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Transcoding to higher bitrates
Master_Scythe 
22/7/08 10:23:36 PM
Titan

CALM DOWN! I know transcoding is the devil, so i dont need to hear about it.

However, in my thinking this evening, I came up with a theory based entirely on logic.

If i start with say, a
160kbps MP3

and i edit it in any program (as such its been uncompressed into tmp files for the editing)
If i save as an MP3 again, it recompresses, and would lose additional data.

However, what if i saved to a higher bitrate?

Lets use generaisations for a sec so i dont have to actually look up numbers on this :P

Say 160kbps cuts at 17khz and above.
and 192kbps cuts at 18khz and above.

If I edit a 160kbps MP3
(thusly it fills out the rest of the data as best it can 'oversampling' etc, however it gets it back to a wav file for editing)
And i save back to a 160kbps MP3, clearly it cuts more data from the already disfigured waveform uncompressing created.

However what if i saved at 192kbps?

I have up to 17khz of audio, and this only cuts above 18khz.

I know there are MORE algorithms and compression techniques happening there, but Im just assuming they're LESS agressive the higher bitrate you go to, yes? as you dont need to cut\compress as much (you're allowing more bitrate)


OK feel free to rip my theory to threads, but it was just a train of thought I had this evening.

Even if im wrong, which i suspect i will be, does my above method at least MINIMISE transcoding damage?

-----
4200+X2 939, ASUS A8N-SLI-D, Ati HD3850, 1gb,1tb total HDD, 109 DVD, LG DVD-rom.
Quote by Girvo
I've got a wicked tiny one that is ridiculously sensitive.



-80 
23/7/08 12:57:49 AM
Banned

It's folly.
It does more than just high cut.

Just use wav and stop trying to make a silk purse from a sow's ear.

-----
Mercury - you've got my number

Master_Scythe 
25/7/08 12:06:45 AM
Titan

huh? im not 'trying' to do anything.

It was just a train of thought i had, so :P

-----
4200+X2 939, ASUS A8N-SLI-D, Ati HD3850, 1gb,1tb total HDD, 109 DVD, LG DVD-rom.
Quote by Girvo
I've got a wicked tiny one that is ridiculously sensitive.



-80 
25/7/08 7:23:42 AM
Banned

What's the point then?

-----
Mercury - you've got my number

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