A letter dtd. Jun. 27, 1980 to R. S. Hopkins from S. N. Baron describing use of 13.5 MHz, described at p. 3, lines 24-32, of the parent specification. |
SMPTE Journal, vol. 85, Mar. 1976, pp. 141-145, article entitled "PCM NTSC Television Characteristics". |
SMPTE Journal, vol. 88, Aug. 1979, pp. 550-554, articles entitled "Low Bit-Rate System for Digital Coding of the Television Picture". |
German language Nachrichtentechische Zeitschrift (NTZ), Nov. 6, 1971, pp. 321-325, article entitled "Moglichkeiten der Farbfernsehsignaleng", (Possibilities of Digital Coding and Transmission of Color Television Signals). |
A letter dtd. Oct. 8, 1980 by Frank Davidoff described at p. 3, line 32 of the specification (parent), Western Electric Technical Digest, No. 26, Apr. 1972. |