Real-time Pitch-shifting of Musical Signals by a Time-varying Factor Using Normalized Filtered Correlation Time-scale Modification (nfc-tsm)
نویسندگان
چکیده
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 buffer for time-scaling. The best splicing point is searched in the normalized low-pass filtered signal using the Average Magnitude Difference Function (AMDF). The new method results in low-latency and high-quality pitch-shifting of musical signals.
منابع مشابه
A Review of Time-Scale Modification of Music Signals
Time-scale modification (TSM) is the task of speeding up or slowing down an audio signal’s playback speed without changing its pitch. In digital music production, TSM has become an indispensable tool, which is nowadays integrated in a wide range of music production software. Music signals are diverse—they comprise harmonic, percussive, and transient components, among others. Because of this wid...
متن کاملA novel high quality efficient algorithm for time-scale modification of speech
We present a novel efficient algorithm for time-scale modification (TSM) of speech which gives output quality equal to that of a conventional TSM algorithm, but having computational load an order of magnitude less. The algorithm presented uses a fixed length rectangular stepping window and a simple peak alignment criterion to track the local natural scaling factor and adapt the window step size...
متن کاملGeneralized envelope matching technique for time-scale modification of speech (GEM-TSM)
A new time-domain, non-pitch-synchronous method for timescale modification targeted on broadband speech is proposed. The method is based on the SOLA (synchronous overlap-add) and EM-TSM (envelope-matching time-scale modification) methods, where the sign envelope of the EM-TSM method is replaced by a generalized envelope formed by the highest bits of the samples. (The actual number of bits will ...
متن کاملVLSI implementation of a TSM/FSM algorithm
The time scale modification (TSM) of speech is concerned with the compressing or expanding of audio signals in the time domain without affecting the signals pitch or naturalness. Conversely, the frequency scale modification (FSM) of speech is concerned with altering the pitch and formants of a signal without changing the signal duration. This paper describes a hardware implemented and optimized...
متن کاملNew phase - vocoder techniques for real - time pitch - shifting , chorusing , harmonizing and other exotic audio modi
The phase-vocoder is a well-established tool for time-scaling and pitch shifting speech and audio signals. Its theory is now well understood and improvements have been proposed to reduce artifacts commonly encountered when time-expanding signals by large factors 1, 2, 3, 4]. In the literature, the phase-vocoder has been described primarily as a tool for time-scaling rather than pitch shifting, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007