Digital broadcasting information
Terrestrial digital broadcasting broadcasting
The terrestrial digital broadcasting was begun in Tokyo, Osaka, and Nagoya in December, 2003. The terrestrial digital broadcasting can broadcast high sound quality by the high-resolution by compressing the image and the signal of the voice. Moreover, data broadcasting, one-segment broadcasting, and electronic program guide (EPG), etc. can be used.
The analog broadcasting ends, and it becomes a terrestrial digital broadcasting broadcasting in July, 2011. The broadcasting method changes greatly though it is extent felt that the image of the television became beautiful a little for a general person.
The form of the electric wave changes greatly from the analogue to digital, too. It is not possible to see like being analog of the receiver.
BS digital broadcasting
The BS digital broadcasting began by using the BS satellite in NHK in December, 2000. After the satellite broadcasts had started by the BS analog form in 1989, about 11 years were the analog broadcastings.
BS becomes digital, a pay broadcasting is broadcast by seven channels of the commercial broadcast besides BS-1 of NHK, BS-2, and the digital Hi-Vision broadcasting, and 12 channels of two channels in total are broadcast.
The feature of the digital technique that a lot of information can be sent at a time by the compression of the image and the signal of the voice has been made the best use of.