A Generative Product-of-Filters Model of Audio
نویسندگان
چکیده
We propose the product-of-filters (PoF) model, a generative model that decomposes audio spectra as sparse linear combinations of “filters” in the log-spectral domain. PoF makes similar assumptions to those used in the classic homomorphic filtering approach to signal processing, but replaces decompositions built of basic signal processing operations with a learned decomposition based on statistical inference. This paper formulates the PoF model and derives a mean-field method for posterior inference and a variational EM algorithm to estimate the model’s free parameters. We demonstrate PoF’s potential for audio processing on a bandwidth expansion task, and show that PoF can serve as an effective unsupervised feature extractor for a speaker identification task.
منابع مشابه
Generative Feedback Networks Using Time-Varying Allpass Filters
Audio signal processing applications of first and second-order allpass filters are discussed. Stability issues can arise when second-order allpass filters are made time varying. This is demonstrated analytically and experimentally. A solution, in the form of a power-preserving matrix formulation of the second-order allpass is presented. This filter is studied with applications to feedback syste...
متن کاملUnsupervised Filterbank Learning Using Convolutional Restricted Boltzmann Machine for Environmental Sound Classification
In this paper, we propose to use Convolutional Restricted Boltzmann Machine (ConvRBM) to learn filterbank from the raw audio signals. ConvRBM is a generative model trained in an unsupervised way to model the audio signals of arbitrary lengths. ConvRBM is trained using annealed dropout technique and parameters are optimized using Adam optimization. The subband filters of ConvRBM learned from the...
متن کاملA Comparison of Generative and Discriminative Appliance Recognition Models for Load Monitoring
Appliance-level Load Monitoring (ALM) is essential not only to optimize energy utilization but also to promote energy awareness amongst consumers through real-time feedback mechanisms. Non-intrusive load monitoring is an attractive method to perform ALM that allows tracking of appliance states within the aggregated power measurements. It makes use of generative and discriminative machine learni...
متن کاملEvaluation of Leukoreduction in Packed Cell Units Filtered by Home-Made Bedside Filters: Pre and Post Revision of Product Technology and Materials According to Standard Values
Introduction: Leukocytes causing a wide variety of side effects after transfusion are present in all blood products prepared by standard methods. As a consequence, the use of filter technology for leukoreduction has been widely practiced .According to AABB accreditation in 1996, leukoreduced blood components must contain less than 5×106 leukocytes per unit, but sometimes this value is higher ev...
متن کاملTabla Gyan: An Artificial Tabla Improviser
We describe Tabla Gyan, a system capable of improvising tabla solo music, a sophisticated percussion tradition from North India. The system is based on a generative model of the qaida, a central form in tabla solo based on thematic variation. The system uses a recombinative process of variation generation, and filters the results according to rhythmic and timbral characteristics of each phrase....
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- CoRR
دوره abs/1312.5857 شماره
صفحات -
تاریخ انتشار 2013