Hi everyone!
I use the commond "\mp4AudVm\win3\bin\debug>mp4auenc.exe -d 1 -m tf -r 48000 -c "-mp4ff -aac_sys_bsac" lovetree.wav -o lovetree_test3.fl4" to make a .fl4 file , in which I found something like a frame header "0x0101c0....5ec0" or "0x0102c0....5ec0"or "0x0103c0....5ec0",following which are 11bits length information just like the description of bsac payload in ISO 14496-3. But I found nothing about the header in front of the length information .
What's this?
Forgive my poor English and help me out ! Thanks in advance !
Full Version: What's the header?
QUOTE
What's the header?, in a file encoded by "-aac_sys_bsac"
My guess is that it would be command or a subroutine that activities MPEG-4 bit-sliced arithmetic coding. it's a very nifty "algorithm" to say the least. I guess you could compare to the hybrid "lossy" schemes used by wavpack, etc. It's more complex though in nature and from a technical standpoint. Here is a good definition
http://www.birds-eye.net/definition/b/bsac...ic_coding.shtml
[/quote]
My guess is that it would be command or a subroutine that activities MPEG-4 bit-sliced arithmetic coding. it's a very nifty "algorithm" to say the least. I guess you could compare to the hybrid "lossy" schemes used by wavpack, etc. It's more complex though in nature and from a technical standpoint. Here is a good definition
http://www.birds-eye.net/definition/b/bsac...ic_coding.shtml
Thank you very much !
What' your meaning is that I should focus on the sourse code ? It's really hard! =.=|||
I had read the reference information but I couldn't find the definition about those headers...should I tried to read some older standards just like 13818?
By the way ,what's the file type encoded by the switch "-aac_sys_bsac"?what's the difference between "-aac_sys_bsac" and "-aac_bsac"? and what's meaning of "-m tf "?
QUOTE(HotshotGG @ Jul 27 2006, 14:10) 
QUOTE
What's the header?, in a file encoded by "-aac_sys_bsac"
My guess is that it would be command or a subroutine that activities MPEG-4 bit-sliced arithmetic coding. it's a very nifty "algorithm" to say the least. I guess you could compare to the hybrid "lossy" schemes used by wavpack, etc. It's more complex though in nature and from a technical standpoint. Here is a good definition
http://www.birds-eye.net/definition/b/bsac...ic_coding.shtml
Thank you very much !
What' your meaning is that I should focus on the sourse code ? It's really hard! =.=|||
I had read the reference information but I couldn't find the definition about those headers...should I tried to read some older standards just like 13818?
By the way ,what's the file type encoded by the switch "-aac_sys_bsac"?what's the difference between "-aac_sys_bsac" and "-aac_bsac"? and what's meaning of "-m tf "?
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