MPEG-2 layer-3 multichannel decoder

Started by pai_raviin in Audio Signal Processing14 years ago

Hi, I am trying to implement the MPEG-2 layer-3 multichannel decoder, backward compatible with MPEG-1 layer-3. I am new to this work and I...

Hi, I am trying to implement the MPEG-2 layer-3 multichannel decoder, backward compatible with MPEG-1 layer-3. I am new to this work and I don't have any source code to implement this decoder, but I got spec 13818-3. Actually I am trying to build this multichannel decoder around the MPEG- 1 layer-3 and its low sampling frequency (lsf) stereo decoders like MPEG2, MPEG2.5. Main aim of th


MPEG-2 AAC File format

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

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...

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. thank you. Have a nice day. Bye.


Fixed Point MPEG-4 AAC Implementation.

Started by Ramya Desai in Audio Signal Processing16 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


[Wanted] MPEG Audio Layer II Source Code

Started by m_0_0_m in Audio Signal Processing18 years ago

Hi~ all I would like to implement MPEG Audio Layer II Decoder on 16 bit fixed point DSP. (specifically on OAK/TeakLite DSP Board) The MPEG...

Hi~ all I would like to implement MPEG Audio Layer II Decoder on 16 bit fixed point DSP. (specifically on OAK/TeakLite DSP Board) The MPEG Audio Layer II decoder would be used at the DAB (EUREKA-147) receiver How can I get the source code of MPEG Audio Layer II Decoder in 16 bit fixed point version? I have to simulate the code on DSP board and check the performance ASSP??T_T ?? Other


[Wanted] MPEG-2 Audio Source Code

Started by m_0_0_m in Audio Signal Processing18 years ago 1 reply

Hi~ all I would like to implement MPEG Audio Layer II Decoder on 16 bit fixed point DSP. I've found the floating point C source code...

Hi~ all I would like to implement MPEG Audio Layer II Decoder on 16 bit fixed point DSP. I've found the floating point C source code (dist.10) from univ. Hannover. But, It seems that it is not the final revision. (The encoder doesn't output the correct bitstream, maybe...) How can I get the final version of MPEG audio source code? Thanks in advance?? Min-seok


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.


[Q]MPEG Audio decoder's quality....

Started by Park, Sam-Yook in Audio Signal Processing19 years ago 1 reply

Hi. What's the main factor to make different MPEG Audio decoder's quality? (Especially, for MPEG-1 audio) I had...

Hi. What's the main factor to make different MPEG Audio decoder's quality? (Especially, for MPEG-1 audio) I had read about the benchmark of mpeg audio decoder's quality, bot I can't find it again now..


MPEG Psychoacoustic Model -2

Started by #ARIJIT BISWAS# in Audio Signal Processing13 years ago 1 reply

Dear List: I want to do some fast experiments with the MPEG Psychoacoustic Model - 2. Is there any source from where I can download the...

Dear List: I want to do some fast experiments with the MPEG Psychoacoustic Model - 2. Is there any source from where I can download the routines? I just need a simple program, where I give the input audio signal, and I get the masking threshold out. Any help in this regard will be highly appreciated, and also acknowledged. Best Regards, ~Arijit


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


MPEG-2/4 AAC decoder!

Started by ajit gupta in Audio Signal Processing16 years ago 1 reply

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...

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 already worked on AAC, may he/she share his/her experience about its performance, complexity, memory requirment, cycle count, no of channels supported by it for different profiles and some other related stuff which I


About Psychoacoustic Entropy (PE) for MPEG-2 AAC (For Block switching)

Started by palav_patel87 in Audio Signal Processing8 years ago

Hello, I am working on MPEG-2 AAC. I would like to know that how to decide value for Psychoacoustic entropy (PE) for block switching.I...

Hello, I am working on MPEG-2 AAC. I would like to know that how to decide value for Psychoacoustic entropy (PE) for block switching.I have ISO_13818-7_AAC stander but they do not clarify the value for PE for switching from long block to short block.Please if any one have idea about it, please help me............Thanks in advance. RegardsPallav Patel


MPEG-4 AAC+ CODEC Reference Software.

Started by Ramya Desai in Audio Signal Processing16 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.


MPEG-4 multichannel audio test bit-streams

Started by #ARIJIT BISWAS# in Audio Signal Processing16 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 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 BSAC Documentation & Free source implementation

Started by Ramya Desai in Audio Signal Processing16 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


Mp3-joint stereo

Started by gbmk_2004 in Audio Signal Processing14 years ago 1 reply

Hi , Can any body helpme in the following . 1. In one Mp3 file, both stereo and joint stereo modes are possible or not? i.e. some frames...

Hi , Can any body helpme in the following . 1. In one Mp3 file, both stereo and joint stereo modes are possible or not? i.e. some frames encoded as stereo and some frames as joint stereo. 2. is it same for both MPEG-1, MPEG-2 layerIII? Thanks Mallikarjun


MPEG-2 AAC Low Delay (Windowing Technique)

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

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...

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 Inverse MDCT with N Frequency bands introduces a delay of 2*N-1 samples. By decomposing the MDCT into Windowing /TDAC and DCT (Type-4) it can be observed that DCT-4 generates N-1 Sample delay and Windowing/TDAC generate


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


mpeg-filter bank concepts ????

Started by sathi bhonsle in Audio Signal Processing16 years ago

hi all,   can anyone suggest me about any good site/ material about filter bank concept in mpeg audio and its details.   ...

hi all,   can anyone suggest me about any good site/ material about filter bank concept in mpeg audio and its details.   thank u    


MP3 pointers

Started by Syed Moinuddin in Audio Signal Processing19 years ago

Hi all,             There are two sites where you can find info about MP3 offical site:-> www.cselt.it/mpeg/ ...

Hi all,             There are two sites where you can find info about MP3 offical site:-> www.cselt.it/mpeg/