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METHOD AND APPARATUS FOR INCREASING THE STRENGTH OF PHASE-BASED WATERMARKING OF AN AUDIO SIGNAL

机译：基于相位的音频信号水印强度增强的方法和装置

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摘要

A challenge of audio watermarking systems in which an acoustic path is involved is the robustness against microphone pickup in case of surrounding noise. The strength of phase-based watermarking is increased by determining (92) a masking threshold (LT_g[i]) for a current frequency bin in a frequency/phase representation (X̃_n), changing (93) the phase (ϕ[i]) based on that masking threshold and an allowed phase change value (δϕ[i]), calculating (913) an allowed magnitude change value (δX[i]) for the current frequency bin and calculating (911) from an audio quality level value (level) a magnitude change scaling factor (f) for the magnitude change value, and increasing (914) its magnitude accordingly.

机译：涉及声路径的音频水印系统的挑战是在周围噪声情况下抵抗拾音器的坚固性。通过确定（92）当前频点的屏蔽阈值（ LT _{g [ i ]），可以提高基于相位的水印强度以频率/相位表示（ X̃ _{n ），改变（93）相位（ ϕ [ i ] ）基于该掩蔽阈值和允许的相位变化值（ δϕ [ i ]），计算（913）允许的幅度变化值（δX [ i ]），然后从音频质量级别值（level）计算（911）幅度变化的比例因子（f）值，并相应增加（914）其大小。}} 展开▼

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公开/公告号EP3109860A1

专利类型

公开/公告日2016-12-28

原文格式PDF

申请/专利权人 THOMSON LICENSING;
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申请/专利号EP20150306014

发明设计人 ARNOLD MICHAEL;BAUM PETER GEORG;CHEN XIAOMING;GRIES ULRICH;
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申请日2015-06-26

分类号G10L19/018;

国家 EP

入库时间 2022-08-21 14:02:16

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