Hi Jesper,
Interesting samples! It seems to do OK on what I would call "clean
speech" - e.g. the female starting at 1:02, and male at 1:30, but
struggles with the people shouting, or samples that were recorded from
microphones far away from the speaker (room acoustics). I had trouble
understanding some of the source samples.
I'm sorry but I don't think there is much we can do with pre-processing
to improve the quality. To get the very low bit rates we make certain
assumptions about the input speech, e.g. the people speaking close to
the microphone.
Cheers,
David
On 17/12/20 10:24 pm, Jesper Norberg wrote:
Hi everyone!
I'm working on a project where I want to add a digital radio feel to
military voice lines. I found codec2 and really like the sound in the
examples, but I'm having trouble reproducing the same audio quality.
Some of it sounds good, but especially when the voice line gets more
agitated it starts breaking apart. Appending an audio sample to show
what I mean, this is a 8khz 16 bit mono sample with a codec2 bitrate
of 3200, which from what I understand should be the highest quality.
The sample is first women then men, both with examples in descending
intensity.
I'm a bit new at this, is there any preprocessing/settings that I
could apply in order to improve the quality?
Original
https://drive.google.com/file/d/1IWyV_CwK0KYXC0_ZN3t3QJNk9UCwTOp9/view?usp=sharing
codec2 - 3200
https://drive.google.com/file/d/1Ww1QsNUw8s5TLQXQnBln4CkgpmjUuVFS/view?usp=sharing
Best regards
Jesper
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