Hi, all,
The reply from Lyra:
The codec has been trained on thousands of hours of speech in more than 70
languages and tested on many different speakers and accents. It relies only on
log-mel spectrograms per frame and no long-term speaker id. For some audio
samples you can check out our blog or generate them yourself using
encoder_main and decoder_main.
------------------ Original ------------------
From:
"freetel-codec2"
<da...@rowetel.com>;
Date: Thu, Apr 15, 2021 05:36 AM
To: "freetel-codec2"<freetel-codec2@lists.sourceforge.net>;
Subject: Re: [Freetel-codec2] Codec2 vs Lyra?
Al,
My understanding ii that Lyra is currenlty optimised for arm64
systems. Like LPCNet, it may still need a port of several key
functions to some sort of x86 SIMD instruction set like AVX.
- David
On 9/4/21 8:34 pm, Al Beard via Freetel-codec2 wrote:
Hi all,
I've loaded this "bazel" build system on Ubuntu 20.04 LTS on a
Pentium E5300 box (no AVX/AVX2).
apt install bazel-4.0.0; ln -s
/usr/bin/bazel-4.0.0 /usr/bin/bazel
bazel build -c opt :encoder_main
bazel build -c opt :decoder_main
I note the audio samplerate is 16000 whereas Codec2 and the
M17 project go with 8000.
Running their test script:
:
export PATH=$PATH:/data/downloads/yy4418/lyra/bazel-bin
bazel-bin/encoder_main --model_path=wavegru
--output_dir=$HOME/temp
--input_path=testdata/16khz_sample_000001.wav
bazel-bin/decoder_main --model_path=wavegru
--output_dir=$HOME/temp/
--encoded_path=$HOME/temp/16khz_sample_000001.lyra
output
I20210409 20:36:27.839759 178277
decoder_main_lib.cc:97] Elapsed seconds : 9
I20210409 20:36:27.839819 178277
decoder_main_lib.cc:98] Samples per second : 12246.8
time aplay
$HOME/temp/16khz_sample_000001_decoded.wav
Playing WAVE
'/root/temp/16khz_sample_000001_decoded.wav' : Signed 16 bit
Little Endian, Rate 16000 Hz, Mono
real 0m8.481s
user 0m0.195s
sys 0m0.071s
============ So from an 8.5 sec test file, when decoded
takes:
real 0m11.183s
user 0m11.050s
sys 0m0.105s
W20210409 20:43:22.203222 178355
kernels_generic.h:241] SumVectors: using generic kernel!
I20210409 20:43:32.897627 178355
decoder_main_lib.cc:97] Elapsed seconds : 10
I20210409 20:43:32.897687 178355
decoder_main_lib.cc:98] Samples per second : 11307.7
====== Conclusion =====
My Pentium E5300 2.6 GHz is not powerful enough!
The encode phase is quick, super quick:
time encoder_main --model_path=wavegru
--output_dir=$HOME/temp
--input_path=testdata/16khz_sample_000001.wav
WARNING: Logging before InitGoogleLogging() is written
to STDERR
I20210409 20:57:47.317165 178410
encoder_main_lib.cc:94] Elapsed seconds : 0
I20210409 20:57:47.317334 178410
encoder_main_lib.cc:95] Samples per second : 5.12104e+06
real 0m0.049s
user 0m0.034s
sys 0m0.012s
Alan VK2ZIW
On Thu, 8 Apr 2021 14:34:12 +0800, Random wrote
> Thanks a lot, David.
>
> Could you please squeeze Lyra to 2400bps ? Such that we
can compare its performance with that of LPCNet.
>
> Best Regards.
>
> ------------------ ÔʼÓʼþ
------------------
>
> ·¢¼þÈË: "freetel-codec2" <da...@rowetel.com>;
> ·¢ËÍʱ¼ä: 2021Äê4ÔÂ7ÈÕ(ÐÇÆÚÈý) ÏÂÎç4:25
> ÊÕ¼þÈË:
"freetel-codec2"<freetel-codec2@lists.sourceforge.net>;
>
> Ö÷Ìâ: Re: [Freetel-codec2] Codec2 vs Lyra?
>
> Hmm, I wonder how quickly I can get this into a FreeDV
mode :-)
>
> 3000 bit/s is a bit high for HF, but nice for VHF. Might
be cool for
> the m17 project.
>
> On 7/4/21 5:18 pm, David Rowe wrote:
> > Further to this, I've just bee told Google has open
source Lyra :-)
> >
> >
https://opensource.googleblog.com/2021/04/lyra-enabling-voice-calls-for-next-billion-users.html
> >
> >
> > - David
> >
> >
> > _______________________________________________
> > Freetel-codec2 mailing list
> > Freetel-codec2@lists.sourceforge.net
> >
https://lists.sourceforge.net/lists/listinfo/freetel-codec2
>
> _______________________________________________
> Freetel-codec2 mailing list
> Freetel-codec2@lists.sourceforge.net
>
https://lists.sourceforge.net/lists/listinfo/freetel-codec2
---------------------------------------------------
Alan VK2ZIW
Before the Big Bang, God, Sela.
OpenWebMail 2.53, nothing in the cloud.
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