3 ms·
Opus is not low complexity
by 0-_-0 7y ago
Opus is not low complexity
- nwah1 7y agoFound this: LC3 at 32 kbps (LC3 32) provides significantly better audio quality than Opus-CELT at 32 kbps and complexity level 0 (OPUS_v114_c0 and COPUS_v114_c0). https://www.etsi.org/deliver/etsi_tr/103500_103599/103590/01.01.01_60/tr_103590v010101p.pdf https://www.etsi.org/deliver/etsi_tr/103500_103599/103590/01...
- throw0101a 7y agoI'm of the opinion that Codec 2 [0][1] should pause on trying to perform better at lower and lower bit rates, and put some work into higher ones. Getting down to 700 and even 450 b/s is neat and all, but there seems (to me) to be a gap between 4000 and 10000 b/s in the patent-free space. * [0] http://www.rowetel.com/?page_id=452 http://www.rowetel.com/?page_id=452 * [1] https://en.wikipedia.org/wiki/Codec_2 https://en.wikipedia.org/wiki/Codec_2
- rasz 7y agoopus_256k can decode in real time on ~40MHz arm9 from 1999, or 16MHz DSP core https://www.synopsys.com/dw/ipdir.php?ds=arc_audio_opus_codec https://www.synopsys.com/dw/ipdir.php?ds=arc_audio_opus_code...
- makomk 7y agoFor comparison, Synopsys' LC3 codec implementation: https://www.synopsys.com/dw/ipdir.php?ds=arc_lc3_codec https://www.synopsys.com/dw/ipdir.php?ds=arc_lc3_codec It doesn't seem to be a particularly lightweight codec compared to Opus, or particularly performant.