Abstract: Disclosed is a method in a network element of a communication network, which communication network is capable of transparently transferring coded data at least in some part of the communication network. The method includes detecting a need to change codec rate to a second codec rate in a downlink connection from the communication network to an end user device; receiving coded data destined to said end user device, which data is coded with a first codec rate, and starting, in response to said detecting, rate transformation for transforming codec rate of said data destined to the end user device into said second codec rate. Also disclosed are an apparatus, a system and a computer program.

Abstract: Disclosed is a method in a network element of a communication network, which communication network is capable of transparently transferring coded data at least in some part of the communication network. The method includes detecting a need to change codec rate to a second codec rate in a downlink connection from the communication network to an end user device; receiving coded data destined to said end user device, which data is coded with a first codec rate, and starting, in response to said detecting, rate transformation for transforming codec rate of said data destined to the end user device into said second codec rate. Also disclosed are an apparatus, a system and a computer program.

Abstract: The invention relates to a method for changing the size of a jitter buffer, which jitter buffer is employed at a receiving end in a communications system including a packet network for buffering received packets containing audio data in order to enable a compensation of varying delays of said received packets. In order to enable a faster change of the jitter buffer size it is proposed that in case it is determined that the current jitter buffer size has to be changed, the jitter buffer size is expanded by generating additional data based on the received data or decreased by compacting the received data. A proposed communications system, receiving end and processing unit include corresponding means. The invention equally relates to a method for time alignment in a radio communications system based on existing speech data. A further proposed communications system, transceiver unit and processing unit include the corresponding means.