Broadcom appears to have filed a suit with the US International Trade Commission against MediaTek, Sigma Designs and LG, claiming that they are breaching its patents in video decoding. While we have had no joy in pinning down whether this suit has actually been filed for sure, the new Broadcom has apparently forgotten lessons from its run-ins with Qualcomm of old, when Qualcomm filed basic H.264 patents against it and was ridiculed out of court for its trouble. Broadcom now appears to be doing the same. Back in July it filled what can only be described as a nuisance suit against Sony, for the way in which the PS4 handled video and sound. Most of the ten patents it cited…