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Use of Auditory Temporal Masking in the MPEG Psychoacoustic Model 2
This paper presents a model of auditory temporal masking for perceptual audio coders. As such, we have developed a model to incorporate temporal masking effects into the MPEG psychoacoustic model 2. The enhanced psychoacoustic model renders more accurate masking thresholds. Since the masking thresholds are used in adaptive bit allocation, a better psychoacoustic model leads to higher audio quality at a fixed bit rate. Informal listening tests have shown that the incorporation of temporal masking into the MPEG-1 Layer 2 encoder results in a reduction of 5-14% in the average bit rate for transparent coding.
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