Invention Grant
- Patent Title: Tone detection
- Patent Title (中): 音调检测
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Application No.: US09841938Application Date: 2001-04-25
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Publication No.: US06914979B2Publication Date: 2005-07-05
- Inventor: Scott David Kurtz , Brian Michael McCarthy, Sr.
- Applicant: Scott David Kurtz , Brian Michael McCarthy, Sr.
- Applicant Address: US PA Conshoken
- Assignee: Adaptive Digital Technologies, Inc.
- Current Assignee: Adaptive Digital Technologies, Inc.
- Current Assignee Address: US PA Conshoken
- Agent Howard R. Popper
- Main IPC: H04M3/00
- IPC: H04M3/00 ; H04M1/00
Abstract:
A DFT is used to compute the magnitude and phase of the frequencies desired to be detected in a frame of sampled data by performing 2 dot products for each such frequency. The two dot products are calculated using the samples in the frame and an equal number of equally spaced cosine and sine coefficients for each frequency to be detected.
Public/Granted literature
- US20030012358A1 Tone detection Public/Granted day:2003-01-16
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