摘要:
A video predictive decoding method to be executed by a video predictive decoding device with picture storage means for storing a reference picture to be used for decoding of a subsequent picture, comprising: an input step of accepting input of compressed picture data including a random access picture serving as a picture of random access, the compressed picture data obtained by encoding each of a plurality of pictures constituting a video sequence by a method of either intra-frame prediction or inter-frame prediction, and the input step also accepting input of display order encoded data obtained by encoding data providing display order information of each of the pictures; a restoration step of decoding the compressed picture data to restore a reproduced picture and decoding the display order encoded data to restore the display order information; a picture storage step of storing in the picture storage means the restored reproduced picture as the reference picture to be used for decoding of the subsequent picture; and a memory management step of controlling the picture storage means.
摘要:
A method of decoding encoded pictures may be provided. The method may include computer implemented steps performed by a processor of a computer system to implement the following steps: receiving the encoded pictures and delay time syntaxes associated respectively with the encoded pictures, wherein the delay time syntaxes represent time periods uniquely defined for the individual encoded pictures; decoding the encoded pictures into a decoded pictures; and holding at least some of the decoded pictures in a decoded picture buffer for respective time periods represented by the delay time syntaxes associated with the at least some of the decoded pictures before outputting the at least some of the decoded pictures from the decoded picture buffer for display, wherein the decoded picture buffer holds at least one decoded picture used for reference to decode at least one of the encoded pictures.
摘要:
Enhanced performance of bi-prediction with a smaller amount of coding bits is provided. A predicted signal generation unit (103) provided in a video predictive encoding device includes: a means (122) which estimates a zero-th motion vector for derivation of a zero-th predicted signal, selects a zero-th motion vector predictor similar to the zero-th motion vector, and generates zero-th side information containing a zero-th motion vector predictor index to identify the motion vector predictor and a motion vector difference determined from the zero-th motion vector and the zero-th motion vector predictor; a means (121) which selects a motion vector for generation of a first predicted signal having a high correlation with a target region, which generates first side information containing a first motion vector predictor index to identify the motion vector as a first motion vector predictor, and which sets the first motion vector predictor to a first motion vector; and a means (123) which combines the zero-th and first predicted signals to generate a predicted signal of the target region.
摘要:
A video prediction encoding device provided with a picture storage unit storing, as reference pictures to be used for encoding of a subsequent picture, one or more of reconstructed pictures restored from compressed picture data and a memory control unit to control a frame memory in the picture storage unit. When a frame size of input pictures is not more than 1/(2^L) (where L is an integer of one or more) of a maximum frame size of pictures, the memory control unit determines that (2^L) times the maximum number of reconstructed pictures are storable in the frame memory.
摘要:
A picture encoding device (100) is provided, which includes: a unit (110) for selecting a division method of a target region from among a plurality of division methods, and a unit (104) for dividing the target region into a plurality of small regions using the division method, generating a prediction signal in the small region, generating a residual signal between the prediction signal and the original signal of the small region, generating quantized transform coefficients by performing frequency transform and quantization of the residual signal, selecting a map from among a plurality of maps for mapping the quantized transform coefficients of the small region onto leaves of a tree structure that is common to the plurality of division methods in accordance with attribute information of the small region, mapping the quantized transform coefficients of the small region onto the leaves of the tree structure based on the map, and updating the states of the nodes and leaves of the tree structure according to the coefficient values of the respective leaves. The picture encoding device (100) also includes a unit (105) for encoding the states of the nodes and the leaves using a probability model that is common to the plurality of division methods, and a unit (106) for encoding non-zero quantized transform coefficients of the small region.
摘要:
In the motion compensation prediction unit 2 of the video encoding apparatus 1, complexity information which indicates a degree of complexity of movement from the reference frame for each of the plurality of blocks in which a coding target image is divided. The predicted image is generated by using a prediction reference image to which filtering pixels are provided in accordance with the complexity information on the basis of a predetermined rule which increases the number of the filtering pixels which have pixel values produced by applying low-pass filter with strong high-frequency cutoff characteristics among a plurality of low-pass filters with different high-frequency cutoff characteristics to neighborhood integer pixels.
摘要:
In the motion compensation prediction unit 2 of the video encoding apparatus 1, complexity information which indicates a degree of complexity of movement from the reference frame for each of the plurality of blocks in which a coding target image is divided. The predicted image is generated by using a prediction reference image to which filtering pixels are provided in accordance with the complexity information on the basis of a predetermined rule which increases the number of the filtering pixels which have pixel values produced by applying low-pass filter with strong high-frequency cutoff characteristics among a plurality of low-pass filters with different high-frequency cutoff characteristics to neighborhood integer pixels.
摘要:
An objective is to provide an image predictive encoding device, image predictive encoding method, image predictive encoding program, image predictive decoding device, image predictive decoding method, and image predictive decoding program for selecting a plurality of candidate prediction signals, without increase in information amount. A weighting unit 234 and an adder 235 process pixel signals extracted by a prediction adjacent region extractor 232 by a predetermined synthesis method, for example, by averaging to generate a comparison signal to an adjacent pixel signal for each combination. A comparison-selection unit 236 selects a combination with a high correlation between the comparison signal generated by the weighting unit 234 and others and the adjacent pixel signal acquired by a target adjacent region extractor 233. A prediction region extractor 204, weighting unit 205, and adder 206 generate candidate prediction signals and process them by a predetermined synthesis method to generate a prediction signal.