TAK 1.0.2 - Beta release 1
Reply #32 – 2007-10-30 16:49:53
Thomas, 1.0.2b added to my comparison . This list contains 1.0.2 and 1.0.1 for comparison. You may find the 'download as CSV' functionality useful to get a clearer picture; here's my attempt: ... Thank you very much! Nice results... Some remarks:1.0.1b TAK Turbo 64.929% 104x 118x 1.0.2b TAK Turbo 65.281% 110x 129x I like this new very low complexity preset. The speed advantage over old TURBO isn't big but significant and the compression efficiency is still good.1.0.1b TAK Normal 63.875% 45x 109x 1.0.2b TAK Normal 64.093% 62x 113x You always told me, that you would like to see a faster NORMAL preset.... Normal is now using only 32 predictors which does make perfect sense, because 32 is the most bang-for-the-buck-condition (efficiency / complexity). I should have done this earlier, but there was some kind of a psychological barrier in my mind: Before the first publication of YALAC/TAK i have always focussed on strong compression and not on speed.1.0.1b TAK Extra Max 63.527% 7x 87x 1.0.2b TAK Insane Max 63.532% 10x 93x A nice encoding speed up for the guys who are always using TAK's strongest mode. It's surely worth the compression disadvantage of 0.005 percent. As you can see, i have also improved the decoding speed a bit. To summarize: I really like the new preset configuration.New preset p0 with 8 predictors results very interesting for transcoding scenario. It's faster for en/decoding and has higher compression than FLAC -5 ... -8 Is it possible to see even lower complexity turbo preset? This way it will have compression ratio like FLAC -8 and complexity of FLAC 0. The main goal will be very high decode speed for transcoding lossless to lossy. I could reduce the predictor count from 8 to 4. But this doesn't make much sense. First you will loose about 0.7 percent of compression. Second: The effect on the decoding speed will be hardly noticable. Going for 4 predictors would have only one real advantage: I could significantly increase the encoding speed. BTW: I am working on a new codec which -among other things- will decode a bit faster (currently about 6 percent for Turbo). Thomas