Mobile TV Devices


TV programmes may be received on mobile phones, portable PCs or portable TV devices. The mobile TV service is delivered to subscribers via mobile telecom networks. South Korea is especially active in this sector, while British Telecom was the first company outside Korea to implement mobile TV. There are some standards used for delivering mobile TV services. A nonexhaustive list is reported below.

• Digital multimedia broadcasting (DMB); terrestrial (T-DMB); satellite (S-DMB): developed in South Korea

• Digital video broadcasting (DVB); for handheld (DVB-H); satellite for handheld (DVB-SH); terrestrial (DVB-T): used in Europe

• MediaFLO (forward link only): a multicasting system developed by Qualcomm (USA); it is an alternative to the two technologies above. DVB-H will probably become the European standard, also in view of compatibility with its terrestrial counterpart (DVB-T). This technology combines the standards of digital video with Internet protocol (IP): it divides the contents in data packets to be transferred to the handheld. However, fierce contenders will be T-DMB and S-DMB. China seems ready to exploit the DMB standard.

At present (April 2008), more than 90% of all mobile TV services rely on existing cellular networks. Indeed, there is still enough capacity in the 3G network and this is what the operators need to have a hot start.

A challenge for device manufacturers will be power consumption: battery life is seriously threatened by the upgraded mobile content and enhanced functions. To date, however, no technical reports on this matter have appeared.

Samsung’s cell phone integrates DVB-H and UMTS, supports videos in MPEG4 (and other formats), has a 2.200 screen, and a 1.0-Ah Li-ion battery. Sony’s portable PC has a 1700 screen and, among other features, a hybrid analog/ digital TV tuner (DVB-T). The G1 player, by the Korean company iNavi, has a digital DMB tuner.

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This article was sent to us by: Renata at 06282010

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