JP4795919B2 - 音声区間検出方法 - Google Patents
音声区間検出方法 Download PDFInfo
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- JP4795919B2 JP4795919B2 JP2006329871A JP2006329871A JP4795919B2 JP 4795919 B2 JP4795919 B2 JP 4795919B2 JP 2006329871 A JP2006329871 A JP 2006329871A JP 2006329871 A JP2006329871 A JP 2006329871A JP 4795919 B2 JP4795919 B2 JP 4795919B2
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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
- G10L15/00—Speech recognition
- G10L15/24—Speech recognition using non-acoustical features
- G10L15/25—Speech recognition using non-acoustical features using position of the lips, movement of the lips or face analysis
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/78—Detection of presence or absence of voice signals
- G10L25/87—Detection of discrete points within a voice signal
Description
210 映像受信部
220 唇動き信号検出部
230 音声区間検出部
240 特徴ベクトル抽出部
250 音声認識部
260 データベース
Claims (7)
- 音響受信部及び映像受信部を備える音声認識システムにおいて音声区間を検出する方法であって、
前記音響受信部から出力される音響フレームを対象として雑音を除去し、前記雑音が除去された音響フレームが音声可能フレームであるか否かを判断する段階と、
前記判断結果、前記音響フレームが音声可能フレームなら、前記音声可能フレームが検出される時点に映像フレームで唇動き信号が検出されるか否かを判断する段階と、
前記判断結果、前記映像フレームで唇動き信号が検出される場合、前記音声可能フレームを音声フレームとして判断して格納し、音声フレームの個数が予め定められた一定個数以上であるか否かを判断する段階と、
前記判断結果、音声フレームの個数が予め定められた一定個数以上である場合、当該音声フレームを音声区間として検出する段階と、を備えることを特徴とする音声区間検出方法。 - 前記音響受信部から出力される音響フレームの静的雑音を除去することは、前記音響フレームに対して低域通過フィルタリングを行い、高域成分を除去することを特徴とする請求項1に記載の音声区間検出方法。
- 前記雑音が除去された音響フレームが音声可能フレームであるか否かを判断する段階は、前記雑音が除去された音響フレームに対して絶対エネルギー大きさとゼロ交差率を分析し、音声可能フレームであるか又は雑音フレームであるかを判断することを特徴とする請求項1に記載の音声区間検出方法。
- 前記音声可能フレームが検出される時点に映像フレームで唇動き信号が検出されるか否かを判断する段階は、
連続して受信される映像フレームで以前フレームと現在フレームに対してピクセル単位でピクセル値を比較し、動き領域を検出する段階と、
前記検出された動き領域毎に大きさ、幅、長さ、位置情報を把握する段階と、
前記把握された動き領域の特徴に唇動き映像特徴情報を適用して唇動き領域であるか否かを判断し、当該判断結果に基づいて唇動き信号を生成する段階と、を備えることを特徴とする請求項1に記載の音声区間検出方法。 - 前記唇動き映像特徴情報は、唇の形状と唇の変化を含むことを特徴とする請求項4に記載の音声区間検出方法。
- 前記把握された動き領域の特徴に唇動き映像特徴情報を適用して唇動き領域であるか否かを判断し、当該判断結果に基づいて唇動き信号を検出する段階は、
前記把握された動き領域の特徴と前記唇動き映像特徴情報とを比較し、類似度を求める段階と、
前記求められた類似度が予め定められた一定値以上である場合、唇動き領域として判断し、唇動き信号を生成する段階と、を備えることを特徴とする請求項4に記載の音声区間検出方法。 - 前記判断結果、前記映像フレームで唇動き信号が検出されない場合、当該音声可能フレームを動的雑音として判断する段階をさらに備えることを特徴とする請求項1に記載の音声区間検出方法。
Applications Claiming Priority (4)
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KR20050120040 | 2005-12-08 | ||
KR10-2005-0120040 | 2005-12-08 | ||
KR10-2006-0064262 | 2006-07-10 | ||
KR1020060064262A KR100820141B1 (ko) | 2005-12-08 | 2006-07-10 | 음성 구간 검출 장치 및 방법 그리고 음성 인식 시스템 |
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