JP5249038B2 - 信号処理で時間遅延を補償する方法 - Google Patents
信号処理で時間遅延を補償する方法 Download PDFInfo
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- JP5249038B2 JP5249038B2 JP2008537581A JP2008537581A JP5249038B2 JP 5249038 B2 JP5249038 B2 JP 5249038B2 JP 2008537581 A JP2008537581 A JP 2008537581A JP 2008537581 A JP2008537581 A JP 2008537581A JP 5249038 B2 JP5249038 B2 JP 5249038B2
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
- H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/18—Vocoders using multiple modes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
- H04S7/30—Control circuits for electronic adaptation of the sound field
Description
Claims (5)
- 時間ドメインのダウンミックス信号及び空間情報を含むオーディオ信号を受信する段階と、
前記時間ドメインのダウンミックス信号をコンプレックス直交ミラーフィルタ(QMF)ドメインのダウンミックス信号に変換する段階と、
前記コンプレックスQMFドメインのダウンミックス信号を時間遅延差だけ遅延させる段階であって、前記時間遅延差は低電力デコーディング方式と高音質デコーディング方式との差によって生ずる、段階と、
前記遅延されたダウンミックス信号と前記空間情報とを結合する段階と、
を有し、
前記低電力デコーディング方式は、前記時間ドメインのダウンミックス信号をリアルQMFドメインのダウンミックス信号に変換する段階と、前記リアルQMFドメインのダウンミックス信号をコンプレックスQMFドメインのダウンミックス信号に変換する段階とを含み、前記高音質デコーディング方式は、前記時間ドメインのダウンミックス信号を、コンプレックスQMFドメインのダウンミックス信号に直接変換する段階を含む、オーディオ信号処理方法。 - 前記空間情報は、エンコーディング遅延及びデコーディング遅延のうち少なくとも一つによって時間遅延される、請求項1に記載のオーディオ信号処理方法。
- 前記時間遅延差は、前記リアルQMFドメインのダウンミックス信号を前記コンプレックスQMFドメインのダウンミックス信号に変換する際に経過する時間に等しい、請求項1に記載のオーディオ信号処理方法。
- 時間ドメインのダウンミックス信号及び空間情報を含むオーディオ信号を受信するオーディオ信号受信部と、
前記時間ドメインのダウンミックス信号をコンプレックス直交ミラーフィルタ(QMF)ドメインのダウンミックス信号に変換するドメイン変換部と、
前記コンプレックスQMFドメインのダウンミックス信号を時間遅延差だけ遅延させる信号遅延処理部であって、前記時間遅延差は低電力デコーディング方式と高音質デコーディング方式との差によって生ずる、信号遅延処理部と、
前記遅延されたダウンミックス信号と前記空間情報とを結合する空間情報結合部と、
を備え、
前記低電力デコーディング方式は、前記時間ドメインのダウンミックス信号をリアルQMFドメインのダウンミックス信号に変換する段階と、前記リアルQMFドメインのダウンミックス信号をコンプレックスQMFドメインのダウンミックス信号に変換する段階とを含み、前記高音質デコーディング方式は、前記時間ドメインのダウンミックス信号を、コンプレックスQMFドメインのダウンミックス信号に直接変換する段階を含む、オーディオ信号処理装置。 - 前記時間遅延差は、前記リアルQMFドメインのダウンミックス信号を前記コンプレックスQMFドメインのダウンミックス信号に変換する際に経過する時間に等しい、請求項4に記載のオーディオ信号処理装置。
Applications Claiming Priority (21)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72922505P | 2005-10-24 | 2005-10-24 | |
US60/729,225 | 2005-10-24 | ||
US75700506P | 2006-01-09 | 2006-01-09 | |
US60/757,005 | 2006-01-09 | ||
US78674006P | 2006-03-29 | 2006-03-29 | |
US60/786,740 | 2006-03-29 | ||
US79232906P | 2006-04-17 | 2006-04-17 | |
US60/792,329 | 2006-04-17 | ||
KR10-2006-0078225 | 2006-08-18 | ||
KR1020060078222A KR20070037985A (ko) | 2005-10-04 | 2006-08-18 | 다채널 오디오 신호의 디코딩 방법 및 그 장치 |
KR1020060078223A KR20070037986A (ko) | 2005-10-04 | 2006-08-18 | 다채널 오디오 신호의 처리방법 및 그 장치 |
KR10-2006-0078221 | 2006-08-18 | ||
KR10-2006-0078218 | 2006-08-18 | ||
KR1020060078225A KR20070037987A (ko) | 2005-10-04 | 2006-08-18 | 다채널 오디오 신호의 디코딩 방법 및 장치 |
KR1020060078221A KR20070037984A (ko) | 2005-10-04 | 2006-08-18 | 다채널 오디오 신호의 디코딩 방법 및 그 장치 |
KR10-2006-0078223 | 2006-08-18 | ||
KR1020060078219A KR20070074442A (ko) | 2006-01-09 | 2006-08-18 | 다채널 오디오 복원 장치 및 방법과 이 장치에서 수행되는프로그램을 기록한 컴퓨터로 읽을 수 있는 기록 매체 |
KR10-2006-0078219 | 2006-08-18 | ||
KR10-2006-0078222 | 2006-08-18 | ||
KR1020060078218A KR20070037983A (ko) | 2005-10-04 | 2006-08-18 | 다채널 오디오 신호의 디코딩 방법 및 부호화된 오디오신호 생성방법 |
PCT/KR2006/003974 WO2007049863A2 (en) | 2005-10-24 | 2006-10-02 | Removing time delays in signal paths |
Publications (2)
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JP2009512901A JP2009512901A (ja) | 2009-03-26 |
JP5249038B2 true JP5249038B2 (ja) | 2013-07-31 |
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JP2008537584A Active JP5270358B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537579A Active JP5399706B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537583A Active JP5249039B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537582A Pending JP2009513084A (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537580A Active JP5270357B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537581A Active JP5249038B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
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JP2008537584A Active JP5270358B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537579A Active JP5399706B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537583A Active JP5249039B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537582A Pending JP2009513084A (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
JP2008537580A Active JP5270357B2 (ja) | 2005-10-24 | 2006-10-02 | 信号処理で時間遅延を補償する方法 |
Country Status (11)
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US (8) | US7761289B2 (ja) |
EP (6) | EP1952672B1 (ja) |
JP (6) | JP5270358B2 (ja) |
KR (7) | KR100888971B1 (ja) |
CN (6) | CN101297597B (ja) |
AU (1) | AU2006306942B2 (ja) |
BR (1) | BRPI0617779A2 (ja) |
CA (1) | CA2626132C (ja) |
HK (1) | HK1126071A1 (ja) |
TW (6) | TWI317243B (ja) |
WO (6) | WO2007049866A1 (ja) |
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