US4984099A
Expired / Lapsed
US
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Apparatus for decoding a transmitted signal
Assignee: Sony Corp
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Filing: 1989-05-19
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Granted: 1991-01-08
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Expires: 2009-05-19
Abstract
Abstract An apparatus for decoding a transmitted signal has a receiver for receiving the transmitted signal, a filter for limiting the frequency of the output of the receiver below a predetermined frequency, a generator for generating a clock signal having a frequency equal to a transmitting rate of the signal output from the receiver, a converter for sampling the output of the filter at a frequency defined by the clock signal and for converting the filter output into a binary signal, and a processor for decoding the binary signal according to a predetermined system.
Inventors
- 👤 Keiji Kanota
- 👤 Hajime Inoue
- 👤 Takahito Seki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:43
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; G11B20/10009; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/497
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
An apparatus for decoding a transmitted signal, which is precoded in a recording process in accordance with a class IV partial response method, comprising: receiver means including a magnetic head for receiving said transmitted signal through a magnetic recording medium; filter means including a low pass filter having a cut-off frequency defined by a Nyquist frequency of said transmitted signal for limiting the frequency of an output signal from said receiver means within a predetermined frequency range and to generate a filtered output signal; generator means for generating a clock signal with a frequency equal to a transmitting rate of said transmitted signal; converter means for sampling the filtered output signal at a frequency defined by said clock signal and for converting the filtered output signal into a binary signal; and process means including a transversal filter acting as an equalizer for decoding said binary signal according to said class IV partial response method.
Claim 2
Independent Claim
154 words
An apparatus for decoding a transmitted signal, which is precoded in a recording process in accordance with a class IV partial response method, comprising: receiver means including a magnetic head for receiving said transmitted signal through a magnetic recording medium; filter means including a low pass filter having a cut-off frequency defined by a Nyquist frequency of said transmitted signal for limiting the frequency of an output signal from said receiver means within a predetermined frequency range and to generate a filtered output signal; generator means for generating a clock signal with a frequency equal to a transmitting rate of said transmitted signal; converter means for sampling the filtered output signal at a frequency defined by said clock signal and for converting the filtered output signal into a binary signal; and process means including a transversal filter acting as an equalizer for decoding said binary signal according to said class IV partial response method.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |