Hello Jean-Marc,<br><br>Thank you for your quick answer! I agree with your suggestions, but I was thinking more about pre-filtering or pre-processing of the voice file, before it arrives to the speex encoder. I was wondering if there is some suggested optimization strategy to improve (at least a little) the perceived voice quality while lowering a bit the CBR.
<br><br>Thank you again for your attention,<br><br>Andrea<br><br><br><br><div><span class="gmail_quote">On 10/5/07, <b class="gmail_sendername">Jean-Marc Valin</b> <<a href="mailto:jean-marc.valin@usherbrooke.ca">jean-marc.valin@usherbrooke.ca
</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I guess you can always specify --quality 10, but you won't get 15 kbps
<br>quality at 11 kbps. Depending on the application though, VBR could be an<br>option.<br><br> Jean-Marc<br><br>Andrea wrote:<br>> I'm sorry if this message is slightly off topic, but I'd like to know an
<br>> opinion from the speech compression experts reading this list.<br>><br>> I'm using spheex to encode human voices at about 15kbps, with very good<br>> results. I was wondering if this is the best situation for my setup where I
<br>> have all the voice pre compressed (not in real time) by very powerful<br>> servers with (near) unlimited processing time and computational resources<br>> and a client relatively slow (ARM4 processor at about 70MHz). The encoding
<br>> phase time lenght is not important, I can let it run even for days if it<br>> helps compressing the output. The client decodes the data from a static<br>> file. My hope was to obtain something of the same quality I'm getting with
<br>> at 15kbps with a lower bitrate, using more computational time and power on<br>> the encoding phase. The audio source are very clean and very high quality.<br>><br>> Any hint?<br>><br>> Thank you in advance,
<br>><br>> Andrea<br>><br>><br>> P.S.<br>> Jean-Marc, I can never say thank you enough for this wonderful software<br>><br>><br>><br>> ------------------------------------------------------------------------
<br>><br>> _______________________________________________<br>> Speex-dev mailing list<br>> <a href="mailto:Speex-dev@xiph.org">Speex-dev@xiph.org</a><br>> <a href="http://lists.xiph.org/mailman/listinfo/speex-dev">
http://lists.xiph.org/mailman/listinfo/speex-dev</a><br></blockquote></div><br>