Communication support system
US12112733B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2023 |
| Grant date | Oct 8, 2024 |
| Priority date | — |
| Expiry date | Jun 7, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/505
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A noise canceling adaptive filter outputs, from a front seat speaker, a noise canceling sound generated by applying a transfer function X(z) adapted by an adaptive operation using an output of a front seat microphone as an error to an output sound of a sound source apparatus. An output of the front seat microphone is added to an output of an audio feedback canceling filter by a second adder, added to an output sound of the sound source apparatus by a third adder, and output from a rear seat speaker. The audio feedback canceling filter applies a transfer function X′(z) and a transfer function C{circumflex over ( )}(z) on an output of the second adder and outputs a resultant. The transfer function C{circumflex over ( )}(z) corresponds to a transfer function C(z) from the front seat speaker to the front seat microphone. In synchronization control, the transfer function X(z) is set as the transfer function X′(z).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.