U.S. Philips Corporation

Dieter Mergel

Hermann Ney

Peter Hansen

Detlef Raasch

Horst H Tomaschewski

The invention relates to a magneto-optical recording medium having a magneto-optical layer which is composed of a quaternary alloy of Nd.sub.x Tb.sub.y Fe.sub.z Co.sub.m, the quantitative proportions of the alloying elements x, y, z and m being selected as follows:

Magneto-optical recording medium

In a method of and an arrangment for determining the start-point and end-point of a word signal in a speech signal consisting of isolated utterances, three adjacent windows are determined at each new digital value for the last arrived stored digital values, in which the central window contains the actual word signal. The length of this central window is varied for each digital value between a minimum and a maximum value, and a threshold value is determined from the two adjacent windows and is subtracted from the energy contained in the central window. Thus, the method and the apparatus always takes the overall speech signal into account instead of individual isolated portions so that a reliable end-point determination then is possible.

Growing community of inventors

Hamburg, Germany

Dieter Mergel