Nokia Corporation

Nokia Mobile Phones Limited

Vesa Lunden

Marko Luomi

Matti Jokimies

Markus Tapani Hakaste

Juha T Rinne

Jari M Liukkonen

Pasi Rantanen

Yulian Wang

A method of controlling an establishment of a multimedia call between at least two communication equipments, a corresponding system, and a corresponding communication equipment comprise a set up of a bearer connection resulting in a creation of a data transmission channel between at least two communication equipments. A data stream is transmitted between the at least two communication equipments after the creation of the data transmission channel for maintaining synchronization of the data transmission channel. Predefined information elements are introduced in the data stream, wherein the predefined information elements indicate local protocol settings for the multimedia call. The predefined information elements are recognized from the data stream, and parameters of an application protocol used for the multimedia call are adjusted on the basis of the predefined information elements.

Multimedia call control mechanism and communication equipment using the same

A mobile terminal includes means for controlling the encoding of a digital video signal that further includes means for monitoring at least one parameter of a radio frequency communication signal received at the mobile terminal. The control means also includes a means for forming a signal to the monitored parameter for controlling at least one encoding parameter of the video encoder.

Method and apparatus for controlling encoding of a digital video signal according to monitored parameters of a radio frequency communication signal

A method and system for transmitting an alternative video or multimedia data file during an interrupted video transmission in, for example, a mobile video telephony system. In a first aspect of the invention, the method includes interrupting the video signal ( ) which then automatically initiates downloading of a video data file from a storage medium ( ) into a memory ( ) for transmission to viewers over the mobile telephony system during the interruption in the video transmission. In a second aspect, a pre-encoded multimedia data file is stored on a storage medium ( ) and downloaded into the video telephony system for playback to viewers during the interruption thereby providing a more enjoyable and possibly more informative viewing experience. In a third aspect, a software generated image is produced ( ) and transmitted to viewers in lieu of the interrupted video transmission.

Method and system for providing and transmitting alternative video data during interruptions in video transmissions

Method and apparatus for controlling the operation of a video codec designed for encoding video data suitable for radio transmission between a network and a mobile station. The invention is particularly applicable where the transmission errors are unpredictable, and entails monitoring one or more parameters of the received or transmitted signal and providing a feedback signal based on the monitored signal, the feedback signal controlling the encoding parameters in the algorithm of the video codec.

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Lempäälä, Finland

Vesa Lunden