Telefonaktiebolaget Lm Ericsson (publ)

St-ericsson Sa

Leland Stanford Junior University

Deutschetelekom Ag

Frank Hartung

Daniel Catrein

Markus Kampmann

Johannes Willig

Yi Cheng

Thomas Rusert

Silke Holtmanns

Rene Rembarz

Ulf Björkengren

Frederic Gabin

Thorsten Lohmar

Mats Näslund

Frank Hundscheidt

Göran Selander

Uwe Horn

Ulf Christian Bjorkengren

Jatinder Pal Singh

Michael Liljenstam

Bernd Girod

Mattias Eld

Martin Gerdes

Andreas Schieder

Ignacio Mas Ivars

Jeonghun Noh

Marko Schuba

Nilo Mitra

Laurits Hamm

Minar Makar

Daniel Cantrein

Emmanuel Courbier

Systems and methods of controlling transmissions of a media stream are provided. In one exemplary embodiment, a method performed by a media client for controlling a transmission of a media stream from a media server to the media client may include obtaining a media description of the media stream. The media description may indicate an initial stream element of the consecutive stream elements. Further, the method may include sending a request for the initial stream element. In addition, the method may include requesting, towards a control entity for a session, an establishment of the session or a modification of the session, for associating the media stream with the session. After sending the request for the initial stream element, the method may include receiving a result of the session establishment or session modification request.

Session control for media stream transmission

Methods and devices for providing a media description of a media stream to a client are described. The client is subscribed to a media description delivery service. The media description delivery service comprises a media description delivery rule. A request for a media description delivery is sent to a media server. From the media server a media description is received. It is verified that the received media description complies with the media description delivery rule and if the verification is in the affirmative, a delivery of the media description is initiated to the client.

Methods and devices for media description delivery

A technique for registering a device () with a rights issuer system () in a digital rights management (DRM) context is described. The device () is provided with DRM registration information that is required to use protected content. The DRM registration information is generated from rights issuer information on the one hand and device information on the other hand. The DRM registration technique described herein does not require an interactive registration protocol between a rights issuer server () and the device (). Rather, the DRM registration information may be generated and transferred to the device () even if the device () is offline, inactive or switched-off.

Technique for registering a device with a rights issuer system

Synchronizing cameras, connected via a telecommunication network, for capturing a multi-view session can be controlled by a synchronization module. The synchronization module determines a multi-view capturing parameter from a capturing parameter that is received from at least one camera. The multi-view capturing parameter is provided by the synchronization module to the cameras participating in the capturing session in order to synchronize the capturing of the multi-view session. Further, a camera device informs the synchronization module of the disposability and capturing parameter of the camera. The camera receives the multi-view capturing parameter for use in capturing the session.

Synchronization of cameras for multi-view session capturing

A method is described for streaming video data within a network, wherein the video data includes a sequence of frames. The method includes encoding the sequence of frames and generating a plurality of substreams from the encoded frames in this embodiment. Each of the plurality of substreams is assigned an identifier, and each substream includes a common encoded frame and a non-overlapping portion of the encoded sequence. The non-overlapping portion of the encoded sequence of each substream is selected from the encoded frames based on the identifier of the respective substream. The method also includes transmitting the plurality of substreams to a receiver in an embodiment.

Distributed transcoding of video frames for transmission in a communication network

A method for controlling the transmission of a media stream comprising a plurality of consecutive stream elements Is described. The method comprises the step of obtaining () a media description of the media stream, the media description indicating an initial element of the stream elements. A request for the initial stream element is sent () and a session control procedure is initiated () for a session. The media stream is associated () with the session in the session control procedure. The transmission of a subsequent element of the stream elements is controlled in accordance with a control rule of the session. Devices and further methods embodying the invention are also described.

Imposing one or more usage constraints on digital content involves communicating a digital content data item to a digital content receiver system. The digital content data item includes the digital content and a usage constraint data item different from a digital license data item, or a reference to the usage constraint data item, the use case item being indicative of the one or more usage constraints.

Method and device for imposing usage constraints of digital content

A method for establishing a secured communication channel, between a first processing component and a second processing component; the method comprising executing a digital rights management agent on a processing unit, the digital rights management agent being configured to enforce permissions associated with digital content based on a digital rights management protection mechanism; receiving, by the digital rights management agent at least a security data item, the security data item including a session key data item; verifying authenticity of the received session key data item by the digital rights management agent using said digital rights management protection mechanism; providing the verified session key data item by the digital rights management agent to at least the second processing component; establishing a secured communication channel between the first and second processing components using at least the provided session key data item.

Method and device for communicating digital content

A device for use in a multimedia conferencing system comprises an audio analysis processor (), a session type classification processor () and a user interface controller (). The audio analysis processor () is configured to analyze audio data of a communication session with multiple participating endpoints. The session type classification processor () is configured to determine a type of the communication session on the basis of the analysis of the audio data. The user interface controller () is configured to control a representation of the endpoints in a user interface on the basis of the determined type of the communication session, e.g., by sending control data (CD) to the endpoints.

User interface control in a multimedia conference system

A technique for controlling a play-out of a media data stream at a receiving device is provided. The media data stream comprises one or more programs, and each program comprises one or more program components. In a method implementation of the technique, a zone description is defined. The zone description is defined for a media zone for at least one program or at least one program component in the media stream and identifies the media zone for the at least one program or the at least one program component. In a next step, the zone description is associated to a program specific information data segment. The program specific information data segment is part of the media stream and comprises data specifying information at least regarding to the at least one program or at least one program component. The method also comprises transmitting the media data stream towards the receiving device.

Play-out control for a media data stream

A method for control ling information object () usage in a network of information () wherein information objects () are identified by information object identities and locations of the information objects () are indicated by location pointing information, the method comprising receiving () an encrypted information object (), sending () to a resolution node (D) a request for location pointing information of a key issuing node (D), the request comprising an identity of the received information object (), receiving () the location pointing information of the key issuing node (D), sending () to the key issuing node (D) a request for an access key () for decrypting the encrypted information object (), the request comprising the identity of the received information object (), receiving () the access key (), and decrypting () the received encrypted information object () with the received access key ().

Key distribution scheme for networks of information

The embodiments of the present invention relate to apparatuses, in terms of a client device () and a server () and to methods in the client device () and in the server () respectively for enabling a user to consume content provided by a content provider. According to the method in the client device () the method comprises: assembling a request for rights for consuming a content and indicating in the request which content to consume; determining if an upgrade key, associated with the content, is present in the client device; including, in such a case, in the request, an identifier of the upgrade key that is associated with the content, sending the request to the content provider; receiving, a response comprising an encrypted rights object; decrypting the encrypted rights object and starting to use the rights object for consuming the content.

Growing community of inventors

Herzogenrath, Germany

Frank Hartung