JPS5532224A - Pcm signal demodulator - Google Patents
Pcm signal demodulatorInfo
- Publication number
- JPS5532224A JPS5532224A JP10350378A JP10350378A JPS5532224A JP S5532224 A JPS5532224 A JP S5532224A JP 10350378 A JP10350378 A JP 10350378A JP 10350378 A JP10350378 A JP 10350378A JP S5532224 A JPS5532224 A JP S5532224A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- fixed length
- signal
- synchronizing signal
- counter
- 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.)
- Granted
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Rotational Drive Of Disk (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
PURPOSE: To prevent sampling of a synchronizing signal from being impossible by detecting the sampling of the synchronizing signal inserted, fixed length by fixed length, into PCM data in regeneration and then by widening the width of window pulses when in improper condition.
CONSTITUTION: Once equivalent horizontal synchronizing signal EHD formed by dividing regenerated clock pulses is supplied, period test circuit 44 generates window pulse Pt of fixed width via counter 43 corresponding to the detection of regenerated horizontal synchronizing signal PHD inserted, fixed length by fixed length, into PCM data so as to control the closing period of AND gate 46, thereby generating synchronizing pulses Pr synchronizing with signal PHD. Counter 43 is reset by this pulse Pr. If signal PHD is absent due to a dropout, etc., no pulse Pr is generated and counter 43 is not reset, so that circuit 44 will generate pulse Pt of longer pulse width on detecting it. Therefore, pulse Pr is generated as to signal PHD out of synchronism right after the absence, so that the following step out can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10350378A JPS5532224A (en) | 1978-08-25 | 1978-08-25 | Pcm signal demodulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10350378A JPS5532224A (en) | 1978-08-25 | 1978-08-25 | Pcm signal demodulator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5532224A true JPS5532224A (en) | 1980-03-06 |
JPS6123590B2 JPS6123590B2 (en) | 1986-06-06 |
Family
ID=14355774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10350378A Granted JPS5532224A (en) | 1978-08-25 | 1978-08-25 | Pcm signal demodulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5532224A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5760514A (en) * | 1980-09-26 | 1982-04-12 | Hitachi Ltd | Synchronizing signal protection circuit |
JPS59104731A (en) * | 1982-12-02 | 1984-06-16 | Sanyo Electric Co Ltd | Generating circuit of synchronizing circuit |
JPS60245334A (en) * | 1984-05-18 | 1985-12-05 | Matsushita Electric Ind Co Ltd | Digital signal regenerating device |
JPS6266469A (en) * | 1985-09-19 | 1987-03-25 | Nippon Gakki Seizo Kk | Synchronizing signal reproducing circuit |
JPS62114158A (en) * | 1985-11-14 | 1987-05-25 | Teac Co | Disc device |
WO1995012273A1 (en) * | 1993-10-26 | 1995-05-04 | Gennum Corporation | Self-adjusting window circuit with timing control |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0511432Y2 (en) * | 1987-06-17 | 1993-03-22 | ||
JPH02110790U (en) * | 1989-02-22 | 1990-09-05 |
-
1978
- 1978-08-25 JP JP10350378A patent/JPS5532224A/en active Granted
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5760514A (en) * | 1980-09-26 | 1982-04-12 | Hitachi Ltd | Synchronizing signal protection circuit |
JPH0470712B2 (en) * | 1980-09-26 | 1992-11-11 | Hitachi Ltd | |
JPS59104731A (en) * | 1982-12-02 | 1984-06-16 | Sanyo Electric Co Ltd | Generating circuit of synchronizing circuit |
JPS60245334A (en) * | 1984-05-18 | 1985-12-05 | Matsushita Electric Ind Co Ltd | Digital signal regenerating device |
JPH0431213B2 (en) * | 1984-05-18 | 1992-05-25 | ||
JPS6266469A (en) * | 1985-09-19 | 1987-03-25 | Nippon Gakki Seizo Kk | Synchronizing signal reproducing circuit |
JPS62114158A (en) * | 1985-11-14 | 1987-05-25 | Teac Co | Disc device |
JPH0352657B2 (en) * | 1985-11-14 | 1991-08-12 | Teac Corp | |
WO1995012273A1 (en) * | 1993-10-26 | 1995-05-04 | Gennum Corporation | Self-adjusting window circuit with timing control |
Also Published As
Publication number | Publication date |
---|---|
JPS6123590B2 (en) | 1986-06-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5532224A (en) | Pcm signal demodulator | |
JPS57113440A (en) | Playback program search controller of tape recorder | |
JPS5599522A (en) | Combustion controller | |
JPS5245835A (en) | Detection method of memory error occurrence address | |
JPS5444508A (en) | Pcm signal demodulator | |
JPS5545116A (en) | Signal position detector | |
JPS5513585A (en) | Frame synchronizing circuit | |
JPS51123118A (en) | Method of playback of field signal | |
JPS5517806A (en) | Output processing device of magnetic tape equipment | |
JPS5460814A (en) | Timing circuit of dipulse system | |
RU2107386C1 (en) | Pulse selector identifying pulses by their repetition period | |
JPS51123185A (en) | Parent-child clock | |
JPS5659304A (en) | Interface device for sequence control | |
JPS5595157A (en) | Supervisory unit for program getting out of control | |
JPS5452420A (en) | Discriminator for bar code | |
JPS5746365A (en) | Electronic editing system of digital recording | |
JPS5370415A (en) | Synchronizing circuit for magnetic memory | |
JPS57186859A (en) | Frame synchronizing circuit | |
JPS5443712A (en) | Pcm signal transmitter | |
JPS5573981A (en) | Memory control circuit | |
JPS5579583A (en) | Pulse signal sampling circuit | |
JPS55101867A (en) | Device for observing logic operation | |
JPS5545153A (en) | Synchronizing signal circuit | |
JPS5665318A (en) | Data pulse sampler | |
JPS5461426A (en) | Memory destruction preventing device for memory unit |