7 Appendix B: Protocol Information String (PRT)

Partner applications can query Media Center Extender devices to determine the supported Audio Visual (AV) media file formats supported by those devices. Devices use the PRT string property to expose the supported AV formats of the specific device.

The format for the protocol information string is mentioned in <section 2.5.2> ProtocolInfo Concept in [UPNPAV].

The <additional info> field is a name value pair separated by ";". The name value pairs follow the format of <org-name>_<token-name>=<value>. Additional information for the same can be found in <section 2.5.2.1> 4th Field - <additionalInfo> [UPNPAV].

The <org-name>_<token-name> values used are:

• DLNA.ORG_PN

• MICROSOFT.COM_PN

The following table shows all the supported media types for <org-name>="MICROSOFT.COM" and <org-name>="DLNA.ORG" respectively. The terms used in the supported column are further described in subsequent tables.

<org-name>="MICROSOFT.COM"	Video media type	Audio media type
WMALSL	N/A	MTG_WMA_LOSSLESS
WAV_PCM	N/A	MTG_PCM
DVRMS_MPEG2	MTG_MPV	MTG_MPA
DVRMS_MPEG2	N/A	MTG_AC3
VC1_APL2_FULL	MTG_VC1	MTG_WMA_STD
VC1_APL2_PRO	MTG_VC1	MTG_WMA_PRO
VC1_APL3_FULL	MTG_VC1	MTG_WMA_STD
VC1_APL3_PRO	MTG_VC1	MTG_WMA_PRO
MPEG4_P2_MP4_ASP_L5_MPEG1_L3	MTG_MPEG4P2	MTG_MP3
MPEG4_P2_AVI_ASP_L5_MPEG1_L3	MTG_MPEG4P2	MTG_MP3
MPEG4_P2_MP4_ASP_L5_AC3	MTG_MPEG4P2	MTG_AC3
MPEG4_P2_AVI_ASP_L5_AC3	MTG_MPEG4P2	MTG_AC3
AVC_AVI_MP_HD_L4_1_MPEG1_L3	MTG_MPEG4P10	MTG_MP3
AVC_MP4_MP_HD_MPEG1_L3	MTG_MPEG4P10	MTG_MP3
AVC_MP4_MP_HD_AC3	MTG_MPEG4P10	MTG_AC3
AVC_AVI_MP_HD_L4_1_AC3	MTG_MPEG4P10	MTG_AC3

<org-name>="DLNA.ORG"	Video media type	Audio media type
WMABASE	N/A	MTG_WMA_STD
WMAFULL	N/A	MTG_WMA_STD
WMAPRO	N/A	MTG_WMA_PRO
MP3	N/A	MTG_MP3
AC3	N/A	MTG_AC3
LPCM	N/A	MTG_PCM
MPEG_ES_PAL	MTG_MPV	N/A
MPEG_ES_NTSC	MTG_MPV	N/A
MPEG_ES_PAL_XAC3	MTG_MPV	MTG_AC3
MPEG_ES_NTSC_XAC3	MTG_MPV	MTG_AC3
WMVMED_BASE	MTG_WMV	MTG_WMA_STD
WMVMED_FULL	MTG_WMV	MTG_WMA_STD
WMVMED_PRO	MTG_WMV	MTG_WMA_PRO
WMVHIGH_FULL	MTG_WMV	MTG_WMA_STD
WMVHIGH_PRO	MTG_WMV	MTG_WMA_PRO
WMVSPLL_BASE	MTG_WMV	MTG_WMA_STD
WMVSPML_BASE	MTG_WMV	MTG_WMA_STD
WMVSPML_MP3	MTG_WMV	MTG_MP3
MPEG1	MTG_MPV	MTG_MPA
MPEG_PS_NTSC	MTG_MPV	MTG_AC3
MPEG_PS_NTSC	N/A	MTG_PCM
MPEG_PS_NTSC	N/A	MTG_MPA
MPEG_PS_PAL	MTG_MPV	MTG_AC3
MPEG_PS_PAL	MTG_MPV	MTG_PCM
MPEG_PS_PAL	MTG_MPV	MTG_MPA
MPEG4_P2_TS_ASP_MPEG1_L3	MTG_MPEG4P2	MTG_MP3
MPEG4_P2_TS_ASP_AC3	MTG_MPEG4P2	MTG_AC3
AVC_MP4_MP_SD_MPEG1_L3	MTG_MPEG4P10	MTG_MP3
AVC_TS_MP_HD_MPEG1_L3	MTG_MPEG4P10	MTG_MP3
AVC_MP4_MP_HD_AC3	MTG_MPEG4P10	MTG_AC3
AVC_MP4_MP_SD_AC3	MTG_MPEG4P10	MTG_AC3
AVC_TS_MP_HD_AC3	MTG_MPEG4P10	MTG_AC3

The following tables shows the media type mappings from the previous table in the supported video and audio column based on the protocol used.

HTTP

Media type	Meaning	Default value
MTG_MPA	MPEG Audio	Yes
MTG_AC3	AC3 Audio	Yes
MTG_AAC	AAC Audio	Yes
MTG_HE_AAC	AAC HE Audio	Yes
MTG_PCM	PCM Audio	Yes
MTG_MP3	MP3 Audio	Yes
MTG_MPV	MPEG 1/2 Video	Yes
MTG_WMV	WMV Video	Yes
MTG_VC1	VC-1 video	Yes
MTG_MPEG4P10	MPEG 4 Part 10 Video	Yes
MTG_MPEG4P2	MPEG 4 Part 2 Video	Yes

RTP

Media type	Meaning	Default value
MTG_MPA	MPEG Audio	Yes
MTG_AC3	AC3 Audio	No
MTG_PCM	PCM Audio	No
MTG_WMA_STD	WMA Audio Std	Yes
MTG_WMA_PRO	WMA Audio Pro	Yes
MTG_WMA_LOSSLESS	WMA-Lossless Audio	Yes
MTG_MP3	MP3 Audio	Yes
MTG_MPV	MPEG 1 and MPEG 2 Video	Yes
MTG_WMV	WMV Video	Yes
MTG_VC1	VC-1 video	Yes
MTG_MPEG4P10	MPEG 4 Part 10 Video	No
MTG_MPEG4P2	MPEG 4 Part 2 Video	No

The "Default Value" in the previous tables is supported when the PRT string query returns a "null".

The protocol information is used to describe the string formatted as:< protocol >" :"< network >" :"< contentFormat >" :"< additional Info >

The sample protocol information string based on the format above is shown here:

rtsp-rtp-udp:*:audio/x-ms-wma:DLNA.ORG_PN=WMAFULL;

DLNA.ORG_PN=WMAPRO;MICROSOFT.COM_PN=WMALSL

rtsp-rtp-udp:*:audio/mpeg:DLNA.ORG_PN=MP3

http-get:*:audio/L16:MICROSOFT.COM_PN=WAV_PCM

rtsp-rtp-udp:*:video/mpeg:MICROSOFT.COM_PN=DVRMS_MPEG2

rtsp-rtp-udp:*:video/x-ms-wmv:DLNA.ORG_PN=WMVHIGH_PRO;

MICROSOFT.COM_PN=WMVHIGH_LSL;DLNA.ORG_PN=WMVHIGH_FULL;

MICROSOFT.COM_PN=VC1_APL2_FULL;MICROSOFT.COM_PN=VC1_APL2_PRO;

MICROSOFT.COM_PN=VC1_APL2_LSL;MICROSOFT.COM_PN=WMVIMAGE1_MED;

MICROSOFT.COM_PN=WMVIMAGE2_MED

http-get:*:video/mpeg:DLNA.ORG_PN=MPEG1;

DLNA.ORG_PN=MPEG_PS_NTSC;DLNA.ORG_PN=MPEG_PS_PAL

For more information about the formatting of the protocol information string and the naming convention please refer to [UPNPAV].