Time domain speech compression using the SDA (sample, discard, abut) procedure at compression ratios of 0.25 0.75 is studied by means of a new analog speech processor and minicomputer algorithms. Fourier transform methods have been used to establish correspondence between the quality of the reconstructed compressed speech waveforms and the subjective recognition of compressed speech. The result of two psychoacoustic experiments indicate that: 1. The interruption frequency should be equal to the pitch frequency of the voice waveform for the optimum recognition of the compressed speech. 2. Smoothing of the discontinuities with electronic techniques significantly improves the recognition of the compressed speech. The optimum smoothing parameters, window-width, and characteristic function are also obtained from this study.

Authors: Bennett, Ian M.; Linvill, J. G.
Affiliation: DEPARTMENT OF ELECTRICAL ENGINEERING, STANFORD UNIVERSITY, STANFORD, CA
AES Convention: 51 (May 1975) Paper Number: 1044
Publication Date: May 1, 1975 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=2388

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes8)   /pp6975/pp7505/1128.pdf

Start a discussion about this paper!