{"id":228590,"date":"2024-10-19T14:51:47","date_gmt":"2024-10-19T14:51:47","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-604612011\/"},"modified":"2024-10-25T08:57:35","modified_gmt":"2024-10-25T08:57:35","slug":"bs-en-604612011","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-604612011\/","title":{"rendered":"BS EN 60461:2011"},"content":{"rendered":"

IEC 60461:2012 specifies a digital time and control code for use in television, film, and accompanying audio systems operating at nominal rate of 60, 59, 94, 50, 30, 29, 97, 25, 24 and 23,98 frames per second. This International Standard specifies a time address, binary groups, and flag bit structure. In addition, the standard specifies a binary group flag assignment, a linear time code transport, and a vertical interval time code transport. It cancels and replaces the third edition published in 2001, of which it constitutes a technical revision. It includes the following significant change with regard to the previous edition: The time code for progressive television systems with a frame rate greater than 30 frames per second is added. This bilingual version (2012-01) corresponds to the monolingual English version, published in 2010-03.<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nCONTENTS <\/td>\n<\/tr>\n
10<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
11<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and reserved
3.1 Terms and definitions <\/td>\n<\/tr>\n
13<\/td>\n3.2 Reserved
4 Time representation in 30 frames per second and 60 frames per second systems
4.1 Definitions of real time and NTSC time
4.2 Time address of a frame <\/td>\n<\/tr>\n
14<\/td>\n4.3 Colour frame identification in NTSC analogue composite television systems
5 Time representation in 25 frames per second and 50 frames per second systems
5.1 Definition of real time
5.2 Time address of a frame <\/td>\n<\/tr>\n
15<\/td>\n5.3 Colour frame identification in PAL analogue composite television systems
6 Time representation in 24-frame systems
6.1 Definitions of real time and NTSC time <\/td>\n<\/tr>\n
16<\/td>\n6.2 Time address of a frame
7 Structure of the time address and control bits
7.1 Numeric code
7.2 Time address
7.3 Flag bits <\/td>\n<\/tr>\n
17<\/td>\n7.4 Use of the binary groups
Tables
Table 1 \u2013 Binary group flag assignments <\/td>\n<\/tr>\n
18<\/td>\n7.5 Clock time reference \u2013 Binary group flag combinations <\/td>\n<\/tr>\n
19<\/td>\n8 Linear time code application
8.1 Code word format
8.2 Code word data content
Table 2 \u2013 LTC time address bit positions <\/td>\n<\/tr>\n
20<\/td>\nTable 3 \u2013 LTC flag bit positions
Table\u00a04 \u2013 LTC binary group bit positions <\/td>\n<\/tr>\n
21<\/td>\n8.3 Modulation method
Table 5 \u2013 LTC synchronization word bit positions and values <\/td>\n<\/tr>\n
22<\/td>\n8.4 Bit rate
8.5 Timing of the code word relative to a television signal
Figures
Figure 1 \u2013 Linear time code source output waveform <\/td>\n<\/tr>\n
23<\/td>\n8.6 Linear time code interface electrical and mechanical characteristics <\/td>\n<\/tr>\n
24<\/td>\nFigure 2 \u2013 29,97\/30 frame linear time code example <\/td>\n<\/tr>\n
25<\/td>\nFigure 3 \u2013 25 frame linear time code example <\/td>\n<\/tr>\n
26<\/td>\nFigure 4 \u2013 24 frame linear time code example <\/td>\n<\/tr>\n
27<\/td>\nFigure 5 \u2013 Linear time code relationship to 59,94 frame progressive video example <\/td>\n<\/tr>\n
28<\/td>\n9 Vertical interval application \u2013 Analogue television systems
9.1 Code word format
9.2 Code word data content <\/td>\n<\/tr>\n
29<\/td>\nFigure 6 \u2013 525\/59,94 vertical interval time code address bit assignment and timing <\/td>\n<\/tr>\n
30<\/td>\nFigure 7 \u2013 625\/50 vertical interval time code address bit assignment and timing <\/td>\n<\/tr>\n
31<\/td>\nTable 6 \u2013 VITC time address bit positions
Table 7 \u2013 VITC flag bit positions <\/td>\n<\/tr>\n
32<\/td>\nTable 8 \u2013 VITC binary group bit positions <\/td>\n<\/tr>\n
33<\/td>\n9.3 Modulation method
9.4 Bit timing
Figure 8 \u2013 Vertical interval time code waveform
Table 9 \u2013 CRC bit positions <\/td>\n<\/tr>\n
34<\/td>\n9.5 Timing of the code word relative to the television signal
9.6 Location of the address code signal in the vertical interval
9.7 Redundancy <\/td>\n<\/tr>\n
35<\/td>\n9.8 Vertical interval time code waveform characteristics
10 Relationship between LTC and VITC
10.1 Time address data
10.2 Binary group data
Table 10 \u2013 VITC logic level ranges <\/td>\n<\/tr>\n
36<\/td>\n10.3 VITC and LTC code word comparison <\/td>\n<\/tr>\n
37<\/td>\nTable 11 \u2013 Summation of VITC and LTC codeword bit definitions <\/td>\n<\/tr>\n
38<\/td>\n11 Progressive systems with frame rates greater than 30 frames per second
11.1 Time address of a frame pair in 50 and 60 frames per second progressive systems
11.2 Implementation guidelines
Figure 9 \u2013 Example of frame labeling for 50 and 60 frames per second progressive systems <\/td>\n<\/tr>\n
39<\/td>\nAnnex A (informative) Explanatory notes <\/td>\n<\/tr>\n
41<\/td>\nAnnex B (informative) Converting time codes when converting video from 24 fps television systems <\/td>\n<\/tr>\n
42<\/td>\nFigure B.1 \u2013 Example of conversion of 23,98 fps video to 525\/59,94\/I <\/td>\n<\/tr>\n
43<\/td>\nFigure B.2 \u2013 Example of conversion of 24 fps high definition video to 625\/50\/I <\/td>\n<\/tr>\n
44<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Time and control code<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2011<\/td>\n48<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":228592,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[642,2641],"product_tag":[],"class_list":{"0":"post-228590","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-160-40","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/228590","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/228592"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=228590"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=228590"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=228590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}