A Constant Percentage Bandwidth Transform for Acoustic Signal Processing

Abstract

This paper describes a constant percentage bandwidth transform for acoustic signal processing. Such a transform is shown to emulate behavior found in the human auditory system. A synthesis transformation is developed which, when cascaded with the absence of spectral modification. The effects of spectral domain modification are described. Principles governing discrete implementation of the transform pair are discussed, and relationships are formalized which specify minimal sample requirements for the spectral domain. The Constant-Q spectral magnitude and phase functions are discussed, and three main methods are evaluated whereby the spectral phase may be unwrapped. Finally, the use of the transform pair is discussed in the solution of the perception-related problem of time scale compression and expansion of speech.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1980
Accession Number
ADA085666

Entities

People

  • James E. Youngberg

Organizations

  • University of Utah

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Signals
  • Algorithms
  • Computations
  • Ear
  • Fourier Analysis
  • Frequency
  • Frequency Domain
  • Integral Transforms
  • Integrals
  • Intelligibility
  • Modulation
  • Perception
  • Recognition
  • Signal Processing
  • Speech Compression
  • Time Domain
  • Weighting Functions

Fields of Study

  • Engineering

Readers

  • Approximation Theory.
  • Speech Processing/Speech Recognition.