FreeCalypso > hg > rtp-debug-utils
comparison doc/FR-EFR-formats @ 4:5216e7fb1c9e
doc: update for new FR/EFR RTP payload formats
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Sun, 16 Apr 2023 07:55:21 +0000 |
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| 3:50aa973a91ef | 4:5216e7fb1c9e |
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| 1 The two RTP analysis utilities rtp-gsmfr-dump and rtp-gsmfr-extr support the | |
| 2 following RTP payload formats for FR/EFR codec frames and BFI markers: | |
| 3 | |
| 4 * Standard RFC 3551 (same as TS 101 318) format for good frames | |
| 5 | |
| 6 * TRAUlike RTP payload format defined here: | |
| 7 | |
| 8 https://www.freecalypso.org/hg/themwi-system-sw/file/tip/doc/RTP-TRAUlike-format | |
| 9 | |
| 10 * Old BFI marker format defined here: | |
| 11 | |
| 12 https://www.freecalypso.org/hg/themwi-system-sw/file/tip/doc/RTP-BFI-extension | |
| 13 | |
| 14 * Zero-length RTP payload serving as a BFI marker | |
| 15 | |
| 16 All of these formats are distinguished by rtp-gsmfr-dump in its human-oriented | |
| 17 dump output, but not all of them can be represented losslessly in the gsmx | |
| 18 binary file format defined in our Themyscira Wireless GSM codec libraries and | |
| 19 utilities package. The latter on-disk file format requires plain RFC 3551 | |
| 20 format for good frames and the old Themyscira 2-byte BFI marker format for bad | |
| 21 frames; rtp-gsmfr-extr converts everything into this fixed format. |