[vorbis-dev] Re: overhead ??

[Francesco Gadaleta]

On Sat, 06 Dec 2003 01:10:45 +0000, Ralph Giles wrote:

> On Sat, Dec 06, 2003 at 01:13:50AM +0100, Francesco Gadaleta wrote:
> 
>> "We simply add the lacing values for the total size; the last lacing value
>> for a packet is always the value that is less than 255. Note that this
>> encoding both avoids imposing a maximum packet size as well as imposing
>> minimum overhead on small packets (as opposed to, eg, simply using two
>> bytes at the head of every packet and having a max packet size of 32k.
>> Small packets (<255, the typical case) are penalized with twice the
>> segmentation overhead). Using the lacing values as suggested, small
>> packets see the minimum possible byte-aligned overheade (1 byte) and large
>> packets, over 512 bytes or so, see a fairly constant ~.5% overhead on
>> encoding space."
> 
> This paragraph gives motivation for the method of marking packet length. What is unclear? I'm 
> happy to elaborate, you do not say what is it you would like explained.
> 
>  -r
> --- >8 ----
> List archives:  http://www.xiph.org/archives/
> Ogg project homepage: http://www.xiph.org/ogg/
> To unsubscribe from this list, send a message to 'vorbis-dev-request at xiph.org'
> containing only the word 'unsubscribe' in the body.  No subject is needed.
> Unsubscribe messages sent to the list will be ignored/filtered.

<p>this encoding both avoids imposing a maximum packet size as well as
imposing minimum overhead on small packets.
The question of overhead is unclear.
Tnx 

<p>
-- 
_________________________________________________
Imagine no possessions
I wonder if you can
No need for greed or hunger
A brotherhood of man
Imagine all the people
Sharing all the world...
		John Lennon
_________________________________________________
_________________________________________________
Francesco Gadaleta - Linux Italian User
      web site: www.gadaleta.org
   email   : francesco at gadaleta.org
_________________________________________________

<p>--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'vorbis-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.