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51. 发明授权

US06839380B1 Robust detection for embedded signaling 有权
标题翻译：嵌入式信号的鲁棒检测
公开(公告)号：US06839380B1
公开(公告)日：2005-01-04
申请号：US09638221
申请日：2000-08-14
申请人： Yinong Ding , Anand G. Dabak , Edwin R. Cole
发明人： Yinong Ding , Anand G. Dabak , Edwin R. Cole
IPC分类号： H04B1/707 , H04B1/69
CPC分类号： H04B1/7093 , H04L7/0029 , H04L7/007
摘要： This patent disclosure describes an effective synchronization technique for an embedded signaling system based on direct sequence spread spectrum technology. The technique provides an approach to robust detection of information codes embedded in an audio signal which is subject to undergoing such processes as re-recording of the material onto a different media, and conversions from digital to analog form and from analog to digital form. The technique is useful in preventing the embedded information from being corrupted or obscured by pirates via signal distortion operations including D/A and A/D conversions or by legitimate users in artistic processing of the material. The technique according to one embodiment of the present invention includes obtaining a timing error estimate in the process of synchronization by estimating the initial sampling rate/timing error by peak picking and by restoring the correct timing by sample interpolation after synchronization.
摘要翻译：该专利公开描述了基于直接序列扩频技术的嵌入式信令系统的有效同步技术。该技术提供了对嵌入在音频信号中的信息代码的鲁棒检测的方法，该信号代码经受诸如将材料重新记录到不同介质上的过程，以及从数字到模拟形式和从模拟形式到数字形式的转换。该技术有助于防止嵌入信息被海盗通过信号失真操作（包括D / A和A / D转换）或合法用户在艺术处理中被损坏或掩盖。根据本发明的一个实施例的技术包括：通过采用峰值采样估计初始采样率/定时误差，并通过同步后的采样插值恢复正确定时来获得同步过程中的定时误差估计。

52. 发明授权

US06591230B1 Coprocessor for synthesizing signals based upon quadratic polynomial sinusoids 有权
标题翻译：基于二次多项式正弦波合成信号的协处理器
公开(公告)号：US06591230B1
公开(公告)日：2003-07-08
申请号：US09687546
申请日：2000-10-13
申请人： Yinong Ding , Ching-yu Hung
发明人： Yinong Ding , Ching-yu Hung
IPC分类号： G06F300
CPC分类号： G06F1/0328
摘要： A coprocessor (15) for synthesizing a signal from the sum of sinusoids preferably includes an electronic system (20) having a host processor (12) that forwards frame boundary parameters to the coprocessor (15). Parameter registers (26) in coprocessor (15) store synthesis parameters for iteratively deriving amplitude and phase values for each sample point within a data frame. Adders (28, 30, 32) generate current amplitude from one addition, and current phase value from two additions, with the results stored back into parameter registers (26). A sine function calculator circuit (34), which may use a CORDIC technique, receives the current amplitude and phase values, and generates a digital component signal for the current sample point for one of the sinusoids. Digital component signals are accumulated at the sample point in a data sample buffer (40) and output at an output (44).
摘要翻译：用于从正弦曲线的和合成信号的协处理器（15）优选地包括具有将帧边界参数转发到协处理器（15）的主处理器（12）的电子系统（20）。协处理器（15）中的参数寄存器（26）存储用于迭代地导出数据帧内每个采样点的幅度和相位值的合成参数。加法器（28,30,32）从一次加法产生电流幅度，并从两次加法产生电流相位值，结果存储回参数寄存器（26）。可以使用CORDIC技术的正弦函数计算器电路（34）接收当前的幅度和相位值，并且为一个正弦波产生用于当前采样点的数字分量信号。数字分量信号在数据采样缓冲器（40）中的采样点累积，并在输出（44）处输出。

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