Hi. Is there any issue in this patch? On Sun, Jan 8, 2017 at 1:22 AM, Даниил Чередник <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 Даниил Чередник <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
