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Algoritmo di Goertzel Алгоритм Гёрцеля 格策爾演算法 Goertzel-Algorithmus Goertzel algorithm Algorithme de Goertzel
rdfs:comment
L'algoritmo di Goertzel è una tecnica di digital signal processing (DSP) utilizzata per identificare le diverse componenti infrequenza di un segnale. La più generale Fast Fourier transform (FFT) considera la completabanda passante del segnale; l'algoritmo di Goertzel si riferisce invece ad alcuni punti specifici predeterminati. Der Goertzel-Algorithmus ist ein Verfahren aus der digitalen Signalverarbeitung und stellt eine besondere Form der diskreten Fourier-Transformation (DFT) dar. Im Gegensatz zu den verschiedenen schnellen Berechnungsmethoden bei der diskreten schnellen Fourier-Transformation (FFT), die immer alle diskreten Spektralkomponenten in einem Block berechnen, ist es mit dem Goertzel-Algorithmus möglich, nur einzelne diskrete Spektralanteile zu berechnen. Entwickelt wurde der Algorithmus 1958 von (1919–2002). The Goertzel algorithm is a technique in digital signal processing (DSP) for efficient evaluation of the individual terms of the discrete Fourier transform (DFT). It is useful in certain practical applications, such as recognition of dual-tone multi-frequency signaling (DTMF) tones produced by the push buttons of the keypad of a traditional analog telephone. The algorithm was first described by Gerald Goertzel in 1958. The Goertzel algorithm can also be used "in reverse" as a sinusoid synthesis function, which requires only 1 multiplication and 1 subtraction per generated sample. 格策爾演算法或格茲爾演算法( 英語:Goertzel algorithm )是數位訊號處理的一種運算技巧，此運算技巧提供一個有效率的方式來估計部分區域的離散傅立葉轉換，廣泛的運用在數字電話中的的雙音多頻信號(每個撥號的數字鍵由兩個頻率的音所組成，一個低頻，一個高頻)，此演算法在1958年被所提出。 格策爾演算法與離散傅立葉轉換的相似處在於他們都可以分析某個特定頻段的離散訊號；相反的，它們的不同處在於，格策爾演算法每次疊代的運算都是使用實數的乘法。雖然說在全頻域的計算上，格策爾演算法會比其他的傅立葉轉換快速演算法的複雜度來的高，但是它能區段式的分析每個小區段的頻率組成，因此可以編寫成較簡單的運算架構，實際應用在處理器內的數值計算會更有效率。 格策爾演算法逆向操作生成出弦波，而這個過程只需花費一個乘法和一個加法運算。 Алгоритм Гёрцеля (англ. Goertzel algorithm) — это специальная реализация дискретного преобразования Фурье (ДПФ) в форме рекурсивного фильтра. Данный алгоритм был предложен Джеральдом Гёрцелем в 1958 году. В отличие от быстрого преобразования Фурье, вычисляющего все ДПФ, алгоритм Гёрцеля позволяет эффективно вычислить значение одного частотного компонента. Алгоритм Гёрцеля является популярным алгоритмом для решения задачи детектирования и декодирования тональных сигналов в телефонии. L'algorithme de Goertzel est un algorithme utilisé en traitement du signal pour détecter la présence d'une fréquence dans une séquence d'échantillons. Il fut publié par le physicien américain, (en), en 1958. Il s'agit d'une méthode efficace pour évaluer un terme particulier de la transformée de Fourier discrète; elle ne nécessite qu'une multiplication et deux additions par échantillon.
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Goertzel Algorithm
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The Goertzel algorithm is a technique in digital signal processing (DSP) for efficient evaluation of the individual terms of the discrete Fourier transform (DFT). It is useful in certain practical applications, such as recognition of dual-tone multi-frequency signaling (DTMF) tones produced by the push buttons of the keypad of a traditional analog telephone. The algorithm was first described by Gerald Goertzel in 1958. Like the DFT, the Goertzel algorithm analyses one selectable frequency component from a discrete signal. Unlike direct DFT calculations, the Goertzel algorithm applies a single real-valued coefficient at each iteration, using real-valued arithmetic for real-valued input sequences. For covering a full spectrum, the Goertzel algorithm has a higher order of complexity than fast Fourier transform (FFT) algorithms, but for computing a small number of selected frequency components, it is more numerically efficient. The simple structure of the Goertzel algorithm makes it well suited to small processors and embedded applications. The Goertzel algorithm can also be used "in reverse" as a sinusoid synthesis function, which requires only 1 multiplication and 1 subtraction per generated sample. Der Goertzel-Algorithmus ist ein Verfahren aus der digitalen Signalverarbeitung und stellt eine besondere Form der diskreten Fourier-Transformation (DFT) dar. Im Gegensatz zu den verschiedenen schnellen Berechnungsmethoden bei der diskreten schnellen Fourier-Transformation (FFT), die immer alle diskreten Spektralkomponenten in einem Block berechnen, ist es mit dem Goertzel-Algorithmus möglich, nur einzelne diskrete Spektralanteile zu berechnen. Entwickelt wurde der Algorithmus 1958 von (1919–2002). L'algorithme de Goertzel est un algorithme utilisé en traitement du signal pour détecter la présence d'une fréquence dans une séquence d'échantillons. Il fut publié par le physicien américain, (en), en 1958. Il s'agit d'une méthode efficace pour évaluer un terme particulier de la transformée de Fourier discrète; elle ne nécessite qu'une multiplication et deux additions par échantillon. 格策爾演算法或格茲爾演算法( 英語:Goertzel algorithm )是數位訊號處理的一種運算技巧，此運算技巧提供一個有效率的方式來估計部分區域的離散傅立葉轉換，廣泛的運用在數字電話中的的雙音多頻信號(每個撥號的數字鍵由兩個頻率的音所組成，一個低頻，一個高頻)，此演算法在1958年被所提出。 格策爾演算法與離散傅立葉轉換的相似處在於他們都可以分析某個特定頻段的離散訊號；相反的，它們的不同處在於，格策爾演算法每次疊代的運算都是使用實數的乘法。雖然說在全頻域的計算上，格策爾演算法會比其他的傅立葉轉換快速演算法的複雜度來的高，但是它能區段式的分析每個小區段的頻率組成，因此可以編寫成較簡單的運算架構，實際應用在處理器內的數值計算會更有效率。 格策爾演算法逆向操作生成出弦波，而這個過程只需花費一個乘法和一個加法運算。 Алгоритм Гёрцеля (англ. Goertzel algorithm) — это специальная реализация дискретного преобразования Фурье (ДПФ) в форме рекурсивного фильтра. Данный алгоритм был предложен Джеральдом Гёрцелем в 1958 году. В отличие от быстрого преобразования Фурье, вычисляющего все ДПФ, алгоритм Гёрцеля позволяет эффективно вычислить значение одного частотного компонента. Алгоритм Гёрцеля является популярным алгоритмом для решения задачи детектирования и декодирования тональных сигналов в телефонии. L'algoritmo di Goertzel è una tecnica di digital signal processing (DSP) utilizzata per identificare le diverse componenti infrequenza di un segnale. La più generale Fast Fourier transform (FFT) considera la completabanda passante del segnale; l'algoritmo di Goertzel si riferisce invece ad alcuni punti specifici predeterminati.
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