Method for regulating the bit rate during a transmission of audio/video data over a network link between a transmitter and a receiver, said method being implemented when the transmitter receives items of information representative of the transmission that are transmitted by the receiver, characterized in that the method is implemented by the transmitter and comprises: a plurality of bit rate regulation modes comprising a first bit rate regulation mode, which is put into effect when the transmission begins and in which the only possible change in the bit rate at which the transmitter transmits is an increase, each value by which the bit rate is increased being determined without taking into account any item of information representative of the transmission, and at least one second regulation mode, which is implemented after the first mode and in which at least one of the items of information representative of the transmission is used to increase or reduce the transmission bit rate, a transition from the first mode to a second mode occurring when one of the items of information representative of the transmission indicates that the transmission bit rate has reached a maximum bit rate available on the network link; said transmission bit rate being split between a bit rate budget for payload data comprising the audio/video data, which is known as the payload budget, and a bit rate budget for secondary data that are not needed for decoding the audio/video data, which is known as the secondary budget, only the secondary budget being increased when the transmission bit rate is increased, the payload budget being increased only when no item of information representative of the transmission that is received after an increase in the secondary budget indicates an increased risk of data loss. a plurality of bit rate regulation modes comprising a first bit rate regulation mode, which is put into effect when the transmission begins and in which the only possible change in the bit rate at which the transmitter transmits is an increase, each value by which the bit rate is increased being determined without taking into account any item of information representative of the transmission, and at least one second regulation mode, which is implemented after the first mode and in which at least one of the items of information representative of the transmission is used to increase or reduce the transmission bit rate, a transition from the first mode to a second mode occurring when one of the items of information representative of the transmission indicates that the transmission bit rate has reached a maximum bit rate available on the network link; said transmission bit rate being split between a bit rate budget for payload data comprising the audio/video data, which is known as the payload budget, and a bit rate budget for secondary data that are not needed for decoding the audio/video data, which is known as the secondary budget, only the secondary budget being increased when the transmission bit rate is increased, the payload budget being increased only when no item of information representative of the transmission that is received after an increase in the secondary budget indicates an increased risk of data loss.