JP5698189B2 - オーディオ符号化 - Google Patents
オーディオ符号化 Download PDFInfo
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- JP5698189B2 JP5698189B2 JP2012139050A JP2012139050A JP5698189B2 JP 5698189 B2 JP5698189 B2 JP 5698189B2 JP 2012139050 A JP2012139050 A JP 2012139050A JP 2012139050 A JP2012139050 A JP 2012139050A JP 5698189 B2 JP5698189 B2 JP 5698189B2
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- 238000012546 transfer Methods 0.000 claims description 32
- 230000015572 biosynthetic process Effects 0.000 claims description 27
- 238000003786 synthesis reaction Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000011159 matrix material Substances 0.000 claims description 16
- 230000005236 sound signal Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 11
- 230000001131 transforming effect Effects 0.000 claims description 5
- 230000001953 sensory effect Effects 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 description 35
- 238000012545 processing Methods 0.000 description 11
- 238000013459 approach Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 230000009118 appropriate response Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
- H04S3/004—For headphones
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
- H04S2400/01—Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
- H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
- H04S2420/03—Application of parametric coding in stereophonic audio systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Computational Linguistics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Stereophonic System (AREA)
Description
−方位角(水平面における角度)、仰角(垂直面における角度)及び距離の関数としての、左伝達関数についての周波数帯域毎の平均レベル、
−方位角、仰角及び距離の関数としての、右伝達関数についての周波数帯域毎の平均レベル、及び
−方位角、仰角及び距離の関数としての、周波数帯域毎の平均位相又は時間差。
−方位角、仰角及び距離の関数としての、HRTF周波数帯域毎の左及び右伝達関数のコヒーレンス度、及び/又は
−方位角、仰角及び距離の関数としての、左及び右伝達関数についての、絶対位相及び/又は時間パラメータ。
Claims (9)
- 入力される、2以上のオーディオチャネルの1以上のダウンミックスオーディオ入力チャネルと前記1以上のダウンミックスオーディオ入力チャネルのアップミックスのための空間パラメータとを利用して、両耳出力チャネルの対を生成するための空間デコーダユニットであって、
パラメータ化された知覚伝達関数を利用して、パラメータドメインで前記空間パラメータを両耳パラメータへと変換するためのパラメータ変換ユニットであって、前記両耳パラメータは、前記パラメータ化された知覚伝達関数及び前記空間パラメータの双方に依存する、パラメータ変換ユニットと、
前記1以上のダウンミックスオーディオ入力チャネルを、QMFドメインのオーディオ信号の対に変換する変換手段と、
QMFドメインの両耳チャネルLb及びRbの対を、
前記QMFドメインの両耳チャネルの対を、前記両耳出力チャネルの対へと逆変換するための逆変換手段と、
を有し、
前記両耳パラメータは、
- 前記パラメータ変換ユニットは、チャネルレベル、チャネルコヒーレンス、チャネル予測及び/又は位相パラメータを処理するように構成された、請求項1に記載の空間デコーダユニット。
- 前記変換手段が、該1つのダウンミックスオーディオ入力チャネルをQMFドメインの1つのオーディオ信号に変換する変換ユニットと、該1つのオーディオ信号の非相関化されたバージョンを生成するための非相関ユニットとを含み、該1つのオーディオ信号及び該非相関化されたバージョンが、前記QMFドメインのオーディオ信号の対を構成する、請求項1又は2に記載の空間デコーダユニット。
- 時間ドメインで動作するように構成されたステレオ反響ユニットを更に有する、請求項1から3いずれか1項に記載の空間デコーダユニット。
- QMFドメインにおいて動作するように構成されたステレオ反響ユニットを更に有する、請求項1から3いずれか1項に記載の空間デコーダユニット。
- 請求項1から5いずれか1項に記載の空間デコーダユニットを有する、オーディオシステム。
- 請求項1から5いずれか1項に記載の空間デコーダユニットを有する、消費者向け装置。
- 入力される、2以上のオーディオチャネルの1以上のダウンミックスオーディオ入力チャネルと前記1以上のダウンミックスオーディオ入力チャネルのアップミックスのための空間パラメータとを利用して、両耳出力チャネルの対を生成する方法であって、
パラメータ化された知覚伝達関数を利用して、パラメータドメインで前記空間パラメータを両耳パラメータへと変換するステップであって、前記両耳パラメータは、前記パラメータ化された知覚伝達関数及び前記空間パラメータの双方に依存する、ステップと、
前記1以上のダウンミックスオーディオ入力チャネルを、QMFドメインのオーディオ信号の対に変換するステップと、
QMFドメインの両耳チャネルLb及びRbの対を、
前記QMFドメインの両耳チャネルの対を、前記両耳出力チャネルの対へと逆変換するステップと、
を有し、
前記両耳パラメータは、
- 請求項8に記載の方法を実行するためのコンピュータプログラム。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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EP05108405.1 | 2005-09-13 | ||
EP05108405 | 2005-09-13 | ||
EP06110231 | 2006-02-21 | ||
EP06110231.5 | 2006-02-21 |
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JP2008529733A Division JP5587551B2 (ja) | 2005-09-13 | 2006-08-31 | オーディオ符号化 |
Publications (2)
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JP2012181556A JP2012181556A (ja) | 2012-09-20 |
JP5698189B2 true JP5698189B2 (ja) | 2015-04-08 |
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JP2008529733A Active JP5587551B2 (ja) | 2005-09-13 | 2006-08-31 | オーディオ符号化 |
JP2012139050A Active JP5698189B2 (ja) | 2005-09-13 | 2012-06-20 | オーディオ符号化 |
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US (1) | US8654983B2 (ja) |
EP (1) | EP1927266B1 (ja) |
JP (2) | JP5587551B2 (ja) |
KR (2) | KR101512995B1 (ja) |
CN (1) | CN101263742B (ja) |
BR (1) | BRPI0615899B1 (ja) |
RU (1) | RU2419249C2 (ja) |
TW (1) | TWI415111B (ja) |
WO (1) | WO2007031896A1 (ja) |
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JP2012181556A (ja) | 2012-09-20 |
JP5587551B2 (ja) | 2014-09-10 |
US8654983B2 (en) | 2014-02-18 |
CN101263742B (zh) | 2014-12-17 |
US20080205658A1 (en) | 2008-08-28 |
BRPI0615899B1 (pt) | 2019-07-09 |
EP1927266A1 (en) | 2008-06-04 |
KR20080047446A (ko) | 2008-05-28 |
KR101512995B1 (ko) | 2015-04-17 |
KR101562379B1 (ko) | 2015-10-22 |
TW200721111A (en) | 2007-06-01 |
RU2008114359A (ru) | 2009-10-20 |
EP1927266B1 (en) | 2014-05-14 |
RU2419249C2 (ru) | 2011-05-20 |
KR20150008932A (ko) | 2015-01-23 |
JP2009508157A (ja) | 2009-02-26 |
WO2007031896A1 (en) | 2007-03-22 |
TWI415111B (zh) | 2013-11-11 |
CN101263742A (zh) | 2008-09-10 |
BRPI0615899A2 (pt) | 2011-05-31 |
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