JP2011002652A5 - Audio processing apparatus and audio processing method - Google Patents

Audio processing apparatus and audio processing method Download PDF

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JP2011002652A5
JP2011002652A5 JP2009145456A JP2009145456A JP2011002652A5 JP 2011002652 A5 JP2011002652 A5 JP 2011002652A5 JP 2009145456 A JP2009145456 A JP 2009145456A JP 2009145456 A JP2009145456 A JP 2009145456A JP 2011002652 A5 JP2011002652 A5 JP 2011002652A5
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sound
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amplification factor
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本発明の音声処理装置は、かかる目的を達成するために、複数の集音手段と、前記複数の集音手段により得られた音声信号を処理する処理手段を有し、前記処理手段は、前記集音手段により得られた音声信号を所定の増幅率より大きくならない増幅率で増幅し、前記集音手段により得られた音声信号に含まれる風による雑音の大きさに応じて、前記所定の増幅率を変更することを特徴とする。 In order to achieve the above object, the sound processing apparatus of the present invention has a plurality of sound collecting means and a processing means for processing sound signals obtained by the plurality of sound collecting means. The sound signal obtained by the sound collecting means is amplified with an amplification factor that is not larger than a predetermined gain, and the predetermined amplification is performed according to the magnitude of wind noise included in the sound signal obtained by the sound collecting means. It is characterized by changing the rate .

Claims (25)

複数の集音手段と、A plurality of sound collecting means;
前記複数の集音手段により得られた音声信号を処理する処理手段を有し、Processing means for processing audio signals obtained by the plurality of sound collecting means;
前記処理手段は、前記集音手段により得られた音声信号を所定の増幅率より大きくならない増幅率で増幅し、前記集音手段により得られた音声信号に含まれる風による雑音の大きさに応じて、前記所定の増幅率を変更することを特徴とする音声処理装置。The processing means amplifies the audio signal obtained by the sound collecting means with an amplification factor that does not become larger than a predetermined amplification factor, and according to the magnitude of noise caused by wind included in the audio signal obtained by the sound collecting means. And changing the predetermined amplification factor. 前記処理手段は、風による雑音の大きさが大きいほど、前記所定の増幅率を小さくすることを特徴とする請求項１記載の音声処理装置。The speech processing apparatus according to claim 1, wherein the processing unit reduces the predetermined amplification factor as the magnitude of noise caused by wind increases. 前記処理手段は、前記複数の集音手段により得られた音声信号に基づいて、複数チャンネルの音声信号を生成することを特徴とする請求項１または２記載の音声処理装置。3. The audio processing apparatus according to claim 1, wherein the processing unit generates a plurality of channels of audio signals based on the audio signals obtained by the plurality of sound collecting units. 前記処理手段は、前記複数の集音手段により得られた音声信号に含まれる風による雑音の大きさを検出することを特徴とする請求項１から３のいずれか１項記載の音声処理装置。The sound processing apparatus according to any one of claims 1 to 3, wherein the processing means detects the magnitude of noise caused by wind contained in the sound signals obtained by the plurality of sound collecting means. 前記処理手段は、前記複数の集音手段により得られた音声信号の差成分に基づいて風による雑音の大きさを検出することを特徴とする請求項４記載の音声処理装置。5. The sound processing apparatus according to claim 4, wherein the processing means detects the magnitude of noise caused by wind based on the difference component of the sound signals obtained by the plurality of sound collecting means. 前記処理手段は、前記複数の集音手段により得られた音声信号に含まれる風による雑音を低減することを特徴とする請求項１から５のいずれか１項記載の音声処理装置。The sound processing apparatus according to claim 1, wherein the processing unit reduces noise caused by wind included in the sound signals obtained by the plurality of sound collecting units. 前記処理手段は、前記複数の集音手段により得られた音声信号に含まれる風による雑音を低減した後に、前記所定の増幅率より大きくならない増幅率で増幅することを特徴とする請求項６記載の音声処理装置。7. The processing unit according to claim 6, wherein after the noise caused by the wind included in the audio signals obtained by the plurality of sound collecting units is reduced, the processing unit amplifies the signal with an amplification factor that does not exceed the predetermined amplification factor. Voice processing device. 前記処理手段は、第１の集音手段により得られた音声信号と第２の集音手段により得られた音声信号とに基づいて風による雑音の大きさを検出すると共に、第３の集音手段により得られた音声信号と第４の集音手段により得られた音声信号とにもとづいて風による雑音の大きさを検出し、The processing means detects the magnitude of noise caused by wind based on the sound signal obtained by the first sound collecting means and the sound signal obtained by the second sound collecting means, and the third sound collecting means. Detecting the magnitude of noise caused by wind based on the voice signal obtained by the means and the voice signal obtained by the fourth sound collecting means;
前記処理手段は、第１の集音手段により得られた音声信号と第２の集音手段により得られた音声信号とに基づいて検出された風による雑音の大きさと、第３の集音手段により得られた音声信号と第４の集音手段により得られた音声信号とに基づいて検出された風による雑音の大きさと、のうち大きい方の値に基づいて、前記所定の増幅率を変更することを特徴とする請求項１から７のいずれか１項記載の音声処理装置。The processing means includes a magnitude of wind noise detected based on the sound signal obtained by the first sound collecting means and the sound signal obtained by the second sound collecting means, and third sound collecting means. The predetermined amplification factor is changed based on the larger one of the magnitude of the noise caused by the wind detected based on the voice signal obtained by the above and the voice signal obtained by the fourth sound collecting means. The speech processing apparatus according to claim 1, wherein: 前記第１から第４の集音手段により得られた音声信号に基づいて、５チャンネルまたは６チャンネルの音声信号を生成することを特徴とする請求項８記載の音声処理装置。9. The audio processing apparatus according to claim 8, wherein a 5-channel or 6-channel audio signal is generated based on the audio signals obtained by the first to fourth sound collecting means. 複数の集音手段と、A plurality of sound collecting means;
前記複数の集音手段により得られた音声信号を処理する処理手段を有し、Processing means for processing audio signals obtained by the plurality of sound collecting means;
前記処理手段は、前記複数の集音手段により得られた音声信号を所定の増幅率より大きくならない増幅率で増幅し、前記複数の集音手段により得られた音声信号の差成分に応じて、前記所定の増幅率を変更することを特徴とする音声処理装置。The processing means amplifies the audio signals obtained by the plurality of sound collecting means at an amplification factor that is not greater than a predetermined amplification factor, and according to the difference component of the audio signals obtained by the plurality of sound collecting means, An audio processing apparatus, wherein the predetermined amplification factor is changed. 前記処理手段は、前記複数の集音手段により得られた音声信号の差成分が大きいほど、前記所定の増幅率を小さくすることを特徴とする請求項１０記載の音声処理装置。The audio processing apparatus according to claim 10, wherein the processing unit decreases the predetermined amplification factor as the difference component of the audio signals obtained by the plurality of sound collecting units increases. 前記処理手段は、前記複数の集音手段により得られた音声信号に基づいて、複数チャンネルの音声信号を生成することを特徴とする請求項１０または１１記載の音声処理装置。The sound processing apparatus according to claim 10 or 11, wherein the processing means generates a plurality of channels of sound signals based on the sound signals obtained by the plurality of sound collecting means. 前記処理手段は、前記複数の集音手段により得られた音声信号に含まれる風による雑音を低減することを特徴とする請求項１０から１２のいずれか１項記載の音声処理装置。The sound processing apparatus according to claim 10, wherein the processing means reduces noise caused by wind included in the sound signals obtained by the plurality of sound collecting means. 前記処理手段は、前記複数の集音手段により得られた音声信号に含まれる風による雑音を低減した後に、前記所定の増幅率より大きくならない増幅率で増幅することを特徴とする請求項１３記載の音声処理装置。14. The processing means, after reducing noise due to wind included in the audio signals obtained by the plurality of sound collecting means, amplifies the signal with an amplification factor that is not greater than the predetermined amplification factor. Voice processing device. 前記処理手段は、第１の集音手段により得られた音声信号と第２の集音手段により得られた音声信号との差成分と、第３の集音手段により得られた音声信号と第４の集音手段により得られた音声信号との差成分、のうち大きい方の値に基づいて、前記所定の増幅率を変更することを特徴とする請求項１０から１４のいずれか１項記載の音声処理装置。The processing means includes a difference component between the sound signal obtained by the first sound collecting means and the sound signal obtained by the second sound collecting means, the sound signal obtained by the third sound collecting means, and the first sound signal. 15. The predetermined amplification factor is changed based on the larger value of the difference components from the audio signal obtained by the four sound collecting means. Voice processing device. 前記第１から第４の集音手段により得られた音声信号に基づいて、５チャンネルまたは６チャンネルの音声信号を生成することを特徴とする請求項１５記載の音声処理装置。16. The audio processing apparatus according to claim 15, wherein a 5-channel or 6-channel audio signal is generated based on the audio signals obtained by the first to fourth sound collecting means. 前記処理手段は、前記複数チャンネルの音声信号を前記所定の増幅率より大きくならない増幅率で増幅することを特徴とする請求項１から１６のいずれか１項記載の音声処理装置。17. The audio processing apparatus according to claim 1, wherein the processing unit amplifies the audio signals of the plurality of channels at an amplification factor that is not greater than the predetermined amplification factor. 前記処理手段は、前記音声信号のレベルに基づいて前記増幅率を決定することを特徴とする請求項１から１７のいずれか１項記載の音声処理装置。The sound processing apparatus according to claim 1, wherein the processing unit determines the amplification factor based on a level of the sound signal. 前記所定の増幅率は、前記複数チャンネルの音声信号の音声レベルが所定のレベルより小さい場合の増幅率であることを特徴とする請求項１から１８のいずれか１項記載の音声処理装置。19. The audio processing apparatus according to claim 1, wherein the predetermined amplification factor is an amplification factor when an audio level of the audio signals of the plurality of channels is smaller than a predetermined level. 前記処理手段は、前記複数チャンネルの音声信号を圧縮することを特徴とする請求項１から１９いずれか１項記載の音声処理装置。The audio processing apparatus according to claim 1, wherein the processing unit compresses the audio signals of the plurality of channels. 動画データを取得する取得手段と、An acquisition means for acquiring video data;
前記処理手段により得られた複数チャンネルの音声信号を示す音声データと共に記録媒体に記録する記録手段とを有することを特徴とする請求項１から２０のいずれか１項記載の音声処理装置。21. The audio processing apparatus according to claim 1, further comprising recording means for recording on a recording medium together with audio data indicating audio signals of a plurality of channels obtained by the processing means. 前記複数の集音手段により得られた音声信号を所定の増幅率より大きくならない増幅率で増幅する音声処理方法であって、An audio processing method for amplifying an audio signal obtained by the plurality of sound collecting means at an amplification factor that is not greater than a predetermined amplification factor,
前記複数の前記集音手段により得られた音声信号に含まれる風による雑音の大きさに応じて、前記所定の増幅率を変更することを特徴とする音声処理方法。An audio processing method, wherein the predetermined amplification factor is changed in accordance with the magnitude of wind noise included in the audio signals obtained by the plurality of sound collecting means. 前記風による雑音の大きさが大きいほど、前記所定の増幅率を小さくすることを特徴とする請求項２２記載の音声処理方法。23. The speech processing method according to claim 22, wherein the predetermined amplification factor is reduced as the magnitude of noise due to the wind increases. 複数の集音手段により得られた音声信号を所定の増幅率より大きくならない増幅率で増幅する音声処理方法であって、An audio processing method for amplifying audio signals obtained by a plurality of sound collecting means with an amplification factor that does not become larger than a predetermined amplification factor,
前記複数の集音手段により得られた音声信号の差成分に応じて、前記所定の増幅率を変更することを特徴とする音声処理方法。An audio processing method, wherein the predetermined amplification factor is changed according to a difference component of audio signals obtained by the plurality of sound collecting means. 前記複数の集音手段により得られた音声信号の差成分が大きいほど、前記所定の増幅率を小さくすることを特徴とする請求項２４記載の音声処理方法。25. The sound processing method according to claim 24, wherein the predetermined amplification factor is decreased as the difference component of the sound signals obtained by the plurality of sound collecting means is larger.
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