HDTV: Power of Perception
By Anne Ahira
Somewhere between the picture and the audio lies a magic that cannot be destroyed when you know the secret. This is magic that the world’s greatest magicians could never replicate and it is show on the screen of television.
Through new innovations, there are newer and more exciting ways to view the world. High Definition Television (HDTV) is the magician and the media of the world is its stage.
The illusions are the images and the viewer’s perception is changed. As it stands, we view the world through our televisions in analog, although it is sent to our televisions in a digital format. The image is converted into analog and is shown in half the quality that it is capable of. However, soon, this will all change.
Most networks are now transmitting in DTV, or digital video. The allowance is there for better quality of video and audio, but only if you have an HDTV to view it at its best.
This is why the perception is changing. While DVDs are digital video, the DVD players must convert them to analog to view them properly. With HDTV, that conversion is not needed.
However, HDTV is not the same as DTV, or digital video, it is simply a bi-product of DTV. Digital video allows for two different types of image compatibility. The low quality is SDTV, which is equal to the highest quality of analog video, and the high quality is HDTV.
The pixel resolution for HDTV is approximately 1920X1080 pixels per square inch and has a frame rate of between 24 frames per second, progressive to 60 frames per second, progressive.
This essentially means that the image can be clearer without actual degradation of the signal and move at a higher speed without skipping, jumping, or synchronization issues with the audio. This gives you a clearer image and more reliable audio.
However, not everything is formatted for HDTV. Most DVD movies are not formatted for High Definition and, while they still play on an HDTV, the quality of the image is not as clear and crisp as the manufacturers advertise.
The reason for this is the difference between digital video and HDTV. On a lower quality SDTV, you will have a beautiful image that is clear and perfect, because, while the frame rate is the same, as is the aspect ratio, the pixel size is not the same.
The pixel size on a SDTV is the same as the pixel size on an analog television, which is approximately 704X480 pixels per square inch. This difference in pixels means that the SDTV can still show images that are from analog devices without the drop in image quality.
Some HDTV manufacturers have taken this into consideration and added an SDTV connector that converts the images to provide better quality visual perception and maintain the HDTV quality audio, as well. You can find an HDTV of any format, as well as SDTV formats, in any retail electronics store, as well as at online markets, like Amazon.