From the era of radio, which has been developing more and more until it produces television. Television in early television, there will be a small screen image is in black and white is not a color image as in the current era. Early television was developed by Paul Gottlieb Nipkow name of Germany and British television has broadcast for the first time in the year 1930, and subsequently it has been invented, has developed a colour TV signal by using the Analog system after the system is Analog digital era to today. Best image sharpness has been developed continuously to the HD era.
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