Re: A proposal for a link timestamp option for ULE/GSE - Comments?

[Klaus Würflinger <kwuerfl@cosy.sbg.ac.at>]

Hi Johan,

PCR is defined in ISO/IEC 13818-1 to be 27MHz => 1/27MHz ~ 37ns.
PCR jitter limits are standardised in ETSI TR 101290.
ETSI standards are available for free download at www.etsi.org

Regards,
Klaus

johanfirdi wrote:
> Hi Georgios,
> 
> how do u calculate PCR number come to37 nsec ?. and maximum allowed is
> 500 nsec.
> Do u have paper for this ?.
> Thanks
> 
> Johan
> 
> Georgios Gardikis wrote:
>> The granularity of the PCR goes down to 37 nsec and the maximum PCR
>> jitter allowed is 500 nsec.
>> The PCR field is 42 bits, and wraps around every 26 hours (it is an
>> incremental counter than a distance from midnight).
>> Maybe we could increase the resolution of the proposed timestamp to be
>> more accurate.
>>
>> George
>>
>> Dr. Georgios Gardikis
>> Associate Researcher
>> NCSR "Demokritos", Institute of Informatics and Telecommunications
>> Athens 153 10, Greece
>> Tel: +30 210 650 3108
>> Fax: +30 210 653 2175
>>
>>
>>
-- 
Klaus Würflinger
Multimedia Communications Group
Dept. of Computer Sciences
Paris Lodron University Salzburg
Jakob-Haringer-Str. 2
5020 Salzburg, Austria
T: (+43)662/8044-6332
F: (+43)662/8044-172
E: kwuerfl@cosy.sbg.ac.at