Vorbis dev - Aug 2014 - ogg segmentation

Hi,
I have started working on ogg vorbis encoder recently. Ogg stream is
structured by dividing incoming packets into logical segments. I have two
questions regarding this.
1) What is the need of segmentation?
2) Why segmentation is performed in size of 255 bytes only? why not more or
less than that?

-- 
*Thanks & Regards,*
*Ajinkya Deshmukh.*
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On 2014-08-13 3:06 AM, Ajinkya Deshmukh wrote:
> 1) What is the need of segmentation?
Segmentation allows interleave and packing of packets with framing data
and other tracks at very low bitrate overhead regardless of packet size.

Typical overheads of the Ogg container are around 1%, versus ~5% for
other popular container formats.
> 2) Why segmentation is performed in size of 255 bytes only? why not more
> or less than that?
This is a consequence of the unary encoding of segment lengths in the
page headers, used to acheive the low overhead with bounded read-ahead.

 -r