JPS5548812A - Compressing and expanding unit for time axis of audio - Google Patents
Compressing and expanding unit for time axis of audioInfo
- Publication number
- JPS5548812A JPS5548812A JP12130278A JP12130278A JPS5548812A JP S5548812 A JPS5548812 A JP S5548812A JP 12130278 A JP12130278 A JP 12130278A JP 12130278 A JP12130278 A JP 12130278A JP S5548812 A JPS5548812 A JP S5548812A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- write
- signal
- readout
- period
- 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
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
PURPOSE: To enable the compressing and expanding of time axis simply, by write- in and readout of audio signal digitized with the pulse having different period.
CONSTITUTION: The reproducing output changed in the tape speed with the companding selection circuit 17 is fed to the AD converter 4, converted in the period of the coded pulse EPS of the pulse generatot 13 and it is written in the RAM's 5 and 6 alternately. In the two RAM's, the read write signal RM and inversion RW from the control circuit 12 repeate the write-in mode and readout mode complementarily and the write-in and readout speed are controllel with the address pulses APSA(H) and APSB (I) from the sircuit 12. The data read out is fed to the DA converter via the gate 7 alternately, converted in the period of the decoded pulse DPS of the pulse generator 16, and analog signal is outputted. Thus, the companding signal having unchanged frequency as the original signal can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12130278A JPS5548812A (en) | 1978-10-02 | 1978-10-02 | Compressing and expanding unit for time axis of audio |
DE19792939962 DE2939962A1 (en) | 1978-10-02 | 1979-10-02 | Time compression expansion of tape recorded speech - using variable ratios selected by operator and avoiding speech distortion by accurate matching |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12130278A JPS5548812A (en) | 1978-10-02 | 1978-10-02 | Compressing and expanding unit for time axis of audio |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5548812A true JPS5548812A (en) | 1980-04-08 |
Family
ID=14807884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12130278A Pending JPS5548812A (en) | 1978-10-02 | 1978-10-02 | Compressing and expanding unit for time axis of audio |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5548812A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59501240A (en) * | 1982-07-06 | 1984-07-12 | テレフオンアクチ−ボラゲツト エル エム エリクソン | Device for radiotelephone transmission |
JPS59131999A (en) * | 1983-01-19 | 1984-07-28 | 松下電器産業株式会社 | Voice recognition equipment |
-
1978
- 1978-10-02 JP JP12130278A patent/JPS5548812A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59501240A (en) * | 1982-07-06 | 1984-07-12 | テレフオンアクチ−ボラゲツト エル エム エリクソン | Device for radiotelephone transmission |
JPS59131999A (en) * | 1983-01-19 | 1984-07-28 | 松下電器産業株式会社 | Voice recognition equipment |
JPH0345839B2 (en) * | 1983-01-19 | 1991-07-12 | Matsushita Electric Ind Co Ltd |
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