公开(公告)号：EP0753226A4

公开(公告)日：2000-08-16

申请号：EP95914900

申请日：1995-03-27

申请人： ARBITRON CO

发明人： JENSEN JAMES M ,  LYNCH WENDELL D ,  PERELSHTEYN MICHAEL M ,  GRAYBILL ROBERT B ,  HASSAN SAYED ,  SABIN WAYNE

IPC分类号： H04N5/38 ,  G10L19/00 ,  G11B20/10 ,  H04H20/31 ,  H04H60/13 ,  H04H60/17 ,  H04H60/37 ,  H04H60/40 ,  H04H60/44 ,  H04H60/45 ,  H04H60/58 ,  H04H60/63 ,  H04H60/66 ,  H04M11/06 ,  H04N5/60 ,  H04H9/00 ,  H04N7/08

CPC分类号： H04H20/31 ,  H04H20/14 ,  H04H60/13 ,  H04H60/17 ,  H04H60/37 ,  H04H60/40 ,  H04H60/44 ,  H04H60/45 ,  H04H60/58 ,  H04H60/63 ,  H04H60/66 ,  H04K1/02 ,  H04L27/10 ,  H04L27/30

摘要： Apparatus and methods for including a code (68) having at least one code frequency component in an audio signal (60) are provided. The abilities of various frequency components in the audio signal to mask the code frequency component to human hearing are evaluated (64), and based on these evaluations an amplitude (76) is assigned to the code frequency component. Methods and apparatus for detecting a code in an encoded audio signal are also provided. A code frequency component in the encoded audio signal is detected based on an expected code amplitude or on a noise amplitude within a range of audio frequencies including the frequency of the code component.

公开(公告)号：EP0712558A4

公开(公告)日：1999-09-08

申请号：EP94922519

申请日：1994-07-12

申请人： ARBITRON CO

发明人： BROOKS JON RANDALL ,  JENSEN JAMES M ,  MCCONOCHIE ROBERTA M ,  OSBORN SUSAN V ,  PEARL AMY E ,  SCHMIDT CAROLE M ,  SEILER ANN B ,  STOWELL CAROL P ,  WHITE THOMAS W ,  WONG WYLIE

IPC分类号： H04H1/00 ,  H04H60/32 ,  H04H60/38 ,  H04H60/45 ,  H04H60/63 ,  H04N7/16

CPC分类号： H04H60/63 ,  H04H60/32 ,  H04H60/38 ,  H04H60/45 ,  H04N7/165

摘要： A system and method are provided for promoting use by an audience member of a portable broadcast exposure monitoring and/or recording device (100) in accordance with a predetermined usage criterion. A sense signal (134, 136, 138) is provided indicating whether the device is being carried with the person of the audience member, and a time signal (118) corresponding with the sense signal is also provided. An indication (142, 144, 146, 148) to the audience member of whether the audience member's usage of the device has been in accordance with the predetermined usage criterion is provided based on the sense signal and the corresponding time signal.