Designing optimal prototype filters for maximally decimated Cosine Modulated filter banks with rapid convergence

• Published in: Heliyon Vol. 10; no. 11; p. e31912
• Main Authors: Keerthana, B., Raju, N., CV, Ravikumar, Anbazhagan, Rajesh, Kim, Tai-hoon, Mohammad, Faruq
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 15.06.2024; Elsevier
• Subjects: Cosine-modulated filter bank (CMFB); Least-square technique; Near perfect reconstruction; Prototype filter; Sub-band coding; Near perfect reconstruction; Sub-band coding; Cosine-modulated filter bank (CMFB); Least-square technique; Prototype filter

An analytic design of a prototype filter for M-channel maximally decimated cosine-modulated Near Perfect Reconstruction (NPR) filter banks is proposed in this work. The prototype filter is created using the least-square (CLS) method with weighted constraints, which is one-dimensional and requires si...