Hi Guys,
Surely the "i" at the end of 1080i means "Interlaced" doesn't it? Which
would differentiate it, for instance from 1080PsF.
In other words, 1080 specifies the line count, i means interlaced, and
then other information is requred to specify frame rate?
So, 24P couldn't be called 1080i.
Or have I completely misundertood something here?
Cheers,
Tone :)
>
> Mathew Sherman wrote:
>
>> Yet again I must remind everyone that saying ?1080i? does not have
>> anything to do with frame rate. People are getting confused when
>> people tell them ?we need 1080i? that it somehow precludes them from
>> working at 24PsF. But the only thing truly that 1080i means (in this
>> case I am referring to the HDNet spec) is that they do not want 720P
>> originals. Sony HDCAM is a 1080i format regardless of what frame rate
>> you are using. 24P is also 1080i and that is exactly what HDNet means.
>> They don?t like DVCPRO-HD since it?s low bit rate (100Mbps) and is a
>> 720P format (natively).
>>
>> In terms of what to do for a possible film-out well definitely working
>> progressive will help the film look better, however these days there
>> are such good de-interlacing tools that I bet one would have a hard
>> time telling the difference between 59.94i (proper term) or 23.976PsF
>> on the cinema screen once all is said and done, properly.
>>
> Sorry to disagree Matt but in the US 1080i has become synonymous with
> 59.94 fields. Mark Cuban was involved in a discussion on the Telecine
> Internet Group last year on this topic. He was quite adamant that the
> research they've done on viewer preferences were so strongly in favor of
> the higher frame rate that they chose to require that for delivery. I'm
> not surprised since Mark Cuban is so involved with sports broadcasting
> and the higher temporal resolution makes a difference. I happen to
> prefer 720p for sports for the same reason - disclaimer: I'm ex-ABC
> engineering.
> If you're planning a film out there is a big advantage to working in 24p
> (again, common usage in the US translates to 1080psf(at)23.97 - even for
> film jobs you'd need to specify true 24p if you didn't want 23.97psf!).
> Yes, there are de-interlace tools but it doesn't look the same and we've
> been through it on numerous projects.
>
> --
> Richard Torpey
> VP Engineering
> Rhinoceros/MultiVideo Group
> 50 East 42 Street
> New York, NY 10017
> (212) 986-1577
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> (212) 692-4465 direct
>
>
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