PQI stands for Picture Quality Index, which is a measurement used in the telecom industry to assess the overall picture quality of a television display. It takes into account various factors such as resolution, colour accuracy, contrast, and motion clarity to provide a comprehensive score that indicates the visual performance of a TV. The higher the PQI, the better the picture quality, making it easier for consumers to compare different televisions and choose the one that best suits their preferences. In essence, PQI serves as a valuable tool for both manufacturers and consumers in evaluating and understanding the visual capabilities of modern television displays.