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Motion Picture Film, Z22.22-1947, Delete paragraph 2 and footnote.
Emulsion and Sound Record Positions in Camera for 16mm Sound Motion Picture Film, Z22. 15-1 946, Delete paragraph 2, footnote and reference to guided edge. Also delete paragraph 3, but the technical substance of this paragraph is considered suitable for incorporation in a more suitable place. Add identification of sound record (shaded area).
With regard to Z22. 16-1 947, the working group decided that at present it did not seem desirable to consider this for international adoption since prints were made with the emulsion position on either side and there was little likelihood of universal acceptance of a single standard at this time.
The working group discussed at some length the question of projection speed of 24 or 25 frames per second, but did not reach any decision.
Dimensions and Locations for Sound Records and Scanning Area
Work Group 4 recommended that five American Standards be prepared by the secretariat for circulation as Draft ISO Proposals, two without change :
Z22.69-1948, Sound Records and Scanning Area of Double-Width Push-Pull Sound Prints, Normal Centerline Type,
Z22.70-1948, Sound Records and Scanning Area of Double-Width Push-Pull Sound Prints, Offset Centerline Type ;
and three with the modifications indicated below:
Z22.40-1950, Dimensions and Locations for Sound Records and Scanning Area of 35mm Sound Motion Picture Prints
(1) The distance from the edge of the film to the centerline of the sound record shall be changed from 6.17 ±
0.02 mm to 6.19 ± 0.02 mm (0.244 ± 0.001 in.).
(2) The distance from the edge of the film to the inner edge of the printed area shall be changed from 7.75 ± 0.05 mm to 7.83 ± 0.05 mm (0.308 ± 0.002 in.) . (This change was proposed by the French delegate on the basis that difficulties are being experienced in France with a white line between sound track and picture printed areas. The United Kingdom delegation reserved judgment on the dimension in (1) and (2) above, but approves the circulation of the draft.)
(3) In the specification "Distance between sound and corresponding picture" change "20 ± J frames" to "21 frames ± ± frame." (When the distance from the center of the projector gate to the sound scanning point is 20 frames, the picture and sound will be in synchronism for an observer at a distance of 50 feet, and with French practice, which is based on a measured distance of 21 frames between picture and sound on the film itself, and therefore allows for synchronizing the picture to suit an average audience size.)
(4) Delete the third footnote.
(5) Delete the dimension and all reference to the height of the scanned area.
Z22.41-1946, Sound Records and Scanning Area of 16mm Sound Motion Picture Prints
(1) Change the tolerance on the width of the sound record for full width variable-density record from 0.080 ± 0.001 in. to 0.080 ± oiooi in.
(2) Delete the present footnote.
(3) Add a new footnote reading: "The width of the 16mm sound record is derived by reducing the corresponding 35mm dimensions by a ratio of 1.2 to 1.0 in.
(4) Add a new paragraph : "Distance between sound and corresponding picture — the sound record shall pre
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October 1952 Journal of the SMPTE Vol. 59