High-level syntax for geometry-based point cloud compression

An apparatus configured to decode a point cloud, the apparatus comprising:

• a memory;
• and
• one or more processors implemented in circuitry and in communication with the memory, the one or more processors configured to:
• decode, from a bitstream, a first syntax element indicating a number of bits used to encode one or more second syntax elements, wherein the one or more second syntax elements indicate one or more of an offset of a bounding box, an origin point of the bounding box, a size of the bounding box, or a number of unique segments, and wherein the first syntax element is separate from the one or more second syntax elements;
• decode, from the bitstream, the one or more second syntax elements using a fixed length code based on the number of bits indicated by the first syntax element;
• and
• decode the point cloud based on values of the one or more second syntax elements.

An apparatus configured to encode a point cloud, the apparatus comprising:

• a memory;
• and
• one or more processors implemented in circuitry and in communication with the memory, the one or more processors configured to:
• encode a first syntax element indicating a number of bits used to encode one or more second syntax elements, wherein the one or more second syntax elements indicate one or more of an offset of a bounding box, an origin point of the bounding box, a size of the bounding box, or a number of unique segments, and wherein the first syntax element is separate from the one or more second syntax elements;
• and
• encode the one or more second syntax elements using a fixed length code using the number of bits.

An apparatus configured to decode point cloud data, the apparatus comprising:

• means for decoding, from a bitstream, a first syntax element indicating a number of bits used to encode one or more second syntax elements, wherein the one or more second syntax elements indicate one or more of an offset of a bounding box, an origin point of the bounding box, a size of the bounding box, or a number of unique segments, and wherein the first syntax element is separate from the one or more second syntax elements;
• means for decoding, from the bitstream, the one or more second syntax elements using a fixed length code based on the number of bits indicated by the first syntax element;
• and
• means for decoding the point cloud data based on values of the one or more second syntax elements.

A non-transitory computer-readable storage medium storing instructions that, when executed, cause one or more processors configured to decode point cloud data to:

• decode, from a bitstream, a first syntax element indicating a number of bits used to encode one or more second syntax elements, wherein the one or more second syntax elements indicate one or more of an offset of a bounding box, an origin point of the bounding box, a size of the bounding box, or a number of unique segments, and wherein the first syntax element is separate from the one or more second syntax elements;
• decode, from the bitstream, the one or more second syntax elements using a fixed length code based on the number of bits indicated by the first syntax element;
• and
• decode the point cloud data based on values of the one or more second syntax elements.