DTV Receiver - Overview

Overview

Basically, the tuner in the box receives a digital signal from a cable, a satellite, or terrestrial network and isolates a particular channel. The signal is then forwarded to a demodulator and converted to binary format. Once in binary format, the demodulator will check for error and forward the binary signal to a demultiplexer that will extract audio, video, and data from the binary stream. Once the demultiplexer has finished with the signal, the decoders will transform the digital bits bits into a format suitable for viewing on the television set.

As the architecture of a DTV receiver can vary in function of the network operator or the set-box manufacturer, we have chosen to divide the physical components into the following categories:

• system board,
• tuner,
• modulator and demodulator,
• demultiplexer and decryptor,
• decoders,
• graphics processor,
• CPU and memory,
• storage devices,
• physical interfaces,
• physical characteristics.