In the mid-1960s, three color television standards competed for adoption in Europe: NTSC, SECAM, and PAL. NTSC, developed in 1953, faced issues with phase-dependent color accuracy. SECAM, introduced in 1956, utilized frequency modulation to ensure signal stability over long distances. PAL, created in 1962, aimed to maintain NTSC compatibility while correcting phase errors.
The Soviet Union had experimented with three internal systems: a mechanical disc system, the NTSC-based OSKM, and the NIIR system. By 1965, the USSR opted for a collaboration with France to adopt the SECAM standard. This intergovernmental agreement, signed on March 22, 1965, provided the USSR with technical documentation and credit for color tube production without licensing fees.
The geopolitical landscape heavily influenced the standardization process. French President Charles de Gaulle viewed SECAM as a symbol of national independence. By securing the Soviet Union's support, France aimed to influence the Eastern Bloc and challenge the dominance of the PAL standard, which was favored by West Germany and eventually adopted by the United Kingdom.
Technical differences between the systems included varying line counts, field rates, and audio carrier offsets. For instance, the Soviet D/K standard used a 6.5 MHz audio offset, while Western European B/G systems typically used 5.5 MHz. These broadcast standards defined the radio channel width and modulation methods, complicating the creation of a unified European television market.
The International Radio Consultative Committee (CCIR) held conferences in Vienna in 1965 and Oslo in 1966 to reach a consensus. During the 1965 Vienna meeting, 22 delegations supported SECAM, 12 favored PAL, and 6 backed NTSC. Despite these efforts, the lack of a unified technical choice highlighted the dominance of political and diplomatic interests over engineering preferences.
