### Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: Energy partition (Read 2789 times)
0 Members and 1 Guest are viewing this topic.

## Energy partition

##### 2004-01-12 16:19:54
Hi,

have some doubt here. For psychoacoustic model-2. There is one table that have "whigh" and "wlow" in ISO11172-3 (table D.3b) (sampling freq=44100Hz).

I use that table to construct the energy partition. Total index=b=57

The function is as follow:-

eb=sum from 'w=wlowb' to 'whighb' (rw^2)

Ofcourse my total eb will have total 57 reading since b=57.

However, for long block pre-echo control :-

thr(b)=MAX(qthr(b),nbb(b),nbb_l(b),nbb_ll(b))

Where,
nbb(b)=eb(b)*sprdngf*norm(b)*10
nbb_l(b) = 2*nbb(b)
nbb_ll(b) = 16*nbb(b)

The problem here is qthr(b) in tablec.7.b total have index=b=63, meaning there are total 63 of qthr(b) values in the (tableC.7.b) but I only have 57 of Nbb(b) values. So can I only compare from 1 to 57 values for every block of data? Please