There is no scale factor band 21 (sfb21) for frequencies above approx 16 kHz, forcing the encoder to choose between less accurate representation in band 21 or less efficient storage in all bands below band 21, the latter resulting in wasted bitrate in VBR encoding. COUNT 4
QSN1 What can scale factor band 21 be shortened to? ANS1 sfb21 QSN2 What is the maximum frequency that scale factor band 21 can go up to? ANS2 16 kHz QSN3 The encoder has to choose between less acurate representation in band 21 or which factor in all bands below band 21? ANS3 less efficient storage QSN4 What does less efficient storage result in for VBR encoding? ANS4 wasted bitrate