MPEG-4 AAC LC Books

Started by ramya_desai in Audio Signal Processing16 years ago 1 reply

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...

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 to you. Regards, RD


Psychoacoustics in MPEG-4 AAC.

Started by Ramya Desai in Audio Signal Processing16 years ago 5 replies

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....

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. Regards, Ramya.


MPEG-4 AAC LC decoder reference code!

Started by ajit gupta in Audio Signal Processing16 years ago

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...

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 location. Thanks in advance. Regards, Ajit __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.


MPEG-4 multichannel audio test bit-streams

Started by #ARIJIT BISWAS# in Audio Signal Processing15 years ago 2 replies

Dear List: Any idea where I can locate MPEG-4 Multichannel Audio test bit-streams? Regards, ~Arijit

Dear List: Any idea where I can locate MPEG-4 Multichannel Audio test bit-streams? Regards, ~Arijit


MPEG-4 AAC+ CODEC Reference Software.

Started by Ramya Desai in Audio Signal Processing15 years ago

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...

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 chance to get a reference code for AAC+ ???? Thanks in Advance, Regards, Ramya.


Fixed Point MPEG-4 AAC Implementation.

Started by Ramya Desai in Audio Signal Processing15 years ago

Hi all, I have some codes for MPEG-4 AAC implementation. But they are floating point implementations. Is there any fixed point code available...

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 and decoder ?. If any of you have that code..plz forward to me. or send me the link to download. Regards, Ramya. __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGua


MPEG-4 BSAC Documentation & Free source implementation

Started by Ramya Desai in Audio Signal Processing15 years ago

Hi all, I want to work on MPEG-4 BSAC. I searched the web for documentation, but what I got was very little. Is there any source of...

Hi all, I want to work on MPEG-4 BSAC. I searched the web for documentation, but what I got was very little. Is there any source of documentation for BSAC along with free source implementation ?. Thanks In Advance, Best Regards, Ramya. __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard


Query on DeQuantization of MPEG-4 AAC Decoder

Started by Siddharth Nag in Audio Signal Processing14 years ago 2 replies

Hi Folks! Just needed some information on some of the schemes that are used to implement DeQuantization of audio samples. The...

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 using a look-up table of 8192 by storing the value of y^(4/3) in the table and using y as the index to access these values. Is it possible to eliminate the Look-up table totally without much computational


MPEG4 AAC LC Decoder

Started by deepa_r06 in Audio Signal Processing14 years ago 2 replies

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...

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 because of cmd file? Thanx in adv, Deepa


Low Delay Filter bank

Started by myna...@gmail.com in Audio Signal Processing14 years ago

Hi all, I am Mynampati Kuldeep.I am doing a thesis on Low Delay Filter Banks. In MPEG-4 ER AAC, due algorithmic procedure a delay of 20 ms...

Hi all, I am Mynampati Kuldeep.I am doing a thesis on Low Delay Filter Banks. In MPEG-4 ER AAC, due algorithmic procedure a delay of 20 ms is present.So,this delay is to be further reduced modiying Filter banks.I would like to ask you to suggest me some Information ,or web sites or some articles regarding this. Thanking you, bye... mynampati kuldeep kumar


Regarding MPEG-4 HE-AAC conformance testing

Started by gvgrao_spl in Audio Signal Processing14 years ago

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...

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 profile.But my decoder supports only AAC LC profile. So,is it necessary to test my decoder with _twi vectors? And also which series of vectors are sufficient to test Sbr part. If any one knows about this please mail


Regarding MDCT

Started by myna...@gmail.com in Audio Signal Processing13 years ago

Hi all, I would like to ask you regarding MDCT specially ,as we know MDCT is DCT (type-4) with 50% overlap on consective block applied in...

Hi all, I would like to ask you regarding MDCT specially ,as we know MDCT is DCT (type-4) with 50% overlap on consective block applied in MPEG-4 AAC low delay.I could not get proper understanding how it works internally. Example: MDCT =[ DCT(type-4)* TDAC * Window ] Cosider for example we have MDCT of 2n inputs and n outputs and this n output is equal to DCT (type-4) i