JP5346051B2 - 2つ以上のオーディオ信号の処理方法 - Google Patents
2つ以上のオーディオ信号の処理方法 Download PDFInfo
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- JP5346051B2 JP5346051B2 JP2011046044A JP2011046044A JP5346051B2 JP 5346051 B2 JP5346051 B2 JP 5346051B2 JP 2011046044 A JP2011046044 A JP 2011046044A JP 2011046044 A JP2011046044 A JP 2011046044A JP 5346051 B2 JP5346051 B2 JP 5346051B2
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- 230000005236 sound signal Effects 0.000 title claims description 17
- 238000012545 processing Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 6
- 238000013507 mapping Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 239000013598 vector Substances 0.000 description 5
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
-
- 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)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Stereophonic System (AREA)
Description
本発明の実施例を添付図を参照しながら説明する。図1には受信機でのトランスペアレントなチャネルコンフィグレーション情報流が示されている。図2には受信機でのチャネルコンフィグレーション情報流のコンフリクトが示されている。図3には付加的なノードAudioChannelConfigを含む受信機が示されている。
図2について説明する。第1のデコーダ21で復号化された“5.1multichannel”信号はAudioSourceノードまたはインタフェース24を介してAudioMixノードまたはミキシング段27の第1の入力側In1へ供給される。第2のデコーダ22で復号化された“2.0stereo”信号はAudioSourceノードまたはインタフェース25を介してAudioMixノード27の第2の入力側In2へ供給される。AudioMixノード27は入力チャネルと出力チャネルとを接続するマルチチャネルスイッチであり、ここで使用される有効増幅率はオフ0およびオン1のあいだの値、例えば0.5,0.6,0.707を有する。AudioMixノード27からの“5.1multichannel”フォーマットの出力信号はAudioSwitchノードまたはスイッチャーまたはミキシング段28の第1の入力側へ供給される。さらに、第3のデコーダ23で復号化された“1(centre)”信号はAudioSourceノードまたはインタフェース26を介してAudioSwitchノード28の第2の入力側In2へ供給される。
AudioChannelConfig{
exposedField SFInt32 numChannel 0
exposedField MFInt32 phaseGroup 0
exposedField MFInt32 channelConfig 0
exposedField MFFloat channelLocation 0.0
exposedField MFFloat channelDirection 0.0
exposedField MFInt32 polarityPattern 1
}
を有している。
Claims (1)
- 異なるコンテンツプロバイダまたは放送局に関連した複数の異なるオーディオ信号源から受信または再生され、復号化されているがいまだ結合されていない2つ以上の個々のMPEG−4フォーマット・オーディオ信号の処理方法であって、
前記復号化されているオーディオ信号の少なくとも2つは、該復号化されているオーディオ信号毎に異なるチャネル数またはスピーカマッピングに対するチャネルのための異なるチャネルコンフィグレーションを有し、前記復号化されているオーディオ信号は、最終のチャネルコンフィグレーション部へ供給される前に、ミキシング部またはスイッチング部により結合され、各復号化されているオーディオ信号に相応の専用のチャネルコンフィグレーション情報アイテム(ChannelConfig)が付与され、前記2つ以上の復号化されているオーディオ信号に対する前記チャネルコンフィグレーション情報アイテムは相互のチャネルコンフィグレーションコンフリクトを生じうる、前記方法において、
前記ミキシング部または前記スイッチング部を制御して、チャネルコンフィグレーションのチャネル数またはチャネルタイプが一致しない場合、コンフリクトを解決するために、ミキシングまたはスイッチングの後に出力すべきチャネルコンフィグレーションのチャネル数またはチャネルタイプを、コンテンツプロバイダまたは放送局から供給された、関連する特定のミキシング情報またはスイッチング情報により求めるステップと、
供給される結合データストリームに対して相応に更新されたチャネルコンフィグレーション情報アイテムを付与するステップであって、前記チャネルコンフィグレーション情報アイテムの更新は、前記コンテンツプロバイダまたは放送局が最初に定義したチャネルコンフィグレーション情報アイテムを再定義することである、前記ステップと、
を含む、前記方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02026779.5 | 2002-12-02 | ||
EP02026779A EP1427252A1 (en) | 2002-12-02 | 2002-12-02 | Method and apparatus for processing audio signals from a bitstream |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004556172A Division JP5031988B2 (ja) | 2002-12-02 | 2003-11-24 | 2つ以上のオーディオ信号の処理方法および装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011150358A JP2011150358A (ja) | 2011-08-04 |
JP5346051B2 true JP5346051B2 (ja) | 2013-11-20 |
Family
ID=32309353
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004556172A Expired - Fee Related JP5031988B2 (ja) | 2002-12-02 | 2003-11-24 | 2つ以上のオーディオ信号の処理方法および装置 |
JP2011046044A Expired - Fee Related JP5346051B2 (ja) | 2002-12-02 | 2011-03-03 | 2つ以上のオーディオ信号の処理方法 |
Family Applications Before (1)
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JP2004556172A Expired - Fee Related JP5031988B2 (ja) | 2002-12-02 | 2003-11-24 | 2つ以上のオーディオ信号の処理方法および装置 |
Country Status (9)
Country | Link |
---|---|
US (1) | US8082050B2 (ja) |
EP (2) | EP1427252A1 (ja) |
JP (2) | JP5031988B2 (ja) |
KR (1) | KR101024749B1 (ja) |
CN (1) | CN100525513C (ja) |
AU (1) | AU2003288154B2 (ja) |
BR (2) | BRPI0316498B1 (ja) |
CA (1) | CA2508220C (ja) |
WO (1) | WO2004052052A2 (ja) |
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US7533210B2 (en) * | 2002-10-24 | 2009-05-12 | Sun Microsystems, Inc. | Virtual communication interfaces for a micro-controller |
US20040111677A1 (en) * | 2002-12-04 | 2004-06-10 | International Business Machines Corporation | Efficient means for creating MPEG-4 intermedia format from MPEG-4 textual representation |
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2002
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2003
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Also Published As
Publication number | Publication date |
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CA2508220A1 (en) | 2004-06-17 |
KR101024749B1 (ko) | 2011-03-24 |
EP1568250B1 (en) | 2013-01-09 |
EP1568250A2 (en) | 2005-08-31 |
AU2003288154B2 (en) | 2008-08-07 |
JP5031988B2 (ja) | 2012-09-26 |
CN100525513C (zh) | 2009-08-05 |
JP2006508592A (ja) | 2006-03-09 |
WO2004052052A3 (en) | 2004-08-12 |
EP1427252A1 (en) | 2004-06-09 |
CN1711800A (zh) | 2005-12-21 |
KR20050085262A (ko) | 2005-08-29 |
AU2003288154A1 (en) | 2004-06-23 |
US20060174267A1 (en) | 2006-08-03 |
BR0316498A (pt) | 2005-10-11 |
CA2508220C (en) | 2013-02-19 |
WO2004052052A2 (en) | 2004-06-17 |
BRPI0316498B1 (pt) | 2018-01-23 |
US8082050B2 (en) | 2011-12-20 |
JP2011150358A (ja) | 2011-08-04 |
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