Film Glossary/1 – 9
¼”. Magnetic tape, ¼” wide, used to record sound on stage or on location on a Nagra or other sound recorder.
¾”. Common term for ¾” wide U-matic videotape format.
1:1. See dupe or work track.
1080i. High definition broadcast format where 1080 interlaced scan lines are visible to the viewer.
180 degree rule. See crossing the line.
24 track. See multitrack.
24b. 24 bits of audio. Bits(bit depth) measure the number of bits you have to capture audio.
24p. Progressive scan digital tape that runs at 24 fps.
2K. 2048 horizontal pixels: Quality and amount of data resulting from scanning film negative to a file. A 2K file is the minimum amount of data necessary for color correction, title, image manipulation and other finishing work. 2K is used for the majority of postproduction finishing work of the finishing work where digital intermediaries are used. See also digital intermediary.
2-pop. See sync pop.
3 perf. Three perforations per 35mm film frame as opposed to the normal 4 perfs. The image area is the same but 3 perf uses less film stock: 1000′ plays in 14 minutes instead of 10. Since 3 perf cuts down on film stock and re-loads on the set and thereby saves money, it is frequently used for shooting TV in Hollywood. Post production software can handle 3 perf but three different pulldown sequences must be noted and checked.
3:2 pulldown sequence. Sequence of film frames that is transferred to tape time code fields during telecine.
3D effect. Blending layers of shots together on an X,Y,Z axis into one shot so that it appears to have three dimensions: height, width, and depth.
4:2:2. The ratio of the luminance sampling frequency (4 or the first number) to the two different color sampling frequencies (2 in this case or the second and third numbers) employed during the digitizing of component video. Other ratios are: 4:4:4, 4:2:2:4, and 4:4:4:4; the latter two added a key channel. Ratios with twos are compressed; without are uncompressed.
4:4:4. The ratio of the luminance sampling frequency (4 or the first number) to the two different color sampling frequencies (4 in this case) employed during the capturing or rendering of media. Other ratios are: 4:2:2, 4:2:2:4, and 4:4:4:4; the latter two add a key channel. Ratios with twos are compressed; without are uncompressed.
480. SD broadcast format defined by the 480 scan lines visible to the viewer.
4K. 4096 horizontal pixels: Quality and amount of data resulting from scanning film negative to a file. Since a 4K file carries more data than a 2K, it requires more storage and is not practical in every day post finishing processes. 4K data files are used mainly in film restoration where enhanced image clarity and improved picture details are warranted. See also 2K data.
5.1. The most up-to-date surround sound. 5.1 is configured with five channels: left, right and center in the front plus left and right surrounds. See also Dolby digital.
7:1. Same as 5.1 with the addition of left rear and right rear surrounds. See also Dolby digital.
720p. High definition broadcast format where 720 progressive scan lines are visible to the viewer.