Audio Time-Scale Modification
نویسندگان
چکیده
منابع مشابه
Real-time Pitch-shifting of Musical Signals by a Time-varying Factor Using Normalized Filtered Correlation Time-scale Modification (nfc-tsm)
This paper presents a high-quality real-time pitch-shifting algorithm with a time-varying factor for monophonic audio and musical signals. The pitch-shifting algorithm is based on the resampling and time-scale modification method. A new time-scale modification method has been developed which is called the Normalized Filtered Correlation Time-Scale Modification (NFC-TSM) method. It uses a ring b...
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Frequency-domain approaches to audio time-scale modification introduce a reverberant/phasy artefact into the time-scaled output. Such artefacts are generally not present within time-domain implementations; however, high quality time-scaling in the timedomain is typically limited to quasi-periodic signals such as speech. A hybrid method of time-scaling is presented which draws upon appealing asp...
متن کاملTime-Scale Modification of Speech using a Synchronised and Adaptive Overlap-Add (SAOLA) Algorithm
The synchronised overlap-add (SOLA) algorithm is a commercially popular and considerably researched audio time-scale modification technique. It operates in the time domain and uses a correlation technique to ensure that synthesis frames overlap in a synchronous manner. We present a modification to SOLA that allows the analysis step size adapt to the desired time-scale factor. The synchronised a...
متن کاملAn Efficient Phasiness Reduction Technique for Moderate Audio Time-scale Modification
Phase vocoder approaches to time-scale modification of audio introduce a reverberant/phasy artifact into the time-scaled output due to a loss in phase coherence between short-time Fourier transform (STFT) bins. Recent improvements to the phase vocoder have reduced the presence of this artifact, however, it remains a problem. A method of time-scaling is presented that results in a further reduct...
متن کاملFast Time Scale Modification Using Envelope-Matching Technique (EM-TSM)
We propose a technique called Envelop-Matching for Time Scale Modification (EM-TSM). This technique is the modification of a technique called synchronized overlap-and-add (SOLA) [5] with the computation complexity significantly reduced. The reduction in computation complexity is useful the fast browsing of audio or video, which can be implemented by a general single-processor machine.
متن کاملImproved Phase Vocoder Time-scale Modification Of Audio - Speech and Audio Processing, IEEE Transactions on
The phase vocoder is a well-established tool for time scaling and pitch shifting speech and audio signals via modification of their short-time Fourier transforms (STFT’s). In contrast to time-domain time-scaling and pitch-shifting techniques, the phase vocoder is generally considered to yield high quality results, especially for large modification factors and/or polyphonic signals. However, the...
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