摘要:
Disclosed is a motion estimation apparatus and method capable of reduce a memory bandwidth by accessing reference image data occupying the largest part of the memory bandwidth based on a result of motion estimation skip determination. The motion estimation apparatus includes a motion estimation skip determination unit, a sum absolute of absolute difference (SAD) processing unit and a multiplexer (MUX) unit. The motion estimation skip determination unit determines the presence of motion estimation skip by reading current image data and skip reference image data, and outputs a motion vector in a skip mode. The SAD processing unit calculates an SAD value by reading the current image data and reference image data and outputs a motion vector in a normal mode. The MUX unit outputs the motion vector in the skip mode or the motion vector in the normal mode as a final motion vector based on a skip flag signal.
摘要:
There is provided a method and apparatus for accessing a memory according to a processor instruction. The apparatus includes: a stack offset extractor extracting an offset value from a stack pointer offset indicating a local variable in the processor instruction; a local stack storage including a plurality of items, each of which is formed of an activation bit indicating whether each item is activated, an offset storing an offset value of a stack pointer, and an element storing a local variable value of the stack pointer; an offset comparator comparing the extracted offset value with an offset value of each item and determining whether an item corresponding to the extracted offset value is present in the local stack storage; and a stack access controller controlling a processor to access the local stack storage or a cache memory according to a determining result of the offset comparator.
摘要:
Provided is a method for partitioning a block in inter prediction including selecting one standard reference frame from at least one reference frame which is a comparison target in inter prediction, searching whether or not a higher-level macroblock of a current frame is partitioned based on the selected standard reference frame, determining a partition size of the higher-level macroblock of the current frame, searching whether or not the higher-level macroblock in which the partition size is determined is partitioned by comparing with any certain reference frame other than the standard reference frame, and stopping a block size search on the higher-level macroblock of the current frame if a partition size of the higher-level macroblock of the current frame determined by comparing with the standard reference frame and a partition size of the higher-level macroblock of the current frame determined by comparing with the certain reference frame are different from each other.
摘要:
Provided is an adaptive motion search range determining apparatus and method for encoding UHD-class high-resolution images. The adaptive motion search range determining apparatus includes an MVD average/standard deviation calculation unit calculating an value average and a standard deviation of MVDs of neighboring macroblocks of a current macroblock, and a motion search range determination unit determining a motion search range of the current macroblock using the value average and the standard deviation. According to the adaptive motion search range determining apparatus, it is possible to enable each macroblock to have an adaptive search range by variably adjusting a motion vector search range of a current macroblock with reference to motion vectors of neighboring macroblocks of the current macroblock.
摘要:
A method for managing a frame memory includes: determining a frame memory structure with reference to memory configuration information and image processing information; configuring a frame memory such that a plurality of image signals are stored in each page according to the frame memory structure; and computing a signal storage address by combining image acquiring information by bits, and accessing a frame memory map to write or read an image signal by pages.
摘要:
A method for extracting a probability model value from a probability model table and a method and apparatus for decoding a symbol value using the same are provided. The method for extracting a probability model value from a probability model table includes: segmenting and reducing a probability model table including a plurality of probability model values; disposing indexes on the basis of the segmented and reduced probability model table; and searching the probability model table for a probability model value by using the disposed indexes.
摘要:
Disclosed are a multiprocessor-based video decoding apparatus and method. The multiprocessor-based video decoding apparatus includes: a stream parser dividing an input stream by row and parsing a skip counter and a quantization parameter of the input stream; and a plurality of processors acquiring the plurality of divided streams, the skip counter, and the quantization parameter generated by the stream parser, acquiring decoded information of an upper processor among neighboring processors by row, and parallel-decoding the plurality of divided streams by row. Decoding of an input stream can be parallel-processed by row.
摘要:
Provided is a table generation method of decoding a variable-length code. The table generation method includes receiving a variable-length code table and a search width N, generating a K-ary tree from the variable-length code table and the search width N, and generating an N-bit code table from the K-ary tree.
摘要:
Provided are a multi-processor system and a multi-processing method in the multi-processor system. The multi-processor system comprises a plurality of processors each including a data core and a processing core; and switches connecting the data core to the processing core in each of the processors as a combination of a data core-processing core pair. Therefore, the multi-processor system may be useful to remove any overhead for communications and make programming easy and simple.
摘要:
A video encoding apparatus and method using a pipeline technique with a variable time slot are provided. More particularly, a video encoding apparatus and method capable of shortening a video encoding time by variably adjusting lengths of time slots when an H.264 video encoding process is performed in a pipeline structure are provided. The video encoding apparatus includes a plurality of functional blocks that perform video encoding steps based on an H.264 standard for macroblocks configuring input digital video signals in a pipeline structure, and a controller that controls lengths of time slots configuring the pipeline structure based on done signals received from the plurality of functional blocks. Lengths of time slots can be adjusted according to operation times of video encoding steps using done signals generated from functional blocks, thereby preventing unnecessary power consumption and delays when using a fixed-length time slot.