Abstract:
A moving picture coding apparatus (100) includes an intra-inter prediction unit (107) which calculates a second motion vector by performing a scaling process on a first motion vector of a temporally neighboring corresponding block, when selectively adding, to a list, a motion vector of each of one or more corresponding blocks each of which is either a block included in a current picture to be coded and spatially neighboring a current block to be coded or a block included in a picture other than the current picture and temporally neighboring the current block, determines whether the second motion vector has a magnitude that is within a predetermined magnitude or not within the predetermined magnitude, and adds the second motion vector to the list when the intra-inter prediction unit determines that the second motion vector has a magnitude that is within the predetermined magnitude range.
Abstract:
The moving picture coding method for coding an input image includes: converting a value of a first parameter into a first binary signal, the first parameter identifying a type of a sample offset process to be applied to a reconstructed image corresponding to the input image (S301); and coding at least a portion of the first binary signal through bypass arithmetic coding using a fixed probability (S302).
Abstract:
An image coding method includes: deriving a candidate for a motion vector predictor from a co-located motion vector (S1301); adding the candidate to a list (S1302); selecting the motion vector predictor from the list (S1303); and coding a current block and coding a current motion vector (S1304), wherein the deriving (S1301) includes: deriving the candidate by a first derivation scheme in the case of determining that each of a current reference picture and a co-located reference picture is a long-term reference picture; and deriving the candidate by a second derivation scheme in the case of determining that each of the current reference picture and the co-located reference picture is a short-term reference picture.
Abstract:
An image coding method according to an aspect of the present invention includes: writing, into a sequence parameter set, buffer description defining information for defining a plurality of buffer descriptions (S102); writing, into the sequence parameter set, reference list description defining information for defining a plurality of reference list descriptions corresponding to the buffer descriptions (S103); and writing, into a first header of each processing unit which is included in a coded bitstream, buffer description selecting information for specifying a selected buffer description (S105).
Title translation:BILDKODIERUNGSVERFAHREN,BILDDEKODIERUNGSVERFAHREN,BILDKODIERUNGSVORRICHTUNG,BILDDEKODIERUNGSVORRICHTUNG SOWIE BILDKODIERUNGS- UND DEKODIERUNGSVORRICHTUNG
Abstract:
An image coding method includes: writing, into a coded bitstream, buffer description defining information for defining a buffer description (S101); constructing a default reference list (S102); reordering pictures included in the default reference list (S103); writing, into the coded bitstream, reference list reordering information for indicating details of the reordering (S104); and coding an image using the buffer description and a reference list resulting from the reordering (S105), and in the reference list reordering information, among the pictures, a picture to be reordered is specified using an index which is used in other processing in the image coding method.
Abstract:
A method of encoding video including: writing a plurality of predetermined buffer descriptions into a sequence parameter set of a coded video bitstream; writing a plurality of updating parameters into a slice header of the coded video bitstream for selecting and modifying one buffer description out of the plurality of buffer descriptions; and encoding a slice into the coded video bitstream using the slice header and the modified buffer description.
Abstract:
An image coding method includes coding first binary data indicating a first intra prediction mode and second binary data indicating a second intra prediction mode (S801), wherein in the coding (S801), a first context adaptive portion which is part of the first binary data and a second context adaptive portion which is part of the second binary data are coded by context adaptive binary arithmetic coding, a first bypass portion which is different part of the first binary data and a second bypass portion which is different part of the second binary data are coded by bypass coding, and coded data is generated which includes the first context adaptive portion, the second context adaptive portion, the first bypass portion, and the second bypass portion, the first bypass portion and the second bypass portion being included subsequent to the first context adaptive portion and the second context adaptive portion.
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 "no_residual_data_flag".