发明名称 |
Apparatus and method for including codes in audio signals |
摘要 |
<p>An apparatus and method for including a code having at least one code frequency component in an audio signal are provided. The ability of an audio signal frequency component to mask a code frequency component to human hearing when the audio signal is reproduced as sound during a first time interval and the code frequency component is reproduced as sound during a second time interval offset from the first interval is evaluated. An amplitude is assigned to the code frequency component based on the masking evaluation and is included within a portion of the audio signal within the second time interval.
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申请公布号 |
EP1978658(A3) |
申请公布日期 |
2013.08.07 |
申请号 |
EP20080009783 |
申请日期 |
1995.03.27 |
申请人 |
ARBITRON INC. |
发明人 |
JENSEN, JAMES M.;LYNCH, WENDELL D.;PERELSHTEYN, MICHAEL M.;GRAYBILL, ROBERT B.;HASSAN, SAYED;SABIN, WAYNE |
分类号 |
H04N5/38;H04N7/08;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 |
主分类号 |
H04N5/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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