Improved Speech-Presence Uncertainty Estimation Based on Spectral Gradient for Global Soft Decision-Based Speech Enhancement
- Authors
- Kim, Jong-Woong; Chang, Joon-Hyuk; Nam, Sang Won; Kim, Dong Kook; Shin, Jong Won
- Issue Date
- Oct-2013
- Publisher
- IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
- Keywords
- global soft decision; speech-presence uncertainty; spectral gradient
- Citation
- IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, v.E96A, no.10, pp.2025 - 2028
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES
- Volume
- E96A
- Number
- 10
- Start Page
- 2025
- End Page
- 2028
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/26630
- DOI
- 10.1587/transfun.E96.A.2025
- ISSN
- 0916-8508
- Abstract
- In this paper, we propose a speech-presence uncertainty estimation to improve the global soft decision-based speech enhancement technique by using the spectral gradient scheme. The conventional soft decision-based speech enhancement technique uses a fixed ratio (Q) of the a priori speech-presence and speech-absence probabilities to derive the speech-absence probability (SAP). However, we attempt to adaptively change Q according to the spectral gradient between the current and past frames as well as the status of the voice activity in the previous two frames. As a result, the distinct values of Q to each frequency in each frame are assigned in order to improve the performance of the SAP by tracking the robust a priori information of the speech-presence in time.
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