in order large screen tv to display the image at 480 lines. What are the 18 formats of ATSC standard? There are 18 digital television formats prescribed by the Advanced Televisions Systems Committee. Six are considered HDTV formats (1080p, 1080i, and 720p). Each format has different combination of resolution, scan mode, frame rate, and aspect ratio requirements. ATSC Picture Display Format Format Vertical Scan Lines Horizontal Pixels Aspect Ratio Scan Mode Frame Rate (fps)
Progressive 30 480p 480 704 4:3 Progressive 60 480p 480 640 4:3 Progressive 24 480p 480 640 4:3 Progressive 30 480p 480 640 4:3 Progressive 60 480i 480 704 16:9 Interlaced 30 480i 480 704 4:3 Interlaced 30 480i 480 640 4:3 Interlaced 30 Vertical Scan Lines Vertical scan lines refer to the number of horizontal
lines television can display to create an image. As the number of lines increase, more information is displayed, resulting in better picture quality. Traditional analog TVs can display approximately 480 lines, while high definition television can display up to 1080 lines. Horizontal Pixels Each horizontal line in is made up of individual dots (pixels). The higher the number of pixels, the finer the picture becomes. Horizontal pixel measurements using today's technology can range from 250 for VCR to as much as 500 for DVD player. Typical digital broadcasts have at least 640 pixels. Aspect Ratio Aspect ratio identifies the ratio of the screen's width over its height. 16:9 aspect ratio refers to wide picture format, while 4:3 refers to standard format. Scan Mode Interlaced scanning is method that creates picture with alternating lines of information and is the cause for flickering. Progressive scanning is method that creates picture with consecutive lines of information that results in flicker free picture quality. Frame Rate Motion picture on your is generated by series of still pictures that changes from picture to picture at very fast rate. This rate is measured by the number of still pictures (frames) displayed within one second of time. The higher the
displayed. What are the different display technologies used in Digital Televisions? Digital televisions use the same display technologies available today
(Liquid Crystal Displays), front and rear projection, and PDP (Plasma Display Panels). Most digital TVs
large screen tv CRT maintains an advantage over projection technologies with wider viewing angle that makes it more suitable for living room viewing. How is HDTV/EDTV/SDTV different from HDTV/EDTV/SDTV Monitor? In order to receive digital broadcasts, digital decoder must be used to receive and decode digital broadcast signals. Digital decoders can be built
television itself or they may come in the form of set top box that
is added separately to the