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Film Industry Objects to Fractional Frame Rates
Fractional frame rates were introduced during the analog NTSC era to make color television backwards compatible with black-and-white receivers. The most significant fractional frame rate usage was for films mastered in 24fps because "in order to convert the 24fps to 29.97fps (NTSC), down to 23.976fps, and then converted to 29.97fps with a 3:2 pull down process". Using this technique 23.976, 29.97, and 59.94fps were used to create 24.00, 30.00 and 60.00 fame rates.
According to the NTSC, the process causes higher production and distribution costs, out-of-sync video/audio, unnecessary complexity, and is slowing adoption of HFR (High Frame Rate). An NTSC industry coalition recently said.
- "In 1953 a new NTSC (National Television System Committee) standard was adopted which allowed for broadcasting in color while also being compatible with the then existing stock of black-and-white receivers. The idea was to carry color information via a sub-carrier only the former would recognize. One problem emerged: the bandwidth used by the color sub-carrier could interfere with the audio signal and cause inter-modular beating. In order to avoid this issue, it was decided to reduce the frame rate by 0.1%," the industry coalition NoMore2398 explained.
(This content for this article came from FlatpanelsHD)
Fractional frame rates were introduced during the analog NTSC era to make color television backwards compatible with black-and-white receivers. The most significant fractional frame rate usage was for films mastered in 24fps because "in order to convert the 24fps to 29.97fps (NTSC), down to 23.976fps, and then converted to 29.97fps with a 3:2 pull down process". Using this technique 23.976, 29.97, and 59.94fps were used to create 24.00, 30.00 and 60.00 fame rates.
According to the NTSC, the process causes higher production and distribution costs, out-of-sync video/audio, unnecessary complexity, and is slowing adoption of HFR (High Frame Rate). An NTSC industry coalition recently said.
- "In 1953 a new NTSC (National Television System Committee) standard was adopted which allowed for broadcasting in color while also being compatible with the then existing stock of black-and-white receivers. The idea was to carry color information via a sub-carrier only the former would recognize. One problem emerged: the bandwidth used by the color sub-carrier could interfere with the audio signal and cause inter-modular beating. In order to avoid this issue, it was decided to reduce the frame rate by 0.1%," the industry coalition NoMore2398 explained.
(This content for this article came from FlatpanelsHD)
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