Bitrate adaptation of a voice-over-IP communication session

A sender device of a communication terminal able to implement real-time communication sessions and comprising:

• a multi-bitrate encoder using a set of discrete bitrates, which comprises a packet transmission unit configured to implement, in response to a time delay reaching a threshold since a last adaptation request received from a receiver device, a test step of increasing an encoding bitrate by transmitting a current frame and at least one copy of a previous frame with a chosen redundancy offset.

A non-transitory computer-readable storage medium storing a computer program comprising instructions for executing an adaptation method when the instructions are executed by a processor of a sending device, wherein the instructions configure the sending device to:

• adapt an encoding bitrate of real-time signals of a real-time communication session between a sender device and a receiver device of communication terminals, the sender device comprising a multi-bitrate encoder using a set of discrete bitrates, by:
• implementing, in response to a time delay reaching a threshold since a last adaptation request received from the receiver device, a test step of increasing the encoding bitrate at the sender device by transmitting a current frame and at least one copy of a previous frame with a chosen redundancy offset.