Provided is a method for converting a first image signal expressed in a first color space into a second image signal expressed in a second color space on a subword parallelism basis.

Abstract: A memory access method includes: obtaining a, b, and c from a program code for accessing a memory with a triple loop in a program, a being a number of values which an inner-most loop variable of the triple loop may have, b being a number of values which a middle loop variable of the triple loop may have, and c being a number of values which an outer-most loop variable of the triple loop may have; obtaining a starting address of the memory accessed by the triple loop; and obtaining an a×b×c number of addresses of the memory accessed by the triple loop using the starting address and a function.

Abstract: A cache memory system using temporal locality information and a data storage method are provided. The cache memory system including: a main cache which stores data accessed by a central processing unit; an extended cache which stores the data if the data is evicted from the main cache; and a separation cache which stores the data of the extended cache when the data of the extended cache is evicted from the extended cache and temporal locality information corresponding to the data of the extended cache satisfies a predetermined condition.

Abstract: A memory access method includes: obtaining a, b, and c from a program code for accessing a memory with a triple loop in a program, a being a number of values which an inner-most loop variable of the triple loop may have, b being a number of values which a middle loop variable of the triple loop may have, and c being a number of values which an outer-most loop variable of the triple loop may have; obtaining a starting address of the memory accessed by the triple loop; and obtaining an a×b×c number of addresses of the memory accessed by the triple loop using the starting address and a function.

Abstract: A format conversion apparatus which converts image data of a band interleave format into image data of a band separate format is provided. The apparatus includes a memory which stores image data of a band interleave format; and a converting module which reads the memory by increasing a read address of the memory for each stride, and converts the image data of the band interleave format into image data of a band separate format.

Abstract: A method and system for an early Z test in a tile-based three-dimensional rendering is provided. In the method and system for an early Z test, a portion which is not displayed to a user is removed prior to performing a rasterization process, and thereby performing the 3D rendering efficiently. The method includes segmenting a scene into tiles for performing a rendering with respect to a triangle; selecting a first tile of the tiles, which has a tile Z value less than a minimum Z value of the triangle; and performing the rendering with respect to the triangle in remaining tiles excluding the selected first tile of the tiles.

Abstract: An image interpolation method interpolating image information of a point in a space constructed by a plurality of planes. According to the method, a reliable interpolated value can be rapidly obtained by searching for the nearest plane to the point, obtaining information about a plane facing the nearest plane using image information of one or more vertices of the plane facing the nearest plane, and interpolating the image information of the point using the image information of the one or more vertices of the nearest plane and the obtained information about the plane facing the nearest plane.

Abstract: Disclosed is a parallel processing method in a data processing system that temporarily loads data stored in a memory in word registers and parallel-processes subwords constituting the loaded word using Arithmetic Logic Units (ALUs) which are equal in size to the subwords. The method includes generating a shortened subword by removing at least one bit among the bits constituting each subword; and performing parallel computation on the shortened subwords.

Abstract: Provided is a method for converting a first image signal expressed in a first color space into a second image signal expressed in a second color space on a subword parallelism basis.