By Ivan Noble
BBC News Online science and technology staff
Sony and Philips are joining Microsoft and its partners in the market for networked home entertainment products.
Sony's device will sit next to a television
Sony is showing its Network Media Receiver at the CeBIT technology fair in Hanover and Philips is exhibiting its Wireless Digital Multimedia Receiver.
Both products are designed to transport PC-based digital music and video to a living-room friendly device.
Sony's living room box is a small grey device which connects to a television and, if required, a stereo amplifier.
The PC which stores the music and video or streams it from the internet does not have to be in the same room, but does have to be a Sony PC running Sony's software.
The receiver box has a remote control and displays a menu on the television screen of what is available from the PC.
The connection to the living room unit is via conventional wired Ethernet cabling, but it can be plugged into a wireless access point to offer a wireless connection.
Fitting in without cables
The Philips unit looks much more like a conventional stereo separates system unit and is designed to fit in with an existing home system.
Like the Sony unit, it connects to an audio amplifier and a television to provide an interface to the audio and video stored on the PC.
The Philips box is designed match existing components
Philips' receiver uses a wireless link and can connect directly to the internet itself using a wireless access point to provide access to streamed audio.
Sony's product is due out "soon" and Philips' in the second quarter of the year.
CeBIT ends on Wednesday.