THREE-DIMENSIONAL DATA ENCODING METHOD, THREE-DIMENSIONAL DATA DECODING METHOD, THREE-DIMENSIONAL DATA ENCODING DEVICE, AND THREE-DIMENSIONAL DATA DECODING DEVICE

摘要

In this three-dimensional data encoding method, a predicted value is calculated on the basis of position information on one or more candidate points among a plurality of encoded three-dimensional points (S13631); a first residual, which is a difference between the predicted value and position information on one three-dimensional point to be encoded among a plurality of three-dimensional points (S13632); position information encoded data is generated by encoding the first residual (S13633); first identification information indicating whether the position information encoded data includes first position information encoded data calculated in a polar coordinate system is generated (S13634); attribute information on the one three-dimensional point to be encoded is encoded by using the position information on the one three-dimensional point to be encoded in a first coordinate system being a Cartesian coordinate system or the polar coordinate system and defining position information output in decoding, thereby generating attribute information encoded data (S13635); and a bit stream that includes the position information encoded data, the first identification data, and the attribute information encoded data is generated (S13636).