摘要:
An intraprediction encoding and decoding apparatus and method to improve compression efficiency are provided. A video encoding method includes dividing an input video of a predetermined size into at least two sub-planes, performing intraprediction encoding on at least one of the divided at least two sub-planes, and performing interprediction encoding on at least one of the remaining sub-planes by using the intraprediction encoded sub-plane as a reference sub-plane.
摘要:
An image compression method and apparatus, in which coding efficiency is improved by coding multiple pictures through cross-reference between the pictures, and an image decompression method and apparatus. The image compression method includes dividing each of the pictures into predetermined slices, determining a prediction mode having higher efficiency and a coding order for each of corresponding slices of the pictures by performing prediction on the corresponding slices, and coding each of the slices in the determined prediction mode according to the determined order of coding. The pictures are coded through cross-reference between them.
摘要:
A method of controlling a terminal of the MPEG-4 system to enable to faster reproduce the selected contents through a caching mechanism includes, if the contents to be reproduced is selected, the terminal of the MPEG-4 system receives an initial object descriptor of the selected contents from a server, and then determines an object of stream and the priority based on the initial object descriptor, object descriptor, and a scene description. A random object is stored in the cache at the point of reproducing the random object constituting the contents. If a final update time of the object stored in the cache is identical with that of the object existing in the server, the object requested to be reproduced from the cache is reproduced. Accordingly, the method makes it possible to more promptly reproduce the contents requested by a user and to provide more stable contents to the user.
摘要:
A method and apparatus for video encoding/decoding provides a macroblock used as a unit of video division and encoding formed in various sizes, positions, and shapes to improve compression efficiency according to video characteristics. The video encoding method, divides a video into macroblocks while moving macroblocks in each row and/or each column by a predetermined-size pixel and each of the macroblocks is encoded. A video may also be divided into macroblocks at a position spaced apart from a corner of the video by a predetermined offset and each of the macroblocks is encoded. Encoding may also be performed on each sub-block and sub-blocks having the same prediction mode may be grouped into a macroblock having another form.
摘要:
An intraprediction encoding and decoding apparatus and a method thereof are provided to improve compression efficiency. A video encoding method includes dividing an input video into a plurality of sub-planes based on a spatial characteristic of the input video, performing intraprediction encoding on at least a first sub-plane of the plurality of sub-planes, and performing interprediction encoding on at least a second sub-plane of the plurality of sub-planes based on the intraprediction encoded first sub-plane.
摘要:
A method of dividing an input image into a plurality of one-dimensional images, each including a plurality of pixels having similar characteristics, and encoding the input image in units of one-dimensional images to enhance encoding efficiency. The image encoding method includes: dividing an input image into a plurality of one-dimensional codes, each including at least one pixel selected according to pixel characteristics; creating a plurality of one-dimensional code information, each comprising information regarding the at least one pixel included in each of the one-dimensional codes; and encoding the one-dimensional code information in units of one-dimensional codes.
摘要:
An image compression method and apparatus, in which coding efficiency is improved by coding a plurality of pictures through cross-reference between the pictures, and an image decompression method and apparatus. The image compression method includes dividing each of a plurality of pictures into predetermined slices, determining a prediction mode having higher efficiency and a coding order for each of corresponding slices of the pictures by performing prediction on the corresponding slices, and coding each of the slices in the determined prediction mode according to the determined order of coding. The plurality of pictures is coded through cross-reference between them.
摘要:
An intraprediction encoding/decoding method and apparatus are provided. The intraprediction encoding method includes forming a flipped reference block by flipping pixels of a reference block used for intraprediction symmetrically with respect to a straight line of a predetermined direction passing through the center of the reference block, and performing intraprediction using the flipped reference block.
摘要:
An MPEG data receiving apparatus adapted to interact with a MPEG data providing apparatus. A storage unit stores scene description information (SDI) from a received MPEG stream and a command recognition unit outputs node identification information based on user-selected objects and scene correction commands input by the user. A correcting unit searches for SDI stored in the storage unit corresponding to the scene correction commands and selectively updates the SDI on the object or requests the MPEG stream providing apparatus to update the SDI corresponding to the scene correction commands according to a result of determining whether the SDI corresponding to the scene correction commands exists in the storage unit. Accordingly, interaction between the MPEG data receiving apparatus and the MPEG data providing apparatus is enabled. Effective results are obtainable under a narrow bandwidth environment by reducing an amount of SDI transmitted from the providing apparatus.
摘要:
An intraprediction method which improves compression efficiency using the symmetry of a video in the intraprediction of the video and a video encoding and decoding method and apparatus using the intraprediction method. The intraprediction method includes performing intraprediction by predicting a first region to be encoded in a video based on axial symmetry of a second region of the video with respect to a predetermined axis.