JPS54124605A - Pitch extraction unit - Google Patents
Pitch extraction unitInfo
- Publication number
- JPS54124605A JPS54124605A JP3268678A JP3268678A JPS54124605A JP S54124605 A JPS54124605 A JP S54124605A JP 3268678 A JP3268678 A JP 3268678A JP 3268678 A JP3268678 A JP 3268678A JP S54124605 A JPS54124605 A JP S54124605A
- Authority
- JP
- Japan
- Prior art keywords
- data
- circuit
- average amplitude
- retrieval
- width
- 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
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To reduce pitch detection errors by making the detection range of a pitch narrow in case of a large average amplitude width and making the detection range of the pitch period wide in case of a small average amplitude width.
CONSTITUTION: Sound waveform data is inputted to average amplitude width calculating circuit 203 and auto-correlation value calculating circuit 204 through input terminal 201. Maximum value detector circuit 206 detects the maximum value from circuit 204 according to data from retrieval range data generator circuit 205, and not only outputs data from output terminal 212 but also feeds back data to circuit 205. Circuit 205 leads out retrieval width data from retrieval range data table 207 according to average amplitude width data from circuit 203 and generates the value, which is obtained by adding the retrieval width data above to data fed back from circuit 206, as the upper limit value of the detection range in the next frame and outputs this value as control data of circuit 206. Pitch period data are outputted successively by repeating this operation.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3268678A JPS54124605A (en) | 1978-03-20 | 1978-03-20 | Pitch extraction unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3268678A JPS54124605A (en) | 1978-03-20 | 1978-03-20 | Pitch extraction unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54124605A true JPS54124605A (en) | 1979-09-27 |
Family
ID=12365746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3268678A Pending JPS54124605A (en) | 1978-03-20 | 1978-03-20 | Pitch extraction unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54124605A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6186800A (en) * | 1984-10-03 | 1986-05-02 | 三洋電機株式会社 | Real time voice analysis system |
-
1978
- 1978-03-20 JP JP3268678A patent/JPS54124605A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6186800A (en) * | 1984-10-03 | 1986-05-02 | 三洋電機株式会社 | Real time voice analysis system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54125585A (en) | Profiling control system | |
JPS54104230A (en) | Processing circuit for vertical synchronizing signal | |
JPS525581A (en) | Voltage detector circuit | |
JPS54124605A (en) | Pitch extraction unit | |
ES8402423A1 (en) | Methods of calibrating linearizing circuits. | |
JPS52147288A (en) | Misoperation prevention equipment | |
JPS55102034A (en) | Set unit for unit address | |
JPS5330313A (en) | Singing electronic system | |
JPS5374022A (en) | Sound volume envelop setting system in electronic musical instrument | |
JPS5377412A (en) | Noise eliminating circuit | |
JPS5267219A (en) | Pen touch type control circuit | |
JPS5239156A (en) | High voltage generating circuit | |
JPS5322465A (en) | Electronic watch with alarm | |
JPS53148916A (en) | Synchronous signal generator | |
JPS57130178A (en) | Signal processing device | |
JPS5392174A (en) | Digital frequency converter | |
JPS5318942A (en) | Frequency multiplication circuit | |
JPS547828A (en) | Balanced reception circuit | |
JPS51112255A (en) | Signal generator | |
JPS5455111A (en) | Digital agc system | |
JPS5248341A (en) | Detector | |
JPS5384668A (en) | Parallel-processing-type signal conversion circuit | |
JPS5252613A (en) | Sound signal regenerating device | |
JPS5595155A (en) | Operation check system for counter | |
JPS5665321A (en) | Processor for digital signal |