FreeCalypso > hg > gsm-codec-lib
comparison doc/TW-TS-005 @ 592:24aba0e7aa35
document AMR hex (TW-TS-005 Annex C) utilities addition
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Fri, 07 Nov 2025 00:41:56 +0000 |
| parents | d9f6b3125259 |
| children |
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| 591:2f1e91dd552b | 592:24aba0e7aa35 |
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| 1 The original set of Themyscira Wireless utilities for FR and EFR codecs uses an | 1 The original set of Themyscira Wireless utilities for FR and EFR codecs uses an |
| 2 ad hoc binary file format to represent streams of FR or EFR codec frames - see | 2 ad hoc binary file format to represent streams of FR or EFR codec frames - see |
| 3 Binary-file-format article. However, a newer hexadecimal format has now been | 3 Binary-file-format article. However, a newer hexadecimal format has now been |
| 4 standardized as Themyscira Wireless Technical Specification TW-TS-005: | 4 standardized as Themyscira Wireless Technical Specification TW-TS-005: |
| 5 | 5 |
| 6 https://www.freecalypso.org/specs/tw-ts-005-v010003.txt | 6 https://www.freecalypso.org/specs/tw-ts-005-v010100.txt |
| 7 | 7 |
| 8 The standard has two annexes intended for practical use: | 8 The original version of this standard had two annexes intended for practical |
| 9 use: | |
| 9 | 10 |
| 10 * TW-TS-005 Annex A defines a representation format for FR and EFR codecs; | 11 * TW-TS-005 Annex A defines a representation format for FR and EFR codecs; |
| 11 * TW-TS-005 Annex B defines a representation format for HR codec. | 12 * TW-TS-005 Annex B defines a representation format for HR codec. |
| 12 | 13 |
| 14 The current version of TW-TS-005 linked above has two additional annexes: | |
| 15 | |
| 16 * TW-TS-005 Annex C specifies representation of AMR RTP payloads in hex files; | |
| 17 * TW-TS-005 Annex D specifies representation of CSD RTP payloads in hex files. | |
| 18 | |
| 13 The present version of ThemWi GSM codec libraries & utilities suite includes | 19 The present version of ThemWi GSM codec libraries & utilities suite includes |
| 14 some utilities that operate on TW-TS-005 Annex A hex files; support for Annex B | 20 some utilities that operate on TW-TS-005 Annex A hex files; support for Annex B |
| 15 will appear in a future version when our work on GSM-HR codec integration | 21 will appear in a future version when our work on GSM-HR codec integration |
| 16 progresses further. | 22 progresses further. Support for Annex C is described in AMR-hex-utils article; |
| 23 no utilities for Annex D exist as of this writing. | |
| 17 | 24 |
| 18 TW-TS-005 Annex A vs gsmx binary format | 25 TW-TS-005 Annex A vs gsmx binary format |
| 19 ======================================= | 26 ======================================= |
| 20 | 27 |
| 21 For working with FR and EFR codecs, our original binary file format has one | 28 For working with FR and EFR codecs, our original binary file format has one |