Final answer:
Direct broadcast satellite service allows TV signals from satellites to be received by dishes in homes, tuning in the signals at specific frequencies. Both audio and video signals are amplified for viewing, with video using AM and audio using FM frequencies. This technology is evolving with high-definition formats and underlies a significant part of modern TV broadcast distribution.
Step-by-step explanation:
The process being described is known as direct broadcast satellite (DBS) service, where signals sent to a satellite can be directly received by TV sets in homes with small satellite receiving dishes. These dishes focus the weak incoming signals onto an antenna, which is tuned to resonate at specific frequencies. An internal receiver amplifies the signals, which include both audio and video components, with the TV video signal being in Amplitude Modulation (AM) and the TV audio in Frequency Modulation (FM). Concurrently, advancements in cable transmission offer an alternative distribution method, whereas satellite TV relies on direct airwaves without the need for local affiliates.
The evolution of these technologies sees the use of high-definition (HD) formats and higher transmission frequencies in comparison to traditional roof antennas. The importance of this technology lies in its ability to deliver television programming directly to consumers, bypassing terrestrial means of signal transmission and providing a wide array of shows and channels due to the lack of physical broadcasting constraints. In addition to satellite dishes, cable networks also play a crucial role in program distribution, transmitting signals to local cable company hubs.