JPS5548812A - Compressing and expanding unit for time axis of audio - Google Patents

Compressing and expanding unit for time axis of audio

Info

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
Application number
JP12130278A
Other languages
Japanese (ja)
Inventor
Yorimoto Tanno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP12130278A priority Critical patent/JPS5548812A/en
Priority to DE19792939962 priority patent/DE2939962A1/en
Publication of JPS5548812A publication Critical patent/JPS5548812A/en
Pending legal-status Critical Current

Links

Landscapes

  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (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
JP12130278A 1978-10-02 1978-10-02 Compressing and expanding unit for time axis of audio Pending JPS5548812A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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