Abstract: Circuitry for providing an output video signal from a portable device to an external display, the circuitry including a processor block with an image processor, and a video encoder block with a video encoder for providing the output video signal to the external display, the processor block and the video encoder block being connected to each other by a serial interface arranged to provide image date from the processor block to the video encoder, the serial interface having at least one data lane and at least one first clock lane, wherein the video encoder block includes a first input connected to the at least one data lane for receiving image data and a second input connected to the at least one first clock lane for receiving a first clock signal, and wherein at least one of the video encoder block and the processor block has a third input arranged to receive a control signal for controlling data flow over the serial interface.

Abstract: This invention relates to a matrix for switching between two time-division multiplex groups, including three areas for buffering the data arriving in multiplex onto input junctions, which issue these data in multiplex to output junctions according to an assignment of each time slot of an input multiplex to a time slot of an output multiplex, a first area being meant for receiving the data relative to the transmissions as they are issued by a series-to-parallel converter receiving the input junctions and for enabling, at least when the data belong to a transmission channel including several time slots of a same multiplex, a transfer of the data to one of the two other buffer areas according to the parity of the multiplex frame it contains.