Hi there, I encoded the hard to encode piece ":wumpscut: - mother" with the new prebeta4 encoder (windows). As I crashed my harddrive I've to reinstall linsuxx again and double check the results, maybe there's a difference between the platforms (as far as I remember there was such a thing before). This song is pretty good for fast listening-tests as there are plenty of "percussion-only" sequences with many effects like reverb, echo,... and there are distorted "church organs" and strings that make it difficult for every encoder to get the job done right ;o) My results are: -b 100: 111 kbps. sound quality is inacceptable, sounds a little like an old tape to me -b 112: 104 kbps, sounds ok for the bitrate/full stereo -b 128: 124 kbps, sounds a little "flat" -b 160: 154 kbps, _much_ better, still a bit flat though -b 192: 175 kbps, sound quality is good. -b 256: 248 kbps, i can hear no improvement... -b 350: 308 kbps, as well no improvement of sound quality The quality seems to be better than in mp3, although it always sounds a little flat to me, I think the best description would be that the original (and mp3) have more "colours" (compared to <160 kbps vorbis). I was surprised that the 100kbps mode gave real bad quality at a higher real bitrate than the 112kbps-mode. This is the first mode that introduces a mp3-like "bubbling sound" that is not to ignore (112 kbps does this _a little_ as well at more silent passages). Modes higher than/equal to 128 kbps sound really fine. The encoder tripled in speed compared to beta3 on my duron 700. I'm still waiting for the channel-coupling to compare the results to other formats in a fair way :) I hope this helps you, regards and thanks for this good work, Dirk P.S.: if you want to verify my results there is still a ~7MB-piece of the first seconds of this song downloadable at http://roeder.goe.net/~koepi/hard_one_vorbis.zip (6.5MB) --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Just to clarify to all, the mode activated by -b 100 is Segher's mode_S (as
he said, the S isn't for Segher) which I added for my own testing, feel free
to compare, although it doesn't hit his intended target of 100kbps. Sorry if
this is confusing :-)
-Chris M.
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"Dirk Knop" <dknop@gwdg.de> wrote:> I'm still waiting for the channel-coupling to compare the results to other > formats in a fair way :)Monty, what about joint-stereo? There is no mention of it in this pre-beta4? Greetings, Aleksandar --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
> My results are: > > -b 100: 111 kbps. sound quality is inacceptable, sounds a little like an > old tape to me > -b 112: 104 kbps, sounds ok for the bitrate/full stereoThese should be the same mode... unless Segher's mode_S is compiled in, which it shouldn't be because it's broken. Are these the downloads Jack made?> -b 128: 124 kbps, sounds a little "flat"Yeah, the different modes are mainly the amount of 'bit depth' that gets encoded. Sort of like a false bottom to the audio, so the impression that some depth got removed is accurate. (More accurately, strong tones in beta 4 are usually encoded at full/near-full resolution, and 'noise' has the depth limited. The 100-110 kbps mode limits tone resolution too.)> The encoder tripled in speed compared to beta3 on my duron 700.Ahh, good to know.> I'm still waiting for the channel-coupling to compare the results to other > formats in a fair way :)I can't wait either, but this isn't something that I'm going to rush ;-) Thanks for taking the time to test it. Monty --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.