Patent ID: 11886996
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The training data augmentation device according to claim 2, wherein:
the first Cartesian coordinate system is defined by an X-axis, a Y-axis and a Z-axis that are orthogonal to one another in three-dimensional space;
the first observation signal includes an X component D(X) based on a signal observed by a sensor having directivity in a direction of the X-axis, a Y component D(Y) based on a signal observed by a sensor having directivity in a direction of the Y-axis and a Z component D(Z) based on a signal observed by a sensor having directivity in a direction of the Z-axis, as elements; and
the operation of performing an operation of rotation in the elevation angle direction on the second Cartesian coordinate system is performed in such a manner that an elevation angle of the second observation signal becomes no less than −π/2 and no more than π/2.