There are no firm guidelines for filtering of the input.
- David
On 18/6/21 5:49 pm, fin7...@gmail.com wrote:
Thanks.
How about filtering; should input audio be bandpass filtered or is
there a built-in filtering in codec? If pre-filtering is required,
what are the requirements for that?
t. matti
On Fri, Jun 18, 2021 at 10:54 AM David Rowe <da...@rowetel.com
<mailto:da...@rowetel.com>> wrote:
Hi,
It should be 16 bit shorts, mono, 8 kHz sample rate.
- David
On 18/6/21 3:17 pm, fin7...@gmail.com <mailto:fin7...@gmail.com>
wrote:
Hi,
I’m trying to investigate if Codec2 could be used in a software
project, where a low bit rate speech coding is required. I have
built the codec using the instructions from Github and with
included reference audio files I can get similar audio quality
what can be heard on Codec2 web page. However, if I try coding &
decoding with some other recordings, the voice quality is
unacceptable poor, even in case where there is no background
noise at all.
This makes me think that I have something wrong with my input
audio file format. What are the actual requirements for raw file
to get best possible performance? Sample rate, encoding etc?
At this stage I am using Audacity to convert the audio for testing.
Thanks, and keep up the good work!
t. Matti
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