Adapted Bases of Time-Frequency Local Cosines

✍ Scribed by Lars F Villemoes

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 254 KB
• Volume: 10
• Category: Article
• ISSN: 1063-5203
• DOI: 10.1006/acha.2000.0335

✦ Synopsis

We develop and analyze a best basis algorithm for orthonormal bases of local cosines which satisfy a uniform bound on their time-frequency concentration. All waveforms are obtained from three elementary window functions by shifts, rescaling, and modulation. For a discrete signal of length N, the complexity is of order N(log N) 2 .