Title translation:BILDKODIERUNGSVERFAHREN,BILDKODIERUNGSVORRICHTUNG,BILDDEKODIERUNGSVERFAHREN,BILDDEKODIERUNGSVORRICHTUNG UND BILDKODIERUNGS- / DEKODIERUNGSVORRICHTUNG
Abstract:
An image coding method includes: determining a maximum number of merging candidates (S601); deriving first merging candidates based on blocks spatially or temporally neighboring a current block (S602); determining whether or not a total number of the first merging candidates is smaller than the maximum number (S604); deriving, by making a combination out of the derived first merging candidates, a second merging candidate for bi-directional prediction when it is determined that the total number of the first merging candidates is smaller than the maximum number (S605); selecting a merging candidate to be used for the coding of the current block from the first merging candidates and the second merging candidate (S606); and coding, using the determined maximum number, an index for identifying the selected merging candidate, and attaching the coded index to the bitstream (S607).
Abstract:
An image encoding method of coding one or more units that are included in a picture, including: generating a first flag indicating whether or not a removal time of encoded data by a hypothetical decoder from a buffer for storing the encoded data is set per unit (S221); generating a second flag indicating whether an interval between removal times of the units is constant or arbitrary when the removal time is set per unit (S222); and generating an encoded bitstream including the encoded data, the first flag, and the second flag (S223).
Abstract:
An image encoding method for encoding a multiview video is provided. The method includes: determining a maximum number of per-picture pixels (127) and a maximum buffer size (128) which corresponds to a maximum number of candidate reference images for use in a non-multiview coding, based on a level signal (126) representing a coding level with reference to a table (T1) (S101); calculating a maximum number of candidate reference views (129) for use in inter-view predictive coding using the maximum number of per-picture pixels (127), an image size of an input image (125), and a scale factor for use in multiview video coding (S102); and calculating an MVC maximum buffer size (130) corresponding to a maximum number of candidate reference images for use in multiview video coding, using the maximum number of views (129), and the maximum buffer size (128) (S103).
Abstract:
An image decoding method includes: restoring a selected prediction mode used in prediction at a time of coding; and decoding a current block included in coded image data to generate a decoded block, according to the prediction based on the selected prediction mode. The restoring includes: determining a first estimated prediction mode; determining a second estimated prediction mode different from the first estimated prediction mode; and restoring the selected prediction mode based on the mode information, the first estimated prediction mode, and the second estimated prediction mode.
Title translation:BILDDECODIERUNGSVERFAHREN,BILDCODIERUNGSVERFAHREN,BILDDECODIERUNGSVORRICHTUNG,BILDCODIERUNGSVORGHHTUNG UND BILDCODIERUNGS- / DECODIERUNGSVORRICHTUNG
Abstract:
An image decoding method of decoding, on a per-block basis, a coded image included in a bitstream, includes: performing arithmetic decoding on a current block to be decoded (S101); determining whether or not the current block is at the end of a slice(S103); determining, when it is determined that the current block is not at the end of the slice, whether or not the current block is at the end of a sub-stream which is a structural unit of the image that is different from the slice (S105); and performing arithmetic decoding on a sub-last bit and performing arithmetic decoding termination, when it is determined that the current block is at the end of the sub-stream (S106).
Abstract:
An image coding method includes: deriving a candidate for a motion vector predictor from a neighboring motion vector (S1201); adding the candidate to a list (S1202); selecting a motion vector predictor from the list; coding a current block (S1203); and coding a current motion vector (S1204). In the deriving (S1201), the candidate is derived according to a first derivation scheme when each of a current reference picture and a neighboring reference picture is determined to be a long-term reference picture, and the candidate is derived according to a second derivation scheme when each of a current reference picture and a neighboring reference picture is determined to be a short-term reference picture.
Abstract:
An image encoding method according to an aspect of the present invention includes: generating, from a plurality of first sub-bitstreams which are obtained by encoding a plurality of images on a per layer basis according to spatial scalable image encoding, a second sub-bitstream including two or more first sub-bitstreams corresponding to two or more layers, the two or more first sub-bitstreams being included in the plurality of first sub-bitstreams; and generating a descriptor including a first field indicating a minimum value for two or more layer identifiers indicating the two or more layers and a second field indicating a maximum value for the two or more layer identifiers.
Abstract:
A moving picture coding method for calculating a motion vector predictor to be used when coding a motion vector of a current block, and coding the current block includes: (S102) obtaining motion vector predictor candidates a fixed number of which is two or more; (S103) selecting the motion vector predictor to be used for coding the motion vector of the current block, from among the motion vector predictor candidates the fixed number of which is two or more; and (S104) coding an index for identifying the selected motion vector predictor according to the fixed number of two or more, wherein the motion vector predictor candidates the fixed number of which is two or more include one or more candidates each having a predetermined second fixed value.