TiVo Inc. Tuesday unveiled plans to expand Internet video that can be shown on TVs through its DVRs.

Alviso-based TiVo said its TiVoCast system now has programming partnerships with CBS Interactive, part of CBS Corp. Reuters Group plc and business magazine Forbes to bring their video content to TV.

It will also offer a Home Movies Service, in partnership with Redwood City-based One True Media Inc., that allows sharing of home videos by sending them directly to TV sets.

TiVo’s new service is expected to be offered by the end of the year, but requires an upgrade to the TiVo Desktop software. Some subscribers already use this to view photos from the Web and listen to Internet radio. It, will cost $24.95 for new users and will be a free upgrade for current users.

The service will only work with downloaded videos that are not copy-protected. It can’t handle videos that use San Jose-based Adobe Systems Inc.’s Flash technology, which is becoming the most common way to distribute video on the Internet.

San Bruno-based YouTube Inc., which has been acquired by Mountain View-based Google Inc., uses Flash for its popular video-sharing Web site.

Neither will the services reportedly be available to TiVos that are hooked up through DirecTV Group Inc.’s satellite service.

TiVo has 4.4 million subscribers but its growth has been slowed by competition from cheaper DVRs offered by cable and satellite services.