<div dir="ltr">On Fri, Mar 22, 2013 at 8:42 AM, Fernando Alberto Marengo Rodriguez <span dir="ltr"><<a href="mailto:fmarengorodriguez@yahoo.com.ar" target="_blank">fmarengorodriguez@yahoo.com.ar</a>></span> wrote:<br>
<div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div style="font-size:14pt;font-family:'times new roman','new york',times,serif">
<div><span>Dear Benjamin,</span></div><div class="im"><div style="font-style:normal;font-size:18.6667px;background-color:transparent;font-family:'times new roman','new york',times,serif"><span><br></span></div>
<div style="font-style:normal;font-size:18.6667px;background-color:transparent;font-family:'times new roman','new york',times,serif"><span>> </span>What is your
motivation for constructing this hardware? Is your goal to learn/teach
from the experience, or are you trying to build something that you
cannot buy?</div><div style="font-style:normal;font-size:18.6667px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div></div><div style="font-size:18.6667px;font-family:'times new roman','new york',times,serif;background-color:transparent;font-style:normal">
<span style="color:rgb(0,0,255)">Yes, I am interested in learning how Ogg Vorbis works, and what its performance is in audio players in comparison with MP3 and AAC players. It is said that Ogg encoded files have higher quality than MP3 encoded files. It would be interested to verify that in hardware, not just in audio player software.</span></div>
</div></div></blockquote><div><br></div><div style>I don't quite see why this is interesting. A correctly functioning Ogg Vorbis decoder, whether made of silicon or C or javascript, will produce the same output from the same file. I suppose that "correctly functioning" and "the same output" are subtle concepts, so it could be interesting to verify the correctness of different implementation.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div style="font-size:14pt;font-family:'times new roman','new york',times,serif">
<div style="font-size:18.6667px;font-family:'times new roman','new york',times,serif;background-color:transparent;font-style:normal"><span style="color:rgb(0,0,255)">We have been investigating about Flac, but for the time being we know little about Ogg Vorbis. <span style="font-weight:bold">Could you please tell me which Ogg audio player hardware is available in the market?</span></span></div>
</div></div></blockquote><div><br></div><div style>"player hardware" is a very difficult concept. Every Android phone is an Ogg Vorbis audio player; to most users that qualifies as "Ogg audio player hardware". However, it sounds like you are interested in lower-cost, lower-power solutions. We maintained a list of low-power Vorbis decoders at <a href="http://wiki.xiph.org/Vorbis_Hardware">http://wiki.xiph.org/Vorbis_Hardware</a> . Calling these "hardware decoders" is problematic. There is a spectrum from firmware running on general-purpose CPUs, to DSPs (perhaps with some Vorbis-specific additions), to complete silicon decoder logic with a microcontroller CPU for dispatch. From the manufacturer-supplied documentation, it is not always possible to tell where on this spectrum each product stands.</div>
<div style><br></div><div style>--Ben</div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div><div style="font-size:14pt;font-family:'times new roman','new york',times,serif"><div style="font-size:18.6667px;font-family:'times new roman','new york',times,serif;background-color:transparent;font-style:normal">
<span style="color:rgb(0,0,255)"><br></span></div><div class="im"><div style="font-style:normal;font-size:18.6667px;background-color:transparent;font-family:'times new roman','new york',times,serif"><br></div>
<div>Thank you very much and best regards, <br></div><div>Fernando<br><br></div> </div><div style="font-family:'times new roman','new york',times,serif;font-size:14pt"><div class=""> </div><div style="font-family:'times new roman','new york',times,serif;font-size:12pt">
<div class=""> </div><div dir="ltr"><div class=""> </div><font face="Arial"><div class=""> <hr size="1"> <b><span style="font-weight:bold">De:</span></b> Benjamin Schwartz <<a href="mailto:benjamin.m.schwartz@gmail.com" target="_blank">benjamin.m.schwartz@gmail.com</a>><br>
<b><span style="font-weight:bold">Para:</span></b> Fernando Alberto Marengo Rodriguez <<a href="mailto:fmarengorodriguez@yahoo.com.ar" target="_blank">fmarengorodriguez@yahoo.com.ar</a>> <br><b><span style="font-weight:bold">CC:</span></b> Monty Montgomery <<a href="mailto:monty@xiph.org" target="_blank">monty@xiph.org</a>>; Silvia Pfeiffer <<a href="mailto:silvia@silvia-pfeiffer.de" target="_blank">silvia@silvia-pfeiffer.de</a>>; "<a href="mailto:ogg-dev@xiph.org" target="_blank">ogg-dev@xiph.org</a>" <<a href="mailto:ogg-dev@xiph.org" target="_blank">ogg-dev@xiph.org</a>>; Sergio Castells <<a href="mailto:canistells77@hotmail.com" target="_blank">canistells77@hotmail.com</a>>; Lisandro Conde <<a href="mailto:lisfconde@yahoo.com.ar" target="_blank">lisfconde@yahoo.com.ar</a>>; Muro Gustavo <<a href="mailto:gmuro@fceia.unr.edu.ar" target="_blank">gmuro@fceia.unr.edu.ar</a>> <br>
<b><span style="font-weight:bold">Enviado:</span></b> viernes, 22 de marzo de
2013 0:30</div><div class="im"><br> <b><span style="font-weight:bold">Asunto:</span></b> Re: [ogg-dev] Min and max cutoff frequency<br> </div></font> </div><div><div class="h5"> <br><div><div dir="ltr">On Thu, Mar 21, 2013 at 9:54 AM, Fernando Alberto Marengo Rodriguez <span dir="ltr"><<a rel="nofollow" href="mailto:fmarengorodriguez@yahoo.com.ar" target="_blank">fmarengorodriguez@yahoo.com.ar</a>></span> wrote:<br>
<div><div><blockquote style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div style="font-size:14pt;font-family:'times new roman','new york',times,serif">
<div><span style="color:rgb(0,0,255)"><span><span>I am asking this because we are studying the OGG Vorbis format and its applications. We are very interested in constructing an audio player hardware, based on DSP or DSPic, and the audio files are stored in an SD card.</span></span></span></div>
</div></div></blockquote><div><br></div><div>What is your motivation for constructing this hardware? Is your goal to learn/teach from the experience, or are you trying to build something that you cannot buy?</div><div>
<br></div><div>--Ben</div></div></div></div>
</div><br><br> </div></div></div> </div> </div></div></blockquote></div><br></div></div>