To begin to understand what will be discussed, talk about existing standards. The standard resolution of 720×576 (PAL) and 720×480 (NTSC) ratio is 16:9, stream television went to 4:3, for this we had black bars top and bottom or full screen, but trimmed. Here we have a lot of years looking and the quality is quite satisfied. But with the advent of large-screen TVs (really want ) and the other "functional" work, began to experience problems with the clarity. I think they were all trying to stretch a small picture to the big screen, the result is deplorable. here is a small example for clarity.
That center, our true size which we are accustomed to. And the edges of the various attempts to stretch. Why does the store look beautiful, and home when put instead of "old man" full of horror. now let us look at this question, where is the catch.
The answer is very simple. That would normally look at these big modern television, invented the standard HD, meaning: High Definition - high resolution. Uses standard 720p and 1080i, 1080p
Let's see what is interlaced and progressive scan. Who wants to find out more, visit this topic
signal Receiver (TVs, monitors, than see the picture):
signal Sources (DVD, cable, satellite, what gives on viewing):
For signal transmission uses the technology of digital television (DVB):
Used video codecs: MPEG-2, MPEG-4 H. 264/AVC and VC-1 sound: Dolby Digital, Dolby Digital Plus, DTS, DTS-HD and Dolby Lossless. When you buy DVD that plays HD quality, pay attention to labels (supporting codecs).