Hello Usman,
Can you pls tell us a little more about your project?
Some general comments:
1) If that chip is not available you could use any method you like to
get 5V, like another switcher chip or just a 5V lab supply.
2) If you don't intend to use USB OTG you might not need this.
3) Just for EMI, you can get away without it for a one off project.
4) Just use any 5V to 3V3 low drop out regulator.
I can't suggest any pin-pin replacements, but f you can locate some
candidates (and supply data sheets) we may be able to comment.
- David
On 29/12/20 3:28 pm, Muhammad Usman Akbar wrote:
I am Muhammad Usman Akbar from Pakistan and a student of Telecom
engineering final year from islamia University of Bahawalpur.
I am taking about the following IC's.
1. TPS54329E used in the power circuit (12-15 VDC -> 5 VDC
2. STMPS2141 used in OTG USB interface
3. EMIF02-USB03F2 also used in OTG USB interface
4. LD3985M33R used in 5V to 3.3 V PS.
On Mon, Dec 28, 2020, 11:49 PM David Rowe <[email protected]
<mailto:[email protected]>> wrote:
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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