基本信息:
- 专利标题： FRONTEND CAPTURE
- 申请号：PCT/US2022/039205 申请日：2022-08-02
- 公开(公告)号：WO2023014738A1 公开(公告)日：2023-02-09
- 发明人： RAO, Yu
- 申请人： ZOOM VIDEO COMMUNICATIONS, INC.
- 申请人地址： 55 Almaden Boulevard, Suite 600
- 专利权人： ZOOM VIDEO COMMUNICATIONS, INC.
- 当前专利权人： ZOOM VIDEO COMMUNICATIONS, INC.
- 当前专利权人地址： 55 Almaden Boulevard, Suite 600
- 代理机构： STEAKLEY, Edward
- 优先权： US17/503,263 2021-10-15
- 主分类号： G10L21/0316
- IPC分类号： G10L21/0316 ; H03G9/00 ; H04M3/56 ; H04R27/00 ; G10L21/0216 ; H03G7/002 ; H03G7/007 ; H03G9/005 ; H04M3/18 ; H04M3/568
摘要：
Disclosed are systems and methods for a frontend capture module of a video conferencing application, which can modify an input signal, received from a microphone device to match predetermined signal characteristics, such as voice signal level and expected noise floor. An Input stage, a suppression module and an output stage amplify the voice signal portion of the input signal and suppress the noise signal of input signal to predetermined ranges. The input stage selectively applies gains defined by a gain table, based on signal level of the input signal. The suppression module selectively applies a suppression gain to the input signal based on presence or absence of voice signal in the input signal. The output stage further amplifies the input signal in portions having a voice signal and applies a gain table to maintain a consistent noise floor.
IPC结构图谱:
| G | 物理 |
| --G10 | 乐器；声学 |
| ----G10L | 语言分析或合成；语言识别 |
| ------G10L21/00 | 为了改变语音信号的品质或其可理解性而处理语音信号以产生另一种可听的或非可听的信号，例如视觉信号、触觉信号 |
| --------G10L21/003 | .改变声音质量，例如音调或共振峰 |
| ----------G10L21/0316 | ..通过改变振幅 |