1、STD-SMPTE 3bM-ENGL 3778 8357403 000309Li OT3 = SMPTE STANDARD for Television Analog Recording - 1-in Type B Helical Scan - Records SMPTE 16M-1998 Revision of ANSISMPTE 16M-1992 1 Scope This standard specifies the dimensions and location of the video, audio, and tracking-control records and the longi
2、tudinal separation of the simultaneously recorded information of the video and audio records, as recorded on 1 -in type B helical-scan television tape recordings. 2 General specifications 2.1 The dimensions in the metric system are primary. The English equivalents are derived and may deviate from es
3、tablished conversion practices. 2.2 The reference edge for dimensions in this standard shall be the lower edge as shown in figure 1. 2.3 Tests and measurements made on the re- corder to check the requirements of this stand- ard shall be made under the following atmospheric conditions: -temperature -
4、 relative humidity - barometric pressure -conditioning before testing 24 h 23“Ck 1 “C (73“Fk 2F) (50 f 2)“h 86 to 106 kPa (860 to 1060 mbar) Page 1 of 3 pages 3 Dimensions and position of the recorded records 3.1 The lateral location and dimensions of the video, audio, and control tracks shall be in
5、 ac- cordance with figure 1 and table 1. 3.2 The nominal width of audio records 1, 2, and 3 shall be 0.8 mm (0.031 in). 3.3 The audio and cue recordings shall be down- stream from the associated video information (see dimension J in figure 1 and table 1). 3.4 The audio recording shall be made so tha
6、t the azimuth of the recorded record is at an angle of 90“ I 5 to the reference edge of the tape. Audio 1 and 2 head gaps shall be in line. 3.5 The position of the field synchronizing signal on the video record shall be 7.609 mm f 0.024 mm (0.29957 in k 0.00094 in) from the intersec- tion of Lt and
7、X, in the direction of tape travel as measured along the video track. 3.6 The cue signal and time code shall be re- corded on the audio 3 track. Copyright Q 1998 by THE SOCIEM OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hamdale Ave., White Plains, NY 10807 (914) 761 -1 100 Approved September 1
8、,1998 STD-SMPTE LbM-ENGL 1778 8357LiOL 0003095 T38 SMPTE 16M-1998 Y x X r- A I I 1- I AUDIO AUDIO + -REFERENCE EDGE CONTROL TRACK RY CONTROL TRACK START OF VERTICAL SYNC PULSE Figure 1 - Record location and dimensions Page 2 of 3 pages STD-SMPTE LbM-ENGL 1998 83574031 000309b 974 SMPTE 161-1998 Tabl
9、e 1 - Dimensions Dimensions Mi I I i me te rs Ab At *) Bb Bt cb Ct Fb Ft G J Kb Kt Lb Lt N O P Qe QS S a0 ai Control track bottom edge Control track top edge Audio 1 track bottom edge Audio 1 track top edge Audio 2 track bottom edge Audio 2 track top edge Audio 3 track bottom edge Audio 3 track top
10、edge Center of video tape Position of audio heads Full video width bottom edge Full video width top edge Video width (1 80“) bottom edge Video width (180“) top edge Video track pitch Video track width Position of control track head Switch point distance video track 2 Switch point distance video trac
11、k 1 Distance between control track head gap and Scanning angle Video track angle (52560) center edit pulse at 180“ switch point 23.55 min 23.65 max 23.95 min 24.06 max 24.35 min 24.45 max 25.15 min 25.26 max 22.35 min 22.45 max 23.15 min 23.26 max 0.15 min 0.25 max 0.95 min 1.05 max 12.70 ref 232.0
12、min 233.0 max 1.18 min 22.19 max 1.82 min 21.55 rnax 0.200 ref 0.155 min 0.165 max 2.84 min 2.88 max 82.096 min 82.121 max 5.523 min 5.533 max 0.040 ref 14.434“ 14.288“ Inches 0.9272 min 0.9311 max 0.9429 min 0.9472 max 0.9587 min 0.9626 max 0.9902 min 0.9945 max 0.8799 min 0.8839 max 0.9114 min 0.9
13、157 max 0.0059 min 0.0098 max 0.0374 min 0.0413 max 0.5000 ref 9.134 min 9.173 max 0.0465 min 0.8736 max 0.0717 min 0.8484 max 0.00787 ref 0.00610 min 0.00650 max 0.1118 min 0.1134 max 3.23213 min 3.23311 max 0.21744 min 0.21783 max 0.00157 ref NOTES b is the dimension from the reference edge to the bottom of the record. 2, t is the dimension from the reference edge to the top of the record. Annex A (informative) Bibliography SMPTE 15M-1998, Television Analog Recording - 1 -in Type B Helical Scan - Basic System Parameters Page 3 of 3 pages
