New window-switching criterion of audio compression
Hou Zhaorong, Dou Weibei, Dong Zaiwang · 2002
The ERIC (energy ramp in critical-band) criterion for window switching in perceptual audio coding is proposed. This new criterion can effectively distinguish real burst signals from stationary signals with high perceptual entropy. Therefore, comparing with the perceptual entropy criterion used in the MPEG standard, the possibility of misjudgment of the window types is reduced. It results in some improvements on both the audio quality and the coding efficiency.