JP2013527493A - 複数のマイクによるロバストな雑音抑制 - Google Patents
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- G10L21/00—Speech or voice signal processing techniques 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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- G10L21/0208—Noise filtering
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- G10L21/00—Speech or voice signal processing techniques 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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- G10L21/00—Speech or voice signal processing techniques 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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- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
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- G—PHYSICS
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- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques 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
- G10L21/0208—Noise filtering
- G10L21/0216—Noise filtering characterised by the method used for estimating noise
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Abstract
Description
米国特許出願第12/215,980号(タイトル「System and Method for Providing Noise Suppression Utilizing Null Processing Noise Subtraction」、2008年6月30日出願)、
米国特許出願第12/422,917号(タイトル「Adaptive Noise Cancellation」、2009年4月13日出願)、
米国特許出願第12/693,998号(タイトル「Adaptive Noise Reduction Using Level Cues」、2010年1月26日出願)、
において開示される。ここで、これらの内容を、本明細書に援用する。
Claims (19)
- 音声信号の雑音低減を実行するシステムであって:
メモリと;
前記メモリに保管され、プロセッサによって実行される周波数分析モジュールであって、時間領域の音響信号から、蝸牛領域のサブバンド信号を生成する、周波数分析モジュールと;
前記メモリに保管され、プロセッサにより実行される雑音消去モジュールであって、前記サブバンド信号の少なくとも一部を消去する、雑音消去モジュールと;
前記メモリに保管され、プロセッサにより実行される調整モジュールであって、変更された前記サブバンド信号の雑音成分又はエコー成分を抑制する、調整モジュールと;
前記メモリに保管され、プロセッサにより実行される再構成モジュールであって、前記調整モジュールにより提供される、成分が抑制された前記サブバンド信号から、変更された時間領域の信号を再構成する、再構成モジュールと;
を有する、システム。 - 前記時間領域の音響信号は、オーディオ装置の一以上のマイクの信号から受信される、
請求項1に記載のシステム。 - 前記メモリに保管され、プロセッサにより実行される特徴抽出モジュールであって、前記サブバンド信号の特徴を決定し、前記特徴は、前記音響信号の一連のフレームのうちの各フレームに対して決定される、特徴抽出モジュール
をさらに有する、請求項1に記載のシステム。 - 前記特徴抽出モジュールは、第一の音響信号と、第二の音響信号、第三の音響信号又は他の音響信号との間の、マイク間のレベル差又はマイク間の時間差若しくは位相差に基づいて、前記雑音消去モジュール又は前記調整モジュールの適応を制御するよう構成される、
請求項3に記載のシステム。 - 前記雑音消去モジュールは、前記サブバンド信号から、雑音成分を取り去るか、又は、エコー成分を取り去ることにより、前記サブバンド信号の少なくとも一部分を消去する、
請求項1に記載のシステム。 - 前記メモリに保管され、プロセッサにより実行される特徴抽出モジュールであって、前記サブバンド信号の特徴を決定し、前記特徴は、前記音響信号の一連のフレームのうちの各フレームに対して決定される、特徴抽出モジュール
をさらに有し、
前記特徴は、前記特徴抽出モジュールにおいて、前記雑音消去モジュールの出力と、ゼロ化処理のマイク間のレベル差のような、受信した入力信号とから算出される、
請求項5に記載のシステム。 - 前記メモリに保管され、プロセッサにより実行されるマスク生成モジュールであって、マスクを生成し、前記マスクは、前記調整モジュールによって、前記雑音消去モジュールにより出力されたサブバンド信号へと適用されるよう構成される、マスク生成モジュール
をさらに有する、請求項1に記載のシステム。 - 前記メモリに保管され、プロセッサにより実行される特徴抽出モジュールであって、前記サブバンド信号の特徴を決定し、前記特徴は、前記音響信号の一連のフレームのうちの各フレームに対して決定される、特徴抽出モジュール
をさらに有し、
前記マスクは、前記特徴抽出モジュールにおいて求められた一以上の特徴の一部に基づいて決定される、
請求項7に記載のシステム。 - 前記マスクは、前記第一の音響信号の各サブバンドの、音声損失歪みの閾値レベル、雑音若しくはエコー抑制の所望のレベル、又は推定される信号対雑音比のうちの少なくとも一部に基づいて決定される、
請求項8に記載のシステム。 - 音響信号の雑音低減を実行する方法であって:
プロセッサが、周波数分析モジュールを実行し、時間領域の音響信号から、蝸牛領域のサブバンド信号を生成する段階と;
プロセッサが、雑音消去モジュールを実行し、前記サブバンド信号の少なくとも一部を消去する段階と;
プロセッサが、調整モジュールを実行し、変更された前記サブバンド信号の雑音成分又はエコー成分を抑制する段階と;
プロセッサが、再構成モジュールを実行し、前記抑制する段階において提供される、成分が抑制された前記サブバンド信号から、変更された時間領域の信号を再構成する段階と;
を有する、方法。 - オーディオ装置の一以上のマイクの信号から前記時間領域の音響信号を受信する段階
をさらに有する、請求項10に記載の方法。 - 前記サブバンド信号の特徴を決定する段階であって、前記特徴は、前記音響信号の一連のフレームのうちの各フレームに対して決定される、段階
をさらに有する、請求項10に記載の方法。 - 第一の音響信号と、第二の音響信号、第三の音響信号又は他の音響信号との間の、マイク間のレベル差又はマイク間の時間差若しくは位相差に基づいて、前記雑音消去モジュール又は前記調整モジュールの適応を制御する段階
をさらに有する、請求項12に記載の方法。 - 前記サブバンド信号から、雑音成分を取り去るか、又は、エコー成分を取り去ることにより、前記サブバンド信号の少なくとも一部分を消去する段階
をさらに有する、請求項10に記載の方法。 - 前記サブバンド信号の特徴を決定する段階であって、前記特徴は、前記音響信号の一連のフレームのうちの各フレームに対して決定される、段階
をさらに有し、
前記特徴は、前記特徴抽出モジュールにおいて、前記雑音消去モジュールの出力と、受信した入力信号とから算出される、
請求項14に記載の方法。 - マスクを生成する段階であって、前記マスクは、前記調整モジュールによって、前記雑音消去モジュールにより出力されたサブバンド信号へと適用されるよう構成される、段階
をさらに有する、請求項10に記載の方法。 - 前記サブバンド信号の特徴を決定する段階であって、前記特徴は、前記音響信号の一連のフレームのうちの各フレームに対して決定される、段階
をさらに有し、
前記マスクは、前記特徴抽出モジュールにおいて求められた一以上の特徴の一部に基づいて決定される、
請求項16に記載の方法。 - 前記マスクは、前記第一の音響信号の各サブバンドの、音声損失歪みの閾値レベル、雑音若しくはエコー抑制の所望のレベル、又は推定される信号対雑音比のうちの少なくとも一部に基づいて決定される、
請求項17に記載の方法。 - プロセッサに音響信号の雑音低減を実行する方法を実行させるプログラムを保管するコンピュータ読取可能な記憶媒体であって、前記方法は:
時間領域の音響信号から、蝸牛領域のサブバンド信号を生成する段階と;
前記サブバンド信号の少なくとも一部を消去する段階と;
変更された前記サブバンド信号の雑音成分又はエコー成分を抑制する段階と;
前記抑制する段階において提供される、成分が抑制された前記サブバンド信号から、変更された時間領域の信号を再構成する段階と;
を有する、記憶媒体。
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US32932210P | 2010-04-29 | 2010-04-29 | |
US61/329,322 | 2010-04-29 | ||
US12/832,920 US8538035B2 (en) | 2010-04-29 | 2010-07-08 | Multi-microphone robust noise suppression |
US12/832,920 | 2010-07-08 | ||
PCT/US2011/034373 WO2011137258A1 (en) | 2010-04-29 | 2011-04-28 | Multi-microphone robust noise suppression |
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JP (1) | JP2013527493A (ja) |
KR (1) | KR20130108063A (ja) |
TW (1) | TWI466107B (ja) |
WO (1) | WO2011137258A1 (ja) |
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US20130322643A1 (en) | 2013-12-05 |
TW201205560A (en) | 2012-02-01 |
KR20130108063A (ko) | 2013-10-02 |
TWI466107B (zh) | 2014-12-21 |
US9438992B2 (en) | 2016-09-06 |
WO2011137258A1 (en) | 2011-11-03 |
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