[gmpi] Re: Reqs 3.9. Time - opening arguments.1

  • From: Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx>
  • To: gmpi@xxxxxxxxxxxxx
  • Date: Thu, 05 Feb 2004 14:47:55 -0500

>On Thu, Feb 05, 2004 at 02:24:44PM -0500, Paul Davis wrote:
>> UST has defined, externally meaningful units (usecs or nanosecs) and
>> is guaranteed monotonic. If you two events of any kind with two UST
>
>If it is guaranteed linear, then you don't need a UST timestamp per event.

i never said "guaranteed linear". thats not what monotonic means.

>I can grok that.  Finally, I grok that.  BuT now I don't see why you need
>UST per event, if it is linear, it has a defined relationship to the sample
>time.
>
>UST(sample) = UST_base_offset + sample * UST_per_sample

you can't know UST_per_sample. its not guaranteed constant. both the
UST timeflow and the audio sample clock have drift.

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