📄 rfc741.txt
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11 24 32 45 53 85 4711 8359 15175 12 25 33 47 54 87 4838 8596 15618 13 26 34 48 55 90 4969 8840 16075 14 27 35 50 56 93 5104 9092 16545 15 27 36 51 57 95 5242 9351 17029 16 28 37 53 58 98 5385 9618 17529 17 29 38 54 59 101 5533 9894 18043 18 30 39 56 60 104 5684 10177 18572 19 31 40 57 61 107 5841 10469 19118 20 32 41 59 62 111 6002 10770 19681 63 114 infinityCohen [Page 22] NWG/RFC 741 DC 22 Nov 77 42444Specifications for the Network Voice Protocol (NVP) Note: This table has only 58 different intervals defined, since 5 values are repeated in the R(j) table. * This value is the "Transmission Interval" (measured in samples) as defined in item #6 of the NEGOTIATION. Cohen [Page 23] NWG/RFC 741 DC 22 Nov 77 42444Specifications for the Network Voice Protocol (NVP) THE GAIN TABLE (as of 9-17-75) X(J) J R(J) X(J) J R(J) 0 225 0 0 16 245 20 266 1 20 17 289 22 315 2 24 18 342 26 372 3 28 19 404 30 439 4 33 20 478 36 519 5 39 21 565 42 614 6 46 22 667 50 725 7 54 23 789 59 857 8 64 24 932 70 1013 9 76 25 1101 83 1197 10 90 26 1301 98 1415 11 106 27 1538 116 1672 12 126 28 1818 137 1976 13 148 29 2148 161 2335 14 175 30 2539 191 2760 15 207 31 3000 255 infinityCohen [Page 24] NWG/RFC 741 DC 22 Nov 77 42444Specifications for the Network Voice Protocol (NVP) INDEX7 TABLE (as of 9-23-74) X(J) J R(J) X(J) J R(J) X(J) J R(J) 0 15800 27897 0 0 21 16151 42 28106 402 16500 28311 1 804 22 16846 43 28511 1206 17190 28707 2 1608 23 17531 44 28899 2009 17869 29086 3 2411 24 18205 45 29269 2811 18538 29448 4 3212 25 18868 46 29622 3612 19195 29792 5 4011 26 19520 47 29957 4410 19841 30118 6 4808 27 20160 48 30274 5205 20475 30425 7 5602 28 20788 49 30572 5998 21097 30715 8 6393 29 21403 50 30853 6787 21706 30986 9 7180 30 22006 51 31114 7571 22302 31238 10 7962 31 22595 52 31357 8351 22884 31471 11 8740 32 23170 53 31581 9127 23453 31686 12 9512 33 23732 54 31786 9896 24008 31881 13 10279 34 24279 55 31972 10660 24548 32058 14 11039 35 24812 56 32138 11417 25073 32214 15 11793 36 25330 57 32286 12167 25583 32352 16 12540 37 25833 58 32413 12910 26078 32470 17 13279 38 26320 59 32522 13646 26557 32568 18 14010 39 26791 60 32610 14373 27020 32647 19 14733 40 27246 61 32679 15091 27467 32706 20 15447 41 27684 62 32729 15800 27897 32746 63 32758 infinityCohen [Page 25] NWG/RFC 741 DC 22 Nov 77 42444Specifications for the Network Voice Protocol (NVP) INDEX6 TABLE (as of 9-23-74) X(J) J R(J) X(J) J R(J) 0 22595 0 0 16 23170 804 23732 1 1608 17 24279 2411 24812 2 3212 18 25330 4011 25833 3 4808 19 26320 5602 26791 4 6393 20 27246 7180 27684 5 7962 21 28106 8740 28511 6 9512 22 28899 10279 29269 7 11039 23 29622 11793 29957 8 12540 24 30274 13279 30572 9 14010 25 30853 14733 31114 10 15447 26 31357 16151 31581 11 16846 27 31786 17531 31972 12 18205 28 32138 18868 32286 13 19520 29 32413 20160 32522 14 20788 30 32610 21403 32679 15 22006 31 32729 22595 infinityCohen [Page 26] NWG/RFC 741 DC 22 Nov 77 42444Specifications for the Network Voice Protocol (NVP) INDEX5 TABLE (as of 9-23-74) X(J) J R(J) X(J) J R(J) 0 22006 0 0 8 23170 1608 24279 1 3212 9 25330 4808 26320 2 6393 10 27246 7962 28106 3 9512 11 28899 11039 29622 4 12540 12 30274 14010 30853 5 15447 13 31357 16846 31786 6 18205 14 32138 19520 32413 7 20788 15 32610 22006 infinityCohen [Page 27] NWG/RFC 741 DC 22 Nov 77 42444Specifications for the Network Voice Protocol (NVP) APPENDIX 2 IMPLEMENTATION RECOMMENDATIONS (1) It is recommended that the priority-bit be turned ON in the HOST/IMP header. (2) It is recommended that in all abbreviations, "R" be used for Receiver and "X" for Transmitter. (3) The following identifiers and values are recommended for implementations: SLNCTH 30 SILENCE-THRESHOLD. Used for LONG-SILENCE definition. See below. Measured in the same units as GAIN, in its X-table. TBS 1.000 sec TIME-BEGIN-SILENCE. LONG-SILENCE is declared if GAIN<SLNCTH for more than TBS. TAS 0.500 sec TIME-AFTER-SILENCE. A delay introduced by the receiver after the end of LONG-SILENCE, before restarting the playback. TES 0.150 sec TIME-END-SILENCE. The amount of time the transmitter backs up at the end of a LONG-SILENCE in order to ensure a smooth transition back to speech. TRI 2.000 sec TIME-RESPONSE-INITIAL. Time for waiting for response for an initial call (#1 and #3). The initial call is repeated every TRI until an answer arrives, or until TRIGU expires. TRIGU 20.000 sec TIME-RESPONSE-INITIAL-GIVEUP. If no response to an initial call is received within TRIGU after the FIRST initial call, the system gives up, assuming the other system is down. TRQ 1.000 sec TIME-RESPONSE-INQUIRY. If no response to an inquiry (#8) is received within TRQ, the inquiry is repeated.Cohen [Page 28] NWG/RFC 741 DC 22 Nov 77 42444Specifications for the Network Voice Protocol (NVP) TRQGU 10.000 sec TIME-RESPONSE-INQUIRY-GIVEUP. If no response to an inquiry is received within TRQGU from the FIRST inquiry, the system gives up, assuming the other system is down. TBDA 3.000 sec TIME-BETWEEN-DATA-ARRIVAL. If no data arrives within TBDA, an INQUIRY (#8) is sent. This repeats every TBDA. TNR 2.000 sec TIME-NOT-READY. If the other system is in the NOT-READY (#7) state for more than TNR, an INQUIRY (#8) is sent. This repeats every TNR. TNRGU 10.000 sec TIME-NOT-READY-GIVEUP. If the other system is in the NOT-READY (#7) state for more than TNRGU, then the system gives up, assuming the other system is down. TBIN 3.000 sec TIME-BUFFER-IN. The input buffer size is equivalent to the time period TBIN (and its size is the DATA-RATE multiplied by the period TBIN). If the INPUT QUEUE ever gets to be longer than TBIN, data is discarded. TBOUT 3.000 sec TIME-BUFFER-OUT. The output buffer size is equivalent to the time period TBOUT (and its size is the DATA-RATE multiplied by the period TBOUT). If the OUTPUT QUEUE ever gets to be longer than TBOUT, data is discarded.Cohen [Page 29] NWG/RFC 741 DC 22 Nov 77 42444Specifications for the Network Voice Protocol (NVP) REFERENCES Bolt Beranek & Newman, Inc., Report No. 1822, Interface Message Processor: Specifications for the Interconnection of a Host and an IMP. NSC Note 42 (in progress). NSC Note 36, Proposal for NSC-LPC Coding/Decoding Tables, by J. D. Markel, Speech Communications Research Laboratory, Inc., July 20, 1974. NSC Note 45, Everything You Always Wanted to Know about Gain, by E. Randolph Cole, USC/Information Sciences Institute, October 11, 1974. NSC Note 56, Nothing to Lose, but Lots to Gain, by John Makhoul and Lynn Cosell, Bolt Beranek & Newman, Inc., March 10, 1975. NSC Note 58, Gain Again, by Randy Cole, USC/Information Sciences Institute, March 12, 1975.Cohen [Page 30] ⌨️ 快捷键说明
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