Sean Dunlevy wrote:
>
> Anyone know the MIPS usage of an MP audio stream? I downloaded a DOS
> compressor/decompressor and it was a total beast of a program. That
> psycho-acoustic model stuff is really wild...
Expect on the ARM7 architecture a full 48K 128Kbps Layer3 stream to require
close to 30MHZ..
Obviously pretty useless for the GBA's underpowered CPU..
So just to give you a hint :) 16K mono MP3 takes just over 5MHZ of power.
The power required for other variations of bitstream and sample rates, scale
in a fairly linear fashion.
AndyM
Hi, I remember reading an e-mail about image compression on the gba. I will share the alternatives I found regarding image compression. I just discovered the...
Vince VE
vince_0x0f@...
Oct 2, 2000 10:26 pm
On Mon, 2 Oct 2000, Vince VE wrote: <snip> ... Well, if you're looking for a technical challenge, at http://www.ffd2.com/fridge/chacking/c=hacking19.txt you'll...
Anders M Montonen
ammonton@...
Oct 3, 2000 12:07 pm
In message <Pine.OSF.4.20.0010031456570.2147-100000@...> ... Hm, since this is a gba mailing list, i assume you are talking about the gameboy...
Dennis Ranke
exoticorn@...
Oct 3, 2000 1:02 pm
... Oops. I had a serious eye-brain-disconnection, and thought the mail was from the gb-dev list. Of course the GBA can use JPEGs! Sorry everyone, my bad. -a...
Anders M Montonen
ammonton@...
Oct 3, 2000 1:12 pm
... Go for the AAN DCT.. Using that I'm currently at 0.31 MegaPixels per second (about 8fps) using 8:1 compressed images. That's still in a complete C++ ...
Andy Mucho
andy@...
Oct 3, 2000 1:31 pm
In message <EHEOLOLLINEMBNHDJDFLOEDDHEAA.andy@...> ... Yes, that's what i will try to implement today. Thanks to you i now also have some...
Dennis Ranke
exoticorn@...
Oct 3, 2000 1:49 pm
In message <EHEOLOLLINEMBNHDJDFLOEDDHEAA.andy@...> ... Hmm, I have now implemented AAN DCT and my decoder now takes on a 233Mhz StrongARM...
Dennis Ranke
exoticorn@...
Oct 3, 2000 8:44 pm
... Nope, I meant the entire kaboodle. Though my file format is not a true JPEG compliant stream, I still feature all the essentials, but no dithering. I keep...
Andy Mucho
andy@...
Oct 3, 2000 10:11 pm
In message <EHEOLOLLINEMBNHDJDFLEEFKHEAA.andy@...> ... Hm, that's impressive. That means that i have still some things to do... ... Hm, in...
Dennis Ranke
exoticorn@...
Oct 4, 2000 3:45 pm
... why 'impractical for real use' ? more like 'the most decent image compression out there' ... (yes, it works like a charm on c64 ;=P) -- ... /^\ \ / ASCII...
Groepaz
groepaz@...
Oct 3, 2000 12:11 pm
Anyone know the MIPS usage of an MP audio stream? I downloaded a DOS compressor/decompressor and it was a total beast of a program. That psycho-acoustic model...
Sean Dunlevy
sean@...
Oct 3, 2000 1:36 pm
... Expect on the ARM7 architecture a full 48K 128Kbps Layer3 stream to require close to 30MHZ.. Obviously pretty useless for the GBA's underpowered CPU.. So...
Andy Mucho
andy@...
Oct 3, 2000 2:15 pm
Useful to know. So, it should be possible to squeeze a low-rate stream out of the thing. I suppose 32KHz is fine considering the DAC & op-amp isn't likely to ...
Sean Dunlevy
sean@...
Oct 3, 2000 2:20 pm
Why use any alternatives to the compression built into the hardware? I would think those would be the fastest to decompress. Doesn't the hardware support...
Joshua Meeds
dreamer@...
Oct 4, 2000 12:15 am
Hi, No you are quite correct. In fact I store my images using LZ77 compression but no Huffman so that you can decompress straight into VRAM. If you use ...
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