{"id":229137,"date":"2024-10-19T14:54:16","date_gmt":"2024-10-19T14:54:16","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iec-61937-142017\/"},"modified":"2024-10-25T09:01:54","modified_gmt":"2024-10-25T09:01:54","slug":"bs-iec-61937-142017","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iec-61937-142017\/","title":{"rendered":"BS IEC 61937-14:2017"},"content":{"rendered":"

This part of IEC 61937 describes the method to convey non-linear PCM bit streams encoded according to the AC-4 format.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
4<\/td>\nCONTENTS <\/td>\n<\/tr>\n
6<\/td>\nFOREWORD <\/td>\n<\/tr>\n
8<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms <\/td>\n<\/tr>\n
9<\/td>\n3.6 Abbreviated terms
4 Mapping of the audio bit stream on to IEC 61937-1
4.1 General
4.2 AC-4 burst-info
Tables
Table 1 \u2013 Shorthand notation for fractional frame rates <\/td>\n<\/tr>\n
10<\/td>\n5 Format of AC-4 data-bursts
5.1 General
5.2 Pause data-burst
5.3 Audio data-burst
5.3.1 The AC-4 data
Table 2 \u2013 Fields of burst-info
Table 3 \u2013 Repetition period of the Pause data-bursts <\/td>\n<\/tr>\n
11<\/td>\nFigures
Figure 1 \u2013 AC-4 data-burst
Table 4 \u2013 Data-type-dependent information for AC-4 <\/td>\n<\/tr>\n
12<\/td>\nTable 5 \u2013 AC-4 base sampling frequency, AC-4 audio framerate and corresponding AC-4 data-burst repetition period
Table 6 \u2013 AC-4 data-burst sequence and repetition period variance at 29,97, 59,94 and 119,88 fps <\/td>\n<\/tr>\n
13<\/td>\nTable 7 \u2013 AC-4 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 48 kHz
Table 8 \u2013 AC-4 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 44,1 kHz <\/td>\n<\/tr>\n
14<\/td>\n5.3.2 Latency of the AC-4 decoder
Figure 2 \u2013 Latency of AC-4 decoding
Table 9 \u2013 Maximum burst-length values per AC-4 data-burst repetition period <\/td>\n<\/tr>\n
15<\/td>\n5.3.3 The AC-4 HBR4 data
Figure 3 \u2013 AC-4 HBR4 data-burst
Table 10 \u2013 Data-type-dependent information for AC-4 HBR4 <\/td>\n<\/tr>\n
16<\/td>\nTable 11 \u2013 AC-4 base sampling frequency, AC-4 audio frame rate and corresponding AC-4 HBR4 data-burst repetition period
Table 12 \u2013 AC-4 HBR4 data-burst sequence and repetition period variance at 29,97, 59,94 and 119,88 fps <\/td>\n<\/tr>\n
17<\/td>\nTable 13 \u2013 AC-4 HBR4 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 192 kHz
Table 14 \u2013 AC-4 HBR4 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 176,4 kHz <\/td>\n<\/tr>\n
18<\/td>\n5.3.4 Latency of the AC-4 HBR4 decoder
Figure 4 \u2013 Latency of AC-4 HBR4 decoding
Table 15 \u2013 Maximum burst-length values per AC-4 HBR4 data-burst repetition period <\/td>\n<\/tr>\n
19<\/td>\n5.3.5 The AC-4 HBR16 data
Figure 5 \u2013 AC-4 HBR16 data-burst <\/td>\n<\/tr>\n
20<\/td>\nTable 16 \u2013 Data-type-dependent information for AC-4 HBR16
Table 17 \u2013 AC-4 base sampling frequency, AC-4 audio frame rate and corresponding AC-4 HBR16 data-burst repetition period <\/td>\n<\/tr>\n
21<\/td>\nTable 18 \u2013 AC-4 HBR16 data-burst sequence and repetition period variance at 29,97, 59,94 and 119,88 fps
Table 19 \u2013 AC-4 HBR16 data-burst: meaning of Pc bits 8 \u2013 11 at an IEC 60958 frame rate of 768 kHz
Table 20 \u2013 AC-4 HBR16 data-burst: meaning of Pc bits 8 to 11 at an IEC 60958 frame rate of 705,6 kHz <\/td>\n<\/tr>\n
22<\/td>\n5.3.6 Latency of the AC-4 HBR16 decoder
Table 21 \u2013 Maximum burst-length values per AC-4 HBR16 data-burst repetition period <\/td>\n<\/tr>\n
23<\/td>\n5.3.7 The AC-4 LD data
Figure 6 \u2013 Latency of AC-4 HBR16 decoding <\/td>\n<\/tr>\n
24<\/td>\nFigure 7 \u2013 AC-4 LD data-burst
Table 22 \u2013 Data-type-dependent information for AC-4 LD
Table 23 \u2013 AC-4 base sampling frequency, AC-4 audio frame rate and corresponding AC-4 LD data-burst repetition period <\/td>\n<\/tr>\n
25<\/td>\n5.3.8 Latency of the AC-4 LD decoder
Table 24 \u2013 AC-4 LD data-burst sequence and repetition period variance at 119,88 fps
Table 25 \u2013 AC-4 LD data-burst: meaning of Pc bits 8 to 11
Table 26 \u2013 Maximum burst-length values per AC-4 data-burst repetition period <\/td>\n<\/tr>\n
26<\/td>\nFigure 8 \u2013 Latency of AC-4 LD decoding <\/td>\n<\/tr>\n
27<\/td>\nFigure A.1 \u2013 An AC-4 sync frame
Annex A (normative) AC-4 sync frame
Table A.1 \u2013 AC-4 sync frame syntax
Table A.2 \u2013 framesize() <\/td>\n<\/tr>\n
28<\/td>\nTable A.3 \u2013 AC-4 syncword values <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Digital audio. Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 – Non-linear PCM bitstreams according to the AC-4 format<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2017<\/td>\n30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":229142,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[641,2641],"product_tag":[],"class_list":{"0":"post-229137","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-160-30","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\/229137","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\/229142"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=229137"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=229137"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=229137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}