Re: N900 battery duration
I wrote a blog post about my ogg vs. mp3 measurements: http://tuomas.kulve.fi/blog/2009/11/07/n900-battery-duration-ogg-vs-mp3/ -- Tuomas ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
Re: N900 battery duration
On Saturday 07 November 2009 11:55:52 Tuomas Kulve wrote: I wrote a blog post about my ogg vs. mp3 measurements: http://tuomas.kulve.fi/blog/2009/11/07/n900-battery-duration-ogg-vs-mp3/ Wow, awseome! thanks for that very interessting blog entry. Regards, Max ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
RE: N900 battery duration
hi, From: maemo-users-boun...@maemo.org [maemo-users-boun...@maemo.org] On Behalf Of ext Tuomas Kulve [tuo...@kulve.fi] Sent: 07 November 2009 12:55 To: maemo-users@maemo.org Subject: Re: N900 battery duration I. wrote a blog post about my ogg vs. mp3 measurements: http://tuomas.kulve.fi/blog/2009/11/07/n900-battery-duration-ogg-vs-mp3/ Sorry to again make these comments after you have run the measurement. But in your cases you are seeing an offset due to the speaker protection algorythms. Running the test with a headset plugged in would get rid of the offset. igor ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
Re: N900 battery duration
igor.sto...@nokia.com wrote: Sorry to again make these comments after you have run the measurement. But in your cases you are seeing an offset due to the speaker protection algorythms. Running the test with a headset plugged in would get rid of the offset. Offset? Is that something that affects the MP3 in a different manner than Ogg? -- Tuomas ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
RE: N900 battery duration
Tuomas Kulve wrote: igor.sto...@nokia.com wrote: Running the test with a headset plugged in would get rid of the offset. Offset? Is that something that affects the MP3 in a different manner than Ogg? It should be the same, but since you are interested in the power consumption of the decoding activity - if i understood correctly - then you get an unknown term, which can also have 2nd order effects due to the different timing and choices that both cpuidle and cpufreq could make. iow, if you have time, it might be interesting to run the test again with an headset. igpr ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
Re: N900 battery duration
igor.sto...@nokia.com wrote: It should be the same, but since you are interested in the power consumption of the decoding activity - if i understood correctly - then you get an unknown term, which can also have 2nd order effects due to the different timing and choices that both cpuidle and cpufreq could make. iow, if you have time, it might be interesting to run the test again with an headset. I was more interested to know the difference between the mp3 and ogg. But I'm also interested to know the difference between the headphones connected and not connected. -- Tuomas ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
Re: N900 battery duration
Hello, igor.sto...@nokia.com a écrit : Tuomas Kulve wrote: igor.sto...@nokia.com wrote: Running the test with a headset plugged in would get rid of the offset. Offset? Is that something that affects the MP3 in a different manner than Ogg? It should be the same, but since you are interested in the power consumption of the decoding activity - if i understood correctly - then you get an unknown term, which can also have 2nd order effects due to the different timing and choices that both cpuidle and cpufreq could make. But how the speaker protection algorythms can make a difference between ffvorbis and libvorbis since the output should be exactly the same ? Jean-Christian ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
RE: N900 battery duration
Tuomas Kulve wrote: I was more interested to know the difference between the mp3 and ogg. Then i think it's more appropriate to do it with headset. Unless yourl typical usecase is really to listen from the speakers - in which case i'd rather recommend to use the fm transmitter and larger speakers from a radio. igor ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
RE: N900 battery duration
Jean-Christian de Rivaz wrote: But how the speaker protection algorythms can make a difference between ffvorbis and libvorbis since the output should be exactly the same ? both cpuidle and cpufreq target the next state based on activity and idleness thresholds. if the algos add just enough to cross any limit that otherwise would not be passed, they can have quite an influence. especially if the performance of the 2 decoders is isgnificantly different. Think about a thrshold-based tax system, if you want a (loose) analogy. igor ___ maemo-users mailing list maemo-users@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-users
