Изследване и планиране на цифрова телевизия

Abstract

In research and planning a digital TV system, basic requirements such as:
- Compatibility with the digital video and audio compression system developed under the MPEG2 name
- Noise-proof signal encoding
- equalizing the spectral density
- orthogonal OFDM modulation
- multi-frequency carrier of the multiplex
- Providing a technical opportunity for synchronous networks without territorial restrictions and others.
These requirements undoubtedly lead to substantial benefits from digital television, which can be summarized as: high noise immunity, opportunity for neighboring TV channels, efficient energy use of the spectrum, single frequency SFN synchronous networks, saving of huge frequency resource and many others.