Signal quality determining device and method
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United States of America Patent
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May 16, 2000
Grant Date -
N/A
app pub date -
Sep 5, 1997
filing date -
Mar 15, 1995
priority date (Note) -
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Abstract
A device for determining the quality of an output signal to be generated by a signal processing circuit with respect to a reference signal is provided with a first series circuit for receiving the output signal and with a second series circuit for receiving the reference signal. The device generates an objective quality signal by means of a combining circuit coupled to the two series circuits. Poor correlation between the objective quality signal and a subjective quality signal, to be assessed by human observers, can be considerably improved by disposing a scaling circuit between the two series circuits for scaling at least one series circuit signal. Furthermore, it is also possible to scale the quality signal as a function of the scaling circuit. Poor correlation can be further improved by determining, using a differential arrangement present in the combining circuit, a difference between the two series circuit signals, and then modifying the difference by a certain value, preferably as a function of a series circuit signal
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