视频广播电视标准
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视频广播电视标准
Most countries around the World use one of three main television broadcast Standards. These three main standards are NTSC, PAL and SECAM. However, each standard is
not compatible with the other. The charts below give a description of each standard and the technical variations within each.
NTSC制式
The first colour TV broadcast system was implemented in the United States in 1953. This was based on the NTSC (N ational T elevision S ystem C ommittee) standard.
NTSC is used by many countries on the American continent as well as many Asian countries including Japan. NTSC runs on 525 lines/frame.
SYSTEM NTSC M
Lines/Field 525/60
Horizantal Frequency 15.734 kHz
Vertical Frequency 60 Hz
Colour Subcarrier Frequency 3.579545 mHz
Video Bandwidth 4.2 mHz
Sound Carrier 4.5 mHz
PAL制式
The PAL (Phase Alternating Line) standard was introduced in the early 1960's and