JPS6412648A - Echo canceller - Google Patents
Echo cancellerInfo
- Publication number
- JPS6412648A JPS6412648A JP16694687A JP16694687A JPS6412648A JP S6412648 A JPS6412648 A JP S6412648A JP 16694687 A JP16694687 A JP 16694687A JP 16694687 A JP16694687 A JP 16694687A JP S6412648 A JPS6412648 A JP S6412648A
- Authority
- JP
- Japan
- Prior art keywords
- circuits
- circuit
- converter
- tap
- echo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To maintain a large echo cancellation quantity with a small scale of hardware by storing only fewer tap only among tap numbers of a transmission characteristic of a circuit deducting a storage circuit. CONSTITUTION:The titled canceller consists of a reception input terminal 1, a speaker 2, n-set of microphones 301-30n, a transmission output terminal 4, a training signal source 5, an A/D converter 6, a deduction circuit (N-tap) 7, a pseudo echo path (FIR filter) 8, an A/D converter 9, a subtractor 10, a D/A converter 11, n-set of gain adjusting circuits 121-12n, adders 13, 16 and n-set of gain adjusting circuits 181-18n. Then storage circuits 191-19n are circuits storing the m-set of taps (m<N) from the beginning among transmission characteristics (impulse response) of the deduction circuit 7. Thus, the echo is cancelled without decreasing the conventional quantity of echo cancellation by using storage circuits with less hardware scale.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16694687A JPS6412648A (en) | 1987-07-06 | 1987-07-06 | Echo canceller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16694687A JPS6412648A (en) | 1987-07-06 | 1987-07-06 | Echo canceller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6412648A true JPS6412648A (en) | 1989-01-17 |
Family
ID=15840562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16694687A Pending JPS6412648A (en) | 1987-07-06 | 1987-07-06 | Echo canceller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6412648A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5027393A (en) * | 1988-06-20 | 1991-06-25 | Nec Corporation | Voice conference system using echo cancellers |
FR2785482A1 (en) * | 1998-10-28 | 2000-05-05 | France Telecom | Echo sound reduction hands free/distant sound signal process having microphones spaced apart and phase/amplitude detector with separator unit loudspeakers passing reduced echo signal. |
WO2018230062A1 (en) * | 2017-06-12 | 2018-12-20 | 株式会社オーディオテクニカ | Voice signal processing device, voice signal processing method and voice signal processing program |
-
1987
- 1987-07-06 JP JP16694687A patent/JPS6412648A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5027393A (en) * | 1988-06-20 | 1991-06-25 | Nec Corporation | Voice conference system using echo cancellers |
FR2785482A1 (en) * | 1998-10-28 | 2000-05-05 | France Telecom | Echo sound reduction hands free/distant sound signal process having microphones spaced apart and phase/amplitude detector with separator unit loudspeakers passing reduced echo signal. |
EP1014669A1 (en) * | 1998-10-28 | 2000-06-28 | France Telecom | Acoustic system for echo cancellation |
US6724899B1 (en) * | 1998-10-28 | 2004-04-20 | France Telecom S.A. | Sound pick-up and reproduction system for reducing an echo resulting from acoustic coupling between a sound pick-up and a sound reproduction device |
WO2018230062A1 (en) * | 2017-06-12 | 2018-12-20 | 株式会社オーディオテクニカ | Voice signal processing device, voice signal processing method and voice signal processing program |
CN110741563A (en) * | 2017-06-12 | 2020-01-31 | 铁三角有限公司 | Speech signal processing device, speech signal processing method, and speech signal processing program |
JPWO2018230062A1 (en) * | 2017-06-12 | 2020-05-21 | 株式会社オーディオテクニカ | Audio signal processing device, audio signal processing method, and audio signal processing program |
CN110741563B (en) * | 2017-06-12 | 2021-11-23 | 铁三角有限公司 | Speech signal processing apparatus, method and storage medium thereof |
US11227618B2 (en) | 2017-06-12 | 2022-01-18 | Audio-Technica Corporation | Sound signal processing device, sound signal processing method and sound signal processing program |
JP2022125069A (en) * | 2017-06-12 | 2022-08-26 | 株式会社オーディオテクニカ | Voice signal processing device and voice signal processing method |
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