15. luma represents the brightness in an image Luma is typically paired with chroma Luma represents the achromatic image without any color, while the chroma components represent the color information CHROMA AND LUMA
17. Conventional CRT sets display around 480 visible lines of pixels. Analog pictures are interlaced Converting video to analog format lowers its quality worst computer monitors have more resolution than the best analog TV The best computer monitors are able to display up to 10 times more pixels than that TV set WHATS WRONG WITH ANALOG TV
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19. Different frequency for digital broadcast Each broadcaster has an analog TV channel and a digital TV channel A broadcaster can send a single program at 19.39 Mbps A broadcaster can divide the channel into several different streams DTV
20. 480i - The picture is 704x480 pixels, sent at 60 interlaced frames per second (30 complete frames per second). 480p - The picture is 704x480 pixels, sent at 60 complete frames per second. 720p - The picture is 1280x720 pixels, sent at 60 complete frames per second. 1080i - The picture is 1920x1080 pixels, sent at 60 interlaced frames per second (30 complete frames per second). 1080p - The picture is 1920x1080 pixels, sent at 60 complete frames per second. Different formats