The discussion focuses on the practical differences between QAM 128 and QAM 256 in HDMI modulators. Transitioning from QAM 128 to QAM 256 results in a slight increase in data rate while maintaining the same resolution and bitrate. However, this enhancement necessitates a higher Carrier to Noise Ratio (CNR) to ensure signal integrity. Understanding these factors is crucial for optimizing signal quality in digital broadcasting.
PREREQUISITESBroadcast engineers, technicians working with HDMI modulators, and professionals involved in digital signal transmission will benefit from this discussion.
Going from 128 to 256 QAM and keeping the bandwidth constant will provide a small increase in data rate but will require a higher Carrier to Noise Ratio.thickglass14 said:Hi guys, I set HDMI Modulator recently, but here is one question - it has QAM 16/32/64/128/256. What is the practical difference between 128 and 256 for example if I keep resolution and bitrate the same?