On Sun, Jan 15, 2017 at 6:58 PM, Paul B Mahol <one...@gmail.com> wrote:
> On 1/15/17, Daniil CHerednik <dan.chered...@gmail.com> wrote: > > Hi. > > Is there any issue in this patch? > > Do you plan to work more on this encoder? > Yes I do. > > Please do not top post. > Ok, sorry. > > > > > On Sun, Jan 8, 2017 at 1:22 AM, Daniil CHerednik < > dan.chered...@gmail.com> > > wrote: > > > >> With real music and 256k bitrate encoding (the source was 44100, 16bit > >> stereo) I got: > >> Without Huffman: Best PSNR is 31.77 for shift 0 > >> With: Best PSNR is 37.45 for shift 0 > >> > >> Current implementation of DCA encoder has minimal set of DTS features > (no > >> ADPCM, no VQ, fixed amount of transmitted subbands, no transient > control, > >> etc). So distortion is quite audible. Current set of patches introduces > >> Huffman encoding for quantized audio data which is equivalent of > >> increasing > >> bitrate for 10-20%. Also bitstream allows to use Huffman for scale > factor > >> indexes, and some other data. I am working on it too. > >> > >> I have attached new split set of patches. > >> > >> On Sat, Jan 7, 2017 at 11:50 PM, Carl Eugen Hoyos <ceffm...@gmail.com> > >> wrote: > >> > >>> 2017-01-07 20:39 GMT+01:00 Rostislav Pehlivanov <atomnu...@gmail.com>: > >>> > On 7 January 2017 at 16:11, Carl Eugen Hoyos <ceffm...@gmail.com> > >>> wrote: > >>> > > >>> >> 2017-01-07 16:00 GMT+01:00 Daniil CHerednik < > dan.chered...@gmail.com>: > >>> >> > >>> >> > Currently I am working on improvement quality of DTS encoder. > >>> Following > >>> >> > patches introduce Huffman coding. > >>> >> > >>> >> Is the quality improvement so obvious that no further tests are > >>> necessary? > >>> >> (Does psnr improve measurably?) > >>> >> > >>> > PSNR is pretty much useless for audio. > >>> > >>> > The ear's the only metric which works. > >>> > >>> Not everybody's;-)) > >>> > >>> > From the 2 samples he posted I can tell there's a big difference, and > >>> the > >>> > encoder isn't very good right now and the patch definitely helps. > >>> > >>> Thank you! > >>> > >>> Carl Eugen > >>> _______________________________________________ > >>> ffmpeg-devel mailing list > >>> ffmpeg-devel@ffmpeg.org > >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > >>> > >> > >> > >> > >> -- > >> Daniil Cherednik > >> > > > > > > > > -- > > Daniil Cherednik > > _______________________________________________ > > ffmpeg-devel mailing list > > ffmpeg-devel@ffmpeg.org > > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > -- Daniil Cherednik _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
