[Libreoffice-ux-advise] [Bug 80196] standardize color palette using mathematically generated colors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80196

--- Comment #18 from Wade D. Peterson <wadep_silicore at yahoo.com> ---
Date: 22 AUG 2014
From: Wade D. Peterson, Silicore Corportion
To:   File
Subj: Comparative analysis using television color bars

Subject: comparative analysis between television color bars and the proposed
grey scale color palette.

Description: this is a comparative analysis.  It describes how a television
color bar standard is applied in the broadcast television industry.  This is
not a proposal; rather it's a way to compare and contrast the proposed grey
scale color palette to a similar technology used in another field.

Talking points:

1) Color bar test patterns are used in the broadcast television industry as a
quality control tool for the purpose of calibrating people, equipment and
systems.  For example, they are used to align color television sets.

2) There is a Wiki at: http://en.wikipedia.org/wiki/Color_bars

3) An example is the EG 1:1990 “Alignment Color Bar Test Signal for Television
Picture Monitors”.  It is published by The Society of Motion Picture and
Television Engineers.  A free pdf archive document can be obtained by
accessing: http://standards.smpte.org/, and then doing a search for “color
bars”.  [I can't post it myself on this thread because of copyright
violations].  Find “EG 1:1990” in the list; you should be able to download it
at no cost.  Note: this is an older analog TV standard that they now make
available at no charge.

4) Figure 2 of the EG 1:1990 shows the how the alignment color bars are
documented in a standard.  This standard is used for the NTSC television
signal.

5) The exact colors such as “YELLOW”, “GREEN” or “RED” are not explicitly
shown.  Instead, they represent saturated electronic signals.

6) The color bars are generally broadcast in conjunction with a 1,000 Hz audio
tone.  This allows the volume level and audio distortion to be calibrated too.

7) In preparation for a television show, the 'bars and tone' (as they are
known) are first broadcast from the studio.  Technicians monitor the signal at
various points along the signal path.  This includes camera equipment;
amplifiers; microwave links; cabling; television transmitters; receivers and TV
sets.

8) The bars and tone are used in two different ways, depending on the
equipment.  A color bar ‘card’ is used to align television cameras.  The camera
is focused on the standard (printed) card, and the output signal is inspected
with an oscilloscope to see if it’s capturing the correct colors in its output
signal.  A color bar ‘pattern generator’ is used to align the rest of the
television network.  The pattern generator produces a standard color signal,
which is then connected to the TV network.  Technicians throughout the network
inspect their signals with an oscilloscope and calibrate their equipment
accordingly.

9) The EG 1:1990 is copyrighted by The Society of Motion Picture and Television
Engineers.

10) Colors themselves are not offered copyright protection in the United
States, or the rest of the world under the Berne convention.

11) A pattern of colors is copyrightable (much like a color photograph) so long
as it expresses an idea, and it takes some level of originality to create it. 
The Courts sometimes use the “sweat of the brow” test to determine this.  That
is, if it took some “sweat of the brow” to make it, then copyright protection
is afforded.

12) The Society of Motion Picture and Television Engineers (SMPTE) has an
intellectual property policy statement at:
https://www.smpte.org/sites/default/files/SMPTE_IP_Policy_2013-08.pdf

13) Section 9.3 of the SMPTE policy is the Copyright Policy.  It says: “The
Society shall own the copyrights of all Engineering Documents and Registered
Disclosure Documents, whether in draft or published form.”

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