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Discussion Groups | Audio Signal Processing
Technical discussions related to Audio Signal Processing (digital effects, acoustics, noise reduction, musical signal processing, etc).
Search Results for "aac"
MPEG 2/4 -AAC Decoder
UDAY Ammanagi - Mar 23 2006
Hi friends,
.. i ve just begun working on MPEG2-AAC Decoder and will be stepping
into MPEG4-AAC Decoder later on. so if there is anyone out there on a
similair task - g... 
MPEG-4 AAC+ CODEC Reference Software.
Ramya Desai - Dec 9 2003
Hai All,
Is there any reference code for MPEG-4 AAC+ Encoder
and decoder ?.
I came to know that even ISO has not released any
reference code for AAC+ (SBR). So is there any cha... help regarding aac lc encoder
sudeep hegde - Mar 11 2005
Hi All,
I have some doubts regarding quality issues in mpeg4
aac lc encoder.
1) does aac lc encoder gives tranparent quality at
96kbps or less for an audio of 48kHz stereo.
... help on AAC papers on AES
Ding, Ke - Jan 9 2006
Hi all
I'm new member in this group and currently doing the AAC LC encoder.
Since I am not a member of AES, could you share the following papers
with me if you have? Also I wa... help on AAC papers on AES
Ding, Ke - Jan 9 2006
Hi all
I\'m new member in this group and currently doing the AAC LC encoder.
Since I am not a member of AES, could you share the following papers
with me if you have? Also I w... aac doubt [2 Articles]
Abhishek Ballaney - Nov 28 2006
dear all,
am working on mpeg4 aac lc decoder.
how many sections can be there inside a group? this would help me in defining the array sizes.
regards,
abhi
/\ |_ |_ ' _... Regarding MPEG-4 HE-AAC conformance testing
gvgrao_spl - Nov 8 2005
Hi All,
I am presently working on MPEG-4 HE-AAC.
I faced problem with _twi(Twiddle)series,while i am doing the
conformance testing.
The vector is showing that its of AAC MAIN p... help for Parametric audio decoder [2 Articles]
snehal joshi - May 13 2005
Hi
I know that we can decode HE-AAC streams using AACLC
decoder only High freq generation will not be there.
Similarly can we decode Parametric stereo AAC stream
using only HE-... MPEG-2/4 AAC decoder! [2 Articles]
ajit gupta - Oct 9 2003
Hello All,
I need a favor. Can somebody tell me about the
companies who are having MPEG-2/4 AAC decoder and
among all of them who is having the best decoder?
If somebody has... MPEG-2 AAC File format
kinj...@gmail.com - Feb 14 2006
Hi everybody,
I am working on MPEG-2 AAC Encoder.
I want info regarding the file format for the MPEG-2 AAC file.
If someone is having related document, please send it to me.
tha... help needed regarding iso aac encoder
sudeep_mpeg - Jan 18 2005
hi,
i am developing aac iso encoder and have a little doubt
1)why the iso encoder uses libtsp.h libtsp.lib ect
2)is there any single workspace available for aac lc encoder si... Regarding HE-AAC
hari_bolneni - Sep 26 2005
Hi all,
Can any one know about the insight knowledge about HE-AAC.
How the low and high frequency compnents are related?
If any one having the documents regarding this please m... AAC psychoacoustic model
#ARIJIT BISWAS# - Nov 7 2007
Hi all!
Does anyone know how to translate the AAC psychoacoustic model scale-factor=
information to the masking curve?
http://en.wikipedia.org/wiki/Masking_threshold
In la... AAC LD bitstreams
Sameer Kibey - Feb 25 2004
hi all
I am looking for AAC "Low delay" (AAC_LD object type)
test bitstreams to test an AAC LD decoder.
Can anyone please suggest some links where these
bitstreams would be a... Psychoacoustics in MPEG-4 AAC. [6 Articles]
Ramya Desai - Jul 14 2003
Hi all,
A good day to all.
I want to know about psychoacoustic models in MPEG-4 AAC. If any of you know links to papers..please forward me. I will be thankful to you.
Regard... ADTS header format
brightjo_2000 - Feb 27 2005
Hi All,
I am new to AAC. While reading the MPEG4 AAC ADTS header
bitstream, the header gives the aac frame length as 0x0820 bytes in
decoder, but the maximum allowed inpu... MPEG-4 AAC LC Books [2 Articles]
ramya_desai - Jun 25 2003
Hai all,
I am new to this group. I have to work on MPEG-4 AAC LC coding.
May I know what books are available on this topic (Preferably
available in India). I will be thankful t... aac [2 Articles]
akash damodar sureka - Dec 12 2001
hi all,
i am working on advance audio coding project.
can anybody tell me what is 48.1 channels concept?
is it 48 different programs or 48 different channels,
... Fixed Point MPEG-4 AAC Implementation.
Ramya Desai - Dec 16 2003
Hi all,
I have some codes for MPEG-4 AAC implementation. But
they are floating point implementations.
Is there any fixed point code available for MPEG-4 AAC
for both encoder a... Mpeg 2 AAC fixed point code
"vinayhaveri.desai" - Jan 24 2008
Hi friends
Could anyone tell me where the Fixed point Mpeg2 AAC decoder c code is
available.
Thanks
Vinay
... AAC listening test [3 Articles]
Encai Liu - Jan 21 2002
Hi, All
I am working on advance audio coding project.
I was asked to implement the decoder using a Fixed-point DSP.
My question is how I test my Fixed-point AAC decoder and is ... AAC LC decoding query
Abhishek Ballaney - Mar 24 2007
Dear all,
I am working on Huffman decoding of AAC LC decoder. May I know what
should be the array sizes for storing the following information:
1. Section offset
2. Section c... (question) mpeg2 AAC encoder..TNS implementation
venkispl - Dec 13 2004
hi,
This is my first mail to this group
I am working on mpeg2 AAC encoder..
I need some help about implementation of Temporal noise shaping in
that...
I found many articles a... Conformance test vectors for AAC Decoder [3 Articles]
brightjo_2000 - Jan 17 2005
Hi All,
I need some help. Can anyone please send me a link to download
conformance test vectors for AAC decoder which pass through all the
modules in the decoder? I have... MPEG2 AAC Test Bitstreams
Sreejith Pattuvakkaran - Jan 31 2001
Hello,
I am working on MPEG2 AAC Decoder area.
I got AT&T Test bit streams for compliance testing. This is
16 bit PCM output test vectors.
I like to get 24 bit PCM test bitst... help regarding bitrates for aac lc encoder
sudeep_mpeg - Feb 23 2005
Hi all,
according to the standard the maximum bitrate a aac lc encoder should
work is
(6144/1024)* sampling frequency
i,e
sampling freq max bitrare
48000 28... Query on DeQuantization of MPEG-4 AAC Decoder [3 Articles]
Siddharth Nag - Apr 28 2005
Hi Folks!
Just needed some information on some of the schemes that
are used to implement DeQuantization of audio samples.
The scheme that I know is DeQuantization ... MPEG 2 AAC codec
RONAK BHALODIA - Jan 25 2006
Hi,
I want to know the working of bit alocation block in the AAC codec.
Currently its allocate the bits depending upon the SMR it got from the
phychoaucostic block. But we can a... Need Info. on MS coding in MPEG2 AAC
venu rao - Feb 1 2005
hi all,
I am working on MPEG2 AAC encoder M/S coding module.
I am in urgent need of the implementation and theory of M/S coding.
I have gone through the standard and the refe... how to play .aac with adif header in vlc or some other player
rgom...@sarayusoftech.com - Nov 22 2006
Hi all......
I badly want to know how to play .aac file with adif header.for the
same raw data with adts header most of the players like vlc,quick time
players play exactly w... MPEG-4 AAC LC decoder reference code!
ajit gupta - Nov 5 2003
Hello,
I need MPEG-4 AAC LC decoder reference code. Can
somebody tell me from where and how can I get this
one? I tried on ISO site, but not able to reach the
correct locatio... MPEG4 decoder testing [4 Articles]
Mohan Reddy - Jul 3 2007
Hi all
I am working on the MPEG4 AAC decoder . I have xxx.mp4 test vectors
but the decoder I have accepts only ADIF , ADTS formats.
So I am unable to do the testing, ca... MPEG4 AAC LC Decoder
deepa_r06 - Jun 14 2005
Hi All,
MPEG4 AAC Low Complexity Profile is the one i am working on. The
code is running on MSVC++. I am porting the code onto OMAP5912. There
are few memory related i... MPEG-2 AAC Low Delay (Windowing Technique)
myna...@gmail.com - Oct 24 2005
Hi all,
I am Mynampati Kuldeep Kumar. I am working on MPEG-2 AAC Low Delay Filter Bank. In this it has an algorithmic delay of 20 ms. The reason is as follows
A forward and In... Scale Factor bands used in AAC
Vivek Aggarwal - Jun 13 2004
Hello everyone,
can anybody give me a good reference or a link to understand basics
of the scalefactor bands used in the advanced audio coding.
Best Regards
Vivek
... MPEG4 AAC LC Decoder [3 Articles]
deepa_r06 - Jun 13 2005
Hi All,
I am in the process of porting the MPEG 4 to CCS(c55x). I am
facing problems with the wrapper code. Can anybody help me? The decoder
decodes only 2 frames. Is it... required fix-point 3/4 quantizer implementation
m venki - May 11 2005
Dear all,
I am working on MPEG2-AAC encoder. Please let me know how to implement the 3/4 quantizer in fixed point.
Thanks,
Venkatesh
... NMWT in MPEG4 AAC LTP profile
brightjo_2000 - Mar 21 2005
Hi All,
I would like to know whether non meaningful window_sequence
transition is allowed in LTP profile? If not why? Can anyone send
links regarding this material? Thanks i... (require info)..................
venu rao - Dec 28 2004
hi everyone,
i am venu,working on psycho acoustic modelling of AAC-LC.
plz anyone send me the reference documents.
bye
venu
... (I)MDCT implementation in AAC [2 Articles]
bojuchen2000 - Apr 7 2004
The implementation of the (I)MDCT includes pre-IFFT,IFFT and then
post-IFFT.
Who knows the related books or document describe that?
...