Abstract:
A method and device of intra-edge/intra-midpoint prediction is disclosed, comprising determining a plurality of sent pixels. The set of sent pixels may be determined by union of the edge pixels locations and the midpoint pixels locations. An image frame is divided into a plurality of pixel blocks having a predetermined size. Then, the method includes determining whether at least one of the pixels within each pixel bock is within the plurality of sent pixels.
Abstract:
A method of inter-edge/inter-midpoint prediction is disclosed. The method utilizes previous frame data (PFD). A search radius, r, is initialized as having a value of one. Then, the step of scanning around a co-located point in the previous frame data using the search radius is performed. Finally, it is determined whether a reference point is found.
Abstract:
It is hereby disclosed an image coding method for block-wise coding a digital image divided into a plurality of blocks, wherein each block is a two-dimensional block and has a plurality of pixels, the method coding each block as a target block by applying the steps of: determining (1) mode information (12) indicating a coding mode showing a status of pixels of a target block; and coding (3) pixel data of the target block, using the determined mode information (12) of the target block, characterized by coding (2) the determined mode information (12) on a per target block basis, by referring to the mode information of a plurality of previously coded blocks, each of which is adjacent to the target block within the same picture, and wherein the mode information indicating a coding mode, which is dominant in the plurality of previously coded blocks, is encoded with a shorter codeword than other mode information. Also the corresponding image encoder is hereby disclosed.
Abstract:
An image decoding apparatus which decodes externally received encoded image information includes a storage unit (104) which stores the image information. The image decoding apparatus includes a first decoding unit (203) which receives, from the storage unit, image data to be decoded and reference data, and decodes the target image data. The image decoding apparatus includes a second decoding unit (204) which receives the image data decoded by the first decoding unit, receives, from the storage unit, image data to be decoded based on the decoded image data, and decodes the image data received from the storage unit. The image decoding apparatus includes a decoding control unit (205) which controls the first and second decoding units to repetitively execute decoding of image data in parallel.
Abstract:
The mode data of a block to be coded is predicted from the mode data of peripheral blocks already coded, and coded using a code word table switched according to a hitting ratio of prediction. In the code word table, the code word length is set shorter for coding modes with high hitting ratio.
Abstract:
The mode data of a block to be coded is predicted from the mode data of peripheral blocks already coded, and coded using a code word table switched according to a hitting ratio of prediction. In the code word table, the code word length is set shorter for coding modes with high hitting ratio.