Impact of high receiver bandwidth interference on image recovery when sampling at HDMI bit rate

Ascertain whether the external radio-frequency interference introduced by increasing the receiver bandwidth to sample at or above the HDMI TMDS bit rate materially degrades the recovery of the displayed image from electromagnetic leakage, and characterize the operating conditions under which image reconstruction remains feasible.

Background

The authors discuss the possibility of sampling at the TMDS bit rate to directly recover the bit sequence but identify several drawbacks: the need for extremely high instantaneous bandwidth SDR hardware, potential interference due to broad receiver bandwidth, and substantial computational demands.

Among these, the effect of external interference caused by increased receiver bandwidth on the feasibility of image recovery is explicitly noted as unclear, motivating a focused investigation to determine whether and when high-bandwidth reception undermines TEMPEST reconstruction for HDMI.