After cell phone jammer is used for the signal shielding

 Various distribution channels description. Study of different market channels. Different parts of the channel

difference. Consumer channel selection, and finally the concluding part of the summary of this paper analyzed the problem. Channels the theoretical foundation. Channels the theoretical foundation.

The concept of distribution channels, the so-called distribution channels. After cell phone jammer is used for the signal shielding. 
Each digital channel can be divided into several sub-channels, which can either use a data stream - 19.39 megabytes per second, can also be divided into several shunt, for example 4, each speed is

that every seconds to 4.85 megabytes. The transmission speed of 4.85 megabytes per second, while the sharpness of the image greatly reduced, but it can greatly increase the types of information to

meet different needs. For example, when the broadcast of a sporting event, the audience need a high-resolution images, the television should be a spread of 19.39 megabytes per second; during a news

broadcast, the audience pay attention to the news content instead of the announcer's image , so no need to use so high clarity. cell phone jammer will make the cell phone invalid.
At this time only 3 megabytes per second speed, and the remaining 16.39 trillion bytes can be used to transmit other content. Digital TV, two-way information transmission technology, the ability to

interact with, given the TV a lot of new features, so that people can be in accordance with their needs for a variety of network services, including video on demand, online shopping, distance

learning, remote medical and other new business, which enables the TV to become a true information appliance. 2.4.2 IPTV - interactive web TV, interactive Internet TV IPTV, interactive Internet TV

is a broadband cable networks, the Internet, multimedia, communications and other technology in one. cell phone jammer emits the specific electromagnetic signal.
New technologies, including digital television, including a variety of interactive services to home users. The user at home, there are two ways to enjoy IPTV services: computer and network set-top

box + regular TV. IPTV is different from traditional analog cable TV, and also different from the classical digital television. And did not touch the media, traditional and classic digital TV has a

frequency-point scale, timing, one-way broadcasting; classic digital TV for analog TV, many technologies leather, but only the change of the signal form mode of transmission of the the contents of.

IPTV is a computer or set-top box + TV to receive video on demand programming, video broadcasting and Internet surfing functions. cell phone jammer can also be used to prevent the students in the

school using the cell phone.