Hello Usman,
1/ Can you please send us a link that explains your project, who you
are, and your University Department? We are happy assist with student
projects but need to be sure they are not defense related.
2/ Also pls ask a specific question - such as "can I substitute this
part number (data sheet link) for SM1000 component XYZ". You will have
to do your homework first - working out which parts you need t substitute.
- David
On 28/12/20 6:03 pm, Muhammad Usman Akbar wrote:
Hi, Everyone
I am final year student and want to design a same SM1000 hardware.
I am working on a hardware design of SM1000.
I am following the version F available online on GitHub Rowetel.
I face some problems in selecting components because components used
in SM1000 previously not available in my country (Pakistan). Or some
of the components not clearly find on internet.
Anyone here who guide me to found alternate components or the same.
Your reply is highly appreciated.
Thanks in advance.
Regards:
Usman
On Fri, Dec 18, 2020, 4:17 AM David Rowe <[email protected]
<mailto:[email protected]>> wrote:
Hi Jesper,
I think if you use clean samples - ie person speaking close to the
mic (but not clipped), you might be able to make it a bit better.
Increasing the bit rate is a major job - but you could try other
open source codecs like Opus.
- David
On 18/12/20 8:39 am, Jesper Norberg wrote:
Hi David,
So, these samples I picked up from drill sergeants on youtube,
the ones I use in the end will be cleaner.
Ideally I would like to get at least some amount of agitation in
the voice to work, it does seem like a very plausible scenario if
we're talking soldier communication potentially mid-combat.
I'm going to experiment a bit to see if I can figure out a
mastering chain that filters out what confuses the algorithm.
Do you think it's possible to improve the results by increasing
the bitrate? If so, how would you suggest I approach it? Is it
sufficient to expand on the 3200 algorithm or would the
assumptions you mentioned also need to be changed?
Best regards
Jesper
On Thu, Dec 17, 2020 at 8:18 PM David Rowe <[email protected]
<mailto:[email protected]>> wrote:
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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