SMPTE ST 148-2002 Motion-Picture Film 35- and 16-mm Prints for Television Transmission Film Image Area for Review Room Viewing.pdf

1、1 ScopeThis standard specifies the dimensions of that part of the film image area used for review room viewing of 35-and 16-mm motion-picture prints intended for television transmission, and the placement of this area.2 Dimensions2.1 The dimensions shall be as specified in figure 1 and table 1.for M

2、otion-Picture Film 35- and 16-mm Printsfor Television Transmission Film Image Area for Review Room ViewingRevision ofANSI/SMPTE 148-1991SMPTE 148-2002SMPTE STANDARDPage 1 of 2 pagesApprovedJuly 26, 2002Copyright 2002 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS595 W. Hartsdale Ave., Whi

3、te Plains, NY 10607(914) 761-1100Figure 1 Dimensions35-mm 16-mmInches Millimeters Dimensions Inches Millimeters0.713 max 18.11 max A 0.331 max 8.41 max0.535 max 13.59 max B 0.248 max 6.30 max0.050 1.27 C0.143 3.63 R 0.066 1.68Table 1 Specifications2.2 Dimensions A, B, and R are in conformity with th

4、e safe action area specified in SMPTE RP 27.3,but do not define the printed area.Annex A (informative)Additional informationA.1 Viewing conditionsDuring preparation of motion pictures, the producer, the motion-picture film laboratory personnel, and others examinethe film many times from the original

5、 test shots through many stages to the final release prints. The films are projected in aspecialized theater known as a review room. These installations are designed to permit judgments of projected picture qualityand determinations of the suitability and acceptability of release prints, daily and w

6、ork prints, production tests, printer andprocessing tests, etc. The rooms are constructed to accommodate a small reviewing group of usually 10 to 20 people. Theactual picture size may be large or small, depending upon the space available, but the viewing conditions are chosen toduplicate as nearly a

7、s possible actual conditions whether the print is intended for theatrical viewing or television transmission.All viewing conditions are capable of being precisely controlled and should be held to a minimum tolerance.A.2 Action areaThis standard specifies a film area within which all significant pict

8、ure action should take place, with the intent of ensuringvisibility of that action on a properly adjusted home receiver. Projectors used primarily for inspection of prints rather than forreviewing action expected to show in a typical home television receiver should have apertures at least as large a

9、s requiredto project an image area of 0.792 in by 0.594 in from a 35-mm motion-picture film and of 0.368 in by 0.276 in from a 16-mmfilm. (These are the areas actually scanned during television broadcasting and, therefore, are available for reception by setsadjusted to this extreme.) For review room

10、 purposes, the dimensions of the safe action area should be indicated at the screenand appropriate steps should be taken to ensure that the projected image on the screen is aligned properly so that only thatpart of the picture image area intended to fall within the safe action area actually does so.

11、 Whatever the choice of imagearea to be projected, the need remains for assurance that projection conditions are maintained so that all action intended tofall within the safe action area reaches the projection screen and can be reliably recognized as such, relative to anyadditional picture informati

12、on reaching the screen. Consequently, during a screening, a fixed vertical position relationshipmust be maintained between the film image area and its associated perforations to avoid the need for further framingadjustments.Annex B (informative)BibliographyANSI/SMPTE 233-1998, Motion-Picture Film (1

13、6-mm) Projectable Image Area and Projector UsageSMPTE 96-1999, Television 35- and 16-mm Motion-Picture Film Scanned Image AreaSMPTE 195-2000, Motion-Picture Film (35-mm) Motion-Picture Prints Projectable Image Area SMPTE RP 27.3-1989, Specifications for Safe Action and Safe Title Areas Test Pattern for Television SystemsSMPTE 148-2002Page 2 of 2 pages