UPNP-AV and DLNA

UPNP-AV & ALNA

This section contains partial interesting information about "Universal Plug & Play" for audio and video UPNP-AV and "Digital Living Network Aliance" specifications DLNA

DLNA

More information aboout DLNA is provided by http://dlna.org. Unfortunately most informations are more marketing informations and there is only little technical facts.

However here are some helpful informations/links:

• DLNA Homepage
• DLNA White Paper

The following formats are defined to be supported (required and optional):

DLNA Media formats for Home Devices

Media Formats	Required Formats Set	Optional Formats Set
Imaging	JPEG	GIF, TIFF, PNG
Audio	LPCM (2 channel)	MP3, WMA9, AC-3, AAC, ATRAC3plus
Video	MPEG2	MPEG1, MPEG4, WMV9

DLNA Media formats for Mobile/Handheld Devices

Media Formats	Required Formats Set	Optional Formats Set
Imaging	JPEG	GIF, TIFF, PNG
Audio	MP3 and MPEG4 AAC LC	MPEG4 (HE AAC, AAC LTP, BSAC), AMR,ATRAC3plus, G.726, WMA, LPCM
Video	MPEG4 AVC (AAC LC Assoc Audio)	VC1, H.263, MPEG4 part 2, MPEG2, MPEG4 AVC (BSAC or other for Assoc. Audio)

DLNA media format rules (Quotes from white paper)

The DLNA media format model defines a set of required media formats and a set of optional media formats for each of the three classes of media and for both device categories: image, audio, and video with audio (AV). (see above).

The network interoperability model for media formats is as follows:

• All DMS, DMP, DMR, DMC, and DMPr devices, and their counterpart MHD devices, must support all formats designated in above tables as required for any of the media classes and device category they support. In the addition, all DMS/M-DMS and DMP/M-DMP/M-DMD devices may support any additional formats designated as optional for any of the media classes they support.
• Any DMP, M-DMP, DMR, M-DMD and DMPr device must be able to receive content from any DMS or M-DMS device. A DMS or M-DMS device may stream content in its native format if the receiving device supports such native format. Otherwise, that DMS or M-DMS device should transcode the native format to one of the applicable required formats or to a format understood by the rendering device.