San Francisco-Enhanced-TV vendor RespondTV Inc. said last Wednesday that Liberty Digital Inc. made an investment in the company.
The company would not disclose the amount of Liberty's investment. But a spokeswoman said RespondTV has raised $29 million through its latest round of financing.
Recent investors also include AT & T Corp., Comcast Corp., GE Capital Corp., Showtime Networks Inc., Tribune Media Ventures and United Television Inc.
Liberty has invested in several interactive-television players, including ACTV Inc., ICTV Inc., OpenTV Corp., ReplayTV Inc. and TiVo Inc.