Sirius Satellite Radio is getting into the TV business in a very limited way, CEO Mel Karmazin told a Credit Suisse Media conference in New York Wednesday. As reported by Broadcasting & Cable magazine's website, Karmazin revealed that Sirius is working on a service that will transmit kids videos to family vehicles with TV screens in the back seat. Karmazin said that the antenna needed to receive the video is about "the size of a hockey puck." Karmazin played down the value of such a system to Sirius, however.