TY - JOUR ID - 89415 TI - Speech Enhancement using Greedy Dictionary Learning and Sparse Recovery JO - Journal of Information Technology Management JA - JITM LA - en SN - AU - Srinivas, K. N. H. AU - Santhi Prabha, I. AU - Venugopala Rao, M. AD - Research Scholar, ECE Department, JNTUK, Kakinada, India. AD - Professor, ECE Department, JNTUK, Kakinada, India. AD - Professor, ECE Department, K. L. University, Guntur, India. Y1 - 2023 PY - 2023 VL - 15 IS - Special Issue SP - 120 EP - 132 KW - Sparse representation KW - Greedy Dictionary Learning KW - Singular Value Decomposition KW - Orthogonal Matching Pursuit KW - Quantization DO - 10.22059/jitm.2022.89415 N2 - Most real-time speech signals are frequently disrupted by noise such as traffic, babbling, and background noises, among other things. The goal of speech denoising is to extract the clean speech signal from as many distorted components as possible. For speech denoising, many researchers worked on sparse representation and dictionary learning algorithms. These algorithms, however, have many disadvantages, including being overcomplete, computationally expensive, and susceptible to orthogonality restrictions, as well as a lack of arithmetic precision due to the usage of double-precision. We propose a greedy technique for dictionary learning with sparse representation to overcome these concerns. In this technique, the input signal's singular value decomposition is used to exploit orthogonality, and here the ℓ1-ℓ2 norm is employed to obtain sparsity to learn the dictionary. It improves dictionary learning by overcoming the orthogonality constraint, the three-sigma rule-based number of iterations, and the overcomplete nature. And this technique has resulted in improved performance as well as reduced computing complexity. With a bit-precision of Q7 fixed-point arithmetic, this approach is also used in resource-constrained embedded systems, and the performance is considerably better than other algorithms. The greedy approach outperforms the other two in terms of SNR, Short-Time Objective Intelligibility, and computing time. UR - https://jitm.ut.ac.ir/article_89415.html L1 - https://jitm.ut.ac.ir/article_89415_6d2dc09927e1f845bbd5ef65eadaebd2.pdf ER -