JPS6490637A - Digital signal demodulating method - Google Patents
Digital signal demodulating methodInfo
- Publication number
- JPS6490637A JPS6490637A JP62245877A JP24587787A JPS6490637A JP S6490637 A JPS6490637 A JP S6490637A JP 62245877 A JP62245877 A JP 62245877A JP 24587787 A JP24587787 A JP 24587787A JP S6490637 A JPS6490637 A JP S6490637A
- Authority
- JP
- Japan
- Prior art keywords
- data
- signal
- shift
- discrimination
- error
- 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
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
PURPOSE:To attain sure demodulation even when deviation takes place in burst error by using shift information obtained through data conversion so as to discriminate the shift and synchronizing with the data and the timing pulse. CONSTITUTION:When a burst error takes place in a data SD, a burst error discrimination circuit 12 discriminates it. In this discrimination, the returning point of time of an error is discriminated to obtain a discrimination signal S'' because the reproduction level from a recording medium 1 is lowered at the occurrence of error and increased after the restoration. The signal S'' is fed to a data shift discrimination circuit 13 to count the 3-bit shift information data SI at every N bits from the production of the signal S''. Then the counted data are obtained by using data SI2, SI1, SIphi to compare the quantity of counted values C, R, L and the one bit shift to right/left are decided from the result. A synchronizing control circuit 14 loads the value in matching with the bit shift in the 1/14 counter 5 by using the deciding signal. Thus, the timing pulse from the decoder 6 is synchronized with the data SD.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62245877A JPS6490637A (en) | 1987-10-01 | 1987-10-01 | Digital signal demodulating method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62245877A JPS6490637A (en) | 1987-10-01 | 1987-10-01 | Digital signal demodulating method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6490637A true JPS6490637A (en) | 1989-04-07 |
Family
ID=17140134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62245877A Pending JPS6490637A (en) | 1987-10-01 | 1987-10-01 | Digital signal demodulating method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6490637A (en) |
-
1987
- 1987-10-01 JP JP62245877A patent/JPS6490637A/en active Pending
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