A technique for digital data compression used in digital television which removes redundancy in the data by comparing bit amplitudes
Transmission of data by modulating the amplitude of two carriers of the same frequency but 90 degrees out of phase✓Correct answer
A method of performing single sideband modulation by shifting the phase of the carrier and modulation components of the signal
A technique for analog modulation of television video signals using phase modulation and compression
Explanation
QAM modulates two carriers at the same frequency but 90 degrees apart — the in-phase and quadrature components — and sums them, so every symbol has both an amplitude and a phase. Because independent data rides on each of the two carriers, one symbol conveys several bits at once.