JPS5548813A - Compressing and expanding unit for time axis of audio - Google Patents

Compressing and expanding unit for time axis of audio

Info

Publication number
JPS5548813A
JPS5548813A JP12130378A JP12130378A JPS5548813A JP S5548813 A JPS5548813 A JP S5548813A JP 12130378 A JP12130378 A JP 12130378A JP 12130378 A JP12130378 A JP 12130378A JP S5548813 A JPS5548813 A JP S5548813A
Authority
JP
Japan
Prior art keywords
write
signal
readout
pulse
time axis
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
JP12130378A
Other languages
Japanese (ja)
Inventor
Masayuki Nagata
Kazuji Meguro
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.)
KANBAYASHI SEISAKUSHO KK
Original Assignee
KANBAYASHI SEISAKUSHO KK
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 KANBAYASHI SEISAKUSHO KK filed Critical KANBAYASHI SEISAKUSHO KK
Priority to JP12130378A priority Critical patent/JPS5548813A/en
Priority to DE19792939962 priority patent/DE2939962A1/en
Publication of JPS5548813A publication Critical patent/JPS5548813A/en
Pending legal-status Critical Current

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 compression and expansion of time axis simply, by write- in and readout of audio signal digitized with the pulses different each other.
CONSTITUTION: The reproducing output changed in the tape speed is fed to the AD converter 4 and it is converted in the period of the pulse EPS of the pulse generator 13 of variable frequency, and it is alternately written in the RAM's 5 and 6. The read write signal RM and inversion RW from the control circuit 12 in the two RAM's repeate complementarily the write-in mode and readout mode, and the write-in and readout speed are controlled with the address pulses APSA and APSB from the circuit 12 at the same time. The data read out is alternately fed to the DA converter 8 via the gate 7, it is converted in the period of the decoded pulse DPS of the pulse generator 16 in a fixed frequency and analog signal is outputted. Thus, the companding signal having unchanged frequency as the original signal can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP12130378A 1978-10-02 1978-10-02 Compressing and expanding unit for time axis of audio Pending JPS5548813A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP12130378A JPS5548813A (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
JP12130378A JPS5548813A (en) 1978-10-02 1978-10-02 Compressing and expanding unit for time axis of audio

Publications (1)

Publication Number Publication Date
JPS5548813A true JPS5548813A (en) 1980-04-08

Family

ID=14807909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12130378A Pending JPS5548813A (en) 1978-10-02 1978-10-02 Compressing and expanding unit for time axis of audio

Country Status (1)

Country Link
JP (1) JPS5548813A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57105809A (en) * 1980-12-24 1982-07-01 Hitachi Ltd Recording and reproducing device
JPS57138699A (en) * 1981-02-20 1982-08-27 Sanyo Electric Co Voice synthesizer
JPS57211841A (en) * 1981-06-23 1982-12-25 Fujitsu Ltd Communication system for compression of voice information time
JPS61121539A (en) * 1984-11-16 1986-06-09 Nec Corp Sound signal reproducing circuit
JPS61125235A (en) * 1984-11-21 1986-06-12 Yaesu Musen Co Ltd Band compression system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57105809A (en) * 1980-12-24 1982-07-01 Hitachi Ltd Recording and reproducing device
JPH0223877B2 (en) * 1980-12-24 1990-05-25 Hitachi Ltd
JPS57138699A (en) * 1981-02-20 1982-08-27 Sanyo Electric Co Voice synthesizer
JPH035599B2 (en) * 1981-02-20 1991-01-25 Sanyo Electric Co
JPS57211841A (en) * 1981-06-23 1982-12-25 Fujitsu Ltd Communication system for compression of voice information time
JPH0324820B2 (en) * 1981-06-23 1991-04-04 Fujitsu Ltd
JPS61121539A (en) * 1984-11-16 1986-06-09 Nec Corp Sound signal reproducing circuit
JPS61125235A (en) * 1984-11-21 1986-06-12 Yaesu Musen Co Ltd Band compression system

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