Koninklijke Philips Corporation N.v.

Trident Microsystems (far East) Ltd.

Richard Matthew Miller-Smith

David E Penna

Colin King

Methods and access devices for collecting data from sensors of a wireless sensor network include transmitting a broadcast signal by a master device which currently collects the data and detected by other access devices. Handover of data collection control from the current master access device to an alternate access device is initiated based on a result of the detection. A handover request signal is received at the master device and a handover reply is signaled to a source device of the handover request signal. The handover reply indicates the time at which data collection is handed over from the current master access device to the source device. Thereby, the master device can be changed in a flexible manner based on current environmental conditions.

Handover mechanism for sensor networks

An MPEG decoder (-) can use different formats (linear tiled etc) for image data memory () for reference pictures when decoding subsequent pictures. Each format brings advantages and disadvantages. The disclosure illustrates that it is possible for different video sequences to have characteristics which match one image buffer format well, but not another, for example where there is a lot of motion or only a little motion between images. Advantageously, the decoder employs a parameterised image buffer format and analysis of the incoming stream and/or measured decoding performance () so as to dynamically choose () the best image buffer format for the current part of a stream. Cache control features can also be controlled () to suit the particular data received.

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Oxted, United Kingdom

Richard Matthew Miller-Smith