JP2009087411A5 - - Google Patents

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JP2009087411A5
JP2009087411A5 JP2007252935A JP2007252935A JP2009087411A5 JP 2009087411 A5 JP2009087411 A5 JP 2009087411A5 JP 2007252935 A JP2007252935 A JP 2007252935A JP 2007252935 A JP2007252935 A JP 2007252935A JP 2009087411 A5 JP2009087411 A5 JP 2009087411A5
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continuous
amplitude
reproduction signal
section
recording information
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JP2007252935A
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JP2009087411A (en
JP4776604B2 (en
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Claims (8)

記録媒体に記録された情報を再生する信号処理装置であって、
前記記録媒体から再生した再生信号から最短記録情報が連続した区間を検出する連続最短記録情報検出手段と、
前記最短記録情報が連続していると検出した区間の再生信号の振幅を調整する振幅調整手段と、
前記振幅調整手段から出力された再生信号に対してパーシャルレスポンス等化を行う波形等化手段と、
前記波形等化手段から出力された等化信号に対してビタビ復号処理を行う復号手段と、を備える信号処理装置。 A signal processing device for reproducing information recorded on a recording medium,
Continuous shortest recording information detecting means for detecting a section in which the shortest recording information is continuous from a reproduction signal reproduced from the recording medium;
Amplitude adjusting means for adjusting the amplitude of the reproduction signal in the section detected as the shortest recording information is continuous;
Waveform equalizing means for performing partial response equalization on the reproduction signal output from the amplitude adjusting means;
And a decoding unit configured to perform a Viterbi decoding process on the equalized signal output from the waveform equalizing unit. 前記振幅調整手段は、前記検出した最短記録情報が連続した区間の再生信号の振幅をゼロレベルに調整する請求項１に記載の信号処理装置。   The signal processing apparatus according to claim 1, wherein the amplitude adjusting unit adjusts the amplitude of a reproduction signal in a section in which the detected shortest recording information is continuous to a zero level. 前記連続最短記録情報検出手段は、前記再生信号が所定のスレッショルドの範囲内に所定の期間以上収まった場合、前記スレッショルドの範囲内に収まった区間を最短記録情報が連続した区間であると検出する請求項１または２に記載の信号処理装置。   The continuous shortest recording information detection means detects that the shortest recording information is a continuous section when the reproduction signal is within a predetermined threshold range for a predetermined period or longer. The signal processing apparatus according to claim 1 or 2. 前記スレッショルドは、前記再生信号の振幅の大きさによってスレッショルドレベルが可変であることを特徴とする請求項３に記載の信号処理装置。The signal processing apparatus according to claim 3, wherein the threshold level is variable depending on the amplitude of the reproduction signal. 記録媒体に記録された情報を再生する信号処理方法であって、A signal processing method for reproducing information recorded on a recording medium,
前記記録媒体から再生した再生信号から最短記録情報が連続した区間を検出する連続最短記録情報検出工程と、A continuous shortest recording information detection step for detecting a section in which the shortest recording information is continuous from a reproduction signal reproduced from the recording medium;
前記最短記録情報が連続していると検出した区間の再生信号の振幅を調整する振幅調整工程と、An amplitude adjustment step of adjusting the amplitude of the reproduction signal of the section detected as the shortest recording information is continuous;
前記振幅調整された再生信号に対してパーシャルレスポンス等化を行う波形等化工程と、A waveform equalization step for performing partial response equalization on the amplitude-adjusted reproduction signal;
前記等化された等化信号に対してビタビ復号処理を行う復号工程と、を備える信号処理方法。And a decoding step of performing Viterbi decoding processing on the equalized equalized signal. 前記振幅調整工程は、前記検出した最短記録情報が連続した区間の再生信号の振幅をゼロレベルに調整する請求項５に記載の信号処理方法。The signal processing method according to claim 5, wherein the amplitude adjustment step adjusts the amplitude of a reproduction signal in a section in which the detected shortest recording information is continuous to a zero level. 前記連続最短記録情報検出工程は、再生信号が所定のスレッショルドの範囲内に所定の期間以上収まった場合、前記スレッショルドの範囲内に収まった区間を最短記録情報が連続した区間であると検出する請求項５または６に記載の信号処理方法。The continuous shortest record information detecting step detects a section within the threshold range as a section in which the shortest record information is continuous when the reproduction signal is within a predetermined threshold range for a predetermined period or longer. Item 7. The signal processing method according to Item 5 or 6. 前記スレッショルドは、前記再生信号の振幅の大きさによってスレッショルドレベルが可変であることを特徴とする請求項７に記載の信号処理方法。The signal processing method according to claim 7, wherein a threshold level of the threshold is variable depending on an amplitude of the reproduction signal.
JP2007252935A 2007-09-28 2007-09-28 Signal processing apparatus and signal processing method Expired - Fee Related JP4776604B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007252935A JP4776604B2 (en) 2007-09-28 2007-09-28 Signal processing apparatus and signal processing method

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JP2007252935A JP4776604B2 (en) 2007-09-28 2007-09-28 Signal processing apparatus and signal processing method

Related Child Applications (1)

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JP2011138316A Division JP5138794B2 (en) 2011-06-22 2011-06-22 Signal processing apparatus and signal processing method

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JP2009087411A JP2009087411A (en) 2009-04-23
JP2009087411A5 true JP2009087411A5 (en) 2009-12-03
JP4776604B2 JP4776604B2 (en) 2011-09-21

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Publication number Priority date Publication date Assignee Title
JP5138794B2 (en) * 2011-06-22 2013-02-06 三菱電機株式会社 Signal processing apparatus and signal processing method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3776530B2 (en) * 1996-09-30 2006-05-17 株式会社東芝 Optical information reproducing device
KR100911142B1 (en) * 2002-12-02 2009-08-06 삼성전자주식회사 Equalizer for high density optical disc reproducing apparatus and equalizing method therefor
JP2006344294A (en) * 2005-06-09 2006-12-21 Hitachi Ltd Information reproducing device and reproducing signal processing circuit
JP2006351106A (en) * 2005-06-16 2006-12-28 Hitachi Ltd Optical disk system

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