公开(公告)号：US10027303B2

公开(公告)日：2018-07-17

申请号：US15636840

申请日：2017-06-29

申请人： Snell Advanced Media Limited

发明人： Michael James Knee ,  Daniel Colgan ,  Maurice Snell

IPC分类号： H04H20/47 ,  H03G3/32 ,  H03G9/00 ,  H03G9/02

摘要： To control loudness during a junction between different types of broadcast content, such as a junction between program and commercial or promotional content, representative loudness values for content respectively before (P) and after (C) the junction are received from a playout automation system. A time-varying gain control is applied before and after the junction in order to smooth loudness around the junction. The audio gain is smoothly increased prior to the junction to a gain (P+C)/2P times higher than the original gain value. Then, the gain is reduced shortly before the junction to a value (P+C)/2C times lower than the original gain value. After the junction, the gain is returned smoothly to the original value.