France Telecom

France Telecom Sa

Maher Hamdi

Francois Toutain

James Roberts

Pierre Rolin

Rolin Pierre

A system and a process arranges equitable-loss data packets in a high-volume asynchronous transfer mode (ATM) system and establishes the output order of the packets. There are a plurality of inflowing data packet streams, a minimum quantity r of each incoming flow being reserved. At all times, there is a ratio K(t) between two parts of each incoming data packet flow. One part is a quantity of packets &Dgr;x (t) allocated above the minimum reserve quantity r . The other part e (t) is an instantaneous quantity &Dgr;x (t) above the minimum reserve quantity r .

Process for the arrangement of equitable-loss packets

A process for controlling the output flow rate of a coder of digital data representative of sequences of images, the coding effected by the coder including a quantization stage of quantization parameter Q, the sequences of images being made up of successive groups of images. The process consists of determining, at the moment of the presence of the i group of images at the output of the coder, the quantization parameter Q(i+1) for the coding of the (i+1) group of images so that the flow rate at the output of the coder conforms with a version of a leaky bucket defined by a size M and by a leakage rate .lambda. in terms of the activity of the scene represented by the i group of images.

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Tunisia, France

Maher Hamdi