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Re: [Cellar] Colour Format proposal

Dave Rice <dave@dericed.com> Thu, 07 January 2016 18:14 UTC

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From: Dave Rice <dave@dericed.com>
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Date: Thu, 07 Jan 2016 13:14:01 -0500
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To: Jerome Martinez <jerome@mediaarea.net>
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Subject: Re: [Cellar] Colour Format proposal
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> On Jan 7, 2016, at 1:10 PM, Jerome Martinez <jerome@mediaarea.net> wrote:
> 
> Le 07/01/2016 19:09, Peter B. a écrit :
>> On 01/05/2016 10:58 PM, Jerome Martinez wrote:
>>>> Element Name: ColourRange
>>>> Level:        5
>>>> ID:           [55][A4]
>>>> Mandatory:    ma
>>>> Multiple:     -
>>>> Default:      1
>>>> Type:         u
>>>> Description:  (0: Unspecified, 1: Defined by
>>>> ColourMatrix/TransferFunction,
>>>>               2: Full range)
>>> I don't understand the 1 value.
>>> in at least AVC and HEVC, range is orthogonal to
>>> ColourMatrix/TransferFunction.
>>> I propose 0: unspecified 1: Broadcast range 1: Full range
>>> and Default:0
>> Just for the sake of completeness, I think you have a small typo:
>> You proposed:
>> 
>> // ------------------
>> 0: default
>> 1: broadcast range
>> 1: full range
>> // ------------------
>> 
>> 
>> I guess you meant "2" for "full range", as it was before?
> 
> Oops :).
> 
> // ------------------
> 0: unspecified
> 1: broadcast range
> 2: full range
> // ------------------
> 
> and default is 0.

Perhaps a statement is needed on when the value is applicable. For instance is 'broadcast range' with a JPEG2000-RCT encoding valid?

I suggest adding a citation to explain how 'broadcast range' and 'full range' are defined.
Dave

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