|As mobile or IP-based TV becomes increasingly popular with viewers, so will the demand for closed captioning for the deaf or hard of hearing. Lawmakers are already flexing their muscles regarding this issue, with the U.S. federal government enacting regulations making it mandatory for broadcasters to supply closed captioning for IP and mobile programming. It will not be long before European legislators devise similar regulations. Broadcasters who arent prepared when these regulations become law may find themselves facing fines and other penalties. To avoid this, it helps to understand the basics of implementing closed captioning for mobile and IP-based television.