JPS612959B2 - - Google Patents
Info
- Publication number
- JPS612959B2 JPS612959B2 JP53070741A JP7074178A JPS612959B2 JP S612959 B2 JPS612959 B2 JP S612959B2 JP 53070741 A JP53070741 A JP 53070741A JP 7074178 A JP7074178 A JP 7074178A JP S612959 B2 JPS612959 B2 JP S612959B2
- Authority
- JP
- Japan
- Prior art keywords
- outputted
- reset signal
- output
- pitch frequency
- signals
- 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.)
- Expired
Links
Abstract
PURPOSE:To make it possible to extract a pitch frequency stably in a high speed in a comparatively simple unit by utilizing the output of a band pass filter group. CONSTITUTION:After input sound signals have the high band emphasized by pre-emphasis circuit 3 after amplification, they are applied to BPF group 5 which divides the frequency range of 200Hz to 6KHz into 16 to 30 channels. Signals of each divided channel are outputted to terminal 9 as the feature quantity of the sound wave as they are, and channel outputs of frequencies higher than the pitch frequency are outputted to terminal 10. Though these output signals are supplied to peak value detection holding part 12 through adder 11, a short pulse train is outputted after a prescribed time because a reset signal is supplied previously. This output is applied to reset signal control part 13, and it is possible to extract the pitch frequency stably by mutual operations of peak value holding part 12 and reset signal control part 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7074178A JPS54162405A (en) | 1978-06-14 | 1978-06-14 | Pitch frequency extracting unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7074178A JPS54162405A (en) | 1978-06-14 | 1978-06-14 | Pitch frequency extracting unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54162405A JPS54162405A (en) | 1979-12-24 |
| JPS612959B2 true JPS612959B2 (en) | 1986-01-29 |
Family
ID=13440231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7074178A Granted JPS54162405A (en) | 1978-06-14 | 1978-06-14 | Pitch frequency extracting unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54162405A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62128863U (en) * | 1986-02-07 | 1987-08-14 | ||
| JPS6440678U (en) * | 1987-09-03 | 1989-03-10 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845149B (en) * | 2016-03-18 | 2019-07-09 | 云知声（上海）智能科技有限公司 | The high acquisition methods of keynote and system in voice signal |
-
1978
- 1978-06-14 JP JP7074178A patent/JPS54162405A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62128863U (en) * | 1986-02-07 | 1987-08-14 | ||
| JPS6440678U (en) * | 1987-09-03 | 1989-03-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54162405A (en) | 1979-12-24 |
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