JPS55142405A - Recording and reproducing unit of pcm system - Google Patents

Recording and reproducing unit of pcm system

Info

Publication number
JPS55142405A
JPS55142405A JP5098779A JP5098779A JPS55142405A JP S55142405 A JPS55142405 A JP S55142405A JP 5098779 A JP5098779 A JP 5098779A JP 5098779 A JP5098779 A JP 5098779A JP S55142405 A JPS55142405 A JP S55142405A
Authority
JP
Japan
Prior art keywords
recording
circuit
clock
master clock
frequency
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
JP5098779A
Other languages
Japanese (ja)
Inventor
Tetsuo Shimizu
Masaru Nishimura
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP5098779A priority Critical patent/JPS55142405A/en
Publication of JPS55142405A publication Critical patent/JPS55142405A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable to select the recording time and audio quality freely, by changing the sampling frequency according to the amount of information recordable at the change-over of tape speed.
CONSTITUTION: The tape running speed variable circuit is constituted with the master clock generating circuit 31, frequency dividing circuit 30, servo circuit 29, and capstan motor 28. The master clock suitably frequency-divided at the circuit 30 is fed to the sample hold circuits 5, 6 and time axis conversion circuit 11. When the bit rate of recording signal is kept as it is and the running speed is made slow, the recording wave length λ is smaller. Then, the bit rate is lowered to obtain excellent output. Accordingly, when the tape speed is halved, the clock is halved at the clock recording. When the master clock is selected with the switch SW1, the interlocked SW2 is also operated and the cut-off frequency of LPF is switched. Thus, since the tape speed, sampling frequency, and recording clock can be changed by only changing the master clock, the recording time and sound quality can be selected.
COPYRIGHT: (C)1980,JPO&Japio
JP5098779A 1979-04-24 1979-04-24 Recording and reproducing unit of pcm system Pending JPS55142405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5098779A JPS55142405A (en) 1979-04-24 1979-04-24 Recording and reproducing unit of pcm system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5098779A JPS55142405A (en) 1979-04-24 1979-04-24 Recording and reproducing unit of pcm system

Publications (1)

Publication Number Publication Date
JPS55142405A true JPS55142405A (en) 1980-11-07

Family

ID=12874138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5098779A Pending JPS55142405A (en) 1979-04-24 1979-04-24 Recording and reproducing unit of pcm system

Country Status (1)

Country Link
JP (1) JPS55142405A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58161117A (en) * 1982-03-19 1983-09-24 Matsushita Electric Ind Co Ltd Pulse code modulation recording and reproducing device
JPS58186290A (en) * 1982-04-24 1983-10-31 Sony Corp Digital matrix circuit
JPS59178607A (en) * 1983-03-30 1984-10-09 Sony Corp Reproducing device of digital disc
JPS6061954A (en) * 1983-09-14 1985-04-09 Hitachi Ltd Fixed head type digital signal recording and reproducing device
JPH05151710A (en) * 1982-01-25 1993-06-18 Discovision Assoc Optical disk and regenerating device thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5038714B1 (en) * 1971-04-07 1975-12-11

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5038714B1 (en) * 1971-04-07 1975-12-11

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05151710A (en) * 1982-01-25 1993-06-18 Discovision Assoc Optical disk and regenerating device thereof
JPS58161117A (en) * 1982-03-19 1983-09-24 Matsushita Electric Ind Co Ltd Pulse code modulation recording and reproducing device
JPS58186290A (en) * 1982-04-24 1983-10-31 Sony Corp Digital matrix circuit
JPH0379915B2 (en) * 1982-04-24 1991-12-20 Sony Corp
JPS59178607A (en) * 1983-03-30 1984-10-09 Sony Corp Reproducing device of digital disc
JPS6061954A (en) * 1983-09-14 1985-04-09 Hitachi Ltd Fixed head type digital signal recording and reproducing device
JPH0546033B2 (en) * 1983-09-14 1993-07-12 Hitachi Ltd

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