[M4IF Technotes] (no subject)

[Stathis Voukelatos]

Hi,
The modulo_time_base is used to reconstruct at the decoder a time  
base with one second resolution. The way I understand 
it, in practice it represents the number of full seconds that have
elapsed since the last decoded VOP with a non-zero 
modulo_time_base (or since the time code indicated by a GOV header
if there was one). 
The number of seconds are stored as a series of '1' followed by
a '0' at the end.
As a simple example if you take a stream with a constant frame rate
of 30 fps, then for every 30th VOP the modulo_time_base will
be '10' (binary) while for all other VOPs it will be '0'.
Cheers,
Stathis
Stathis Voukelatos, PhD      
Software Engineer       
IndigoVision Ltd     
The Edinburgh Technopole
Bush Loan, Edinburgh
Scotland, UK
EH26 0PJ
+44 (0)131 4757345      
+44 (0)131 4757201 (Fax)  
http://www.indigovision.com
> -----Original Message-----
> From: wuks   bhnec.nec.co.jp [mailto:wuks   bhnec.nec.co.jp]
> Sent: Wednesday, March 27, 2024 9:17 AM
> To: technotes   lists.m4if.org
> Subject: [M4IF Technotes] (no subject)
> 
> 
> hi,
> 
>     what is the meaning of the parameter modulo_time_base in 
> theVOP,can
> somebody give a example?
> 
> thank for your time!
> 
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