JPS6424659A - Voice conference equipment - Google Patents
Voice conference equipmentInfo
- Publication number
- JPS6424659A JPS6424659A JP18144487A JP18144487A JPS6424659A JP S6424659 A JPS6424659 A JP S6424659A JP 18144487 A JP18144487 A JP 18144487A JP 18144487 A JP18144487 A JP 18144487A JP S6424659 A JPS6424659 A JP S6424659A
- Authority
- JP
- Japan
- Prior art keywords
- gain
- circuit
- microphone
- variable
- speaker
- 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
Abstract
PURPOSE:To use the titled equipment without losing the performance of an echo cancelling circuit even when a speaker and a microphone are approached by approaching a bypass quantity by acoustic coupling to an always constant level not giving hindrance for the convergence of an echo canceller circuit. CONSTITUTION:A prescribed test signal is generated at the initial state and given to a reception line. A gain control circuit 17 compares an output from an amplifier circuit 14 for microphone with a preset reference value to calculate a gain variable setting signal thereby decreasing the gain of the variable gain circuit 16 when the output is larger than the reference value. Then the output of the gain control circuit 17 is latched while being switched to the value calculated at the leading of the control signal input and the gain of the gain variable circuit 16 is kept to a value subject to variable control. Thus, even when the speaker and microphone are approached, the convergence of the echo cancelling circuit is applied normally, then the bypassed voice due to the acoustic coupling between the speaker and the microphone is lost and the equipment hardly depending on the conditions in a conference room is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18144487A JPS6424659A (en) | 1987-07-21 | 1987-07-21 | Voice conference equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18144487A JPS6424659A (en) | 1987-07-21 | 1987-07-21 | Voice conference equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6424659A true JPS6424659A (en) | 1989-01-26 |
Family
ID=16100876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18144487A Pending JPS6424659A (en) | 1987-07-21 | 1987-07-21 | Voice conference equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6424659A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131435A (en) * | 1990-04-19 | 1992-07-21 | Tsudakoma Corporation | On loom warp mending operation |
US7839389B2 (en) | 2005-09-29 | 2010-11-23 | Kabushiki Kaisha Toshiba | Information processing equipment and method for determining the priority of input keys thereof |
US7909698B2 (en) | 2003-09-12 | 2011-03-22 | Namco Bandai Games, Inc. | Input device, input determination method, game system, game system control method, program, and information storage medium |
-
1987
- 1987-07-21 JP JP18144487A patent/JPS6424659A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131435A (en) * | 1990-04-19 | 1992-07-21 | Tsudakoma Corporation | On loom warp mending operation |
US7909698B2 (en) | 2003-09-12 | 2011-03-22 | Namco Bandai Games, Inc. | Input device, input determination method, game system, game system control method, program, and information storage medium |
US7839389B2 (en) | 2005-09-29 | 2010-11-23 | Kabushiki Kaisha Toshiba | Information processing equipment and method for determining the priority of input keys thereof |
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