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Patent

Measuring method for assessing the quality of speech coders and/or transmission routes

TLDR
In this article, a comparison is carried out between the true meaning provided from a transmission memory and the meaning of a speech sample or a test signal recognized by the speech recogniser or speaker recogniser.
Abstract
In the measuring method according to the invention, speech samples and/or test signals, from which a speech recogniser or speaker recogniser has previously formed a reference pattern during a learning phase, are presented to this speech recogniser or speaker recogniser via a speech coder to be assessed or a transmission route to be tested Using an evaluation computer a comparison is carried out between the true meaning provided from a transmission memory and the meaning of a speech sample or a test signal recognised by the speech recogniser or speaker recogniser In this process, an error rate or a measure of the reliability of recognition is simultaneously calculated over a measurement cycle

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Patent

Method and apparatus for measuring voice path quality by means of speech recognition

TL;DR: In this article, a method for testing the voice path in a communication network by using speech recognition is proposed, which includes generating transmissible voice signals, preferably, computer generated voice signals which test predetermined voice path characteristics.
Patent

Method and apparatus for automatically and reproducibly rating the transmission quality of a speech transmission system

TL;DR: In this paper, a method for automatically and reproducibly rating the transmission quality of a speech transmission system is proposed, comprising the steps of generating a test signal containing a predetermined recorded voice signal, transmitting the test signal by the speech transmission systems from a transmitting end to a receiving end, extracting characteristic values from the received test signal, determining a differential pattern corresponding to the difference between the characteristic values and predetermined reference values, and feeding the differential pattern to a neural network that has been trained for classifying patterns according to a number of predetermined transmission quality classes.
Patent

Signal quality determining device and method

TL;DR: In this article, the authors proposed a combining circuit coupled to the two series circuits for determining the difference between two series circuit signals, and the scaling of the quality signal as a function of the series circuit signal.
Patent

Method of transmission quality estimation of a speech transmission link

TL;DR: In this article, a speech transmission link is used to evaluate the quality of the transmitted signal and the intermediate values are then evaluated by a neural network in such a way that an evaluation of "quality good, average or poor" understandable to humans is achieved at the output of the said network.
Patent

Device and method for signal quality determination

TL;DR: In this paper, the authors propose a combining circuit coupled to the two series circuits, whereby a scaling circuit is disposed between the two circuit for scaling at least one series circuit signal.
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