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digraph dtx_dl_amr_fsm {
node [shape = doublecircle] ST_VOICE ST_FACCH_V ST_FACCH ST_SID_U
node [shape = circle]
// default state for non-DTX and DTX when SPEECH is in progress
ST_VOICE -> ST_SID_F1 [ label = "E_SID_F" ]
ST_VOICE -> ST_SID_F1 [ label = "E_SID_U" ]
ST_VOICE -> ST_VOICE [ label = "E_VOICE" ]
ST_VOICE -> ST_VOICE [ label = "E_FACCH" ]
// SID-FIRST or SID-FIRST-P1 in case of AMR HR: start of silence period (might be interrupted in case of AMR HR)
ST_SID_F1 -> ST_SID_F1 [ label = "E_SID_F" ]
ST_SID_F1 -> ST_SID_U [ label = "E_SID_U" ]
ST_SID_F1 -> ST_VOICE [ label = "E_VOICE" ]
ST_SID_F1 -> ST_ONSET_F [ label = "E_FACCH" ]
ST_SID_F1 -> ST_SID_F2 [ label = "E_COMPL" ]
ST_SID_F1 -> ST_F1_INH [ label = "E_INHIB" ]
ST_SID_F1 -> ST_ONSET_V [ label = "E_ONSET" ]
// SID-FIRST P2 (only for AMR HR): actual start of silence period in case of AMR HR
ST_SID_F2 -> ST_SID_U [ label = "E_SID_U" ]
ST_SID_F2 -> ST_VOICE [ label = "E_VOICE" ]
ST_SID_F2 -> ST_ONSET_F [ label = "E_FACCH" ]
ST_SID_F2 -> ST_ONSET_V [ label = "E_ONSET" ]
// SID-FIRST Inhibited: incoming SPEECH or FACCH (only for AMR HR)
ST_F1_INH -> ST_VOICE [ label = "E_VOICE" ]
ST_F1_INH -> ST_FACCH_V [ label = "E_FACCH" ]
// SID-UPDATE Inhibited: incoming SPEECH or FACCH (only for AMR HR)
ST_U_INH -> ST_VOICE [ label = "E_VOICE" ]
ST_U_INH -> ST_FACCH [ label = "E_FACCH" ]
// Silence period with periodic comfort noise data updates
ST_SID_U -> ST_ONSET_F [ label = "E_FACCH" ]
ST_SID_U -> ST_VOICE [ label = "E_VOICE" ]
ST_SID_U -> ST_U_INH [ label = "E_INHIB" ]
ST_SID_U -> ST_SID_U [ label = "E_SID_U" ]
ST_SID_U -> ST_SID_U [ label = "E_SID_F" ]
ST_SID_U -> ST_ONSET_V [ label = "E_ONSET" ]
// ONSET - end of silent period due to incoming SPEECH frame
ST_ONSET_V -> ST_ONSET_V_REC [ label = "E_COMPL" ]
// ONSET - end of silent period due to incoming FACCH frame
ST_ONSET_F -> ST_ONSET_F_REC [ label = "E_COMPL" ]
// ONSET recursion in progress: ONSET itself was already sent, now have to send the voice that caused it
ST_ONSET_V_REC -> ST_VOICE [ label = "E_COMPL" ]
// ONSET recursion in progress: ONSET itself was already sent, now have to send the data that caused it
ST_ONSET_F_REC -> ST_FACCH [ label = "E_COMPL" ]
// FACCH sending state: SPEECH was observed before so once we're done FSM should get back to VOICE state
ST_FACCH_V -> ST_FACCH_V [ label = "E_FACCH" ]
ST_FACCH_V -> ST_VOICE [ label = "E_VOICE" ]
ST_FACCH_V -> ST_VOICE [ label = "E_SID_U" ]
ST_FACCH_V -> ST_SID_F1 [ label = "E_SID_F" ]
// FACCH sending state: no SPEECH was observed before so once we're done FSM should get back to silent period via SID-FIRST
ST_FACCH -> ST_FACCH [ label = "E_FACCH" ]
ST_FACCH -> ST_VOICE [ label = "E_VOICE" ]
ST_FACCH -> ST_SID_F1 [ label = "E_SID_U" ]
ST_FACCH -> ST_SID_F1 [ label = "E_SID_F" ]
}
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