Can some video cables “improve” video performance?
No. Video cables simply carry a signal and should NOT try to improve performance. Ideally, the perfect video cable would simply move a video signal from one end to the other unchanged. In the case of composite video, component video, s-video, RGB & RGBHV video, the cable’s ability to accurately transmit a video signal depends primarily on its ability to preserve an accurate 75-ohm signal from end to end. Among other factors, accurate impedance of 75 ohms is most commonly degraded by return loss (RL). RL occurs when signals bounce back to the video source and is caused by irregularities along the cable and cable-to-connector mismatches. Although a cable cannot “improve” performance, it can degrade performance when low quality cables are used, especially over longer distances.
