Thomson Licensing

Interdigital Ce Patent Holdings

Thomson Licensing Dtv

Interdigital Madison Patent Holdings, Sas

Renaud Rigal

Thierry Quere

Olivier Courtay

Nicolas Caramelli

Jean-François Lagardere

Nicolas Debomy

Aurélien Longet

Florent Fresnaye

Francois-Xavier Seingier

Pascal Baudeloche

Eric Desmicht

Theirry Quere

François-Xavier Seingier

After a stream transition event such as a channel change, a drift between audio and video presentation time stamps in an audio/video stream is determined. The thus determined drift serves to compute a duration of a slow video motion start sequence with a given slow video rate, so that video can be shown early without yet being synchronized with audio. The slow video motion start enables the audio to catch up with the video and allows to ensure a synchronization of audio with video after the duration of the slow video motion start sequence, where after video and audio are synchronized and evolve normally. The present principles use a single decoder clock that is fed to the audio and video decoders, the decoder clock fed to the video decoder being offset with a decreasing value during the period of slow video motion.

Method for decoding an audio/video stream and corresponding device

A method for managing cache memory in a user device is disclosed. The method comprises stagewise excluding adding data to the cache memory as cache memory fill level increases, the stagewise excluding comprising determining, for each successive stage of cache memory fill level, exclusion of the data from being added to the cache memory according to rules of exclusion of adding of data to the cache memory that are increasingly restrictive.

Method of optimization of cache memory management and corresponding apparatus

A method, arrangement and device comprising the arrangement enabling to determine if audio data is present in a digital audio/video stream. If presence of audio data is determined and audio is muted and/or below a determined level, a visual indication is generated which indicates the presence of audio data in the digital audio/video stream.

Method for audio detection and corresponding device

In a video delivery environment where a channel change in an audio/video receiver starts with a burst delivery of an audio/video stream to the receiver, characteristics of the audio/video stream are determined such as audio-video drift and burst characteristics in terms of duration of excess data delivery. At least one of these characteristics determines an offset to add to an initialization of a decoder clock, so that moving images are shown as early as possible after receipt of the channel change command, to be joined by lip synchronized audio before burst end.

Method for fast channel change and corresponding device

The invention proposes a method of display of a user interface, that comprises the following steps: a step of display in foreground of a first user interface generated from stored display elements, comprising a first set of display elements providing access to first services, a reception step of a second set of display elements giving access to second services, and a display step of a second user interface in foreground, replacing the first user interface. The invention also relates to a method of transmission of a set of display elements giving access to services, that comprises the following steps: a transmission step of a first set of display elements, giving access to services, and a transmission step of a second set of display elements, giving access to services, and destined to be stored.

Method of display of a user interface and corresponding transmission method

The present invention generally relates to digital communications, and more particularly, to a technique for processing data in a digital communication device so as to reduce channel change times. To this effect, the invention comprises a specific sequencing and arrangement of operations that are required to be executed in the digital communication device during a channel change.

Method of digital audio/video channel change and corresponding apparatus

A device for generating an encrypted master key. The device comprises at least one input interface configured to receive a receiver identifier, a service provider identifier and a master key for the service provider; a memory configured to store a secret of the device; a processor configured to: process the receiver identifier using the secret to obtain a root key, process the service provider identifier using the root key to obtain a top key and process the master key using the top key to obtain an encrypted master key; and an output interface configured to output the encrypted master key. Also provided is a method for providing an encrypted master key to a receiver. An advantage is that the device can enable a new service provider to provide services to a receiver using an already deployed smartcard.

Device for generating an encrypted key and method for providing an encrypted key to a receiver

Method for receiving audio and/or video services and an automatic selection step of audio or audio/video services. In order to optimise access to varied services, the method comprises:

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Cesson-Sevigne, France

Renaud Rigal