If American specialists conducted comparative tests of their system not only in a laboratory, but also in a real city, they would hardly have discovered the advantages of the ATSC standard. Indeed, in terms of quality, both ATSC and DVB-T deliver to every viewer the same studio quality that is produced by the leading television companies. In this respect, it is pointless to compare these standards. DVB-T, like ATSC, includes high-definition television and Dolby AC-3. The standards are based on MPEG-2, but what really distinguishes them is the reliability of signal delivery to a specific viewer. So, for example, if during an ATSC baseball show a bird suddenly sits on the antenna and the transmission is interrupted because of this, the viewer will be dissatisfied with the work of such television.
If we compare the USA and Russia, then it may seem to someone that the countries are similar. But this is true only in relation to their vast territories. For both the United States and Russia, this means the importance of developing a satellite constellation for the primary distribution and redistribution of television programs. The differences are primarily associated with different climatic conditions. Strange as it may seem, the radio transparency of buildings in warmer climates facilitates television reception. However, even under such favorable conditions, ATSC reception on indoor antennas and portable televisions is not considered at all. In New York, every house is connected to the cable, however, every American family has 3-4 additional TVs connected to the cable with an indoor antenna.
Thus, the practical implementation of the ATSC standard clearly showed the failure of both amplitude modulation (8VSB) and the lack of an effective means of dealing with the reflected signal. In reality, instead of the advertised reduction in the power of the DH transmitter, in fact, the power of the transmitter on the tallest building in New York was increased to 350 kW, while not providing guaranteed reception at every point in the city. It is gratifying to note that in the USA a band has been allocated for experimental DVB-T broadcasting.
In Russia, buildings are mostly reinforced concrete or brick with reinforced concrete ceilings. Even many holiday villages and cities consist of houses containing reinforced concrete or metal structures that make them non-radio transparent. We should not forget about the fact that in Russia and neighboring countries the Secam analog television standard has been adopted, the anti-interference measures of which are not provided for in the ATSC standard at all. The introduction of the ATSC standard in Russia will be not only harmful, but also disastrous, since it will require huge investments in the antenna-feeder economy of television networks, as well as the immediate abandonment of analog broadcasting in the Secam standard.
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April 16, 2024 08:12:49 +0300 GMT
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