gsm cell phone TVs). This means that high definition broadcasts are down converted in order to display the image at
of ATSC standard? There are 18 digital television gsm cell phone formats prescribed by the Advanced Televisions Systems Committee. Six are considered HDTV formats (1080p, 1080i,
and 720p). Each format has a different combination of screen 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) 1080p 1080 1920 16:9 Progressive 24 1080p 1080 1920 16:9 Progressive 30 1080i 1080 1920 16:9 Interlaced 30 720p
720 1280 16:9 Progressive 24 720p 720 1280 16:9 Progressive 30 720p 720 1280 16:9 Progressive 60 480p 480 704 16:9 Progressive 24 480p 480 704 16:9 Progressive 30 480p 480 704 16:9 Progressive 60 480p 480 704 4:3 Progressive 24 480p 480 704 4:3 /P> 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 a 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 a TV is made up of individual dots (pixels). The higher the number of pixels, the finer the TV picture becomes. Horizontal pixel measurements using today's technology
a VCR to as much as 500 for a DVD player. Typical digital TV broadcasts have at least 640 pixels. Aspect Ratio Aspect ratio identifies the ratio of the TV screen's width over its height. A 16:9 aspect ratio refers to a wide screen picture format, while a 4:3 refers to a standard TV format. Scan Mode Interlaced scanning is a method that creates a TV picture with alternating lines of information and is the cause for flickering. Progressive scanning is a method that creates a TV picture with consecutive lines of information that results in flicker free picture
Rate Motion picture your TV is generated by a series of still pictures that changes from picture to picture at a very fast rate. This rate is measured by the number of still pictures (frames) displayed within second of time. The higher the frame rate, the smoother the picture displayed. What are the different display technologies used in Digital Televisions? Digital televisions use the
same display technologies available today for analog TVs and computer monitors. They include CRT (Cathode Ray Tubes), LCD (Liquid Crystal Displays), front and rear projection, and PDP (Plasma