Character Set 'ISO number' to Ruby Encoding

Ruby
1

Hi,
I’m trying to decode (convert to utf8) some string from medical data
with escape sequence inside (in some case).
I known the source encoding of these string but in the ‘iso number’
form.
In some case i found a potential encoding but I need some support about
how to map correctly the ‘iso number’ with the corresponding ruby
‘encoding name’ to convert properly the source.
Specific used encodings are:

  1. Japanese (tagged as ISO_IR 13) that include:
    ISO IR 13: G1 code element => JIS X 0201: Katakana
    ISO IR 14: G0 code element => JIS X 0201: Romaji

  2. Thai (tagged as ISO_IR 166) that include
    ISO-IR 166: G1 code element ( TIS 620-2533 (1990) )
    ISO-IR 6: G0 code element (ISO 646)

  3. Japanese (tagged as ISO 2022 IR 13) that include:
    ISO-IR 13: G1 element => JIS X 0201: Katakana (ESC 02/09 04/09)
    ISO-IR 14: G0 element => JIS x 0201: Romaji (ESC 02/08 04/10)

  4. Thai (tagged as ISO 2022 IR 166) that include:
    ISO-IR 166: G1 code element ( TIS 620-2533 (1990) ) (ESC 02/13 05/04)
    ISO-IR 6: G0 code element (ISO 646) (ESC 02/08 04/02)

  5. Japanese (tagged as ISO 2022 IR 87) that include:
    ISO-IR 87: G0 code element => JIS X 0208: Kanji (ESC 02/04 04/02)

  6. Japanese (tagged as ISO 2022 IR 159) that include:
    ISO-IR 159: G0 code element => JIS X 0212: Supplementary Kanji set
    (ESC 02/04 02/08 04/04)

  7. Korean (tagged as ISO 2022 IR 149) that include:
    ISO-IR 149: G1 code element => KS X 1001: Hangul and Hanja (ESC 02/04
    02/09 04/03)

Supposed encoding are

  1. Shift_JIS
  2. TIS-620
  3. G0: Shift_JIS - G1: Shift_JIS
  4. G0: US-ASCII - G1: TIS-620
  5. G0: ISO-2022-JP
  6. G0: ISO-2022-JP
  7. G1: CP949

Is this mapping correct ?

Thanks in advance

Enrico