Multichannel Audio (MCA) Labels: VisuallyImpairedNarrativeAudioChannel MCA Tag Name

[thomasheritage]

e.g. see https://amwa-tv.github.io/AS-11_X1/AMWA_AS_11_X1.html#2f41d1241c4a3beadcbe7f82606f23b0

The MCA Tag Name is given as "Visually Impaired Narrative" but I think it should probably be "Visually Impaired-Narrative"

[thomasheritage]

Per #139 it might be best to recognise that this MCA Tag Name discrepancy is just one of several differences between how AS-11 X Specifications use MCA and (emerging) practice in IMF (and elsewhere). An alternative is to change the AS-11 X Specifications.

[thomasheritage]

It might be useful to add a short warning in the table in https://amwa-tv.github.io/AS-11_X1/AMWA_AS_11_X1.html#2f41d1241c4a3beadcbe7f82606f23b0 that in IMF & DCP this value contains a "-" (probably easier to do this than in a Note, but could include a Note with more explanation as well). A similar comment could be added to bmx code.

[Matthew-Marks]

Issue created in bmx.

[Matthew-Marks]

Comment added to code - bmx issue resolved.

[thomasheritage]

Further research demonstrating that the MCA Tag Name used in AS-11 is wrong:

• Table 1 of SMPTE ST 428-12:2013 has a line-break in an unfortunate place, but the text below the table shows "Visually Impaired-Narrative"
• asdcplib contains "Visually Impaired-Narrative"
• The SMPTE DCP test package uses "Visually Impaired-Narrative"

[thomasheritage]

Conclusions: remaining actions to resolve this issue:

• [x] add a short warning in the table in https://amwa-tv.github.io/AS-11_X1/AMWA_AS_11_X1.html#2f41d1241c4a3beadcbe7f82606f23b0 that in IMF & D-Cinema / DCPs this value contains a "-" (probably easier to do this than in a Note, but could include a Note with more explanation as well). Presumably this will update all AS-11 X* specs (in a non-substantive way)

[Matthew-Marks]

https://amwa-tv.github.io/AS-11_X1/AMWA_AS_11_X1.html#3d97e3e08cb8e36c02692b61d2c4d146 - note URL has changed due to other updates.