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公开(公告)号：US5455888A
公开(公告)日：1995-10-03
申请号：US985418
申请日：1992-12-04
CPC分类号： G10L21/038 , G10L19/0204 , G10L21/0232
摘要： A speech bandwidth extension method and apparatus analyzes narrowband speech sampled at 8 kHz using LPC analysis to determine its spectral shape and inverse filtering to extract its excitation signal. The excitation signal is interpolated to a sampling rate of 16 kHz and analyzed for pitch control and power level. A white noise generated wideband signal is then filtered to provide a synthesized wideband excitation signal. The narrowband shape is determined and compared to templates in respective vector quantizer codebooks, to select respective highband shape and gain. The synthesized wideband excitation signal is then filtered to provide a highband signal which is, in turn, added to the narrowband signal, interpolated to the 16 kHz sample rate, to produce an artificial wideband signal. The apparatus may be implemented on a digital signal processor chip.
摘要翻译： 语音带宽扩展方法和装置分析使用LPC分析以8kHz采样的窄带语音，以确定其频谱形状和反向滤波以提取其激励信号。 激励信号内插到16 kHz的采样率，并分析了音调控制和功率电平。 然后对产生白噪声的宽带信号进行滤波以提供合成的宽带激励信号。 确定窄带形状并将其与各矢量量化器码本中的模板进行比较，以选择各自的高频带形状和增益。 然后对合成的宽带激励信号进行滤波以提供高频带信号，该高频带信号又被加到窄带信号中，以16kHz采样率内插，以产生人造宽带信号。 该装置可以在数字信号处理器芯片上实现。
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公开(公告)号：US6041111A
公开(公告)日：2000-03-21
申请号：US980762
申请日：1997-12-01
申请人： Brian R. Shelton
发明人： Brian R. Shelton
IPC分类号： H04M1/247 , H04M1/2745 , H04M3/42
CPC分类号： H04M1/2471 , H04M1/274516 , H04M3/42
摘要： A method and apparatus for accessing data stored in a local telephone terminal from a remote terminal and displaying or storing it on the remote terminal. An ADSI or JAVA script or readable message is sent to the local telephone terminal, providing it with instructions about how to transmit and translate the data for use by the remote terminal. The method allows for password protection of the date and non-ringing of the local telephone terminal.
摘要翻译： 一种用于从远程终端访问存储在本地电话终端中的数据并将其显示或存储在远程终端上的方法和装置。 将ADSI或JAVA脚本或可读消息发送到本地电话终端，向其提供关于如何发送和转换数据以供远程终端使用的指令。 该方法允许密码保护本地电话终端的日期和非振铃。
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公开(公告)号：US5485514A
公开(公告)日：1996-01-16
申请号：US220653
申请日：1994-03-31
CPC分类号： H04S5/00 , H04M1/6016 , H04S7/30
摘要： A telephone instrument creates spatially simulated sound signals from signals received from a telephone line. The received signals are directed to left and right channels. In each channel, the signals are processed via a direct path, an early reflection path including a finite impulse response filter and a reverberant decay path including all-pass filter. In each channel, the outputs from the three paths are summed with different weights.
摘要翻译： 电话乐器根据从电话线接收的信号产生空间模拟的声音信号。 接收的信号被引导到左右声道。 在每个通道中，通过直接路径，包括有限脉冲响应滤波器的早期反射路径和包括全通滤波器的混响衰减路径来处理信号。 在每个通道中，来自三个路径的输出与不同的权重相加。
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