发明名称 |
IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, AND IMAGE DECODING APPARATUS |
摘要 |
An image coding method includes: deriving a candidate for a motion vector predictor from a co-located motion vector; adding the candidate to a list; selecting the motion vector predictor from the list; and coding a current block and coding a current motion vector, wherein the deriving 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. |
申请公布号 |
US2016241872(A1) |
申请公布日期 |
2016.08.18 |
申请号 |
US201615140673 |
申请日期 |
2016.04.28 |
申请人 |
Sun Patent Trust |
发明人 |
WAHADANIAH Viktor;LIM Chong Soon;NAING Sue Mon Thet;SUN Hai Wei;SUGIO Toshiyasu;NISHI Takahiro;SASAI Hisao;SHIBAHARA Youji;TANIKAWA Kyoko;MATSUNOBU Toru;TERADA Kengo |
分类号 |
H04N19/56;H04N19/172;H04N19/176 |
主分类号 |
H04N19/56 |
代理机构 |
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代理人 |
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主权项 |
1. A motion vector predictor deriving method of deriving a motion vector predictor for each block among blocks of pictures, the motion vector predictor deriving method comprising:
encoding classification information of pictures from a coded stream; deriving a candidate for a motion vector predictor to be used in coding of a motion vector for a current block to be coded, from a motion vector of a collocated block included in a collocated picture, the collocated picture being different from a current picture that includes the current block; and adding the derived candidate to a list of candidates, wherein a reference picture of the current block is different from the collocated picture, and wherein the deriving includes: determining, based on the classification information, whether the reference picture of the current block is a long-term reference picture or a short-term reference picture, and whether a reference picture of the collocated block is a long-term reference picture or a short-term reference picture; deriving the candidate by directly setting the motion vector of the collocated block as the candidate without scaling based on a temporal distance in the case of determining that each of the reference picture of the current block and the reference picture of the collocated block is a long-term reference picture; and deriving the candidate from the motion vector of the collocated block by scaling the motion vector based on a temporal distance in the case of determining that each of the reference picture of the current block and the reference picture of the collocated block is a short-term reference picture. |
地址 |
New York NY US |