| 摘要 |
A device for determining the quality of an ouput signal to be generated by a signal processing circuit with respect to a reference signal is provided wit h a first series circuit for receiving the output signal and with a second series circuit for receiving the reference signal and generates an objective quality signal by means of a combining circuit coupled to the two series circuits. The poor correlation between said objective quality signal and a subjective quality signal to be assessed by human observers can be considerably improved by reducing, in a differential arrangement, present in the combining circuit, for determining the difference between the two series circuit signals, said difference by a certain value, preferably as a functio n of a series circuit signal, and the poor correlation can be further improved by disposing a scaling circuit between the two series circuits for scaling a t least one series circuit signal, it is furthermore also possible to scale th e quality signal as a function of said scaling arrangement.
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