JPS55142405A - Recording and reproducing unit of pcm system - Google Patents
Recording and reproducing unit of pcm systemInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5038714B1 (en) * | 1971-04-07 | 1975-12-11 |
-
1979
- 1979-04-24 JP JP5098779A patent/JPS55142405A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5038714B1 (en) * | 1971-04-07 | 1975-12-11 |
Cited By (7)
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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