The use of data reduction codecs and sound processors in broadcast dosn`t allow traditional quality measurement methods such as THD, signal to noise ratio. In order to find an efficient and cost effective quality evaluation method, Radio France`s Value Department experimented a tool called Tocade Audio Monitor (from CCETT research center). This device indicates the sound quality of a signal without any reference. It was tested with a CD that gives an image of Radio France programs (music, speech, location reports...). This CD test was used as a reference. All kind of signal paths were simulated using actual sound processors and data rate reduction codecs encountered at Radio France.
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