ANALYSIS FILTERBANK, SYNTHESIS FILTERBANK, ENCODER, DE-CODER, MIXER AND CONFERENCING SYSTEM
    1.
    发明申请
    ANALYSIS FILTERBANK, SYNTHESIS FILTERBANK, ENCODER, DE-CODER, MIXER AND CONFERENCING SYSTEM 有权
    分析滤波器,合成滤波器,编码器,解码器,混频器和会议系统

    公开(公告)号:US20080097764A1

    公开(公告)日:2008-04-24

    申请号:US11744641

    申请日:2007-05-04

    IPC分类号: G10L19/00

    摘要: An embodiment of an analysis filterbank for filtering a plurality of time domain input frames, wherein an input frame comprises a number of ordered input samples, comprises a windower configured to generating a plurality of windowed frames, wherein a windowed frame comprises a plurality of windowed samples, wherein the windower is configured to process the plurality of input frames in an overlapping manner using a sample advance value, wherein the sample advance value is less than the number of ordered input samples of an input frame divided by two, and a time/frequency converter configured to providing an output frame comprising a number of output values, wherein an output frame is a spectral representation of a windowed frame.

    摘要翻译: 一种分析滤波器组的实施例,用于对多个时域输入帧进行滤波,其中输入帧包括多个有序输入样本,包括配置成产生多个窗口化帧的加窗器,其中,窗口框架包括多个窗口样本 其中,所述加权器被配置为使用样本提前值以重叠的方式处理所述多个输入帧,其中所述样本提前值小于输入帧除以2的有序输入样本的数量,并且时间/频率 转换器,被配置为提供包括多个输出值的输出帧,其中输出帧是窗口化帧的频谱表示。

    WATERMARK SIGNAL PROVISION AND WATERMARK EMBEDDING
    5.
    发明申请
    WATERMARK SIGNAL PROVISION AND WATERMARK EMBEDDING 有权
    水印信号和水印嵌入

    公开(公告)号:US20130218314A1

    公开(公告)日:2013-08-22

    申请号:US13593016

    申请日:2012-08-23

    IPC分类号: G10L19/018

    摘要: A watermark signal provider provides a watermark signal suitable for being hidden in an audio signal when the watermark signal is added to the audio signal, such that the watermark signal represents watermark data. The watermark signal provider includes a psychoacoustical processor for determining a masking threshold of the audio signal; and a modulator for generating the watermark signal from a superposition of sample-shaping functions spaced apart from each other at a sample time interval of a time-discrete representation of the watermark data, each sample-shaping function being amplitude-weighted with a respective sample of the time-discrete representation, multiplied by a respective amplitude weight depending on the masking threshold, the modulator being configured such that the sample time interval is shorter than a time extension of the sample-shaping functions; and the respective amplitude weight also depends on samples of the time-discrete representation neighboring the respective sample in time.

    摘要翻译: 当水印信号被添加到音频信号时,水印信号提供器提供适于隐藏在音频信号中的水印信号,使得水印信号表示水印数据。 水印信号提供器包括用于确定音频信号的掩蔽阈值的心理声学处理器; 以及调制器,用于在水印数据的时间离散表示的采样时间间隔处从彼此间隔开的采样整形功能的叠加产生水印信号,每个采样整形功能用相应样本进行幅度加权 所述时间离散表示根据掩蔽阈值乘以相应的幅度权重,所述调制器被配置为使得所述采样时间间隔短于所述采样整形功能的时间延长; 并且相应的振幅权重也取决于相应样本在时间上相邻的时间离散表示的样本。