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Liming Shi

8 accepted papers

2024

Broadband Personal Sound Zone Control in the Presence of Nonlinearities

Sankha Subhra Bhattacharjee, Srikanth Burra, Jesper Rindom Jensen, Liming Shi, Guoli Ping, Jingkai Weng +1
ICASSP 2024accepted

Existing literature on sound zone control generally consider the signal model to be linear. However, this is seldom true in practice owing to nonlinear distortions arising from the loudspeakers, especially in consumer applications. In this paper, we propose a new signal model for personal sound zone…

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2023

Study And Design Of Robust Personal Sound Zones With Vast Using Low Rank Rirs

Sankha Subhra Bhattacharjee, Liming Shi, Guoli Ping, Xiaoxiang Shen, Mads Græsbøll Christensen
ICASSP 2023accepted

The performance of sound zone control algorithms are known to degrade significantly with changes in acoustic conditions including perturbations of control microphones' positions. In this work, we study the feasibility and effectiveness of using low rank approximations of RIRs to calculate sound zone…

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2022

Generation of Personal Sound Fields in Reverberant Environments Using Interframe Correlation

Liming Shi, Guoli Ping, Xiaoxiang Shen, Mads Græsbøll Christensen
ICASSP 2022accepted

Personal sound field control techniques aim to produce sound fields for different sound contents in different places of an acoustic space without interference. The limitations of the state-of-the-art methods for sound field control include high latency and computational complexity, especially in the…

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2022

Robust Pressure Matching with ATF Perturbation Constraints for Sound Field Control

Junqing Zhang, Liming Shi, Mads Græsbøll Christensen, Wen Zhang, Lijun Zhang, Jingdong Chen
ICASSP 2022accepted

Sound field control systems deployed in room acoustic environments require knowing the acoustic channel impulse responses between the loudspeakers and matching microphones, which are challenging to estimate accurately due to perturbations caused by such factors as temperature changes and sensors’ po…

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2021

A Novel NMF-HMM Speech Enhancement Algorithm Based on Poisson Mixture Model

Yang Xiang, Liming Shi, Jesper Lisby Højvang, Morten Højfeldt Rasmussen, Mads Græsbøll Christensen
ICASSP 2021accepted

In this paper, we propose a novel non-negative matrix factorization (NMF) and hidden Markov model (NMF-HMM) based speech enhancement algorithm, which employs a Poisson mixture model (PMM). Compared to the previously proposed NMF-HMM method, the new algorithm, termed PMM-NMF-HMM, uses the Poisson mix…

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2020

A Fast Reduced-Rank Sound Zone Control Algorithm Using The Conjugate Gradient Method

Liming Shi, Taewoong Lee, Lijun Zhang, Jesper Kjær Nielsen, Mads Græsbøll Christensen
ICASSP 2020accepted

Sound zone control enables different users to enjoy different audio contents in the same acoustic environment. Generalized eigenvalue decomposition (GEVD)-based methods allow us to control the tradeoff between the acoustic contrast (AC) and signal distortion (SD). However, such methods have a high c…

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2018

Multipitch Estimation Using Block Sparse Bayesian Learning and Intra-Block Clustering

Liming Shi, Jesper Rindom Jensen, Jesper Kjær Nielsen, Mads Græsbøll Christensen
ICASSP 2018accepted

Pitch estimation is an important task in speech and audio analysis. In this paper, we present a multi-pitch estimation algorithm based on block sparse Bayesian learning and intra-block clustering for speech analysis. A statistical hierarchical model is formulated based on a pitch dictionary with a f…

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2017

Least 1-norm pole-zero modeling with sparse deconvolution for speech analysis

Liming Shi, Jesper Rindom Jensen, Mads Græsbøll Christensen
ICASSP 2017accepted

In this paper, we present a speech analysis method based on sparse pole-zero modeling of speech. Instead of using the all-pole model to approximate the speech production filter, a pole-zero model is used for the combined effect of the vocal tract; radiation at the lips and the glottal pulse shape. M…

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