ANSI SMPTE ST 176-1999 Motion-Picture Film (8-mm Type S) - 16-mm Film Perforated 2R-1667 (1-3) - Magnetic Striping.pdf

1、 STD-SMPTE 1176-ENGL 1979 83574011 0003540 435 - CMPTE STANDARD for Motion-Picture Film (8-mm Type S) - SMPTE 176-1 999 Revision of ANSIISMPTE 176-1 994 16-mm Film Perforated 2R-1667 (1 -3) - Magnetic Striping Page 1 of 2 pages 1 Scope This standard specifies the location and dimensions of recording

2、 stripes and balance stripes applied to 16-mm motion-picture film with two rows of 8-mm type S perforations in positions 1 and 3. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publicatio

3、n, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. ANSVSMPTE 151-1 998, Motion-Picture Film (8-mm Type S) - 1

4、6-mm Film Perforated 8-mm Type S, (1 -3) SMPTE 161-1998, Motion-Picture Film (8-mm Type S) - Magnetic Striping 3 Dimensions 3.1 The location and dimensions of the magnetic recording stripes and balance stripes shall be as given in figure 1 and table 1. 3.2 The magnetic striping material shall be app

5、lied to the surface of the film away from a camera or projector lens; for example, toward the light source of a projector arranged for direct front projection on a reflection-type screen. 3.3 The stripes designated as “recording“ are made of a magnetic material and are intended for the audio record.

6、 The stripes adjacent to the perforations are the balance stripes. The balance stripes may be stripes of magnetic or nonmagnetic material of such thickness that the balance and recording stripes project above the surface of the film to substantially the same degree. 4 Film stock The film stock used

7、shall be of the low-shrinkage, safety type, cut and perforated in accordance with ANSVSMPTE 151. NOTES i The width and edge-to-perforation distance of the 8-mm slit strip shall be in accordance with ANSVSMPTE 151. The location of the magnetic record and balance stripes shall be in accordance with SM

8、PTE 161. Consequently, it is not possible to take full advantage of the tolerances of both the slit width and the location of the magnetic record and balance stripes. 2 Tolerances for the center recording stripe and center balance stripe are specified to permit usage of a single wide stripe or two s

9、eparate stripes. If two stripes are used, the amount of separation between the stripes should be sufficient to permit slitting within the requisites of the standard without obtaining undesirable feather edges of magnetic material. The separation required is determined by laboratory practice. 3 Notwi

10、thstanding the tolerance on dimensions M, N, S, and T, the width of the stripes, dimensions N minus M and T minus S, shall be 0.0250 in (0.635 mm) minimum. I I Copyright0 1999 by THE SOCIETYOF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Harisdale Ave., White Plains, NY 10607 (914) 761-1100 Approv

11、ed April 21,1999 STD=SMPTE 17b-ENGL 1999 8357401 0003541 371 SMPTE 176-1999 REFERENCE - EDGE Figure 1 - Recording and balance stripes Table 1 - Specifications Dimensions Inches Millimeters A 0.628 ref 15.95 ref M” 0.285 I 0.002 7.24 I 0.05 ”) 0.312 f 0.002 7.92 f 0.05 P 0.317 f 0.003 8.05 f 0.08 Q 0.329 _+ 0.003 8.36 f 0.08 S) 0.599 I 0.002 15.21 i 0.05 Ti) 0.626 f 0.002 15.90 f 0.05 U 0.003 f 0.003 0.08 I 0.08 v 0.015 f 0.003 0.38 I 0.08 See note 3. Page 2 of 2 pages