Patent ID: 11922964
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 4:
5. The PSD optimization device according to claim 1,
wherein, with u=[uST, uINT, uBNT]T, and v as an auxiliary variable of variable u,
the optimization problem for the cost function is defined as a problem in which infu,v F1(u)+F2(v) (where F1 and F2 are convex functions) is solved under linear constraints relating to the variables u and v,
and where the linear constraints relating to the variables u and v include at least one of a constraint relating to the frequency structure of the sound source, a constraint relating to the temporal structure of the sound source, and a constraint relating to the spatial structure of the sound source, or F1(u)+F2(v) includes at least one of a convex cost term relating to the frequency structure of the sound source, a convex cost term relating to the temporal structure of the sound source, and a convex cost term relating to the spatial structure of the sound source.