1、 Table of Contents Page Foreword . 2 Intellectual Property 2 1 Scope . 3 2 Conformance Notation . 3 3 Normative References . 3 4 Definition 4 5 General Format 4 5.1 Format 4 5.2 Use of the Other Edge . 4 5.3 Film 4 6 Human-Readable Key Numbers 4 6.1 Key Number . 4 6.2 Dimensions 4 6.3 Reference Mark
2、 4 6.4 Alignment with Respect to Perforations. 4 6.5 Repeat Frequency 5 6.6 Format and Orientation 5 7 Machine-Readable Key Numbers 9 7.1 Key Numbers . 9 7.2 Dimensions 9 7.3 Repeat Frequency 9 7.4 Format 9 7.5 Mid-Foot Key Number 10 8 Optional Frame Index Mark 11 9 Optional Manufacturer-Identificat
3、ion Information 11 9.1 Additional Information 11 9.2 Recommended Minimum Information 11 9.3 Repeat Distance. 11 10 Bar Code Scanner and Density Specifications 11 10.1 Scanner Spectral Sensitivity 11 10.2 Quality of Machine-Readable Messages . 12 10.3 Density of Printed Machine-Readable Messages 12 P
4、age 1 of 13 pages SMPTE 270-2008Revision of SMPTE 270-2005 SMPTE STANDARD for Motion-Picture Film (65-mm) Manufacturer-Printed Latent Image Identification Information 80 Perforation Repeat Copyright 2008 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 1060
5、1 (914) 761-1100 Approved October 10, 2008 SMPTE 270-2008 Page 2 of 13 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an internationally-recognized standards developing organization. Headquartered and incorporated in the United States of America, SMPTE has members i
6、n over 80 countries on six continents. SMPTEs Engineering Documents, including Standards, Recommended Practices and Engineering Guidelines, are prepared by SMPTEs Technology Committees. Participation in these Committees is open to all with a bona fide interest in their work. SMPTE cooperates closely
7、 with other standards-developing organizations, including ISO, IEC and ITU. SMPTE Engineering Documents are drafted in accordance with the rules given in Part XIII of its Administrative Practices. This SMPTE Engineering Document was prepared by Technology Committee F2. Intellectual Property At the t
8、ime of publication no notice had been received by SMPTE claiming patent rights essential to the implementation of this Standard. However, attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. SMPTE shall not be held responsible for iden
9、tifying any or all such patent rights. SMPTE 270-2008 Page 3 of 13 pages 1 Scope 1.1 This standard specifies the position and dimensions of machine-readable identification numbers. These numbers are intended to be a machine-readable version of the latent image key number. This standard also specifie
10、s the encoding format to be used for these machine-readable numbers, as well as the area scanned and the spectral characteristics of the scanner. 1.2 This standard also specifies the position, dimensions, and content of human-readable identification (key) numbers for use on 65-mm motion-picture film
11、s intended for original photography or intermediate printing which also include the machine-readable key number described in 1.1. These numbers normally will be exposed onto the film at the time of manufacture. 1.3 This standard further specifies an area that may be used for optional manufacturer-sp
12、ecific film-type identification information. 1.4 This standard also specifies an area on the film which is not to be exposed by the film manufacturer, thus leaving it available for customer data recording. 1.5 Finally, this standard specifies optional frame line index marks. 2 Conformance Notation N
13、ormative text is text that describes elements of the design that are indispensable or contains the conformance language keywords: “shall“, “should“, or “may“. Informative text is text that is potentially helpful to the user, but not indispensable, and can be removed, changed, or added editorially wi
14、thout affecting interoperability. Informative text does not contain any conformance keywords. All text in this document is, by default, normative, except: the Introduction, any section explicitly labeled as “Informative“ or individual paragraphs that start with “Note:” The keywords “shall“ and “shal
15、l not“ indicate requirements strictly to be followed in order to conform to the document and from which no deviation is permitted. The keywords, “should“ and “should not“ indicate that, among several possibilities, one is recommended as particularly suitable, without mentioning or excluding others;
16、or that a certain course of action is preferred but not necessarily required; or that (in the negative form) a certain possibility or course of action is deprecated but not prohibited. The keywords “may“ and “need not“ indicate courses of action permissible within the limits of the document. The key
17、word “reserved” indicates a provision that is not defined at this time, shall not be used, and may be defined in the future. The keyword “forbidden” indicates “reserved” and in addition indicates that the provision will never be defined in the future. A conformant implementation according to this do
18、cument is one that includes all mandatory provisions (“shall“) and, if implemented, all recommended provisions (“should“) as described. A conformant implementation need not implement optional provisions (“may“) and need not implement them as described. 3 Normative References The following standards
19、contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, 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 ap
20、plying the most recent edition of the standards indicated below. SMPTE 270-2008 Page 4 of 13 pages SMPTE 145-2004, Motion-Picture Film (65-mm) Perforated KS USS 128, Uniform Symbology Specification, 1986 version (available from Automatic Identification Manufacturers, Inc., 1326 Freeport Road, Pittsb
21、urgh, PA 15283, U.S.A.) 4 Definition key number: A number, sometimes referred to as an edge number or footage number, that is printed with ink or exposed onto the film at the time of manufacture. The numbers are placed at regular intervals, typically one foot. For the purposes of this standard, the
22、key numbers are latent-image exposed. 5 General Format 5.1 Format The general format of the latent-image identification information shall be as shown in Figure 1. 5.2 Use of the Other Edge No latent information shall be placed along the upper edge of the film, as shown in Figure 1. This area is rese
23、rved for data recording at the time of photography. 5.3 Film This identification information is intended to be printed onto film cut and perforated in accordance with SMPTE 145. 6 Human-Readable Key Numbers 6.1 Key Number An incrementing, human-readable key number shall be printed onto the film at t
24、he time of manufacture. The film shall be supplied to the user with the lowest number at the outside of the roll. 6.2 Dimensions The height and width of the human-readable key numbers shall be as specified in Figure 2 and Table 1. 6.3 Reference Mark A zero-frame reference mark shall be printed adjac
25、ent to the character of the human-readable key number that is closest to the tail of the film as shown in Figure 1. The zero-frame reference mark shall be a filled circle with a diameter of approximately 0.025 in to 0.030 in (0.64 mm to 0.76 mm). 6.4 Alignment with Respect to Perforations The number
26、s shall be printed so that the centerline of the zero-frame reference mark is aligned with the centerline of a perforation, within the tolerance shown in Figure 2. 6.4.1 This alignment is intended to facilitate frame identification with a minimum of confusion, even though the picture frame may have
27、one of several positions relative to the key number. The following rule shall be applied to frame identification: SMPTE 270-2008 Page 5 of 13 pages The frame immediately above the zero-frame reference mark is the one referenced by that key number. Other frames are specified by an offset which is wri
28、tten as an additional digit(s) separated from the key number by a plus sign. Figure 3 shows an example of this rule. 6.5 Repeat Frequency The spacing from one key number to the next shall be 80 perforations. 6.6 Format and Orientation 6.6.1 Number and grouping of digits The human-readable key number
29、 shall consist of 2 alphabetic characters and 10 digits. This alphanumeric code shall be separated into groups of 2 characters and 2, 4, and 4 digits, which in turn shall be separated by spaces (see Figure 1). For the 10 digits, only the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 shall be used, and the
30、y shall be in normal counting sequence. It is recommended, although not required, that the ten thousands place not be allowed to increment within a single roll of film. 6.6.2 Orientation The number may be placed in one of several orientations at the discretion of the film manufacturer. When the orig
31、inal negative film is held with the emulsion toward the viewer and the head toward the right, the numbers may be in any one of the following orientations: Right side up, reading from head to tail Upside down, reading from head to tail Right side up, reading from tail to head Upside down, reading fro
32、m tail to head In all cases, regardless of the orientation, the dot is to the left (closer to the tail) and adjacent to the trailing (closer to the tail) character, as shown in Figure 1. The key number shall precede the machine-readable key number; i.e., the human-readable key number shall be closer
33、 to the head of the roll. SMPTE 270-2008 Page 6 of 13 pages Figure 1 General format SMPTE 270-2008 Page 7 of 13 pages Figure 2 Position and dimensions Table 1 Specifications Dimensions Inches Millimeters A Edge of film to bottom of characters 0.009 0.005 0.23 0.13 A Edge of film t o bottom of bars 0
34、.009 + 0.005 0.009 0.23 + 0.13 0.23 B Height of characters 0.060 0.004 1.52 0.10 B Height of bars 0.060 + 0.010 0.004 1.52 + 0.25 0.10 C Scanning slit length 0.38 max 0.97 max D Scanning slit width 0.005 max 0.13 max E Edge of film to centerline of scanning slit 0.035 0.002 0.89 0.05 F Zero-frame re
35、ference mark displacement 0.00 0.04 0.0 1.0 G Bar code displacement 0.00 0.04 0.0 1.0 H Character-to-character spacing 0.060 nom 1.52 nom J Quiet zone (no print area) 0.100 min 2.54 min SMPTE 270-2008 Page 8 of 13 pages Figure 3 Alignment of zero-frame reference mark 6.6.3 Contents of the alphabetic
36、 characters The first two characters of the key number identify the manufacturer and film type. The character set used shall be the normal upper-case letters A through Z and other symbols at the discretion of the manufacturer. The first character shall identify the film manufacturer alphabetic code
37、according to Table 2. Other letters are reserved for future assignment by the SMPTE. The second character shall be a film-type identifier. The film type identifier will be used in one of two ways per the manufacturers preference. The second character is used alone to identify film type. The second c
38、haracter is used in conjunction with the first character as a two-character film type identifier. The second character is chosen at the discretion of the film manufacturer. Table 2 Manufacturer alphabetic code Manufacturer Code AGFA-GEVAERT, N.V. A EASTMAN KODAK CO. E, K, V FUJIFILM CO. F ILFORD LTD
39、. I Other or nondesignated (nothing) SMPTE 270-2008 Page 9 of 13 pages 7 Machine-Readable Key Numbers 7.1 Key Numbers The machine-readable key numbers are intended to be a machine-readable version of the immediately adjacent human-readable key numbers. 7.2 Dimensions 7.2.1 The dimensions and lateral
40、 location of the machine-readable identification numbers shall be as specified in Figure 2 and Table 1. 7.2.2 The nominal width of the narrowest bar or space shall be 0.0075 in (0.190 mm). All other bars and spaces are to be integer multiples of the narrowest bar as specified in USS 128. The total b
41、ar code message, which consists of 123 elements (not counting the quiet zones), shall have a width of 0.9225 in 0.0400 in (23.432 mm 1.016 mm). For measurement purposes, the width of the bar is the distance between two bar edges. A bar edge is defined as the point where the transmittance is halfway
42、between the maximum adjacent space transmittance and the minimum adjacent bar transmittance. 7.2.3 The message shall be printed so that the trailing edge of the last character (the stop character) shall be longitudinally aligned with the centerline of a perforation, that perforation being six perfor
43、ations displaced from the perforation specified in 6.3, within the tolerance shown in Figure 2. 7.2.4 The recording shall be made so that the azimuth of the record is at an angle of 90 1 to the reference edge of the film. 7.2.5 The lateral location, length, and width of the scanned area shall be as
44、specified in Figure 2 and Table 1. 7.2.6 The reproducing (scanning) slit image shall be positioned at an angle of 90 1 to the reference edge of the film. 7.3 Repeat Frequency The machine-readable message shall be immediately adjacent to the human-readable key number and shall repeat at the same freq
45、uency. 7.4 Format 7.4.1 The machine-readable numbers shall consist of a series of bars and spaces of varying width that meet the bar code specification of USS 128. Code subset C of this specification, which allows double density numeric digits, shall be used. 7.4.2 The data portion of the message sh
46、all be of fixed length and shall consist of 16 digits. Since code subset C encodes two digits per bar code character, this corresponds to 8 bar code characters. In addition, quiet zones, a start character (for code C), a checksum character, and a stop character shall be recorded. Including the start
47、 and stop characters, the entire message shall be 11 bar code characters. 7.4.3 The start character shall be nearest the head end of the film and the stop character shall be nearest the tail end of the film, regardless of the orientation of the human-readable characters; i.e., when the film is trans
48、ported in the normal direction of travel past a fixed scanning position, the start character shall be read first. 7.4.4 The 8 bar code characters (16 data digits) are defined as follows: SMPTE 270-2008 Page 10 of 13 pages 7.4.4.1 The first character shall be encoded with a two-digit manufacturer cod
49、e. These codes shall be assigned as per Table 3. Other codes are reserved for future assignment by the SMPTE. Table 3 Manufacturer codes Manufacturer Code AGFA-GEVAERT, N.V. 21 EASTMAN KODAK CO. 22 FUJIFILM CO. 23 ILFORD LTD. 24 Other or nondesignated 20 7.4.4.2 The second character shall be a two-digit product specification code assigned at the discretion of the manufacturer. If the manufacturer does not wish to ide
