Abstract:
The image decoding method includes: determining a context for use in a current block, from among a plurality of contexts (S204); and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context (S210), wherein in the determining (S204): the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block (S206); and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type (S207), and the second type is one of "mvd_I0" and "mvd_I1".
Abstract:
An image coding method bitstream includes: determining a maximum number of a merging candidate which is a combination of a prediction direction, a motion vector, and a reference picture index for use in coding of a current block (S201); deriving a first merging candidate (S202); determining whether or not a total number of the first merging candidate is smaller than the maximum number (S204); deriving a second merging candidate when it is determined that the total number of the first merging candidate is smaller than the maximum number (S205); selecting a merging candidate for use in the coding of the current block from the first merging candidate and the second merging candidate (S206); and coding, using the maximum number, an index for identifying the selected merging candidate, and attaching the coded index to the bitstream (S207).
Abstract:
A video encoding method using a plurality of reference pictures includes: selecting (300) whether or not a resilient picture referencing scheme is to be used for encoding video; writing (302) a parameter indicating the selection into a header of an encoded video bitstream; and encoding (304) a picture using inter-picture prediction using a result of the selection.
Abstract:
An image coding method according to the present invention partitions an input image signal (120) into processing units, and codes the partitioned image to generate a code sequence (140), the image coding method including: determining a partitioning pattern for hierarchically partitioning the input image signal (120) in order starting from a largest unit of the processing units; generating partition information (131) indicative of the partitioning pattern; and coding partition information (131), wherein the partition information (131) includes maximum used hierarchy depth information (used_max_depth) indicative of a maximum used hierarchy depth which is a hierarchy depth of a deepest processing unit of the processing units included in the partitioning pattern.
Abstract:
A data transmission method according to one aspect of the present disclosure includes: generating a plurality of MPUs, reference clock time information, and leading clock time information indicating a leading PTS that is a clock time at which a leading access unit in the MPU is presented, transmitting the generated plurality of MPUs, reference clock time information, and leading clock time information, wherein the leading clock time information indicates the leading PTS of the plurality of MPUs of which presentation is started after the leading clock time information is transmitted in the generated plurality of MPUs, and each of the generated plurality of MPUs indicates a time point at which each access unit that does not exist in a head of the MPU is presented as a relative value to a time point of another access unit in the MPU.
Abstract:
A transmission method for transmitting encoded data obtained by hierarchically encoding a video image includes: generating an encoded stream that includes time information and the encoded data, the time information indicating a time at which decoding or displaying processing of the encoded data is performed, and transmitting the generated encoded stream, wherein the encoded data includes a plurality of sets each including a plurality of access units and the time information includes first time information which indicates a time at which the processing performed on a first access unit of the first set is performed and which is based on a reference clock, and second time information used to specify a time at which the processing performed on a second access unit of the second set is performed and which is based on the reference clock.