US 12,483,726 B2
3D data decoding apparatus and 3D data coding apparatus
Yasuaki Tokumo, Sakai (JP); Keiichiro Takada, Sakai (JP); Tomohiro Ikai, Sakai (JP); Takeshi Chujoh, Sakai (JP); and Tomoko Aono, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
Filed on Feb. 22, 2024, as Appl. No. 18/583,932.
Claims priority of application No. 2023-110434 (JP), filed on Jul. 5, 2023.
Prior Publication US 2025/0016371 A1, Jan. 9, 2025
Int. Cl. H04N 19/597 (2014.01); H04N 19/46 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/597 (2014.11) [H04N 19/46 (2014.11); H04N 19/91 (2014.11)] 6 Claims
OG exemplary drawing
 
1. A three dimensional (3D) data decoding apparatus for decoding coded data, the 3D data decoding apparatus comprising:
an arithmetic decoding circuit configured to arithmetically decode a mesh displacement vector from the coded data; and
an atlas information decoding circuit configured to decode atlas information from the coded data, wherein:
the arithmetic decoding circuit decodes, from the coded data, a first flag indicating whether a coefficient of each component of the mesh displacement vector has an absolute value of greater than 0, a second flag indicating whether the coefficient has an absolute value of greater than 1, a third flag indicating whether the coefficient has an absolute value of greater than 2, and a fourth flag indicating whether the coefficient has an absolute value of greater than 3, and
the atlas information decoding circuit decodes, from the coded data, a fifth flag indicating whether the mesh displacement vector is one dimensional.