The Windows 7 NSS provides multiple transcoded streams that use different codecs, and transcoded resource elements at different resolutions and bit rates. This option lets devices choose the stream that best meets their characteristics and bandwidth limitations. An example of this is a portable network device such as a Wi-Fi–capable mobile phone.
In Windows 7, users choose DMR devices in the network from a list that is provided by Windows Media Player or Windows Explorer and send content from PCs to the DMRs for playback. A DMR is a DLNA-defined networked device role. The DMR is the device in the network that plays content. The DMR implements the following three UPnP services:
Connection manager service, which lists all the media formats that the DMR supports.
AV transport service, which provides basic playback functions such as play, stop, and seek.
Rendering control service, which provides basic output control functions such as volume and brightness.
Figures 9 through 12 show the Windows 7 Play To feature that is available on the shortcut menu in Windows Media Player and Windows Explorer when one or more media items are selected. Media items can be selected in the local library or in other libraries. The Play To feature is also available from the playlist area of Windows Media Player. All media items that are dropped into the playlist area are sent to the selected DMR for playback.
Figure 9. The Play To feature on the shortcut menu in Windows Media Player showing multiple DMR devices available on the network
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