Info needed mpeg2 TS demux

Started by Pradeep SN in Audio Signal Processing17 years ago

Hi, Can any one help me out in finding free public domain C source code for MPEG-2 Transport Stream (TS) depacketization/Demultiplexer...

Hi, Can any one help me out in finding free public domain C source code for MPEG-2 Transport Stream (TS) depacketization/Demultiplexer ? Thnaks in advance Pradeep


MPEG4 AAC LC Decoder

Started by deepa_r06 in Audio Signal Processing15 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


need scalefactor info in MPEG-1audio layer 2

Started by Vandanapu, Naveen in Audio Signal Processing16 years ago

All,  In MPEG-1 audio, there is

All,  In MPEG-1 audio, there is


??,?: ??,?: a MPEG2 question

Started by ZiP HE in Audio Signal Processing20 years ago

Hi, rsv, Thank you for your information, I have got the equation from MATLAB11. I still have some problems in my MPEG DSP solution, which is...

Hi, rsv, Thank you for your information, I have got the equation from MATLAB11. I still have some problems in my MPEG DSP solution, which is the subband filter cooefficient C(i), can you or anyone else tell me any equation to get those factors? A look-up table seems not only huge but hard to keep the precision. regards! ZiP -----????----- ???: Prasad R S V [mailto:rsv@rsv@...] ??


MPEG 2/4 -AAC Decoder

Started by UDAY Ammanagi in Audio Signal Processing15 years ago

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...

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 - get in touch with me on my corporate id - u...@chipwerks.com ..looking forward for a fruitful professional association ..!!!! Regards, -UDAY


Query on DeQuantization of MPEG-4 AAC Decoder

Started by Siddharth Nag in Audio Signal Processing15 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


Mpeg 2 AAC fixed point code

Started by "vinayhaveri.desai" in Audio Signal Processing13 years ago

Hi friends Could anyone tell me where the Fixed point Mpeg2 AAC decoder c code is available. Thanks Vinay

Hi friends Could anyone tell me where the Fixed point Mpeg2 AAC decoder c code is available. Thanks Vinay


a MPEG2 question

Started by ZiP HE in Audio Signal Processing20 years ago

Dear all, I am a newcomer in DSP, and now working on MPEG-2 Audio Encoder. In ISO11172-3 encoding algorithms(Layer II and Layer III), before...

Dear all, I am a newcomer in DSP, and now working on MPEG-2 Audio Encoder. In ISO11172-3 encoding algorithms(Layer II and Layer III), before FFT transfer, there are 1152 samples collected, but only 1024 points FFT are employed, what shall we do with the remaining 128 samples, just ingnored or shall overlapped by Module Reduction N? Before FFT an Hanning window is firstly applied. Best R


Regarding MP3 frame format

Started by kiran kumar in Audio Signal Processing15 years ago

hello , i am doing my project in mpeg-1 audio layer-3 audio decoder using arm7. iam facing problem in understanding the bitfield...

hello , i am doing my project in mpeg-1 audio layer-3 audio decoder using arm7. iam facing problem in understanding the bitfield information of sideinformation in mp3 frame format. plz help in understanding. thanking you, yours s...


Regarding MDCT

Started by myna...@gmail.com in Audio Signal Processing15 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


MPEG 2 AAC codec

Started by RONAK BHALODIA in Audio Signal Processing15 years ago

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...

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 also use the perceptual error as one of the criteria to allocate the bits optimally. In this case we can improve the quality of audio at the same bitrate.I am working on it and changing the C code for that. SO can anyb


Low Delay Filter bank

Started by myna...@gmail.com in Audio Signal Processing15 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


filter bank : design n application

Started by Sanjay S in Audio Signal Processing16 years ago 1 reply

I'm currently doing my major project on Non-uniform filter bank theory and application. I need your help and suggestions based the design of a...

I'm currently doing my major project on Non-uniform filter bank theory and application. I need your help and suggestions based the design of a non-uniform cosine-modulated filter bank (a 27 or 32 channel filter bank)and find it's application in the existing MPEG-1, Layer-III model ~ "MP3" audio codec, thereby replacing the hybrid filter bank which is employed in the existing one.