Journal of the Society of Motion Picture and Television Engineers (1950-1954)

VI.jREFERENCES FCC Public Notice 49-948 of July 11, 1949. FCC Public Notices No. 50-1064 and 50-1065 of Sept. 1, 1950; FCC Public Notice No. 50-1225 of Oct. 11, 1950. P. G. Goldmark, J. W. Christensen and J. J. Reeves, "Color television — U.S.A. Standard," Jour. SMPTE, 57: 336-381, Oct. 1951. A. V. Loughren and C. J. Hirsch, "Comparative analysis of color TV systems," Electronics., 24: 92-96, Feb. 1951. A. V. Bedford, "Mixed highs in color television," Proc. I.R.E., 38: 10031009, Sept. 1950. K. Mcllwain, "Requisite color bandwidth for simultaneous color-television systems," Proc. I.R.E. 40: 909-912, Aug. 1952. 7. F. Gray, U.S. Patent 1,769,920; filed Apr. 30, 1929; issued July 8, 1930. 8. P. Mertz and F. Gray, "A theory of scanning and its relation to the characteristics of the transmitted signal in telephotography and television," Bell Sys. Tech. J., 13: 464-515, July 1934. C. J. Hirsch, W, F. Bailey and B. D. Loughlin, "Principles of NTSC compatible color television," Electronics, 25: 88-95; Feb. 1952. 6. 9. 10. C. S. Szegho, "Color cathode-ray tube with three phosphor bands," Jour. SMPTE, 55: 367-376, Oct. 1950. E. W. Herold, et al ; "Direct-view color kinescopes : a series of eleven papers," Proc. I.R.E., 39: 1177-1263, Oct. 1951. D. G. Fink, "Phosphor-strip tricolor tubes," Electronics, 24: 89-91; Dec. 1951. L. C. Jesty, British Patent 443,896; application date Oct. 6, 1934; issue date Mar. 10, 1936. Additional References D. G. Fink, "Alternative approaches to color television," Proc. I.R.E. 39: 11241134, Oct. 1951. W. T. Wintringham, "Color television and colorimetry," Proc. I.R.E. 39: 11351172, Oct. 1951. B. D. Loughlin, "Recent improvements in band-shared simultaneous color-television systems," Proc. I.R.E., 39: 12641279, Oct. 1951. N. Marchand, H. R. Holloway and M. Leifer, "Analysis of dot-sequential color television," Proc. I.R.E., 39: 1280-1287, Oct. 1951. R. B. Dome, "Spectrum utilization in color television," Proc. I.R.E., 39: 1323-1331, Oct. 1951. APPENDIX: Revised Specifications for Field Test of NTSC Compatible Color Television Test Specifications — Group I 1. The image is scanned at uniform velocities from left to right and from top to bottom with 525 lines/frame and nominally 60 fields/sec, interlaced 2-to-l. 2. The aspect ratio of the image is 4 units horizontally and 3 units vertically. 3. The blanking level is fixed at 75% (±2.5%) of the peak amplitude of the carrier envelope. The maximum white NOTE: These revised specifications were formally released on Feb. 4, 1953, by W. R. G. Baker, Chairman of NTSC, c/o General Electric Co., Electronics Park, Syracuse, N.Y., with the advice that a comprehensive field test would soon be inaugurated. Dr. Baker will welcome comments. (luminance) level is not more than 15% nor less than 10% of the peak carrier amplitude. 4. The horizontal and vertical synchronizing pulses are those specified in Sec. 3.682 of Subpart E of Part 3 of the FCC Rules Governing Radio Broadcast Services (as amended April 11, 1952; effective June 2, 1952), modified to provide the color synchronizing signal described in Specif. 21 (Group II of these specifications). 5. An increase in initial light intensity corresponds to a decrease in the amplitude of the carrier envelope (negative modulation). 6. The television channel occupies a total width of 6 me. Vestigial-sideband A. V. Loughren: Color Television 333