[Bug 20367] New: More guidance for converting CEA-608 character codes

https://www.w3.org/Bugs/Public/show_bug.cgi?id=20367

            Bug ID: 20367
           Summary: More guidance for converting CEA-608 character codes
    Classification: Unclassified
           Product: TextTracks CG
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Conversion of 608/708 captions to WebVTT
          Assignee: silviapfeiffer1@gmail.com
          Reporter: silviapfeiffer1@gmail.com
        QA Contact: dave.null@w3.org
                CC: christian.vogler@gallaudet.edu,
                    public-texttracks@w3.org

(Feedback from Christian Vogler:)

Single-byte codes 0x20-0x7f map to the same Unicode code point, EXCEPT for:

0x2a -> U+00E1
0x5c -> U+00E9
0x5e -> U+00ED
0x5f -> U+00F3
0x60 -> U+00FA
0x7b -> U+00E7
0x7c -> U+00F7
0x7d -> U+00D1
0x7e -> U+00F1
0x7f -> U+2588

Two-byte special characters where the second byte maps as follows:

0x30 -> U+00AE
0x31 -> U+00B0
0x32 -> U+00BD
0x33 -> U+00BF
0x34 -> U+2122
0x35 -> U+00A2
0x36 -> U+00A3
0x37 -> U+266A
0x38 -> U+00E0
0x39 -> transparent space
0x3a -> U+00E8
0x3b -> U+00E2
0x3c -> U+00EA
0x3d -> U+00EE
0x3e -> U+00F4
0x3f -> U+00FB

Transparent space probably needs some special considerations to render
correctly. It is sometimes used when multiple characters on-screen
talk simultaneously, in order to position the text for each character
in the same line. The easiest way might be to use the transparent
space as a cue break, and calculate the positioning for the next part
in a new cue similar to to the recommendation for converting midrow
PACs.

-- 
You are receiving this mail because:
You are on the CC list for the bug.

Received on Wednesday, 12 December 2012 22:18:53 UTC