In an example embodiment, a control connection is introduced between an adaptive jitter buffer and an adaptive bulk delay buffer of an echo canceller in an Internet Protocol conference bridge. In one embodiment, A volume leveler controller includes an audio content classifier for identifying the content type of an audio signal in real time; and an adjusting unit for adjusting a volume leveler in a continuous manner based on the content type as identified. The recess provides space for optional epitaxial silicon formation and suicide formation over the gate contact material without overflowing the tops of the sidewall spacers to minimize shorting between the gate and the sourcedrains in the finished transistor. Each pressing cylinder being controlled by one of the control units. When a decode start instruction is outputted during the first transfer of a picture, the second transfer of the picture is started at the transfer completion timing of the first transfer if a transfer completion timing of the second transfer comes before a transfer start timing corresponding to the display timing of a subsequent picture.