Abstract: A method regulates transmission rate during a transmission of audio/video data over a network link between a sender and a receiver. The method comprises a first mode not using any return information from the receiver, executed at the start of the transmission, where the only possible modification to the transmission rate by the sender is an increase, and at least one second mode implemented following the first mode using at least one item of return information from the receiver. A change from the first mode to a second mode takes place when return information indicates that the transmission rate has reached a maximum rate available on the network link. The transmission rate is shared between a useful-data rate budget comprising the audio/video data and a secondary-data rate budget not necessary for the decoding of the audio/video data. The secondary budget is used for exploring the capacities of a network link.

Abstract: A method regulates transmission rate during a transmission of audio/video data over a network link between a sender and a receiver. The method comprises a first mode not using any return information from the receiver, executed at the start of the transmission, where the only possible modification to the transmission rate by the sender is an increase, and at least one second mode implemented following the first mode using at least one item of return information from the receiver. A change from the first mode to a second mode takes place when return information indicates that the transmission rate has reached a maximum rate available on the network link. The transmission rate is shared between a useful-data rate budget comprising the audio/video data and a secondary-data rate budget not necessary for the decoding of the audio/video data. The secondary budget is used for exploring the capacities of a network link.

Abstract: The invention relates to a method for coding a sequence of images, comprising the following steps: determining, for the image data, the prediction image data from reference image data, calculating residual data from image data and prediction image data, quantizing the residual data with a quantization step, reconstructing the image data into reconstructed image data, filtering the reconstructed image data according to at least one filtering parameter with a view to their use as reference image data, coding the quantized residual data, selecting a function representing the variations of at least one filtering parameter according to a quantization step value of a set of at least two functions from a predetermined value representative of a filtering intensity, determining the value of at least one filtering parameter from the function selected and the quantization step.

Abstract: The invention relates to a method for coding a sequence of images, comprising the following steps: determining, for the image data, the prediction image data from reference image data, calculating residual data from image data and prediction image data, quantizing the residual data with a quantization step, reconstructing the image data into reconstructed image data, filtering the reconstructed image data according to at least one filtering parameter with a view to their use as reference image data, coding the quantized residual data, selecting a function representing the variations of at least one filtering parameter according to a quantization step value of a set of at least two functions from a predetermined value representative of a filtering intensity, determining the value of at least one filtering parameter from the function selected and the quantization step.