• HDTV-implemented three conditions
In this article before you continue, I briefly as we briefly explain what is the true high-definition television, want to achieve high-definition display, three conditions must be reached. First: the TV source must reach national 1920 × 1080i high definition. Second: the transfer process to ensure high definition transmission standards, such as installing a set-top box, through the component or HDMI connector on the TV. Third: you will need to purchase more than one line with 720p-definition 16: 9 flat panel TV. The above three aspects are complementary to the display of an HD signal.
4: 3 broadcast HD spring deformation of
But yesterday, CCTV HD channels failed to meet the high definition display the reason lies in the first line of the unsanitary, its use and general channel the same 4: 3 ratio of standard definition shows the source for transmission, while still using MPEG2 MP @ HL high-standard compression transmission mode, but it is also the best ones will be through HD and SD compression, transmission, and ultimately see picture is just a picture quality loss less SD picture quality, do not know what to say everyone can understand. And the best proof is the program of distortion, this is because the 4: 3 film sources at the time of the adoption of high definition encoding transfer back into a 16: 9 screen, so the image distortion.
● CCTV HD broadcast high definition programmes cannot be synchronized?
Today morning, CCTV HD channels have yesterday's replay playback Spring Festival evening show, picture clarity to 1920 × 1080i and restored the image ratio 16: 9 HD-ratio of normal. So it can be cited out, it is possible that the CCTV HD channels will not be able to live in HD, but only through RSS or replay of ways.
So let's first look at the morning CCTV HD channels the replay of high-definition picture is taken, the Spring Festival evening we can play of yesterday and the Spring Festival evening scene for comparison.
CCTV HD channel yesterday live pictures (click to enlarge view recommended)
CCTV HD channel today the replay screen (click to enlarge view)
CCTV HD channel yesterday live pictures (click to enlarge view recommended)
CCTV HD channel today the replay screen (click to enlarge view)
From the above comparison chart can be seen, today's high-definition video replay spring than last night live on a grade, in terms of colour, detail and other characterizations are reaching high-definition standards, but last night's broadcast was disappointing, from here we can see that the CCTV HD channels of high-definition broadcast.
In fact this is the program source different distinctions between the ordinary SD yesterday evening program source through high-definition transmission is still not reaching the standard SD standards, and today replaced high-definition signal source, bring our only shock, this also allows the author to future Olympic Games is also only available through the replay to enjoy a true 16: 9 high definition screen.
• Replay Edition HDTV Spring Festival evening show more appreciation of real film effect
● Write in the last
High-definition picture is brought to enjoy pleasant widescreen vision with eye viewing habits, and even more true colors is also pursued by many friends. At the same time with Dolby sound effects program than ordinary program results better, this is consumer spending money to buy a set-top box to watch HDTV programs.
From CCTV HD channels by the Spring Festival evening show replay scenes, effects fully meet the needs of our high-definition, but in the ointment is that this requires replay, if the Olympic Games is in this way to reproduce high definition images, some disappointing.
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