Abstract: Disclosed herein is a multi-channel direct memory access (DMA) controller. The DMA controller includes: a register which stores control information and an operation state of each of a plurality of direct memory access (DMA) channels; a transmission processor which controls flow of transmission and reception of data such that all of the DMA channels requesting DMA transmission cyclically repeat unit transmission with reference to the register; and a transmission sequence control unit which controls the transmission processor such that the transmission sequence of each of the DMA channels is determined in a circulation cycle of unit transmission by reflecting priority information of the respective DMA channels stored in the register.

Abstract: A device for eliminating a block artifact phenomenon of a decoded image frame, and an eliminating method thereof. A method for eliminating a block artifact phenomenon according to the present invention includes: extracting pixel information including a magnitude of edge response, an edge direction, and an edge position, by applying an edge detector to an arbitrary pixel in an image frame; distinguishing the pixel into a non-edge pixel, an object edge pixel, or a block edge pixel by using the extracted pixel information; and performing filtering according to the distinguishing result. In this manner, an object edge information is selectively protected, so that an improved image quality may be provided.

Abstract: Provided is a fast mode-searching apparatus and method for motion-prediction. The fast mode-searching apparatus includes a probability information obtaining unit, a first inter mode searching unit, a second inter mode searching unit, and a selective intra mode searching unit. The probability information obtaining unit detects whether at least one of a macroblock of a previous frame, a macroblock of a current frame, and adjacent macroblocks corresponds to at least one of P16×16, P16×8, and P8×16. The first inter mode searching unit performs an inter mode search on a block that is not detected by the probability information obtaining unit. The second inter mode searching unit determines whether the macroblock of the current frame corresponds to P16×16 as a result of performing the inter mode search on a block detected by the probability information obtaining unit. The selective intra mode searching unit performs an intra mode search if the macroblock of the current frame corresponds to P16×16.

Abstract: A fast motion estimation apparatus and method in which motion estimation is carried out on a current block of a current frame of video image data with reference to a corresponding matching block of a previous frame are provided.

Abstract: A device for eliminating a block artifact phenomenon of a decoded image frame, and an eliminating method thereof. A method for eliminating a block artifact phenomenon according to the present invention includes: extracting pixel information including a magnitude of edge response, an edge direction, and an edge position, by applying an edge detector to an arbitrary pixel in an image frame; distinguishing the pixel into a non-edge pixel, an object edge pixel, or a block edge pixel by using the extracted pixel information; and performing filtering according to the distinguishing result. In this manner, an object edge information is selectively protected, so that an improved image quality may be provided.