| CPC H04N 19/13 (2014.11) [H04N 19/137 (2014.11); H04N 19/197 (2014.11)] | 4 Claims |
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1. A three-dimensional (3D) data decoding apparatus for decoding coded data, the 3D data decoding apparatus comprising:
an arithmetic decoder configured to arithmetically decode mesh displacement from the coded data;
a context selection unit configured to select a context in the arithmetic decoding; and
a context initialization unit configured to set an initial value of the context, wherein
in the context initialization unit, a context initialization parameter for initializing the context is decoded from the coded data,
the context initialization parameter includes initialization timing information indicating initialization timing of the context, and
in a case that the initialization timing information includes a first value, the context initialization unit initializes the context only in a case of a start of a segment and a random access point, and in a case that the initialization timing information includes a second value, the context initialization unit invariably initializes the context at the start of the segment.
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