Ogg Vorbis Decoding

[DSPFreak]

I'm at the brink of buying a new Cowon iAudio D2 DAP. However I wonder how the Ogg Decoding scheme is done technically. The D2 has a Telechips SoC (System on Chip) containing an ARM Risc 32bit CPU core (host) and a 16bit DSP (co-processor). I know for MP3 decoding the decoding is well divided between the host and co-processor. The bulk of the work is done by the host ie. huffman unpacking ... In case of Ogg decoding is this scheme also applied or is the DSP still doing all the work which means shorter battery life etc ... ??

I ask this very technical question because I have a iRiver iFP895 and the scheme used is as described above, thus ogg playback is terrible: short battery life and no equalizer support.

Thanks for any advice on this issue !

[TimeConsumer]

thus ogg playback is terrible: short battery life and no equalizer support.

Thanks for any advice on this issue !


I did a test when I 1st got my D2 because I had read a comment just like yours. I had just converted my entire collecton to ogg q1 to save space and was a little worried.

Using an album that I encoded to both ogg(q1) and mp3(~128) I separately repeated each folder and found no difference in battery life...Both yielded roughly 24 hours of playback off the SD card from a full charge.


I've not noticed any problems with the eq and ogg files either.

[DSPFreak]

I did a test when I 1st got my D2 because I had read a comment just like yours. I had just converted my entire collecton to ogg q1 to save space and was a little worried.

Using an album that I encoded to both ogg(q1) and mp3(~128) I separately repeated each folder and found no difference in battery life...Both yielded roughly 24 hours of playback off the SD card from a full charge.


I've not noticed any problems with the eq and ogg files either.

Thank you, TimeConsumer, that sounds promising !

It seems that Ogg support is finally getting mature ...