Hi !!
<p> I am just now reading Vorbis I specifications .
I ahve some quries in that regading overlap add and sqaure polar mapping
.
I am writting this mail with the hope that ,some one will resolve my
quries.
<p> 1. After IMDCT , to remove the aliasing , we do overlap and add .
For
that the
window should have following properties ------------->
hk = h2n-1-k and
(hk* hk) + (hk+n * hk+n) = 1 . when 2n is the input block size
for MDCT in encoder .
THis is very imp requirement of overlap add in MDCT .
<p> What about overlap add in Vorbis ..? What type of winodw
criterias are
there ..? What is
the winodw function .?
<p> 2. I am very clear about how the aliasing goes in overlap add in
equal
sized winodw . But
I am not getting how it is canelled in large winodw following short
window ..?
Can any one tell me taht mathematically..?
<p> 3. In suare polar mapping how the spatial information is split in
point
and diffuse images ..?
<p><p> Thanks & regards
<p> Leena
<p><p><p><p>--- >8 ----
List archives: http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to
'vorbis-request@xiph.org'
containing only the word 'unsubscribe' in the body. No subject is
needed.
Unsubscribe messages sent to the list will be ignored/filtered.
