Invention Grant
- Patent Title: Tone detector judging a detection of a predetermined tone signal by comparing a characteristic quantity of the tone signal with characteristic quantities of other signals
- Patent Title (中): 音调检测器通过将音调信号的特征量与其他信号的特征量进行比较来判断预定音调信号的检测
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Application No.: US11201169Application Date: 2005-08-11
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Publication No.: US07804942B2Publication Date: 2010-09-28
- Inventor: Masanori Itoh
- Applicant: Masanori Itoh
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Dickstein Shapiro LLP
- Priority: JP2001-383298 20011217; JP2001-389891 20011221
- Main IPC: H04M11/00
- IPC: H04M11/00
Abstract:
A tone transmission part transmits a tone signal. A tone signal detection part detects data representing an echo signal of the tone signal transmitted by the tone transmission part, and detects data representing a predetermined tone signal targeted to be detected. The tone signal detection part also detects data representing tone signals of all of input signals. A tone judgment part excludes the data representing the echo signal from the data representing the tone signals of all of the input signals so as to judge a detection of the predetermined tone signal.
Public/Granted literature
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