Zero-crossing rate
http://dbpedia.org/resource/Zero-crossing_rate
Le Zero Crossing Rate (souvent utilisé sous sa forme abrégée ZCR) est le taux de changement de signe d'un signal. Le ZCR a beaucoup été utilisé en reconnaissance de la parole et en . Il est défini par: où est un signal de longueur et est une fonction indicatrice qui vaut 1 si son argument est vrai et vaut 0 sinon.
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过零率（zero-crossing rate，ZCR）是指一个信号的符号变化的比率，例如信号从正数变成负数，或反过来。这个特征已在语音识别和领域得到广泛使用，是分類敲擊聲的關鍵特徵。 ZCR形式上定义为 其中是一个具有长度的信号，函数 在参数为真时为1，否则为0。 在一些应用场景下，只统计“正向”或“负向”的变化，而不是所有的方向。因为逻辑上讲，在两个连续正向过零点之间有且只有一个负向过零点。 对于单声道的音调信号，过零率可以作为一个原始的基音检测算法。
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The zero-crossing rate (ZCR) is the rate at which a signal changes from positive to zero to negative or from negative to zero to positive. Its value has been widely used in both speech recognition and music information retrieval, being a key feature to classify percussive sounds. ZCR is defined formally as where is a signal of length and is an indicator function. In some cases only the "positive-going" or "negative-going" crossings are counted, rather than all the crossings, since between a pair of adjacent positive zero-crossings there must be a single negative zero-crossing.
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Zero Crossing Rate
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Zero-crossing rate
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过零率
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4119746
xsd:integer
1020703960
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Le Zero Crossing Rate (souvent utilisé sous sa forme abrégée ZCR) est le taux de changement de signe d'un signal. Le ZCR a beaucoup été utilisé en reconnaissance de la parole et en . Il est défini par: où est un signal de longueur et est une fonction indicatrice qui vaut 1 si son argument est vrai et vaut 0 sinon.
rdf:langString
The zero-crossing rate (ZCR) is the rate at which a signal changes from positive to zero to negative or from negative to zero to positive. Its value has been widely used in both speech recognition and music information retrieval, being a key feature to classify percussive sounds. ZCR is defined formally as where is a signal of length and is an indicator function. In some cases only the "positive-going" or "negative-going" crossings are counted, rather than all the crossings, since between a pair of adjacent positive zero-crossings there must be a single negative zero-crossing. For monophonic tonal signals, the zero-crossing rate can be used as a primitive pitch detection algorithm. Zero crossing rates are also used for Voice activity detection (VAD), which determines whether human speech is present in an audio segment or not.
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过零率（zero-crossing rate，ZCR）是指一个信号的符号变化的比率，例如信号从正数变成负数，或反过来。这个特征已在语音识别和领域得到广泛使用，是分類敲擊聲的關鍵特徵。 ZCR形式上定义为 其中是一个具有长度的信号，函数 在参数为真时为1，否则为0。 在一些应用场景下，只统计“正向”或“负向”的变化，而不是所有的方向。因为逻辑上讲，在两个连续正向过零点之间有且只有一个负向过零点。 对于单声道的音调信号，过零率可以作为一个原始的基音检测算法。
xsd:nonNegativeInteger
1795