The 7 Best Technologies Of The Colour Television

Land application of digital television broadcasting in Live TV

countries in the developing world are strongly field for digital broadcasting (DTTB), digital terrestrial television broadcasting using the latest digital TV terrestrial transmission has the following characteristics: high transmission capacity. 8MHz channel can be transmitted to more than 20Mbps of data, some percentage of modulation increased payload of up to 33Mbps, to meet the transport of HDTV and SDTV sets of requirements, has good resistance against multipath and Doppler shift frequency characteristics in various environments strong anti-interference. The digital terrestrial television transmission commonly used for error correction and techniques more advanced modulation signal to the receiver a variety of conditions and environments reliable signal, anti-static multi-path (environment receptor work buildings, only a simple antenna can be used to give the normal reception) and multiple dynamic interference (sports environment capable of receiving, in the case of the speed to 150 km per hour, can be stable for the reception), and resistant to various pulse jamming devices devices. The role not only for fixed receivers and applies also to talkies, those who travel by car and by train through the mobile phone, PMP (portable media players), PDA (Personal digital assistants) and laptops and other reliable access terminals receiving real-time multimedia information services, also TV frequency is rich in resources, quality, determine the terrestrial digital television transmission technology has a good application and development of market. Terrestrial digital television broadcasting agreements: DVB-T, DVB-H, DAB, ISDB-T and national DMB-T/ADTB-T/TiMi fact, I still digital television technology terrestrial transmission in the field of live television from their point of view.

The digital terrestrial television transmission today TV live mainly in the application in microwave digital cameras and microwave transmission, the following I highlight news on TV more current household system trucks mobile broadcast transmission of microwaves.

A technical description of microwave systems
1. Using new standards trucks national mobile television technology used in microwave transmission technology based on digital terrestrial television transmission, but using a different standard. Some companies adopt the European DVB-T standard, some companies use the GB20600-2006 "for terrestrial digital broadcasting framework TV system, channel coding and modulation techniques for single carrier modulation, and the company used is GB20600-2006 for the digital terrestrial television broadcasting within the system, channel coding and modulation technique for multi-carrier modulation, other manufacturers mostly used similar modulation techniques. Digital terrestrial TV with modern technology to produce digital terrestrial interference performance with strong support receiving benefits rapidly evolving to overcome all kinds of multipath interference, you can send and receive sides of the failure to complete the transmission of light.

2. New mobile broadcast trucks used by radio frequency

car line microwave frequency 300 MHz to 10 GHz frequency is too low, although the ability of diffraction, but sensitive to interference in the big cities is hard to find available frequencies, the frequency is too high, although the frequency of easy to find, but the transmission of electromagnetic waves capacity decreased significantly, in a protected environment, do not travel very away, then the best choice of available frequency range of low frequency. Because different parts of the electromagnetic spectrum, the environment, before use, The first test use of good local frequency, which corresponds to the issuer, the bandwidth of the transmitter output is generally 8MHz, 300MHz range adjustment in general, some aspects of plant equipment in the establishment of step frequency can be adjusted in units of 1MHz, aspects of plant equipment in step frequency setting is set units 8MHz, 1MHz best adjustable device can overcome a similar frequency interference from the outside to fully utilize the valuable spectrum resources. As soon as a, 80MHz in the band around the antenna, the change both in the frequency range is meaningless, except a little more with a different Vice-frequency antennas. In the frequency of use, city services using a large amount of radio frequencies, the frequency range occupied by the band outside the traditional TV channels can be used hard find, on the current use of 1.2 GHz frequency internal mobile TV stations in more vehicles. About the Author

I am Cheap On Sales writer, reports some information about batik wall hanging , wooden switch plates.

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