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<DIV><FONT face=Arial size=2>Andy,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Send me the wav file and I will try to help
you. Also, please send the encoded output from female.wav.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Have you looked at the output audio with a waveform
editor, to see if you can find the clicking?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Have you tried running the sample build in the C64x
simulator? That would give you a reference for file comparison. That
build is setup for Quality 3 (8kbps). I just ran the simulator build at
8kbps, and the output sounds fine. I have not tried 5950bps before, but I
just did, and I do not hear clicking. I will send you the simulator output
files off-list.</FONT></DIV>
<DIV> </DIV>
<DIV>By the way, the 16-bit char size that Jean-Marc refers to in the C5x, not
the C6x, so that is not an issue here. You could have a problem in your
sample handling, or maybe the bit handling, since 5950 does not produce an
integer number of bytes per frame (1 bit short of 15 bytes).</DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>- Jim</FONT></DIV></FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ndno72-speex@yahoo.com href="mailto:ndno72-speex@yahoo.com">Andy
Ngo</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=jean-marc.valin@usherbrooke.ca
href="mailto:jean-marc.valin@usherbrooke.ca">Jean-Marc Valin</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=speex-dev@xiph.org
href="mailto:speex-dev@xiph.org">speex-dev@xiph.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, January 23, 2007 1:16
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Speex-dev] Re: Clicking noise
using Speex built for TI C64+ DSP ofDaVinci Processor</DIV>
<DIV><BR></DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif">
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial,helvetica,sans-serif">Hi
Jean-Marc,<BR><BR>I have tested Speex in fixed-point mode on my PC without
clicking noise. As I mentioned below, I tested Speex in fixed-point
<BR>mode running natively on the ARM side of the DaVinci without click
noise. I only get the clicking noise when running Speex<BR>on the DSP
side. For the TI C64+ DSP on the DaVinci processor, the TI-specific
switches doesn't do much other than <BR>defining the different Speex data
types (spx_int16_t, spx_uint16_t, spx_int32_t, etc) and the static heap and
scratch size<BR>(in config.h and speex_types.h). How do I try "generic
fixed-point"; is there a MACRO for generic fixed-point like
<BR>"GENERIC_FIXED_POINT". I guess I could try to see if it's an encoder
issue (encode it on the DSP and decode it on the<BR>ARM side before playing)
vs a decoder issue (encode it on the ARM and decode it on the DSP before
playing). Any other<BR>suggestions?
Thanks.<BR><BR>Regards,<BR>Andy<BR><BR>
<DIV
style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman,new york,times,serif">-----
Original Message ----<BR>From: Jean-Marc Valin
<jean-marc.valin@usherbrooke.ca><BR>To: Andy Ngo
<ndno72-speex@yahoo.com><BR>Cc: speex-dev@xiph.org<BR>Sent: Tuesday,
January 23, 2007 2:57:34 AM<BR>Subject: Re: Clicking noise using Speex built
for TI C64+ DSP of DaVinci Processor<BR><BR>
<DIV>Can you test your code with fixed-point on an x86 and see if you
have<BR>the same problem. You can also try the generic fixed-point
without<BR>TI-specific switches. The main thing I see that *could* cause
problem is<BR>the 16-bit chars in the
bitpacker.<BR><BR> Jean-Marc<BR><BR>Andy Ngo a écrit
:<BR>> Hi,<BR>> <BR>> I've been trying to get Speex to
compile and run on the DSP of TI's new DaVinci System-On-Chip processor, which
has both an ARM<BR>> (ARM926) and a DSP (C64+, based on the
C6400). I used the latest code (1.2beta) and followed the example
in the speex-<BR>> 1.2beta1/ti/speex_C64_test trunk to build the Speex
library for the DSP. Basically I have a loopback application on the
ARM that<BR>> samples 8kHz 16-bit mono frames, gives them to the DSP to
encode and decode them, and play the resulting decoded frames on the<BR>>
headphone. It seems to work but I get a clicking
noise. I have verified that this is not due to an underrun problem
by doing the same<BR>> loopback bypassing Speex on the DSP side but added
delay that is 3ms longer that than that of Speex encode and decode
processing<BR>> times, and got smooth audio with no clicking
noise. Also, I fed the female.wav (posted on Speex site) through
the Speex encoder and<BR>> decoder on the DSP and got a resulting
decoded_female.wav that has a clicking noise; since I can't post the wav file
on this group, I <BR>> can send it to anyone who's interested in helping
me.<BR>> <BR>> Also, if I run the loopback application with
Speex natively on the ARM side (not using the DSP), it works
fine.<BR>> <BR>> I don't know where that clicking noise is
coming from. Any
advice/comments/suggestions?<BR>> <BR>> Here's what's
included in my config.h file for Speex (compiled with
-DCONFIG_TI_C6X):<BR>> <BR>> #define FIXED_POINT<BR>>
#define FRAME_SIZE 160<BR>> #define DISABLE_WIDEBAND<BR>> #define
MAX_CHARS_PER_FRAME (42/BYTES_PER_CHAR)<BR>> #define MANUAL_ALLOC<BR>>
#define USER_MISC<BR>> <BR>> Speex narrow band parameters I'm
using:<BR>> Quality: 2 /* 5950 bps
*/<BR>> Enhancement:
0<BR>> Vbr:
disabled<BR>> Complexity:
1<BR>> <BR>> The DaVinci processor is relatively new and I
can't seem to find anyone who has successfully used Speex on the DSP
side. Your help<BR>> is
appreciated. Thanks.<BR>> <BR>> Regards,<BR>>
Andy<BR></DIV></DIV><BR></DIV></DIV>
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