A 4.8 kbps code-excited linear predictive coder

A secure voice system STU-3 capable of providing end-to-end secure voice communications (1984) was developed. The terminal for the new system will be built around the standard LPC-10 voice processor algorithm. The performance of the present STU-3 processor is considered to be good, its response to nonspeech sounds such as whistles, coughs and impulse-like noises may not be completely acceptable. Speech in noisy environments also causes problems with the LPC-10 voice algorithm. In addition, there is always a demand for something better. It is hoped that LPC-10's 2.4 kbps voice performance will be complemented with a very high quality speech coder operating at a higher data rate. This new coder is one of a number of candidate algorithms being considered for an upgraded version of the STU-3 in late 1989. The problems of designing a code-excited linear predictive (CELP) coder to provide very high quality speech at a 4.8 kbps data rate that can be implemented on today's hardware are considered

Disabled children’s childhood studies: A distinct approach?

© 2014, © 2014 Taylor & Francis. This paper suggests that the emergence of disabled children’s childhood studies as an area of study offers a distinct approach to inquiry; it represents a significant shift away from the long-standing deficit discourses of disabled childhoods that have dominated western culture and its reaches. On the one hand, contemporary childhood studies contest normative, Eurocentric mantras around the ‘standard child’; while on the other, disability studies critique the medical discourses and the scope of its authority. However, while drawing on these two approaches, disabled children’s childhood studies provide more than this combined critique. In disabled children’s childhood studies, disabled children are not viewed as necessarily having problems or being problems, but as having childhoods