I get quite a few questions about HDTV so I will attempt to share some knowledge on the subject.
HDTV or High Definition Television was introduced around 1998. A picture, to be considered High Definition, must have at least 720 lines of resolution that is progressively scanned. Confused yet? Let me explain.
An image is either scanned (viewed on the screen) interlaced or progressively. For an interlaced picture the image is displayed on odd frames only, and then 1/60th of a second later the image is displayed on the even frames. Progressively scanned images are scanned in sequence (top-to-bottom). If that still doesn’t have you confused then you could always try to understand the Kell factor to measure the resolution of a device…
Maybe we should start off slow. First off, you need three things to have HDTV: A monitor that can display the image, a cable that can transmit the image, and a source. To choose a monitor that can display the HD signal is the easiest part of the equation. Just go and get a TV that is labeled as High Definition. Be aware that you can get a High Definition display that maxes at 720p resolution. This is OK but not the best. For those wanting the BEST picture chose a TV that is capable of 1080p. The second part of the equation is also very easy, once you know that it is necessary. Cables that transmit HDTV are: HDMI (High Definition Multimedia Interface), DVI (Digital Video Interface), and Component (three jacks that are broken down with a blue, a green, and a red connector for the video transmition and often include two more cables for audio in a red and white.) Finally, you will need to subscribe to, or connect to a High Definition source. Some examples are: Blu Ray, HD-DVD, cable companies and satellite company’s programming that is broadcast in high-definition, or OTA HD signals.
What about 1080i???? Some sets are capable of transmitting up to 1080i. This is also a High Definition image as well. Although some people prefer the 720p over 1080i signal, any monitor worth it’s weight that can produce a 1080i signal can also produce a 720p signal.
A few more points. You DO NOT have to spend tons of money on connector cables. Don’t listen to the Best Buy salesman and blow your money on a $100 HDMI cable. You should be able to get a good quality , HDMI cable for under $30. Also: There are many different HDMI versions. 1.0, 1.1, 1.2, 1.3, 1.3a, 1.3b so on and so forth. The only thing you will need to worry about is that your cable is 1.3. the 1.3, 1.3a, 1.3b differences are for manufacturers and testing and should provide the end user with no noticeable quality differences in picture and sound. ALSO: HDMI is the way to go. Component is still an analog connection and DVI requires a separate method of transfer for the audio.
HDTV is here to stay, in fact, the screen resolutions are going to increase further. Expect to see 2K, and 4k resolutions in the future. For now though it is a safe bet to educate yourself and move away from analog sets. Once you start enjoying HDTV there is no doubt in my mind that you will stop watching non-HD.
Stay tuned…