Today TiVo announced that they have submitted their software for using Switched Digital Video (SDV) to CableLABS for testing. They use an external “tuning resolver” which is a device that talks back to the cable company to tell the head end what stations to send down the pipe.

SDV confronts many users in certain cable markets, especially Hawaii. Likely, more and more cable providers will begin to use SDV as they try to supply ever larger numbers of HD channels down the same cable pipe.

More information is at TiVo’s site. No word, yet, on whether this will also cover On-Demand programming.