Number | Date | Country | Kind |
---|---|---|---|
2-035660 | Feb 1990 | JPX | |
2-037853 | Feb 1990 | JPX |
This application is a continuation of application Ser. No. 07/761,968, filed as PCT/JP91/00192 Feb. 16, 1991, now abandoned.
Number | Name | Date | Kind |
---|---|---|---|
4636586 | Schiff | Jan 1987 | |
4912758 | Arbel | Mar 1990 | |
4947425 | Grizmala et al. | Aug 1990 |
Number | Date | Country |
---|---|---|
0333581 | Sep 1989 | EPX |
0366584 | May 1990 | EPX |
56-01649 | Jan 1981 | JPX |
61-206354 | Feb 1987 | JPX |
1-24657 | Jan 1989 | JPX |
2220546 | Jan 1990 | GBX |
8802582 | Apr 1988 | WOX |
WO8905068 | Jun 1989 | WOX |
Entry |
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Hsu et al., "Acoustic Echo Cancellation for Loudspeaker Telephones", IEEE/IEICE-Global Telecommunications Conference, vol. 3/3, Nov. 1987, pp. 1955-1959, XP94127. |
Proceedings of Eusipco-88 Fourth European Signal Processing Conference, "High Quality Hands-Free Telephony Using Voice Switching Optimized with Echo Cancellation", pp. 495-498, Sep., vol. 11, 1988. |
Proceedings of Eusipco-88 Fourth European Signal Processing Conference, "Achieving the Control of the Acoustic Echo in Audio Terminals", pp. 491-494, Sep., vol. 11, 1988. |
Number | Date | Country | |
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Parent | 761968 | Oct 1991 |