By analogy with computer monitors, any video signal is characterized by vertical and horizontal resolution. It is measured in pixels. The European standard for image sharpness is 720x576 pixels. This resolution is obtained after digitizing the analog video. In the expression 720x576, the first number denotes the horizontal resolution of the video (the number of dots per line), the second - vertical (the number of active lines that are involved in image construction). Also 720x576 pixels is the maximum clarity for the DVD format.
The higher the number of pixels, the better the image.
The high definition
video format is called
HD (High Definition). Its advantages can be appreciated by watching videos and films from screens with a large diagonal. It is with the advent of large-scale liquid crystal and plasma panels that the HD format is in demand more than ever. HDTV (High Definition Television) is broadcast in two standards. The video resolution of one of them is 1920 × 1080 pixels, the second - 1280 × 720.
For three-dimensional video, the resolution is 512x512x512. It is measured in
voxels. These are image elements, dots in
three-dimensional space.
When choosing a television plasma or liquid crystal panel, you should pay attention to the marking. If the technical passport states that the receiver supports HD-Ready broadcast, then an image of 1024x768 pixels will be transmitted from the screen. Only Full-HD marking means support for video resolutions of 1920x1080 square pixels. If you are planning to watch a movie or clip from a computer screen, it is necessary that both the display and the video card support the protection of media content - HDCP. In most cases, modern LCD monitors do an excellent job of this.
High-definition video media supports two formats. This is a Blue-Ray and HD DVD. Externally, they are no different from regular DVDs. The difference is in the amount of information that fits on these media. In the HD
DVD format,
optical discs are available in one, two, less often three-layer
discs . Each of the layers can accommodate up to 15 GB of information. But Blue-ray wins in the battle of formats. Only one layer of such an optical disc is capable of carrying up to 33 GB. At the same time, back in 2009, a ten-layer Blue-Ray format carrier was introduced on the market. However, these discs did not receive mass distribution either in Russia or in Europe. The reason for this is the high cost of video players and a number of other shortcomings.
Video resolution of 1920x1080, 1280x720 pixels does not reproduce many portable devices - this is both mobile phones and tablets. To watch movies and videos on them, you need to change the resolution of the video. This can be done using converter software. They are presented in sufficient quantities on the Internet. It is better to choose a program that converts to the largest number of formats. It will also be useful to have presets - ready-made settings for this or that device. That is, choosing the right model in the menu, there will be no need to set codecs, frame rate, etc.
Let's give a little advice. Remember, video conversion is a rather lengthy process, and if you are going on the road, prepare your files in advance.