Claims
- 1. A recording apparatus comprising:
- a bit extractor, said bit extractor extracting even-numbered bits from a series of m bits of an input data series and odd-numbered bits from a next series of m bits of the input data series, where m is an even number of 2 or larger, and combining the even-numbered bits extracted from said series of m bits of the input data series with the odd-numbered bits extracted from said next series of m bits of the input data to obtain a new series of m bits;
- a first pre-coder, said first pre-coder adding one "0" bit to said new series of m bits and modulating the added result by NRZI modulation to obtain a first series of m+1 bits;
- a second pre-coder, said pre-coder adding one "1" bit to said new series of m bits and modulating the added result by NRZI modulation to obtain a second series of m+1 bits;
- an output selector, said output selector comparing frequency characteristics of respective said first and second series of m+1 bits with a predetermined frequency characteristic and selecting from said first and second series of m+1 bits one whose frequency characteristic is closer to said predetermined frequency characteristic to obtain output bit series; and
- recording means for recording said output bit series on a recording medium.
- 2. A recording apparatus according to claim 1, wherein the input data series is a series of parallel m bits, and wherein said bit extractor comprises a delay for delaying odd-number bits of each parallel m bits of the input data series, and a combiner for combining output bits from the delay and even-numbered bits of next parallel m bits of the input data series.
Priority Claims (4)
Number |
Date |
Country |
Kind |
4-278954 |
Oct 1992 |
JPX |
|
4-321608 |
Dec 1992 |
JPX |
|
4-321610 |
Dec 1992 |
JPX |
|
4-321611 |
Dec 1992 |
JPX |
|
Parent Case Info
This application is a continuation of now abandoned application, Ser. No. 08/124,637, filed on Sep. 22, 1993.
US Referenced Citations (11)
Foreign Referenced Citations (10)
Number |
Date |
Country |
250049 |
Dec 1987 |
EPX |
339724 |
Nov 1989 |
EPX |
476767 |
Mar 1992 |
EPX |
476766 |
Mar 1992 |
EPX |
60-201728 |
Oct 1985 |
JPX |
61-084124 |
Apr 1986 |
JPX |
3109823 |
May 1991 |
JPX |
4134758 |
May 1992 |
JPX |
4268258 |
Sep 1992 |
JPX |
4-255969 |
Sep 1992 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
124637 |
Sep 1993 |
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