On Pitch-Synchronous Abridgment of the Linear Prediction Residual.

Abstract

We developed an approach to abridging the short-term LPC residual and used the abridged information to generate speech at 9.6 to 16 kilobits per second (kb/s). This is an alternative to the baseband residual-excited coder now being used in NRL's Multirate Processor (MRP). The abridgment logic requires less than one multiply per input sample, is independent of voiced/unvoiced decisions, restricts the influence of errors to a single frame, strongly resists brief input anomalies, and provides anchor periods of excellent speech reproduction once per frame. This approach appears promising for practical application in real-time systems where simplicity, stability, and quality are important. It scores somewhat lower overall on the Diagnostic Rhyme Test than the more complicated MRP approach. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 12, 1982
Accession Number
ADA111862

Entities

People

  • N. D. Smith

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Amplitude
  • Boundaries
  • Coders
  • Coding
  • Communication Systems
  • Detectors
  • Distortion
  • Frequency
  • Frequency Domain
  • Frequency Shift
  • Military Research
  • Narrowband
  • Regression Analysis
  • Speech Compression
  • Voice Communications
  • Waveforms

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Speech Processing/Speech Recognition.
  • Theoretical Analysis.