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Refresh_rateThe field rate of an interlaced video image is twice the effective frame rate, since interlacing draws only half of the image (the odd- or even-numbered lines) at a time. For example, a field rate of 60 Hertz will correspond to a 30 frames-per-second moving picture. A field rate can apply to either a video signal, or to a monitor designed to display that signal without conversion.Theoretically, an interlaced signal could have three or more fields per frame, resulting in a field rate that is a 3x or higher multiple of the frame rate. However no such signal is in common use today.Progressive scan monitors do not have a field rate, however they may still display interlaced video by converting each field into a full frame, a process called deinterlacing. In this case, the monitor's frame rate would then likely match the video signal's field rate.
#REDIRECT Refresh_rate
The field rate of an interlaced video image is twice the effective frame rate, since interlacing draws only half of the image (the odd- or even-numbered lines) at a time. For example, a field rate of 60 Hertz will correspond to a 30 frames-per-second moving picture. A field rate can apply to either a video signal, or to a monitor designed to display that signal without conversion.
Theoretically, an interlaced signal could have three or more fields per frame, resulting in a field rate that is a 3x or higher multiple of the frame rate. However no such signal is in common use today.
Progressive scan monitors do not have a field rate, however they may still display interlaced video by converting each field into a full frame, a process called deinterlacing. In this case, the monitor's frame rate would then likely match the video signal's field rate.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Refresh_rateThe field rate of an interlaced video image is twice the effective frame rate, since interlacing draws only half of the image (the odd- or even-numbered lines) at a time. For example, a field rate of 60 Hertz will correspond to a 30 frames-per-second moving picture. A field rate can apply to either a video signal, or to a monitor designed to display that signal without conversion.Theoretically, an interlaced signal could have three or more fields per frame, resulting in a field rate that is a 3x or higher multiple of the frame rate. However no such signal is in common use today.Progressive scan monitors do not have a field rate, however they may still display interlaced video by converting each field into a full frame, a process called deinterlacing. In this case, the monitor's frame rate would then likely match the video signal's field rate.」の詳細全文を読む
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