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Speech compresses really well, with modern techniques you can get it down a lot. The big issue with analogue landline phone calls is the audio bandwidth is so
by Synaesthesia 2y ago
Speech compresses really well, with modern techniques you can get it down a lot.
The big issue with analogue landline phone calls is the audio bandwidth is so limited. It's not the full frequency spectrum, most of it it cut off.
- cosmotic 2y agoFor some context, wikipedia has a good table and diagram of codecs that do well at low bitrates, many of which are very old (G.722 from the late 1988, Speex from 2003, Opus from 2012 for a few examples) https://en.wikipedia.org/wiki/Comparison_of_audio_coding_formats https://en.wikipedia.org/wiki/Comparison_of_audio_coding_for... https://en.wikipedia.org/wiki/Opus_(audio_format)#Quality_comparison_and_low-latency_performance https://en.wikipedia.org/wiki/Opus_(audio_format)#Quality_co...
- numpad0 2y agoI have no problems with Opus or mp3 at low bitrate, in the same way I have no problems with microwaved food. I just think it's crazy that no one is doing 4Mbps audio while we're routinely streaming 20Mbps video as cheap distractions.
- piperswe 2y ago4Mbps audio doesn't really make sense when you can just about perfectly replicate any human-audible sound in ~1.4Mbps EDIT: I do agree that lossless (or at least high bitrate modern lossy, like 256k Opus which is basically transparent) should be available in many more situations though.