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What is window length in audio signal processing?

Window function

Audio bit depth

Short-time Fourier transform

Audio signal flow

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The window length in audio signal processing refers to the duration of the window used for short-time signal analysis. Different signal conditions, such as polyphony and non-stationarity, require varying window lengths for reliable processing . In the context of audio coding, the choice of frame length, which is related to window length, is crucial for system performance . Windowing is applied to audio data to eliminate noise between blocks and to extract and normalize coefficients . The window size and corresponding transform size are determined based on measures of coding efficiency . In the short-time Fourier transform (STFT), the window length determines the resolution of the analysis and is optimized to minimize the local bandwidth of the spectrogram .

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Proceedings Article•DOI The optimal window length of STFT for sine modulated signal He Si-san, Zhao Huining, Zhou Jianxiong, Cheng Xiao, Fu Qiang - Show less +4 more 20 Apr 2009 4 Citations	The window length in audio signal processing refers to the duration of the window function used in the short-time Fourier transform (STFT) analysis.
Journal Article•DOI Signal-Driven Window-Length Adaptation for Sinusoid Detection in Polyphonic Music Vishweshwara Rao, P. Gaddipati, Preeti Rao - Show less +2 more 01 Jan 2012-IEEE Transactions on Audio, Speech, and Language Processing 12 Citations	Window length in audio signal processing refers to the duration of the data window used for analysis, which can vary depending on signal conditions such as polyphony and non-stationarity.
Journal Article•DOI Multiple length adaptive windowing of audio signals Alessandro Vanelli-Coralli, Giovanni Emanuele Corazza, A. Orsini - Show less +2 more 08 Jul 1999-Electronics Letters	The window length in audio signal processing refers to the length of the time window used to process audio samples.
Patent Digital audio encoder with window size depending on voice multiplex data presence Seong-Wan Park, Jung-Sik Yoon - Show less +1 more 07 Jun 1995 13 Citations	The window length in audio signal processing depends on the presence of multiplexed voice data. If voice data is present, the window length is 1024; otherwise, it is 512.
Patent Audio coder window sizes and time-frequency transformations Michael M. Goodwin, Kalker Antonius, Chau Albert - Show less +2 more 01 Nov 2018 1 Citations	The window length in audio signal processing refers to the size of the window used to analyze a frame of the audio signal.

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