| By :
Andy Grant
What is HD and do you really need it for your next presentation? HD stands for "high definition" and, as the name implies, refers to the image quality of television or video. HD TV is a type of television signal, broadcast in the 16:9 aspect ratio (as compared to NTSC's 4:3 aspect ratio). HDTV resolutions are increased from 640 x 480 to either 1922 x 1080 (or 1080i) or 1280 x 720 (or 720p). Because the HDTV signal is digital (rather than analog), the signal can carry huge amounts of information, including full digital audio with multiple channels. Many television viewers prefer HD because of its vivid, lifelike imagery. Additionally, HD viewing offers the ultimate showcase of the finest details. Finally, the aspect ratio of HD viewing mirrors that of traditional film. Whether or not you need HD for your next speaking presentation depends on the nature of the material you're presenting. The more detailed your presentation images, the more appealing (and necessary) HD becomes. Got complex graphics? Detailed imagery? Some examples of presentations requiring HD might include: photography training, video editing, detailed charts and graphs, statistical data, film and entertainment industry, high-profile presentations (where it pays to impress by going the extra mile), etc. Likewise, if you are incorporating movie clips (or perhaps plan to play a DVD with your projector), then HD is definitely an added bonus. Your audience is another factor in determining whether or not you need HD technology. How large is your audience? How close will they be seated to the projection screen? What kind of lighting is available in the room? How familiar are the attendees with the material you're presenting? Keep in mind that HD provides more detail -- of everything. If your audience is large, spread out, far from the screen, has limited vision, or the room is dimly lit, it may make sense to choose the HD option. Finally, consider what kind of image you are choosing to project. High definition viewing appears more professional, more polished, more credible. If your goal is to impress your audience or to project a certain air of professionalism or authority, HD may be the logical choice for your presentation. Once you consider all of these questions, it should become evident to you whether or not HD is required in your presentation. If you choose to rent a projector, be sure to ask whether it is HD compatible if you plan to present in HD.
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