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`Olg'S'l'l9501!.‘
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`03-33:-at
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`PROVISIONAL APPLICATION COVER SHEET
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`is a request for filing a PROVISIONAL APPLICATION under 37 CFR 1.53(c)
`
`Docket Number
`148597.!
`
`Type a plus sign (+)
`inside this box—>
`
`FIRST NAME
`
`MIDDLE
`INITIAL
`
`INVENTOR S /APPLICANT S
`LAST NAME
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`RESIDENCE
`CITY AND EITHER STATE OR FOREIGN COUNTR
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`Elabaddy
`Chan
`Sankaranarayan
`Sahasrabudhe
`Alkove
`
`Redmond, WA
`Redmond, WA
`Issaquah, WA
`Redmond, WA
`Woodinville, WA
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`TITLE OF THE INVENTION
`(280 characters max)
`Method and Sharing Media Libraries and playlists on data home networks
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`CORRESPONDENCE ADDRESS
`
`Bart Eppenaucr
`Microsoft Corporation
`A'I'I'N: Patent Docket Department
`One Microsoft Way
`Redmond, WA 98052-6399
`(425) 882-8080
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`ENCLOSED APPLICATION PARTS check all that a I
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`Specification
`Drawing“)
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`Number ofPage: 6_6
`Number ofsheets
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`E Return Receipt Postcard
`Certificate ofMailing included below
`
`:
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`METHOD OF PAYMENT
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`_ %:4 The Commissioner is hereby authorized to charge filing fees or credit any overpayment to Deposit Account Number: 50-0463.
`Total Fee Due: $150.00
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`"is invention was not made by an agency ofthe United States Government or under a contract with an agency of the United States
`Govemment.
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`Respectfully su
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`Signature:
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`Date: 03/26/200I
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`Typed or Printed Name: D. Bartley Eppenauer
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`Reg. No. 35499
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`"Express Mail" Mailing Label number: EL 767143416
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`Date of Deposit: 03/26/2001
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`I hereby certify that this paper or fee is being deposited with the United States Services "Express Mail Post Office to Addressee” service under 37
`CFR on the date indicated above and is address
`to the Assistant Commissioner for Patents, Washington, D.C. 20231
`%
`Lisa Brick
`(Typed or printed name or person mailing paper or fee)
`(Signature of person mailing paper or fee)
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`PROVISIONAL APPLICATION FILING ONLY
`
`Netflix, Inc. Exhibit 1005
`
`Netflix, Inc. Exhibit 1005
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`

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`Title of Invention: A method for sharing media libraries and playlists on data home networks
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`Inventors: Tarek Elabbady, Shannon Chan, Mukund Sankarayan, Sandeep Sahasrabudhe
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`The general plan for this design was shared under NDA with Compaq, Dell, and Broadcom
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`Introduction
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`This invention describes two software services: the media library service and the media catalogue service.
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`The Media Library service exposes a list of metadata describing media content stored on a home network
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`media stores and created by media jukeboxes living on PCs or digital AV devices. The Catalog Service is a
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`centralized service hosted by one PC that discovers and aggregates the contents of all media libraries
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`published on the home network and presents a unified list that could be accessed from interested devices on
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`the network. Each item in the media library or the media catalog consists of metadata about a piece of
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`digital media such as an audio track, video clip, or digital image.
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`New Role for the PC in the Entertainment Arena: These services provide excellent examples for why
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`PCs should play more center role in the connected home entertainment scenarios. By hosting these services,
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`the PC offers a content management on top of its present role as media storage and media gateway. The
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`consumer electronics device companies have been rejecting such position for the PC.
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`Leadership Role: A new generation of digital audio and video players/recorders are appearing around us to
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`support digital/internet media mania. These devices are primarily focused on extending the digital media
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`and video beyond its storage location on the PCs or from the Internet servers directly. However, these
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`devices are now being introduced following no standard design. Each manufacture for these devices is
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`working on proprietary solutions for presenting, accessing, and controlling the digital media contents
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`available on the home network. By implementing these services in the platforms, device companies will be
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`encouraged to adopt our approach that can become the standard for such applications. The more
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`standardized the designs become, the more successful it will be in the market place, and the less confused
`the consumer.
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`Motivation for the Invention:
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`The digital media is the fastest growing Ecommerce activity in this era. The PC is the number one gateway
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`for media contents today, and is the most logical choice to store it. The consumer media experience in the
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`home usually takes place in rooms away from the PC-room, Digital Media device companies saw the need
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`for a device that can pull/receive the digital media from its store to play in traditional entertainment centers
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`regardless of the PC location. However, until now, there is no standard mechanism that allows users to
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`access their media collection from Uls presented on these devices. Therefore our invention is the first
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`attempt to offer such standard method. The method utilizes the Universal Plug and Play networking
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`protocols standards as well as standard data exchange languages (XML) and Standard scripting language
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`(Jscript) to create, distribute media libraries and aggregate the libraries in one unified catalog the user can
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`access from any of these devices. In addition, the Media Library Service is designed to meet three basic
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`requirements: ( 1). Access Control: media devices on the home network typically do not logon to a domain
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`controller. In a typical configuration, we will set the ACLs to allow access to anonymous users. This
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`means that any UPNP control point on the home network can access the UPNP Media Library Service.
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`The home network should be protected by an Internet firewall to prevent unauthorized access. (2). Network
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`Firewalls: the home network should not be directly connected to the Internet. UPNP devices on the home
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`network should connect to the Internet via Internet Connection Sharing. ICS acts as a firewall, preventing
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`unauthorized users from accessing the IP addresses of UPNP devices on the home network. (3) Content
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`MICROSOFT Corporation
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`EL 767143416
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`
`Netflix, Inc. Exhibit 1005
`165%
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`Netflix, Inc. Exhibit 1005
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`1
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`

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`unauthorized users from accessing the IP addresses of UPNP devices on the home network. (3) Content
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`Protection: we will make an effort to protect copyrighted content from unauthorized duplication. Our
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`content protection implementation consists of an ISAPI filter and the DRM Portable Media License
`Service.
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`Description of the Invention:
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`The main function of the service is to map existing media libraries created on a PC to XML-document using
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`a standard XML-schema. The resulting XML document then is advertised to the Universal Plug and Play
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`(UPnP) network. The user, using MediaLibra1y UPnP control points on the home network, can discover the
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`Media library service and invoke actions to the service (search, query, additem,
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`The following is a system flow highlights for the applicable scenario
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`At boot-up time, the UPnP “Media Catalog” service is created and hosted by a pre—conf1gured
`(1)
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`server PC on the network (possibly the gateway machine). Using UPnP discovery message, the
`service then is advertised on the home network.
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`Following the catalog notification, each media library hosted by a network PC or Digital AV device
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`advertises itself to the network, which then can be discovered by the catalog service. The catalog
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`aggregates the contents of all media libraries on the network and forms a unified list of pointers
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`(URLs) to digital media on the home net. The catalog then is re—advertised to the network.
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`The user on the UPnP-enabled device discovers the media catalog. The catalog control point on the
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`device contains a catalog U1 and a catalog manager. The user views the catalog content on the
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`catalog’s U1 and select the media to play using the catalogs manager. At this point using a third
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`party UPnP control point, such as a universal remote control, the user can also discover both the
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`media catalog and DAR devices on the home net.
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`Once the users make their selection from the catalog, the DAR returns a URL (or UNC) of the
`selected media to the content server associated with the media store.
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`The content server establishes the connection with the requesting device opens and reads the
`selected media file and initiates the transmission of the file contents to the device.
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`The device decode and decompress the file content and initiate playback of the media
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`(2)
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`(3)
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`EL 767143416
`
`
`Microsoft Corporation
`
`
`
`
`PAGE: 2
`
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`Netflix, Inc. Exhibit 1005
`MW
`
`Netflix, Inc. Exhibit 1005
`
`2
`
`

`
`Diagrams and Flow Charts:
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`Music Library
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`DAR CLIENT
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`I l3lEE
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`m.--------....«...-. . .......
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`..._......_u.....«....«..
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`.—....-......u...—_ ..l
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`-' — ' UP“?
`— I— 0 HTTPISI‘/[B
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`- - - SAC
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`DAR: Digital Audlo(Madia) Receiver
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`License
`Generator
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`_
`'
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`‘
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`_"'
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`'
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`Manually register the DAR
`Advertise Library to the Network using UPnP
`Discover the library by the DAR UPnP-control point
`Conduct a search for music (query the library)
`Results from the search (list of URLs)
`Select music (URL)
`Request the content of music file via HTTP GET (URL) or File 10
`(UNC)
`Open & Read file using file server or HTTP server
`Transmit file content to DAR
`
`WME PAK attempts to decode, decompress the file to play
`For protected files (all shared files on home networks will be DRM-
`protected), WME PAK asks DAR client for license.
`DAR client requests Server to issue a portable media license. The
`following info is sent from BLT to PC in this call:
`
`EL 767143416
`Microsoft corporation
`
`PAGE:3
`
`Netflix, Inc. Exhibgt 1005
`
`Netflix, Inc. Exhibit 1005
`
`3
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`

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`0 URL, Seria1#, KID, Extended info from V7HeaderObject,
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`Application security level
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`Open the PM license store based on the serial #. Note that store are kept
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`on per device basis.
`Read the store into
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`Request DRM client to give a PM license. memory (only if the DAR
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`registration is confirmed by the license generator)
`SetLicenseStore
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`9
`SetV1KID or SetV2ContentHeader, based on license type.
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`CreatePMLicense
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`Save the updated license store obtained from CreatePMLicense.
`Return the license store to the DAR client.
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`DAR client forwards the store to WME PAK to proceed with decoding
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`and decompressing the music content
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`Play the song
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`EL 767143416
`
`
`Microsoft Corporation
`
`
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`PAGE: 4
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`
`
`Netflix, Inc. E ibit 1005
`45 W
`
`Netflix, Inc. Exhibit 1005
`
`4
`
`

`
`DigitalAudioReceiver:0.1 Device Template
`For Universal Plug and Play Version 1.0
`Status: Preliminary Design (TBD)
`Date: November 3rd, 2000
`
`Microsofi Confidential.
`
`© 2000 Microsoft Corporation All Rights Reserved
`
`Authors
`Tm Elabbadv
`
`Company
`
`
`
`
`
`irstfl21??‘*3
`
`Microsofi Corporation
`
`EL 767143416
`
`Netflix, Inc. EXhibi’E%005
`«J5
`
`£33
`5‘!kzé
`F’
`“F
`-1
`
`T e
`
`.
`
`“ll.”-’Eli.
`
`Netflix, Inc. Exhibit 1005
`
`5
`
`

`
`Digital-Audio-Receiver (DAR):0.1 Device Temglate
`
`2
`
`Contents
`
`1. OVERVIEW AND SCOPE ..........................................................................................................................3
`
`1.1.
`1.1.
`
`CHANGE LOG FOR MEDIAS'I'ORE:0.l ............................................................................................................. ..4
`EXTERNAL DEPENDENCIES ............................................................................................................................ ..4
`
`20
`
`nunnoun«nunononnuouuunuunuuununuuonononnnnnunInnntouuooocnounnoononnnouoouuuuuu05
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`2.1.
`2.1.
`
`DEVICE TYPE................................................................................................................................................ ..5
`’DEv1CE MODEL ............................................................................................................................................ ..5
`
`Description ofDevice Requirements.................................................................................................... ..5
`2.1.1.
`Relationship Between Services............................................................................................................. ..5
`2.1.1.
`2.3.
`THEORY OF OPERATION ................................................................................................................................ ..6
`
`3. XML DEVICE DESCRIPTION
`
`.........................................................................................................6
`
`40
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`noon»us-onunuoouooooocuoquuuuuuuuu-unuuoooounnnouuuuuuu--ouuoocoouooooooooooooooooooooooooo-ouunvnoouuouoooooooooooooooooooounuunuus
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`List of Tables
`
`Table 1: Device Requirements ..................................................................................................................................... ..5
`
`Microsoft Corporation
`
`EL 767143416
`
`Netflix, Inc. EXhibi'[%¢%5
`
`Netflix, Inc. Exhibit 1005
`
`6
`
`

`
`Digital-Audio-Receiver (DAR):0.1 Device Template
`
`1. Overview and Scope
`This device template is compliant with the Universal Plug and Play Device Architecture version 1.0. It defines a
`device type referred to herein as Digital-Audio-Receiver (DAR):0.1.
`
`Digital-Audio-Receiver (DAR):0.1 is a model for a device used to render and control digital music transported on
`the home networks.
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`General Functions: A device with a network connection that can:
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`-
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`Discovers, and access media library services on the network
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`Display, and manage the media library on a small LCD-display, or can be connected to a TV to
`display the control and navigation Uls
`Establish connection with media stores on the network and/or intemet senrices
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`Reads streamed encoded digital music content from a media store on the network or lively
`streamed (from intemet radio)
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`Decode popular digital music fonnat
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`Renders the music directly or sends the decoded music to independent music renderers
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`Control the playback of the music by invoking actions on variables defined for UPnP services
`referenced in this document
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`The DAR device encapsulates ftmctionality for AV-transport, variable-control, connection, and media library
`services into an atomic unit.
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`AVTransport: This service type enables control over the transport of audio and video streams. The service type
`defines a ‘common’ model for AN transport control suitable for generic user interface. The model also allows for
`‘forwarded’ control action, enabling the distribution oftransport control state across connections by means of
`eventing. The service type is related to the Connector service type, which describes A/V connection setup
`procedures.
`
`Connector: This service-type enables modeling of streaming capabilities of AN devices, and binding of those
`capabilities between devices. The service is based on the notion of a ‘Connector’ which has a number of properties
`including direction (in/out), content-format (WMA, MP3, etc.) and a number of ‘peer Connectors’ to which it is
`connected. The connector service is used to negotiate a data transfer protocol and format between the Digital-Audio-
`Receiver (DAR) and the rendering device. This could range from simple bulk data transfer over HTTP, or SMB to
`streaming over RTP.
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`Variablecontrol: This service-type enables control of a generic variable-setting control such as a volume control.
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`MediaLibrary: The Media Library service exposes a list of metadata describing media content stored locally on the
`host device and on user-selected list of Internet sites.
`
`Diagram 1: Digital-Audio-Receiver (DAR):0.1 System Diagram
`
`AVTransport:
`
`Variablecontrol
`
`1
`T
`
`D Required
`D Optional
`
`Microsoft Corporation
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`EL 767143416
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`Digital-Audio-Receiver (DAR):0.1 Device Template
`
`1.1. Change Log for Digital-Audio-Receiver (DAR):0.1
`
`Ver Date
`El 11/02/00
`
`Author
`Tmkfilabbadv
`
`Changes
`
`1.2. External dependencies
`
`None.
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`Digital-Audio-Receiver (DAR):0.l Device Template
`
`2. Device Definitions
`
`2.1 . Device Type
`
`The following device type identifies a device that is compliant with this template:
`
`urnzschemas-microsol't—com:device:Digital-Audio-Receiver (DAR):0.l
`
`The shorthand Digital-Audio-Receiver (DAR):0.1 is used herein to refer to this device type.
`
`2.2. Device Model
`
`Digital—Audio-Receiver (DAR):0.1 products must implement minimum version numbers of all required embedded
`devices and services specified in the table below.
`
`Table 1: Device Requirements
`
`Device Type
`
`Root
`
`Req.4or
`Opt.
`
`Service Type
`
`Req.1or
`Opt.
`
`Service ID?
`
`yes
`
`VariableCont'ro1:0. l
`
`Digital-Audio-Receiver
`(DAR):0.l
`——_E
`—__1
`—-n-
`R = Required, 0 = Optional, X = Non—standard.
`2 Prefixed by urnzupn moggzserviceldz .
`
`VarigbIeContro1
`
`2.2.1. Description of Device Requirements
`
`Connector is a proposed Forum (standard) service used to negotiate and bind an AN stream between the Digital-
`Audio-Receiver (DAR) and media sink. For details on this service, see the related specification Connector:0.81
`Service Template.
`
`AVTransport is a proposed Forum (standard) service used to define common Audio/Video transport control
`mechanisms. For details on this service, see the related specification AVTransport:0.l Service Template.
`
`MediaLibrary is a Microsoft (nonstandard) service used to manage and select collections of multimedia content to
`play. For details on this service, see the related specification MediaLibrary:0.1 Service Template.
`
`Varlablecontrol is a proposed Forum (standard) service used to control generic variable-setting control such as a
`volume control, see the related specification VariableControl:0.21 Service Template.
`
`2.2.2. Relationship Between Services
`
`Microsofi Corporation
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`EL 767143416
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`Netflix, Inc. EXhlbltq1‘0.()‘-5
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`Netflix, Inc. Exhibit 1005
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`9
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`

`
`
`
`Digital-Audio-Receiver (DAR):0.1 Device Template 6
`
`Theory of Operation
`
`3.
`
`XML Device Description
`
`NOTE: Not up to date.
`
`<?xml version="1.0"?>
`
`<root xm1ns="urn:schemas—uEnE—org:device-1-0">
`<sEgcVersion>
`<major>$</ma'or>
`<minor>0</minor>
`</s dVer;ion>
`<URLBase>base URL for all relative URLs</URLBase>
`<dsvica>
`
`
`<deviceg1gg>urn:schema:-microsoft-com:device:D1gitaJ—Audio—Receiver
`(DARL:Q;;</davice§y2g>
`<friend1g§ame>short user-friendly title</friendl1§ame>
`<manufacturer>manufaccurer name</manufacturer>
`<manufacturerURL>URL to manufacturer sjte</manufacture:URL>
`
`<mod9lDascriEtion>long user-friendly title</modelnescri tion>
`<mode1Name>model name</mode1Name>
`<modelNumber>model number</node1Numbar>
`<modelURL>URL to model site</mode1URL>
`<seria1Number>manufecturer'3 serial number</serialNumber>
`
`<gQ§>uuid:UUID</UDN>
`<gg§>Universal Product Code</§§§>
`<iconList>
`<icon>
`
`<mimetxgg>image/format</mime§2ge>
`<width>horizontal pixels</width>
`<height>vertical plxels</hei ht>
`<dgEth>color deptn</dc2th>
`<E£l>URL Lo iCOn</url>
`</icon>
`XML to declare other icons,
`</iconList>
`<sarviceList>
`<service>
`
`if any, go here
`
`<service3gEe>
`urn:schema:-microsoft-com:sorvice:Digita1-Audio Receiver
`{DAR):0.1</servicegx2e>
`<serviceId>urn:microsoft—com:serviceldzfligital—Audio-Receiver
`(DAR)</servicaId>
`<sCPDURL>URL to service description</SCPDURL>
`<controlURL>URL for control</contro1URL>
`<aventSubURL>URL for eventing</evontSubURL>
`</service>
`<servioa>
`
`<serviceg2E§>urn:schemas-ugng-org:service:Connector:0.85</servicegxEe>
`<serviceId>urnzugng-orgzserviceld:Connector</serviceId>
`<SCPDURL>URL to service description</SCPDURL>
`<contro1URL>URL for control</contro1URL>
`<eventSubURL>URL for eventing</eventSubURL>
`
`Microsoft Corporation
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`EI.767143416
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`10
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`Netflix, Inc. Exhibit 1005
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`
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`Netflix, Inc. Exhibit 1005
`
`10
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`
`Digital-Audio-Receiver (DAR):0.1 Device Template
`
`</service>
`<service>
`
`<servicegx2§>
`urn:schamas-ugng-org:service:AVTransEort:O.2</service!
`<servicaId>urn:ugng-org:serviceId:AVTransgcrt</sarviceId>
`<SCPDURL>URL to service description</SCPDURL>
`<contro1URL>URL for control</contro1URL>
`<eventSubURL>URL for eventing</eventSubURL>
`</service>
`<servica >
`
`e>
`
`<service2x2e>
`urn:schemas-ugng-org:service:Variableccntrol:Q;§</sarvice§xgg>
`<serviceId>urn:uEnE-org:serviceld:variablecontro1</aerviceId>
`<SCPDURL>URL to service description</SCPDURL>
`<controlURL>URL fbr control</controlURL>
`<evantSubURL>URL for eventing</eventSubURL>
`</service>
`
`Declarations for other services added by UPnP vendor (if any) go here
`</servicaList>
`<EresantationURL>URL for presentaLion</ resentat1onURL>
`</device>
`</root>
`
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`Netflix, Inc. Exhibit 1005
`
`11
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`Digital-Audio-Receiver (DAR):0.1 Device Template
`
`Test
`
`4.
`
`TBD.
`
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`Netflix, Inc. Exhibit 1005
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`12
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`

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`Microsoft Confidential
`
`Digital Audio Receiver (DAR) Architecture
`
`
`
`Author: MukLmd Sankaranarayan
`
`Date: 11/27/00
`
`1:’?
`
`Status: Rev. 0.2
`
`E?:22‘.
`5rd?53
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`13
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`Microsoft Confidential
`
`
`
`
`
`Overview ........................................................................................................................... .. 3
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`
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`General Architecture ......................................................................................................... .. 3
`
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`Description .................................................................................................................... .. 3
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`1. Media Library Control Point ................................................................................. .. 3
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`2. DAR Control Point ...................
`........................................................................ .. 4
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`3.DARDeVice ..............
`....................................................................................... ..5
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`
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`Open Issues ................................................................................................................... .. 5
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`Microsoft Corporation
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`EL 767143416
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`Netflix, Inc. Exhibit 1005
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`Netflix, Inc. Exhibit 1005
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`Microsoft Confidential
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`
`
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`Overview
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`This document describes the architecture design of the Digital Audio Receiver (DAR)
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`client. The usage scenarios and hardware specifications of DAR are described separately
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`in documents referenced at the end of this document.
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`General Architecture
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`Logically there are three components — the DAR UPnP device and an UPnP control point
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`to control the DAR, and a control point for Media Library.
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`. DAR UPnP Device: This is the device on which music is rendered.
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`It exposes
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`several services -like play, pause, and stop—via which a control point can
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`manipulate the device. A detailed description of the services offered to control the
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`device is described in the DAR device control protocol (DCP).
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`. U1’nP DAR Control Point: controls the DAR device described above.
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`. Media Library Control Point: controls the media library. The services exposed by
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`the media library are described in the Media Library device control protocol
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`Description
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`The following is a detailed description of both devices and role they play in selection and
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`rendering of a piece of music content from the media library service (MLS).
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`1. Media Library Control Point
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`1. Media Library discovery: The control point after registering itself searches for
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`media libraries on the home network. The discovery protocol
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`is based on a
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`multicast SSDP message, defined by the UPIIP specification, that specifies the
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`Microsoft Corporation
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`EL 767143416
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`Search target as “urn:schemas-upnp-org:device:WMP___MediaLibra;ry:1”, where is
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`WMP_MediaLibrary:l defines device type and version.
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`2. Each of the media library devices on the network responds to the above message
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`with the following information: device’s IHJID, and URL to device’s UPnP
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`description.
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`3. The control point issues the HTTP GET request on the device URL, obtained in
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`the previous step, to learn about the device description and its services.
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`4. The control point, next, displays the top-level menu items. The control point
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`creates the menu by querying the media library services (MLS) and aggregating
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`them.
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`5. Control points invokes the “GetView” action the on MLS. The user selection,
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`expressed in XPATH filter expression, is the argument to this method. This action
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`is invoked on each and every MLS identified on the network and results from all
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`MLS are merge-sorted prior to presenting them to the user.
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`6. The user selects the song to be rendered.
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`2. DAR Control Point
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`1. The control point presents a list of all DARS on the network if there is more than
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`one DAR on the network.
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`2. The control point invokes the “Play” action on the DAR UPnP device selected in
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`the previous step. The URL of the song selected by the user is sent. The URL was
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`obtained as a result of GetView action.
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`Implementation
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`Given that most of the control-point devices will have some form of minimal HTML
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`client (web browers) we will provide a sample implementation using HTML and JScript.
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`Scripting was chosen (instead of DLL etc) so that it will work on cross~platforms Without
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`a recompile; JScript was chosen over VBScript as it has wider support across platforms.
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`Note that both control points can live on the DAR device or remote PDA. This is a
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`packaging issue that will be defined by the OEM.
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`Microsoft Corporation
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`Microsoft Confidential
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`3. DAR Device
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`The DAR device contains the following components: an UPnP service; a separate engine
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`each type of format it can play — WMA, MP3, etc; a client that can download (or stream)
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`data from Content Server using HTTP; and an application.
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`The description of DAR and its interaction with Content Server is described below:
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`l. For each of the format type supported, the DAR performs some initialization.
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`Specifically, for WMA files the DAR initializes the VWVIE PAK.
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`2. The DAR advertises itself as UNP device on the home net using SSDP as
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`described in UPnP specification.
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`3. The control point invokes “Play” action on the DAR passing in the URL of song
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`to be played (see step #8 under section “DAR Control Point”).
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`4. The application on the DAR downloads the content using HTTP GET. Based on
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`the content format (MP3, WMA) it forwards the stream to the appropriate
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`rendering engine. Let us assume that format is WMA for further discussions.
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`5. The WMA engine attempts to play the song. If its copy protected then, it calls
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`back the handler registered at WME initialization time requesting for the license.
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`6. The handler requests the license from the PC. The protocol for this interaction is
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`yet to be finalized.
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`Open Issues
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`1. The protocol between the DAR device and PC is yet to be finalized.
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`2. What types format will be shared from the media library — WMA and MP3.
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`3. What is the implication of sharing “clear MP3 content”? Do we need secure
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`sharing?
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`4. Aggregated media library services will have an impact in the logic on DAR
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`device.
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`Microsoft Corporation
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`Digital Media Description Language
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`Revision 0.2
`Author: James Alkove
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`Last Updated: 10/31/2000
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`Microsoft Corporation
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`A Netflix, Inc.
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`5&5
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`Objective
`
`The purpose of the Digital Media Description Language is to provide an extensible way
`of describing digital media items and collections of digital media items.
`
`Overview
`
`Digital Media Description Language is an XML-based description language for digital
`media items and collections.
`
`Media Collections
`
`For media collections we will be using SMIL2. Since SMIL supports elements contained
`inside of its media elements, we will simply embed a MEDIAITEM within the containing
`SMIL media element.
`
`Example:
`
`<seq>
`
`<video title=”My video” src="myvideo.wmv”>
`<mediaitem>m<mediaitem>
`
`</video>
`</seq>
`
`The player will implement a subset of the full SMIL2 specification. Specifically the
`Media Object Modules, and Timing and Synchronization Module. This is the same
`functionality that we are using in Hercules for server side play list support so we should
`be able to leverage knowledge if not code.
`
`In our client SMIL implementation the data in the mediaitem element will take
`precedence over the data in the actual media element whenever both are present. This
`rule give the client the ab