Takehiro some time ago (below) added or suggested he was adding this
option to LAME. Is it available? I mistakenly thought -q1 was
activating it as it is so much slower.
Cheers,
Ross.
Takehiro wrote:
I agree with -h n option.
So I list the some quality depending settings and some summury.
Any comment welcomed.
1 about Huffman code searching
I think mp3enc has 3 mode of huffman code searching.
(1) the aproximated best Huffman code.(older LAME code)
(2) after last loop run, perform a full huffman search(my new
code)
(3) huffman full search for every loops.
I test implemented (3) and it is "terribly" slow :). I think it
should
be enables only when the highest quality setting.
So I will add this in -h 0 :)
2 Analog threshold
LAME's main quantization loop continues even after "over==0", to
reduce
the max_noise or total_noise.
I think it is not needed for some circumstance. With some low
quality setting, we can remove this loop.
# I think this is what mp3enc calls "max outer loop"
3 subblock gain and scalefactor scale
see another my mail :)
including these items, quality setting will be like this.
*-h 0: full Huffman search for every loops.
*-h 1:
*-h 2: m/s masking thresholds
*-h 3:
*-h 4: more accurate quantization (quantize_xrpow)
*-h 5:
*-h 6: full Huffman search (best_huffman_divide)
*-h 7: scalefactor scale code
*-h 8: analog threshold
*-h 9: subblock gain code
---
Takehiro TOMINAGA // may the source be with you!
--
--
MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
