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Can I use ARM9 processor for mpeg 4 decoding?

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solvall_ex1

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mpeg 4 decoding

picture resolution 160x240. frame rate 15 frames/s,

Can I use ARM9 processor to do purely s/w mepg 4 decoding ?
it is possible to run 15f/s ?
 

solvall

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Re: mpeg 4 decoding

I heard of one thing that it's hard to play MPEG4 by s/w based decoding.
ARM9 is not that powerful.
 

jasongou

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Re: mpeg 4 decoding

yes, i am sure arm9 which can work at 400MHz has that power.I
I ever make a arm9 platform that can play picture resolution 320x240,frame rate 20frame/s
 

swahlah

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Re: mpeg 4 decoding

400 MHz is a huge power ... we are doing Half-D1 30 fps 352x240 H264 encoding and full D-1 Decoding at 300 MHZ processor by Philips

so i think 400 MHz can do a bit more
For this u have to do lots of optimizations
-We can discuss it in details if u want to proceed
 

solvall_ex1

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Re: mpeg 4 decoding

swahlah said:
400 MHz is a huge power ... we are doing Half-D1 30 fps 352x240 H264 encoding and full D-1 Decoding at 300 MHZ processor by Philips

so i think 400 MHz can do a bit more
For this u have to do lots of optimizations
-We can discuss it in details if u want to proceed
I would like to start s/w based MPEG4 and H264 codecs.But don't know
How to make s/w codecs run efficiently.
Would you help me something about this coding.
Thank you
 

swahlah

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Re: mpeg 4 decoding

solvall_ex1,
Your question is very simple but the answer is too lengthy and tough .....
it took me two years to achieve this performance of H264 Codec on Philips DSPs...
But i think now it's not that tough for me.... So i can give u some suggestions in this context that will show u sudden improvement......

The main thing in Video Applications is the memory access .... so u have to reduce the memory access.. reduce cache misses... both data cache and instruction cache..... for this u have to redesign the whole data flow of the software..... change memories from multi-dimension to one-dimensional arrays....

second major thing is then the core loop optimizations using special instruction set of the processor targetted..........

this is just at abstract level.... but if u really wanna do it then u can contact me on my email or yahoo messenger.... my email is
swahlah@yahoo.com

add me on messenger using login name
swahlah

-see u there because here it willl be too tedious for me to communicate freely... as this problem requires lots of conversations

-Best Regards
Shafique
 

eziggurat

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Re: mpeg 4 decoding

Could you tell me what ARM processor from Phillips? I am thinking of starting a open source hardware project that will require RTOS and able to send video and voice across the network. I am not very sure if the MPEG4 in the ARM is a viable option for me. I am also considering using MPEG4 chips but unsure of the cost involve.

Do you have any suggestion or tips?
 

jasongou

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Re: mpeg 4 decoding

hi, i want to make a project about encoding real time video,resolution 800x600,25frames. i would like to select h.264 data flow. who can give me some suggestions about scheme? i selected TI dm642 DSP which can operate on 720MHz.
 

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