- 14 May, 2013 1 commit
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Claudio Freire authored
Signed-off-by: Martin Storsjö <martin@martin.st>
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- 04 May, 2013 2 commits
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Claudio Freire authored
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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Diego Biurrun authored
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- 03 May, 2013 1 commit
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Diego Biurrun authored
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- 23 Mar, 2013 1 commit
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Bojan Zivkovic authored
Signed-off-by: Bojan Zivkovic <bojan@mips.com> Reviewed-by: Nedeljko Babic <Nedeljko.Babic@imgtec.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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- 07 Mar, 2013 1 commit
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Bojan Zivkovic authored
This patch changes existing mathematical functions with faster ones. Speeds up encoding more than 10%. Tested on x86 and MIPS platforms. Signed-off-by: Bojan Zivkovic <bojan@mips.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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- 20 Dec, 2012 1 commit
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Diego Biurrun authored
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- 14 Sep, 2012 2 commits
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Michael Niedermayer authored
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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Michael Niedermayer authored
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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- 09 Sep, 2012 1 commit
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Michael Niedermayer authored
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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- 29 Jul, 2012 1 commit
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Michael Niedermayer authored
Improves subjective quality Formula and testing by: kamedo2 <fujisakihir90@yahoo.co.jp> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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- 26 May, 2012 1 commit
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Michael Niedermayer authored
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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- 28 Mar, 2012 1 commit
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Diego Biurrun authored
Also remove one pointless zero initialization in rangecoder.c.
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- 23 Jan, 2012 4 commits
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Nathan Caldwell authored
Signed-off-by: Alex Converse <alex.converse@gmail.com>
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Nathan Caldwell authored
Signed-off-by: Alex Converse <alex.converse@gmail.com>
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Nathan Caldwell authored
Signed-off-by: Alex Converse <alex.converse@gmail.com>
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Nathan Caldwell authored
Also fix a typo. Signed-off-by: Alex Converse <alex.converse@gmail.com>
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- 12 Dec, 2011 1 commit
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Diego Biurrun authored
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- 29 Jun, 2011 3 commits
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Nathan Caldwell authored
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Nathan Caldwell authored
aacenc: Implement dummy channel group analysis that just calls the single channel analysis for each channel.
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Nathan Caldwell authored
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- 25 Jun, 2011 1 commit
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Diego Biurrun authored
It is intentionally left in to allow adding 3GPP-style windowing in the future. Marking it av_unused silences an annoying unused function warning.
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- 23 Apr, 2011 2 commits
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Nathan Caldwell authored
Signed-off-by: Martin Storsjö <martin@martin.st>
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Nathan Caldwell authored
There is still are still a few sections missing relating to TNS (not present) and mid/side (contains other bugs). Overall this improves quality, and vastly improves rate-control. Signed-off-by: Martin Storsjö <martin@martin.st>
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- 19 Mar, 2011 1 commit
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Mans Rullgard authored
Signed-off-by: Mans Rullgard <mans@mansr.com>
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- 18 Mar, 2011 1 commit
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Nathan Caldwell authored
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- 17 Mar, 2011 2 commits
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Nathan Caldwell authored
Correct bad indentation in aaccoder Clarify and correct comments in 3GPP psymodel, other cosmetics.
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Nathan Caldwell authored
3GPP: Remove ffac from and move min_snr out of AacPsyBand. Rearrange AacPsyCoeffs to make it easier to implement energy spreading. Rename the band[] array to bands[] Copy energies and thresholds at the end of analysis. LAME: Use a loop instead of an if chain in LAME windowing.
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- 01 Nov, 2010 2 commits
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Nathan Caldwell authored
The 3GPP spec uses the following calculation for high spreading: thr'_spr = max(thr_scaled, s_h(n) * thr_scaled(n-1)) where, n is defined as the current band, and s_h() is defined as "[...] the distance of adjacent bands in Bark and a constant slope that is 15 dB/Bark [...]". This is a little ambiguous as you would assume you want the Bark width of the previous band for this calculation. However, this assumption appears to be incorrect, and you really want the Bark width of the current band. Coincidentally this is exactly what the spec calls for! =P This noticeably improves Tom's Diner at low bitrates (I tested at 64kbps, with mid/side disabled). Patch by: Nathan Caldwell <saintdev@gmail.com> Originally committed as revision 25622 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Nathan Caldwell authored
Patch by: Nathan Caldwell <saintdev@gmail.com> Originally committed as revision 25621 to svn://svn.ffmpeg.org/ffmpeg/trunk
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- 27 Oct, 2010 3 commits
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Nathan Caldwell authored
This greatly improves bitrate handling. You will now get within a few kbps of your requested bitrate instead of 20-40kbps higher. There is absolutely no analog to this line in the 3GPP spec, that I can find. patch by Nathan Caldwell saintdev (at) gmail Originally committed as revision 25589 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Nathan Caldwell authored
Removing the modification vastly improves quality (at a slight bitrate cost) for some samples. castanets.wav is a good example. The closest equivalent I see to the modification in the 3GPP spec is a similar modification (over a specific frequency range) when TNS is used. This also changes the threshold-in-quiet calculation to match the 3GPP spec. patch by Nathan Caldwell saintdev (at) gmail Originally committed as revision 25588 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Nathan Caldwell authored
According to the 3GPP spec: "Thus the pre-echo control is inactive for the first short window (but not all short windows in a short frame) after a start block and for all frames with a stop window sequence." Currently, pre-echo control is only run when the current frame is not a short frame, and the previous frame is not a short frame. patch by Nathan Caldwell saintdev (at) gmail Originally committed as revision 25587 to svn://svn.ffmpeg.org/ffmpeg/trunk
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- 25 Oct, 2010 1 commit
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Nathan Caldwell authored
I used the same loop counter for the inner and outer initalization loops. This caused initalization to only run for the first channel. This in turn lead to any channel other than the first using only short blocks. Patch by Nathan Caldwell, saintdev at gmail Originally committed as revision 25566 to svn://svn.ffmpeg.org/ffmpeg/trunk
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- 30 Aug, 2010 1 commit
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Alex Converse authored
Originally committed as revision 24999 to svn://svn.ffmpeg.org/ffmpeg/trunk
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- 23 Aug, 2010 2 commits
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Nathan Caldwell authored
This performs quite a bit better than the current 3GPP-inspired window decision on all the samples I have tested. On the castanets.wav sample it performs very similar to iTunes window selection, and seems to perform better than Nero. On fatboy.wav, it seems to perform at least as good as iTunes, if not better. Nero performs horribly on this sample. Patch by: Nathan Caldwell <saintdev@gmail.com> Originally committed as revision 24892 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Nathan Caldwell authored
This allows cleaner implementation of other psymodels using the existing structs. It also will make it easier to interchange individual parts of the psymodel to create hybrid models. Patch by: Nathan Caldwell <saintdev@gmail.com> Originally committed as revision 24890 to svn://svn.ffmpeg.org/ffmpeg/trunk
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- 14 Jul, 2010 3 commits
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Alex Converse authored
Originally committed as revision 24233 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Alex Converse authored
Originally committed as revision 24232 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Alex Converse authored
Fix the MDCT line to frequency calculation for the first line in each sfb. Use this value to calculate ATH. Originally committed as revision 24231 to svn://svn.ffmpeg.org/ffmpeg/trunk
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