Orange

France Telecom

Viaccess

Claudia Becker

Olivier Vivolo

Sylvain Kervadec

Chantal Guionnet

Michel Veillard

Pierre Fevrier

André Codet

Benoit Besset

Jean-Pierre Vigarie

Benoît Besset

A method for synchronising a first audio stream, reproduced in the form of a sound signal by a reproduction device near a terminal, with an alternative audio stream received by the terminal. The terminal also receives a control stream representing the first audio stream reproduced on the reproduction device, the control stream and the alternative audio stream being synchronised according to a single time reference. the method includes: capturing a portion of the sound signal; transmitting to the reproduction device a command to suspend the reading of the first stream; obtaining a first data item representing at least one portion of the captured sound signal; detecting the first data item in the control stream and, when the first data item is detected in the control stream, transmitting to the reproduction device a command to resume reading the first stream; and reproducing the alternative audio stream received by the terminal.

Method for synchronizing an alternative audio stream

A method is provided for accessing a multimedia content containing at least one data segment. This data segment is accessible via a document describing the content. The method includes a first step of obtaining the document describing the content, from which document at least a first universal address of a segment is generated; a second step of obtaining at least one parameter associated with the universal address of the document describing the content; a step of reading at least one address generator rule in the document describing the content; and as a function of the address generator rule, of the first universal address of the segment, and of the parameter that has been obtained, a last step of generating the second universal address for the segment. Also provided is a method of generating a document that is suitable for use in the context of the access method.

Inheritance of universal resource identifier (URI) parameters

A method and apparatus are provided for controlling use of content protected with a digital rights management license which contains conditions for the use. When a request to use the content is received by a client agent controlling the use of the content, the conditions of use are checked. Within this check, a determination is made that the use of the content is conditional upon an obligation to perform a parental control operation on the content. A request for authorization to use the content is then transmitted from the controlling client agent to a parental control management module. After a parental control operation has been performed on the content by the parental control management module, the agent receives a result of the parental control operation. If the result is negative, a denial of use of the content is notified in response to the request to use the content.

Method and client agent for monitoring the use of protected content

The invention relates to a protocol for disabling/erasing access rights to scrambled data. According to the invention, the access rights entered in an access control module comprise the following variables: right identification variable (R ID), action date variable (AD V) and right status variable (S V). The status variable can have one of three encoded values, namely enabled, disabled or erased right. The inventive protocol consists in: transmitting (A) at least one access right management message comprising the right identification variable (R ID), the action date variable (AD V) and the status assignment variable (S V), the latter corresponding to a enabled, disabled or erased right; assigning (B) the action date (AD V) of the message to the action date (AD V) of the right entered; and allocating (C) the status assignment variable (S V) of the message, corresponding to an enabled, disabled or erased access right, to the status variable (S V) of the entered access right. The invention is suitable for pay television.

Protocol for entering, disabling and/or erasing scrambled data access rights and the corresponding access control module

Growing community of inventors

Rennes, France

Claudia Becker