[Mp4-tech][Mpeg4 AAC] regarding scale factor bands in AAC

[Vinayaka Hegde]

Hai Shreya,
My understanding is that,
sfb is scalefactor band means: group of consecutive spectral values. 
swb is scalefactor window bands means: group of scalefactor bands in a
single window
for this you can refer section 4.5.2.3.4
max_sfb - gives the maximum number of scalefactor bands in the frame.
g is used for the loop count and it represents num_window_groups.
num_window_groups is 1 for long windows and for short windows it is
calculated from scale_factor_grouping information (part of ics_info()).
This calculation is also given in the above mentioned section 
Vinayaka
-----Original Message-----
From: Shreya Pathak [mailto:shreya_pathak rediffmail.com]
Sent: Monday, July 19, 2023 5:10 PM
To: mp4-tech lists.mpegif.org
Cc: VHarisha soc-soft.com
Subject: [Mp4-tech][Mpeg4 AAC] regarding scale factor bands in AAC
Hi,
I wanted to know more about scale factor bands in AAC.The description given
in standard is a bit confusing.I want to know about
sfb,swb,g,max_sfb,num_window_groups.
Regards
Shreya
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