27:
87:
466:
To help prevent these problems, SMPTE time code contains a color framing bit, which can be used to indicate that the video material the timecode refers to follows a standard convention regarding the synchronization of video time code and the color framing sequence. If the color framing bit was set in
71:
As a practical matter, VITC can be more 'frame-accurate' than LTC, particularly at very slow tape speeds on analog formats. LTC readers can lose track of code at slow jog speeds whereas VITC can be read frame-by-frame if need be. Conversely, at high speeds (FF/rew.), the VITC is often unreadable due
462:
Preserving the color framing sequence of video across edits and between channels in video effects was an important issue in early analog composite videotape editing systems, as cuts between different color sequences would cause jumps in subcarrier phase, and mixing two signals of different field
430:
Field flag (bit 35 for 29.97/30 frame/s, bit 75 for 25 frame/s): This is an additional least-significant bit for the frame number, distinguishing the two interlaced fields in one video frame. It is set to 0 during the first field of a frame, and to 1 during the second. This bit replaces the
458:
The exact nature of the color frame sequence depends on the video standard being used. In the case of the three main composite video standards, PAL video has an 8-field (4 frame) color frame sequence, and NTSC and SECAM both have 4-field (2 frame) color frame sequences.
434:"Binary group flag" bits BGF0 and BGF2 (bits 55 and 75 for 29.97/30 frame/s, bits 35 and 55 for 25 frame/s): These indicate the format of the user bits. Both bits zero indicates no (or unspecified) format. Only BGF0 set indicates four 8-bit characters (transmitted
467:
both types of material, the editing system could then always ensure that color framing was preserved by constraining edit decisions between input sources to keep the correct relationship between the timecode sequences, and hence the color framing sequences.
67:
A video frame may contain more than one VITC code if necessary, recorded on different lines. This is often used in production, where different entities may want to encode different sets of time-code metadata on the same tape.
401:
numbering is in use; frame numbers 0 and 1 are skipped during the first second of every minute, except multiples of 10 minutes. This converts 30 frame/second time code to the 29.97 frame/second
443:
Bit 74 ("Binary group flag 1") was previously unassigned, but is used to indicate that the time code is synchronized to an external clock. If zero, the timecode start time is arbitrary.
531:
Recommendation ITU-R BR.780-2: Time and control code standards, for production applications in order to facilitate the international exchange of television programmes on magnetic tapes
60:(LTC), embedded in a new frame structure with extra synchronization bits and an error-detection checksum. The exception is that VITC is encoded twice per
30:
VITC Timecode, presented in the VBI space above the active picture area of a SVHS-C camcorder tape. (928x624 crop of 4fsc 1135x625 25i PAL frame via
72:
to image distortions, so the LTC is often used instead. Some VCRs have an auto selection between the two formats to provide the highest accuracy.
75:
VITC is 90 bits long: 32 bits of time code, 32 bits of user data, 18 synchronization bits, and 8 bits of checksum. It is transmitted using
551:
1357:
1281:
1225:
1184:
1614:
613:
812:
582:
This is an example of the 25 frame/s bit assignments, which are different from the more commonly seen 30/29.97 bit assignments.
463:
dominance would result in color artifacts on the part of the signal that was not in sync with the output color frame sequence.
1425:
570:
Indian
Standard IS: 12429 (Part 2) Time and Control Code for Video Tape Recorders: Part 2 Vertical-Interval Time Code (VITC)
1271:
1207:
20:
1645:
450:
the sync bits, so bit 82 is the XOR of bits 74, 66, ..., 2), which can be described as a CRC with generator polynomial
412:
bit, is set to 1 if the time code is synchronized to a (color) video signal. The frame number modulo 2 (for NTSC and
1132:
1583:
1347:
1276:
774:
1098:
1034:
958:
1395:
1311:
998:
922:
846:
1217:
1199:
64:
frame, once in each field, and one additional bit (the "field flag") is used to distinguish the two fields.
19:"VITC" redirects here. For the South African music Festival often referred to as "Vodacom In The City", see
1578:
1415:
1329:
504:
80:
1003:
606:
1342:
1286:
1115:
1051:
993:
988:
983:
978:
973:
968:
917:
907:
654:
577:
79:
encoding at a bit rate of 115 times the line rate. (The unused 25 bit times are to leave room for the
50:
1557:
1446:
1091:
1086:
1076:
902:
499:
398:
1466:
897:
1266:
1588:
942:
599:
421:
568:
427:
Bits 35, 55, and 75 differ between 25 frame/s time code, and 30/29.97 frame/s. The bits are:
1573:
1420:
1410:
1400:
1258:
963:
26:
1608:
1568:
1291:
937:
861:
8:
1563:
1154:
548:
49:
encoded on one scan line in a video signal. These lines are typically inserted into the
1640:
1390:
1017:
76:
796:
1456:
1405:
887:
645:
484:
529:
1603:
1068:
1026:
61:
1598:
1430:
555:
479:
57:
31:
1553:
1548:
1451:
1379:
1367:
1162:
866:
46:
1634:
1375:
1240:
1142:
1137:
792:
752:
748:
744:
740:
736:
732:
728:
724:
720:
680:
662:
494:
446:
The checksum in bits 82–89 is a simple bytewise XOR of the previous 82 bits (
435:
409:
871:
838:
692:
489:
591:
86:
927:
1385:
1319:
1230:
1189:
420:) should be preserved across cuts in order to avoid phase jumps in the
1593:
1172:
712:
672:
1471:
1461:
1352:
1337:
912:
851:
784:
1301:
1248:
764:
892:
828:
688:
760:
1125:
1056:
856:
768:
702:
696:
622:
413:
56:
With one exception, VITC contains the same payload as SMPTE
1543:
1296:
1179:
1120:
1108:
1103:
1081:
1044:
1039:
684:
402:
1167:
756:
535:
417:
170:
90:
VITC Timecode - via digital 720x512 NTSC export process.
340:
285:
230:
175:
1632:
438:). The combinations with BGF2 set are reserved.
607:
431:"polarity correction" bit in linear timecode.
621:
381:
323:
320:
268:
265:
213:
210:
155:
152:
614:
600:
524:
522:
520:
1502:
1500:
85:
25:
517:
1633:
1494:Also used in China's DVB-S/S2 network.
1532:
1497:
1490:
1488:
633:
595:
1533:
454:+1. (Preset to zero, no inversion.)
45:, pronounced "vitsee") is a form of
21:In the City (South African festival)
475:Related technologies and standards
13:
1485:
16:Type of timecode in a video signal
14:
1657:
95:SMPTE vertical interval timecode
371:
367:
364:
357:
346:
316:
312:
302:
291:
261:
257:
247:
236:
206:
202:
199:
192:
181:
148:
634:
561:
542:
1:
999:Field-sequential color system
549:Timecode bit assignment table
510:
1579:Reverse Standards Conversion
505:Rewritable consumer timecode
81:horizontal blanking interval
7:
470:
97:(compliant with SMPTE 12M)
10:
1662:
578:Bureau of Indian Standards
51:vertical blanking interval
39:Vertical Interval Timecode
18:
1646:Film and video technology
1539:
1528:
1480:
1439:
1366:
1328:
1310:
1257:
1239:
1216:
1198:
1153:
1067:
1025:
1016:
951:
880:
837:
821:
805:
783:
711:
671:
653:
644:
640:
629:
500:AES-EBU embedded timecode
353:
350:
347:
317:
298:
295:
292:
262:
243:
240:
237:
207:
188:
185:
182:
149:
109:
106:
103:
554:January 5, 2011, at the
623:Broadcast video formats
1589:Television transmitter
580:. 2002 . pp. 2–5.
422:chrominance subcarrier
397:Bit 14 is set to 1 if
91:
35:
1574:MPEG transport stream
1401:MPEG-1 Audio Layer II
964:Mechanical television
872:Zweikanalton (A2/IGR)
89:
53:of the video signal.
29:
1609:Widescreen signaling
1584:Standards conversion
1569:Moving image formats
1564:Display motion blur
416:) or modulo 4 (for
98:
1615:Analogue TV Topics
178:(0–23, 24, or 29)
94:
92:
77:non-return-to-zero
36:
1628:
1627:
1624:
1623:
1524:
1523:
1520:
1519:
1516:
1515:
1406:MPEG Multichannel
1012:
1011:
558:, Charles Poynton
485:Burnt-in timecode
394:
393:
1653:
1604:Video processing
1534:Technical issues
1530:
1529:
1507:
1504:
1495:
1492:
1023:
1022:
755:(Color systems:
683:(Color systems:
651:
650:
642:
641:
631:
630:
616:
609:
602:
593:
592:
583:
581:
575:
565:
559:
546:
540:
539:
526:
115: Bit
99:
93:
62:interlaced video
1661:
1660:
1656:
1655:
1654:
1652:
1651:
1650:
1631:
1630:
1629:
1620:
1599:Video on demand
1544:14:9 compromise
1535:
1512:
1511:
1510:
1505:
1498:
1493:
1486:
1476:
1435:
1431:MPEG-H 3D Audio
1362:
1324:
1306:
1253:
1235:
1212:
1194:
1149:
1063:
1008:
947:
876:
833:
817:
801:
779:
707:
667:
636:
625:
620:
589:
587:
586:
573:
567:
566:
562:
556:Wayback Machine
547:
543:
528:
527:
518:
513:
480:Linear timecode
473:
342:
287:
232:
177:
96:
58:linear timecode
24:
17:
12:
11:
5:
1659:
1649:
1648:
1643:
1626:
1625:
1622:
1621:
1619:
1618:
1611:
1606:
1601:
1596:
1591:
1586:
1581:
1576:
1571:
1566:
1561:
1554:Digital cinema
1551:
1549:Broadcast-safe
1546:
1540:
1537:
1536:
1526:
1525:
1522:
1521:
1518:
1517:
1514:
1513:
1509:
1508:
1496:
1483:
1482:
1481:
1478:
1477:
1475:
1474:
1469:
1464:
1459:
1454:
1452:Broadcast flag
1449:
1443:
1441:
1440:Hidden signals
1437:
1436:
1434:
1433:
1428:
1423:
1418:
1413:
1408:
1403:
1398:
1393:
1388:
1383:
1372:
1370:
1364:
1363:
1361:
1360:
1355:
1350:
1345:
1340:
1334:
1332:
1326:
1325:
1323:
1322:
1316:
1314:
1308:
1307:
1305:
1304:
1299:
1294:
1289:
1284:
1279:
1274:
1269:
1263:
1261:
1255:
1254:
1252:
1251:
1245:
1243:
1237:
1236:
1234:
1233:
1228:
1222:
1220:
1214:
1213:
1211:
1210:
1204:
1202:
1196:
1195:
1193:
1192:
1187:
1182:
1177:
1176:
1175:
1165:
1159:
1157:
1151:
1150:
1148:
1147:
1146:
1145:
1140:
1130:
1129:
1128:
1123:
1113:
1112:
1111:
1106:
1096:
1095:
1094:
1089:
1084:
1073:
1071:
1065:
1064:
1062:
1061:
1060:
1059:
1049:
1048:
1047:
1042:
1031:
1029:
1020:
1014:
1013:
1010:
1009:
1007:
1006:
1001:
996:
991:
986:
981:
976:
971:
966:
961:
955:
953:
949:
948:
946:
945:
940:
935:
930:
925:
920:
915:
910:
905:
900:
895:
890:
884:
882:
881:Hidden signals
878:
877:
875:
874:
869:
867:Sound-in-Syncs
864:
859:
854:
849:
843:
841:
835:
834:
832:
831:
825:
823:
819:
818:
816:
815:
809:
807:
803:
802:
800:
799:
789:
787:
781:
780:
778:
777:
772:
717:
715:
709:
708:
706:
705:
700:
677:
675:
669:
668:
666:
665:
659:
657:
648:
638:
637:
627:
626:
619:
618:
611:
604:
596:
585:
584:
560:
541:
538:. 2005-04-08 .
515:
514:
512:
509:
508:
507:
502:
497:
492:
487:
482:
472:
469:
456:
455:
444:
441:
440:
439:
432:
425:
406:
392:
391:
380:
377:
374:
370:
369:
366:
363:
360:
356:
355:
352:
349:
345:
344:
338:
337:
334:
331:
328:
325:
322:
319:
315:
314:
311:
308:
305:
301:
300:
297:
294:
290:
289:
283:
282:
279:
276:
273:
270:
267:
264:
260:
259:
256:
253:
250:
246:
245:
242:
239:
235:
234:
228:
227:
224:
221:
218:
215:
212:
209:
205:
204:
201:
198:
195:
191:
190:
187:
184:
180:
179:
173:
172:
169:
166:
163:
160:
157:
154:
151:
147:
146:
145: 9
143:
142: 8
140:
139: 7
137:
136: 6
134:
133: 5
131:
130: 4
128:
127: 3
125:
124: 2
122:
121: 1
119:
118: 0
116:
112:
111:
108:
105:
102:
47:SMPTE timecode
15:
9:
6:
4:
3:
2:
1658:
1647:
1644:
1642:
1639:
1638:
1636:
1616:
1612:
1610:
1607:
1605:
1602:
1600:
1597:
1595:
1592:
1590:
1587:
1585:
1582:
1580:
1577:
1575:
1572:
1570:
1567:
1565:
1562:
1559:
1555:
1552:
1550:
1547:
1545:
1542:
1541:
1538:
1531:
1527:
1503:
1501:
1491:
1489:
1484:
1479:
1473:
1470:
1468:
1465:
1463:
1460:
1458:
1455:
1453:
1450:
1448:
1445:
1444:
1442:
1438:
1432:
1429:
1427:
1424:
1422:
1419:
1417:
1414:
1412:
1409:
1407:
1404:
1402:
1399:
1397:
1394:
1392:
1389:
1387:
1384:
1381:
1377:
1374:
1373:
1371:
1369:
1365:
1359:
1356:
1354:
1351:
1349:
1346:
1344:
1341:
1339:
1336:
1335:
1333:
1331:
1327:
1321:
1318:
1317:
1315:
1313:
1309:
1303:
1300:
1298:
1295:
1293:
1290:
1288:
1285:
1283:
1280:
1278:
1275:
1273:
1270:
1268:
1265:
1264:
1262:
1260:
1256:
1250:
1247:
1246:
1244:
1242:
1241:MPEG-4 Visual
1238:
1232:
1229:
1227:
1224:
1223:
1221:
1219:
1215:
1209:
1206:
1205:
1203:
1201:
1197:
1191:
1188:
1186:
1183:
1181:
1178:
1174:
1171:
1170:
1169:
1166:
1164:
1161:
1160:
1158:
1156:
1152:
1144:
1141:
1139:
1136:
1135:
1134:
1131:
1127:
1124:
1122:
1119:
1118:
1117:
1114:
1110:
1107:
1105:
1102:
1101:
1100:
1097:
1093:
1090:
1088:
1085:
1083:
1080:
1079:
1078:
1075:
1074:
1072:
1070:
1066:
1058:
1055:
1054:
1053:
1050:
1046:
1043:
1041:
1038:
1037:
1036:
1033:
1032:
1030:
1028:
1024:
1021:
1019:
1015:
1005:
1002:
1000:
997:
995:
992:
990:
987:
985:
982:
980:
977:
975:
972:
970:
967:
965:
962:
960:
957:
956:
954:
950:
944:
941:
939:
936:
934:
931:
929:
926:
924:
921:
919:
916:
914:
911:
909:
906:
904:
901:
899:
896:
894:
891:
889:
886:
885:
883:
879:
873:
870:
868:
865:
863:
860:
858:
855:
853:
850:
848:
845:
844:
842:
840:
836:
830:
827:
826:
824:
820:
814:
811:
810:
808:
804:
798:
794:
791:
790:
788:
786:
782:
776:
773:
770:
766:
762:
758:
754:
750:
746:
742:
738:
734:
730:
726:
722:
719:
718:
716:
714:
710:
704:
701:
698:
694:
690:
686:
682:
679:
678:
676:
674:
670:
664:
661:
660:
658:
656:
652:
649:
647:
643:
639:
632:
628:
624:
617:
612:
610:
605:
603:
598:
597:
594:
590:
579:
572:
571:
564:
557:
553:
550:
545:
537:
533:
532:
525:
523:
521:
516:
506:
503:
501:
498:
496:
495:MIDI timecode
493:
491:
488:
486:
483:
481:
478:
477:
476:
468:
464:
460:
453:
449:
445:
442:
437:
436:little-endian
433:
429:
428:
426:
423:
419:
415:
411:
410:color framing
407:
404:
400:
396:
395:
389:
385:
378:
375:
372:
361:
358:
339:
335:
332:
329:
326:
309:
306:
303:
284:
280:
277:
274:
271:
254:
251:
248:
229:
225:
222:
219:
216:
196:
193:
174:
167:
164:
161:
158:
144:
141:
138:
135:
132:
129:
126:
123:
120:
117:
114:
113:
101:
100:
88:
84:
82:
78:
73:
69:
65:
63:
59:
54:
52:
48:
44:
40:
33:
28:
22:
1155:MPEG-2 Video
932:
693:Clear-Vision
588:
569:
563:
544:
530:
490:CTL timecode
474:
465:
461:
457:
451:
447:
408:Bit 15, the
387:
383:
176:Frame number
74:
70:
66:
55:
42:
38:
37:
1613:Templates (
1330:MPEG-H HEVC
1069:Progressive
1635:Categories
1457:Captioning
1259:MPEG-4 AVC
1027:Interlaced
952:Historical
888:Captioning
847:BTSC (MTS)
822:1250 lines
806:1125 lines
635:Television
511:References
399:drop frame
382:CRC bits (
171:User bits
110:User bits
32:VHS-Decode
1641:Timecodes
1594:Test card
1267:ATSC A/72
1173:DVB 3D-TV
785:819 lines
713:625 lines
673:525 lines
655:405 lines
448:including
405:standard.
107:Timecode
1506:Defunct.
1472:Teletext
1338:ATSC 3.0
994:567-line
989:455-line
984:441-line
979:375-line
974:343-line
969:180-line
959:Pre-1940
913:Teletext
793:System E
721:System B
681:System M
663:System A
552:Archived
471:See also
1353:ISDB-S3
1302:MobaHo!
1249:MobaHo!
1018:Digital
765:PALplus
343:(0–23)
288:(0–59)
286:Minutes
233:(0–59)
231:Seconds
1426:HE-AAC
1348:HD DMB
893:CGMS-A
829:HD-MAC
689:NTSC-J
646:Analog
1368:Audio
1320:ABS-S
1292:SBTVD
1231:ABS-S
1190:ABS-S
1133:UHDTV
1126:1080p
1057:1080i
857:NICAM
839:Audio
769:SECAM
761:PAL-N
703:B-MAC
697:PAL-M
574:(PDF)
414:SECAM
390:+ 1)
341:Hours
104:Sync
1462:CPCM
1416:LPCM
1386:AC-4
1376:AC-3
1358:DTMB
1312:AVS2
1297:1seg
1282:DTMB
1272:CMMB
1226:DTMB
1218:AVS+
1208:CMMB
1185:DTMB
1180:ISDB
1163:ATSC
1121:720p
1116:HDTV
1109:576p
1104:480p
1099:EDTV
1092:288p
1087:240p
1082:1seg
1077:LDTV
1052:HDTV
1045:576i
1040:480i
1035:SDTV
1004:OSKM
933:VITC
923:VEIL
852:EIAJ
813:MUSE
685:NTSC
403:NTSC
384:g(x)
43:VITC
1558:DCI
1467:EPG
1447:AFD
1421:AAC
1411:PCM
1396:DRA
1391:DTS
1380:5.1
1343:DVB
1287:DVB
1277:DMB
1200:AVS
1168:DVB
943:XDS
938:WSS
928:VIT
918:VBI
908:PDC
903:GCR
898:EPG
862:SAP
775:MAC
757:PAL
536:ITU
418:PAL
373:80
348:70
318:60
293:50
263:40
238:30
208:20
183:10
83:.)
1637::
1499:^
1487:^
1143:8K
1138:4K
795:,
767:,
763:,
759:,
751:,
747:,
743:,
739:,
735:,
731:,
727:,
723:,
695:,
691:,
687:,
576:.
534:.
519:^
386:=
379:0
368:F
362:20
359:10
354:0
336:8
324:0
313:F
310:40
307:20
304:10
299:0
281:8
269:0
258:F
255:40
252:20
249:10
244:0
226:8
214:0
203:C
197:20
194:10
189:0
168:8
156:0
150:0
34:)
1617:)
1560:)
1556:(
1382:)
1378:(
797:F
771:)
753:N
749:L
745:K
741:I
737:H
733:G
729:D
725:C
699:)
615:e
608:t
601:v
452:x
424:.
388:x
376:1
365:S
351:1
333:4
330:2
327:1
321:1
296:1
278:4
275:2
272:1
266:1
241:1
223:4
220:2
217:1
211:1
200:D
186:1
165:4
162:2
159:1
153:1
41:(
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
