JPS548910A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Echo erasing unit
Assignee: NEC Corp
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Filing: 1977-06-22
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Granted: —
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Expires: 1997-06-22
Abstract
Abstract PURPOSE:To improve the S/N for a remote caller and to increase the quality of communication, by rejecting the noise from artifical echo line when the reception signal is absent, through the provision of a variable in the correction loop.
Inventors
- 👤 Mutsuya Tajima
- 👤 Takashi Ogiwara
- 👤 Shunji Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-10-31 23:35
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/20; H04B3/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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