Microsoft Technology Licensing, LLC

John Carl Simmons

Quintin Swayne Burns

Andrew Clinick

Scott J Fierstein

Robert Kilroy Hughes, Jr

Samuel John Wenker

Andrew Lee Jenks

Paul England

Charles Finkelstein

John A Bocharov

Ning Lin

Sudheer Sirivara

Joerg Raymond Brown

Robert K Hughes

Kevin M Kane

Jr Hughes Robert Kilroy

Lightweight mechanisms provide a way to assert provenance when live streaming media content and establish provenance upon playback. For example, a provenance claim generator generates a key pair including a live-stream private key and live-stream public key. The claim generator signs, with a long-term private key reliably associated with a sender, manifest metadata including the live-stream public key, thereby producing a manifest signature. During live streaming, the claim generator signs respective portions of media content with the live-stream private key, producing portion signatures for the respective portions. A provenance claim validator receives the manifest signature and manifest metadata. The claim validator verifies the manifest metadata using a long-term public key (reliably associated with the sender) and the manifest signature. During live streaming, the claim validator verifies the respective portions of the media content using the live-stream public key and the portion signatures for the respective portions.

Asserting and establishing provenance of media content during live streaming

Embodiments are disclosed herein that relate to facilitating the discovery of authenticated content from a variety of sources. One embodiment provides a method comprising receiving a plurality of authentication tokens from the media presentation device, where each of the plurality of authentication tokens represents an established authenticated relationship between a user and a corresponding content source. The method further comprises receiving a request from the media presentation device for an electronic programming guide and sending the electronic programming guide to the media presentation device, where the electronic programming guide comprises a listing of content from a plurality of content sources corresponding to the plurality of authentication tokens.

Authenticated content discovery

Examples are disclosed related to presenting on a client device configured for a first digital rights management technology (DRM-1) content that is protected by a second digital rights management technology (DRM-2). One example provides a computing device configured to receive a request from an application for a DRM-2 license acquisition challenge, forward the request to a DRM-2 license acquisition challenge generator, receive a DRM-2 license acquisition challenge and DRM-2 state information, send the DRM-2 license acquisition challenge to the application, receive, from the application, a DRM-2 license acquisition response, generate a DRM-1 license acquisition challenge incorporating the DRM-2 license acquisition challenge, the DRM-2 license acquisition response, and the DRM-2 state information, send the DRM-1 license acquisition challenge to a remote DRM-1 license acquisition server, receive a DRM-1 license acquisition response comprising a key and a license policy, enforce the license policy for content protection, and decrypt content using the key.

Presenting content protected by multiple DRMS

Supporting a plurality of content protection systems in a single container file. The protection systems share an encryption method which is accessible from a sample encryption box in the file. Each of the protection systems stores, in a protection system header box, information for decrypting the content in accordance with the corresponding protection system. In some embodiments, separate protection system header boxes in the file correspond to each of the protection systems. By using the common encryption method and sharing encryption expressions across the protection systems, the multiple content protection systems are supported in the file without creating additional copies of the content. In some embodiments, aspects of the disclosure extend the International Organization for Standardization (ISO) base media file format to support multiple digital rights management (DRM) systems in the single container file.

Multiple content protection systems in a file

Assembling streamed content for on-demand presentation is described. In embodiments, a media asset can be requested from a content distributor, and cacheable segments of the media asset are streamed to the requesting client device. The cacheable segments are received in an initial quality display format for uninterrupted playback of the media asset at the client device while the cacheable segments are being received. An asset matrix that correlates a bit rate and a time position for each cacheable segment in the media asset is also received. The cacheable segments of the media asset can be assembled according to the asset matrix to generate an assembled asset data file of the media asset. The assembled asset data file can then be back-filled with selected ones of the cacheable segments that are replaced with a highest quality display format for on-demand presentation of the media asset when selected for viewing.

Assembling streamed content for on-demand presentation

Request data is generated at a client device having at least one managed copy client application. The request data includes an identifier (e.g., a uniform resource locator, class ID, etc.) for an integration control (e.g., an ActiveX control, Java applet, etc.) installable on the client device. The request data is transmitted and, in response to the request data, response data (e.g., an object element in an HTML page) is received from a server (e.g., an e-commerce server). The response data facilitates installation of the integration control on the client device, and the integration control provides an interface to facilitate communication between the server and the managed copy client application.

Decoupled mechanism for managed copy client applications and e-commerce servers to interoperate in a heterogeneous environment

Various embodiments allow for managed copies of multimedia content to be made by end users. The managed copy process can ensure that end users can make legitimate and controlled copies of content while, at the same time, give content producers the ability to control and authorize such copies.

Growing community of inventors

North Bend, WA, United States of America

John Carl Simmons