DCR tests measure how much processing degrades an audio signal

Evidence

A comparison is requested of listeners in a degradation category-rating (DCR) test, and this usually involves a comparison between a signal before and after some form of processing has been carried out. The assump­ tion here is that the processing is going to degrade the original signal in some way, for example after some sort of coding scheme such as MP3 (see Section 7.8) has been applied, where one would never expect the signal to be improved. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2372

Categorization

• DEFINE: Explains what a degradation category-rating (DCR) test is and its core assumption.
• XREF: connects to: DCR tests compare signals to their own degraded processed versions; Degradation mean opinion scores quantify how much processing has harmed a signal — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2394

Broader Connections

• DCR tests compare signals to their own degraded processed versions #expands (0.92)
• Degradation mean opinion scores quantify how much processing has harmed a signal #expands (0.88) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2394