ITU-R BR 1374-1-2001 Scanned Area Dimensions from 16 MM and 35 MM Cinematographic Film Used in Television《用于电视的16mm和35mm电影胶片的扫描区域尺寸》.pdf

1、Rec. ITU-R BR.1374-1 1 RECOMMENDATION ITU-R BR. 1374- 1 * Scanned area dimensions from 16 mm and 35 mm cinematographic film used in television (Question ITU-R 240/11) (1998-2001) The ITU Radiocommunication Assembly, considering that the image aspect ratios of television and film, in particular wide-

2、screen feature films that the conversion of film images for television takes place in telecine equipment that that it is normal practice in broadcasting organization to transfer programmes originated on that, more and more often, films are transferred to video by external post-production or that bro

3、adcasters would like to specify the expected picture area on film received as video that there should be recommendations specifying scanned area dimensions for television, that there should be recommendations specifying image areas dimensions for film specially a) made for cinema presentation, do no

4、t coincide; b) offers a multiple choice of what film image area dimensions to transfer to video for television; c) film to video tape for programme transmission, exchange and distribution; d) facilities houses rather than in-house by broadcasters; e) from other organizations; f) from release films,

5、that take into account established standards for optical projection; g) shot and framed for television, recommends 1 that the scanned area dimensions, for film shot and framed for optical projection or television, listed in this Recommendation, should be used as reference values for transferring fil

6、m images for use in television EBU R86 - 1997 “Scanned area dimensions from films for television”: - - - - Tables 1 and 3 specify scanned area dimensions for 4:3 television; Tables 2 and 4 specify scanned area dimensions for 16:9 television; Figures 1-2 show the aspect ratio relations for 4:3 televi

7、sion; Figures 3-4 show the aspect ratio relations for 16:9 television; * This Recommendation should be brought to the attention of the International Standards Organization (IS0 TC-36) and the Society of Motion Picture and Television Engineers (SMPTE). . 65 2 Rec. ITU-R BR.1374-1 - Appendix 1 shows t

8、he intentions, principles and anchor (reference) values behind the scanned area dimensions listed in Tables 1 to 4. NOTE - This Recommendation replaces Recommendations ITU-R BR.782, ITU-R BR.783, ITU-R BR.716, ITU-R BR.1291, IT-R BR.1288 and ITU-R BR.1289. TABLE 1 Film shot and framed for projection

9、 and scanned for 4:3 television (Scanned area dimensions from images on film intended for contact printing and projection. The film material can be a print, an Image aspect ratio intermediate or camera origina!, Scanned area dimensions I fiamedfor I displayed on TV width I height I centre appearance

10、 notes 4:3 full screen 4:3 full screen 2.39: 1 letterbox Cropped area on the film image = Black area on the television display u 1.1.1 1.33:l 4:3 full screen 9.65 1.1.2 1.33:l 4:3 full screen 9.35 NOTE 1 -These dimensions are based on the “projected area” dimensions in IS0 359 Standard- Cinematograp

11、hy - “Projectable image area on 16 mm motion-picture prints”. . 1 2 1.24 1.98 7.01 1.98 66 Rec. ITU-R BR.1374-1 Image aspect ratio fi-amed for displayed on TV 3 Scanned area dimensions width height centre appearance notes NOTE 2 - These dimensions are based on the “transmitted area” dimensions in IS

12、0 1223 Standard - Cinematography - “Picture areas for motion picture films for television”. These dimensions are related to the historic concept of scanning film for television transmission. NOTE 3 -These dimensions are based on the “projected area” dimensions in IS0 2907 Standard - Cinematography -

13、 “Maximum projectable Image area on 35 mm motion picture film”. NOTE 4 - The television display will show the film image with areas on each side cropped. NOTE 5 - The television display will show black areas at top and bottom of the film image. TABLE 2 Film shot and framed for projection and scanned

14、 for 16:9 television (Scanned area dimensions from images on film intended for contact printing and projection. The Jilm material can be a print, an intermediate or camera origina0 2.1.1 1.33:i 1.33:l letterbox 9.65 7.26 7.98 1 - - Cropped area on the film image = Black area on the television displa

15、y i.-.- NOTE 1 - The television display will show black areas on each side ofthe film area. NOTE 2 - The television display will show the film image with areas top and bottom cropped. 67 4 Rec. ITU-R BR.1374-1 Image aspect ratio NOTE 3 - The television display will show the film image with areas on

16、each side cropped. NOTE 4 - The television display will show black areas at top and bottom of the film area. TABLE 3 Film specially shot and framed for television and scanned for 4:3 television (Scanned area dimensionsfi.om images on film not intended for contact printing and projection. The film ma

17、terial will normally be a camera original) Scanned area dimensions framed for displayed on TV I width height centre appearance notes 4:3 fullscreen 1 9.15 1 6.86 1 9.00 1 )1-; 1 I, 6 1 3.1.3 1 1619 1 3. I 3.1.1 1.66:l 4:3 full screen 9.80 7.35 9.00 Super 16 mm aperture 1,6 li L 3.1.2”* 1.66: 1 1.66:

18、 1 letterbox 7 : ! i , ,: i i I ,;., i Cropped area on the film image = Black area on the television display 12.20 7.35 9.00 2,6 NOTE 1 - The television display will show the film image with areas on each side cropped. NOTE 2 - The television display will show black areas at the top and bottom of th

19、e film area. NOTE3-These dimensions are derived from the camera aperture dimensions in standard ANSVSMPTE 59 - “35 mm Camera Aperture Images and Usage”. NOTE 4 - These dimensions are derived from the camera aperture dimensions in DIN Standard 15502 - 6 Film 35 mm; Image produced by camera aperture a

20、nd projected image area 1.33:l. NOTE 5 - These scanned area dimensions are based on current production practice since no standard yet exists. 3.1.4 NOTE 6 - These dimensions are calculated for unspliced film. 16:9 16:9 letterbox 12.20 6.86 9.00 2,6 68 3.2.1 3.2.2 3,6 4 4:3 4:3 full screen 24.00 18.0

21、0 17.48 0 4:3 4:3 full screen 23.50 17.63 17.48 3.3 3.3.1 4:3 4:3 full screen 18.00 13.50 17.48 Super 35 mm: 3-perf: aperture 5,6 Rec. ITU-R BR1374-1 framed for displayed on TV I width I height 1 centre 4.1 Super 16 mm aperture 5 appearance notes TABLE 4 Film specially shot and framed for television

22、 and scanned for 16:9 television 4.1.1 (Scanned area dimensions from images on film not intended for contact printing and projection. The film material will normally be a camera origina!, 16:9 16:9 full screen 12.20 6.86 4 I I Image aspect ratio I Scanned area dimensions I I I 4.2.2 16:9 16:9 full s

23、creen 23.50 13.22 17.48 2 16:9fullscreen I 24.00 1 13.50 1 17.48 1 1 1 I 1 4.21 1 16:9 1 16:9 full screen 1 24.00 I 13.50 1 17.48 1 I 1 3,4 1 1 4.3.1 1 16:9 1 NOTE 1 -These dimensions are derived from the camera aperture dimensions in ANSUSMPTE Standard 59 - “35 mm Camera Aperture Images and Usage”.

24、 NOTE 2 - These dimensions are derived from the camera aperture dimensions in DIN Standard 15502 - 6 Film 35 mm; Image produced by camera aperture and projected image area 1.33: 1. NOTE 3 - These scanned area dimensions are based on current production practice since no standard yet exists. NOTE 4 -

25、These dimensions are calculated for unspliced film. 69 6 (1.2.5) (3.1.3) 16:9 - full screen - 2.5% of image on each side cropped Rec. ITU-R BR.1374-1 FIGURE 1 FuU screen presentation io 4:3 television 43 ?Ir A i (1.2.1) (1.2.2) 1.37:l -full screen- 1.5% of image on each side cropped (1.2.3)(3.1.1) 1

26、.661 -fullscreen- lO.O%ofimageoneachsidecropped FIGURE 2 Letterbox presentation in 43 television I (1.2.4) (3.1.2) 1.66:l - letterbox- 10.0% black areas at top the film image width, if the film aspect ratio is narrower than the television aspect ratio. 73 .I. . ?* 10 Rec. ITU-R BR1374-1 The ?letierb

27、ox ? dimensions are based on: - - the film width, if the film aspect ratio is wider than the television aspect ratio; the film height if the film aspect ratio is narrower than the television aspect ratio. The different presentations on television of the different film aspect ratios results in one of

28、 the following effects on television display: 1) the film image will be cropped on each side; 2) there will be black areas at top and bottom of the film image; 3) the film image will be cropped at top and bottom; 4) there will be black areas at the sides of the film image. The percentage amount of t

29、hese effects are given in Figs. 1-4. 7 Image area and television scanning The scanned areas from film relate to the nominal active picture area of analogue 625-line television systems as determined by the blanking given in Recommendation ITU-R BT.470 - ?Conventional Television systems?, that is a wi

30、dth of 52 ps- For the digital representation of 625-line television systems, based on Recommendation ITU-R BT.601 - ?Studio encoding parameters of digital television for standard 4:3 and wide-screen 16:9 aspects ratios?, it is important to note that the horizontal scanned dimension on film should co

31、incide with the central 702 samples of the ?digital active line? (samples 9 to 7 1 O). 8 Note on the dimensions Historically, many film dimensions were calculated in imperial units. Therefore there may be slight differences between the values given here and those published elsewhere due to conversio

32、n and rounding. However, these are well within the range of normal working tolerances. The values given in this Recommendation have all been calculated in metric units and are consistent. APPENDIX 2 Scanned image areas to be displayed on viewfinders of film camera used in television The scanned area

33、 dimensions indicated in this Appendix can be used as reference values for the markings engraved on the ground glass of the viewfinder of film cameras used for the production of television programmes. 74 Rec. ITU-R BR1374-1 11 The detailed design of such ground glasses depends on the preferences of

34、the user. All ground glasses should desirably reflect both the camera aperture of the film format used, and the maximum scanned area of the chosen television system. In the transition period from the 4:3 to the 16:9 television aspect ratios, viewfinder markings should also desirably reflect the vari

35、ous presentation formats foreseen for the television programme. If the ground glass markings reflect the safe action and safe title areas of the television image, these will depend on the different television presentation formats for which the image is to be exploited and on the broadcasters practic

36、es and preferences on safe image areas. They should also take into account the effect of image cropping in consumer displays. An example of possible ground glass markings is given in Fig. 5. The example applies to a ground glass designed for a Super 16 mm film camera prepared to shoot film expected

37、to be scanned in the 16:9 television aspect ratio. FIGURE 5 Example of ground glass for Super 16 mm film camera marked for 16:9 television scanning I I - L Scanned 16:9 television 1 Comer marks: camera aperture for 1.6:l aspect ratio (12.35 x 7.42 mm) Inner fiame: scanned image area (12.20 x 6.86 mm) 1374-05 75