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

To improve coding efficiency.SOLUTION: A three-dimensional data encoding method includes: calculating multiple difference values each of which is a difference between (1) a value of attribute information of three-dimensional points and (2) a predicted value corresponding to the attribute information of the three-dimensional points (S6591); generating first information indicating the number of zero difference values consecutive in a code sequence comprising the difference values (S6592); and generating a bitstream including the first information (S6593). The predicted value is calculated based on weighted average values of attribute information of encoded N three-dimensional points neighboring a three-dimensional point.SELECTED DRAWING: Figure 112 【課題】符号化効率を向上する。【解決手段】三次元データ符号化方法は、各々が、（１）三次元点の属性情報の値と、（２）三次元点の属性情報に対応する予測値と、の差分である複数の差分値を算出し（Ｓ６５９１）、複数の差分値で構成された符号列において値がゼロである複数のゼロ値が連続する数を示す第１情報を生成し（Ｓ６５９２）、第１情報を含むビットストリームを生成し（Ｓ６５９３）し、予測値は、三次元点の周囲の符号化済みのＮ個の三次元点の属性情報の重みづけ平均値に基づいて算出される。【選択図】図１１２