JP4327087B2 - ステレオ信号処理装置 - Google Patents
ステレオ信号処理装置 Download PDFInfo
- Publication number
- JP4327087B2 JP4327087B2 JP2004520999A JP2004520999A JP4327087B2 JP 4327087 B2 JP4327087 B2 JP 4327087B2 JP 2004520999 A JP2004520999 A JP 2004520999A JP 2004520999 A JP2004520999 A JP 2004520999A JP 4327087 B2 JP4327087 B2 JP 4327087B2
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- JP
- Japan
- Prior art keywords
- phase error
- error correction
- phase
- signal processing
- dbx
- 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.)
- Expired - Fee Related
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-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
- H04S1/007—Two-channel systems in which the audio signals are in digital form
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereo-Broadcasting Methods (AREA)
Description
本発明の目的は、上述の従来技術の欠点を回避し、低い周波数だけでなく高い周波数に対してもチャネルセパレーションが良好になるように改良された構成を有するステレオ信号処理装置を提供することにある。
本発明のさらなる有利な実施の態様は従属請求項に規定されている。
Claims (8)
- 特にデジタルBTSCテレビジョンデコーダのためのステレオ信号処理装置であって、
入力サブチャンネル信号を入力する入力と、DBX拡張手段と、出力サブチャンネル信号を出力する出力とを備えるサブチャンネル信号処理部を備え、
前記サブチャンネル信号処理部は、前記サブチャンネル信号処理部の前記出力において出力サブチャンネル信号の位相が所定の周波数範囲に渡って本質的に一定またはゼロになるように、前記DBX拡張手段のフェーズエラーを修正するフェーズエラー補正手段をさらに備え、
前記フェーズエラー補正手段は、前記サブチャンネル信号の振幅に従って制御される線形レベル依存フェーズエラー修正手段を備え、
前記DBX拡張手段から出力された制御信号が前記線形レベル依存フェーズエラー修正手段に入力され、前記線形レベル依存フェーズエラー修正手段は、前記制御信号に基づいて、前記入力サブチャンネル信号の位相を修正して、前記DBX拡張手段に出力する、
ことを特徴とする、ステレオ信号処理装置。 - 前記フェーズエラー補正手段は、前記サブチャンネル信号処理部の前記入力と前記DBX拡張手段との間に結合されることを特徴とする、請求項1に記載の装置。
- 前記DBX拡張手段は、
前記フェーズエラー補正手段から出力された信号をフィルタリングする帯域通過フィルタと、
前記帯域通過フィルタから出力された信号の2乗平均平方根をとって、前記制御信号を前記線形レベル依存フェーズエラー修正手段に出力するRMS検出器と、
を備えることを特徴とする、請求項1に記載の装置。 - 前記線形レベル依存フェーズエラー修正手段は、可変位相遅れフィルタにより構成されることを特徴とする、請求項1又は請求項3に記載の装置。
- 前記可変位相遅れフィルタは、前記制御信号が入力される制御入力を備えることを特徴とする、請求項4に記載の装置。
- 前記フェーズエラー補正手段は、固定位相シフトフィルタをさらに備えることを特徴とする、請求項4又は請求項5に記載の装置。
- 前記固定位相シフトフィルタは、前記サブチャンネル信号処理部の前記入力と前記可変位相遅れフィルタとの間に結合されることを特徴とする、請求項6に記載の装置。
- 主チャンネル信号処理部をさらに備え、
前記主チャンネル信号処理部は、前記フェーズエラー補正手段の処理時間に本質的に対応する遅延時間だけ主チャンネル信号を遅延させる遅延手段を備えることを特徴とする、請求項1乃至請求項7の少なくともいずれか1つに記載の装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02015376 | 2002-07-10 | ||
PCT/IB2003/003047 WO2004008633A2 (en) | 2002-07-10 | 2003-07-01 | A stereo signal processing apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005532762A JP2005532762A (ja) | 2005-10-27 |
JP4327087B2 true JP4327087B2 (ja) | 2009-09-09 |
Family
ID=30011070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004520999A Expired - Fee Related JP4327087B2 (ja) | 2002-07-10 | 2003-07-01 | ステレオ信号処理装置 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7894609B2 (ja) |
EP (1) | EP1522209B1 (ja) |
JP (1) | JP4327087B2 (ja) |
CN (1) | CN1666570B (ja) |
AT (1) | ATE451795T1 (ja) |
AU (1) | AU2003281100A1 (ja) |
DE (1) | DE60330459D1 (ja) |
WO (1) | WO2004008633A2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7720237B2 (en) * | 2004-09-07 | 2010-05-18 | Audyssey Laboratories, Inc. | Phase equalization for multi-channel loudspeaker-room responses |
US9699558B2 (en) | 2012-12-12 | 2017-07-04 | Apple Inc. | Creation of sub-sample delays in digital audio |
US9819523B2 (en) * | 2016-03-09 | 2017-11-14 | Qualcomm Incorporated | Intelligent equalization for a three-transmitter multi-phase system |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
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US3778602A (en) * | 1970-10-30 | 1973-12-11 | King Radio Corp | Area navigation computer and solid state filter |
JPS581372B2 (ja) | 1972-07-11 | 1983-01-11 | チヨウオンパコウギヨウ カブシキガイシヤ | チヨウオンパオンソクソクテイソウチ |
JPS49134302A (ja) | 1973-04-25 | 1974-12-24 | ||
US4533951A (en) * | 1982-09-27 | 1985-08-06 | Rca Corporation | System for generating and displaying a compatible high definition television signal by progressive scanning |
US4533960A (en) * | 1982-09-09 | 1985-08-06 | General Electric Company | System for encoding and decoding video signals |
US4654707A (en) * | 1985-04-08 | 1987-03-31 | Zenith Electronics Corporation | Method and apparatus for volume control of a BTSC multi-channel sound signal |
JP2629739B2 (ja) | 1987-09-30 | 1997-07-16 | 松下電器産業株式会社 | 音声信号減衰装置 |
US4910778A (en) * | 1987-10-16 | 1990-03-20 | Barton Geoffrey J | Signal enhancement processor for stereo system |
KR920009727B1 (ko) | 1989-02-27 | 1992-10-22 | 삼성전자 주식회사 | 고선명 tv용 자동위상 보정기 |
US5091957A (en) * | 1990-04-18 | 1992-02-25 | Thomson Consumer Electronics, Inc. | Wideband expander for stereo and SAP signals |
US5241687A (en) * | 1991-02-14 | 1993-08-31 | Bose Corporation | Phase controlling phase of local subcarrier signal to correspond to transmitted pilot signal |
US5224170A (en) * | 1991-04-15 | 1993-06-29 | Hewlett-Packard Company | Time domain compensation for transducer mismatch |
JP3089104B2 (ja) * | 1992-06-19 | 2000-09-18 | 株式会社日立製作所 | 移動平均フィルタ、及びこれを用いたa/d変換器 |
US5377272A (en) | 1992-08-28 | 1994-12-27 | Thomson Consumer Electronics, Inc. | Switched signal processing circuit |
US5373562A (en) | 1992-08-28 | 1994-12-13 | Thomson Consumer Electronics, Inc. | Signal processor for sterophonic signals |
JPH07311585A (ja) | 1994-05-17 | 1995-11-28 | Sony Corp | ボーカルキャンセル回路 |
US8908872B2 (en) * | 1996-06-07 | 2014-12-09 | That Corporation | BTSC encoder |
US6037993A (en) | 1997-03-17 | 2000-03-14 | Antec Corporation | Digital BTSC compander system |
DE19721487A1 (de) * | 1997-05-23 | 1998-11-26 | Thomson Brandt Gmbh | Verfahren und Vorrichtung zur Fehlerverschleierung bei Mehrkanaltonsignalen |
DE60230386D1 (de) | 2001-02-09 | 2009-01-29 | Thx Ltd | Tonsystem und verfahren zur tonwiedergabe |
FR2820820B1 (fr) * | 2001-02-15 | 2004-04-16 | Commissariat Energie Atomique | Dispositif de calibrage d'un capteur de pression, notamment d'un capteur de pression infrasonore |
-
2003
- 2003-07-01 AT AT03740954T patent/ATE451795T1/de not_active IP Right Cessation
- 2003-07-01 JP JP2004520999A patent/JP4327087B2/ja not_active Expired - Fee Related
- 2003-07-01 CN CN038160765A patent/CN1666570B/zh not_active Expired - Fee Related
- 2003-07-01 US US10/520,316 patent/US7894609B2/en not_active Expired - Fee Related
- 2003-07-01 DE DE60330459T patent/DE60330459D1/de not_active Expired - Lifetime
- 2003-07-01 EP EP03740954A patent/EP1522209B1/en not_active Expired - Lifetime
- 2003-07-01 AU AU2003281100A patent/AU2003281100A1/en not_active Abandoned
- 2003-07-01 WO PCT/IB2003/003047 patent/WO2004008633A2/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CN1666570A (zh) | 2005-09-07 |
DE60330459D1 (de) | 2010-01-21 |
CN1666570B (zh) | 2010-05-12 |
ATE451795T1 (de) | 2009-12-15 |
US7894609B2 (en) | 2011-02-22 |
AU2003281100A1 (en) | 2004-02-02 |
EP1522209B1 (en) | 2009-12-09 |
JP2005532762A (ja) | 2005-10-27 |
EP1522209A2 (en) | 2005-04-13 |
AU2003281100A8 (en) | 2004-02-02 |
WO2004008633A2 (en) | 2004-01-22 |
US20050254659A1 (en) | 2005-11-17 |
WO2004008633A3 (en) | 2004-04-22 |
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