公开(公告)号：US06343101B1

公开(公告)日：2002-01-29

申请号：US09008101

申请日：1998-01-16

申请人： Ping Dong ,  Kuo-Yu Lin

发明人： Ping Dong ,  Kuo-Yu Lin

IPC分类号： H04B1404

CPC分类号： H04B14/04

摘要： A spectral shaping PCM modem communication system uses a symbol encoder to encode a data bit stream into a PCM symbol stream. A plurality of different frames are formed from the PCM symbol stream. Performance metrics are computed for each possible frame and its inversion so a decision can be made in order to select a most desirable frame and inversion. Delays are injected in the data flow to allow a look-ahead and thus provide for better frame selection and inversion decisions. A channel multiplexer combines decision bits and output frames to form encoded output frames that are fed to a digital channel connected to a telephone network wherein they are converted to analog signal. A corresponding decoder converts analog signals from the telephone network to digital signals. A timing recovery and equalization means corrects sample timing and removes inter-symbol interference effects introduced by telephone networks. The output of the equalizer is sampled at correct timing to recover the received samples and received frame. A channel de-multiplexer separates the frame selection and frame inversion decision bits from the symbol frames received. Inversion and framing decisions are discerned from the demultiplexed frame selection and frame inversion decision bits. Original PCM symbol frames are reconstructed and PCM symbols are decoded into a data bit stream. A non-negative shell mapping may be used as the symbol encoder. A decoder checks to see if a currently received frame is negative. If it is, then all samples in such current frame are inverted. Otherwise, all samples in the current frame are unchanged. The resulting frames are then forwarded to a non-negative shell mapping decoder for eventual reconversion to digital data.

摘要翻译： 频谱整形PCM调制解调器通信系统使用符号编码器将数据比特流编码成PCM符号流。 从PCM符号流形成多个不同的帧。 对于每个可能的帧及其反演来计算性能度量，以便可以做出决定以选择最理想的帧和反演。 在数据流中注入延迟以允许先行，从而提供更好的帧选择和反演决策。 信道多路复合器组合决策位和输出帧以形成被馈送到连接到电话网络的数字信道的编码输出帧，其中它们被转换为模拟信号。 相应的解码器将来自电话网络的模拟信号转换成数字信号。 定时恢复和均衡意味着校正采样定时并消除电话网络引入的符号间干扰效应。 在正确的定时对均衡器的输出进行采样，以恢复接收到的采样和接收的帧。 信道解复用器将帧选择和帧反转决策位与接收的符号帧分离。 从解复用的帧选择和帧反转决定位中辨别反转和成帧决策。 原始PCM符号帧被重建并且PCM符号被解码成数据比特流。 可以使用非负外壳映射作为符号编码器。 解码器检查当前接收的帧是否为负。 如果是，则当前帧中的所有样本都被反转。 否则，当前帧中的所有样本都不变。 然后将所得到的帧转发到非负壳映射解码器，以最终重新转换为数字数据。

公开(公告)号：US06463103B1

公开(公告)日：2002-10-08

申请号：US09657769

申请日：2000-09-08

申请人： Ping Dong ,  Kuo-Yu Lin

发明人： Ping Dong ,  Kuo-Yu Lin

IPC分类号： H04B1404

CPC分类号： H04B14/04

摘要： A spectral shaping PCM modem communication system uses a symbol encoder to encode a data bit stream into a PCM symbol stream. A plurality of different frames are formed from the PCM symbol stream. Performance metrics are computed for each possible frame and its inversion so a decision can be made in order to select a most desirable frame and inversion Delays are injected in the data flow to allow a look-ahead and thus provide for better frame selection and inversion decisions. A channel multiplexer combines decision bits and output frames to form encoded output frames that are fed to a digital channel connected to a telephone network wherein they are converted to analog signal. A corresponding decoder converts analog signals from the telephone network to digital signals. A timing recovery and equalization means corrects sample timing and removes inter-symbol interference effects introduced by telephone networks. The output of the equalizer is sampled at correct timing to recover the received samples and received frame. A channel de-multiplexer separates the frame selection and frame inversion decision bits from the symbol frames received. Inversion and framing decisions are discerned from the demultiplexed frame selection and frame inversion decision bits. Original PCM symbol frames are reconstructed and PCM symbols are decoded into a data bit stream. A non-negative shell mapping may be used as the symbol encoder. A decoder checks to see if a currently received frame is negative. If it is, then all samples in such current frame are inverted. Otherwise, all samples in the current frame are unchanged. The resulting frames are then forwarded to a non-negative shell mapping decoder for eventual reconversion to digital data.

摘要翻译： 频谱整形PCM调制解调器通信系统使用符号编码器将数据比特流编码成PCM符号流。 从PCM符号流形成多个不同的帧。 针对每个可能的帧及其反演来计算性能度量，以便可以做出决定以便选择最理想的帧和反演延迟被注入到数据流中以允许先行，从而提供更好的帧选择和反演决策 。 信道多路复合器组合决策位和输出帧以形成被馈送到连接到电话网络的数字信道的编码输出帧，其中它们被转换为模拟信号。 相应的解码器将来自电话网络的模拟信号转换成数字信号。 定时恢复和均衡意味着校正采样定时并消除电话网络引入的符号间干扰效应。 在正确的定时对均衡器的输出进行采样，以恢复接收到的采样和接收的帧。 信道解复用器将帧选择和帧反转决策位与接收的符号帧分离。 从解复用的帧选择和帧反转决定位中辨别反转和成帧决策。 原始PCM符号帧被重建并且PCM符号被解码成数据比特流。 可以使用非负外壳映射作为符号编码器。 解码器检查当前接收的帧是否为负。 如果是，则当前帧中的所有样本都被反转。 否则，当前帧中的所有样本都不变。 然后将所得到的帧转发到非负壳映射解码器，以最终重新转换为数字数据。

公开(公告)号：US20090052686A1

公开(公告)日：2009-02-26

申请号：US11843692

申请日：2007-08-23

申请人： Li-Te Wu ,  Yu-De Tsai ,  Yi-Wen Chen ,  Sung-Kai Yang ,  Kuo-Yu Lin

发明人： Li-Te Wu ,  Yu-De Tsai ,  Yi-Wen Chen ,  Sung-Kai Yang ,  Kuo-Yu Lin

IPC分类号： H04R3/00

CPC分类号： H04R1/406 ,  H04R2430/20 ,  H04R2499/11

摘要： An electronic device includes a front cover, a circuit board, a plurality of flexible boots, a plurality of microphones, and an abutting mechanism. The front cover includes a plurality of wall portions, a plurality of storage spaces encircled by the wall portions, and a plurality of acoustic openings connecting to the storage spaces. The flexible boots are disposed in the storage spaces. The microphones are mounted on the circuit board and disposed in the boots. The abutting mechanism pushes the circuit board toward the front cover to squeeze the flexible boot.

摘要翻译： 电子设备包括前盖，电路板，多个柔性靴，多个麦克风和抵靠机构。 前盖包括多个壁部，由壁部包围的多个存放空间，以及连接到存放空间的多个声学开口。 柔性靴子设置在存储空间中。 麦克风安装在电路板上并设置在靴子中。 抵靠机构将电路板朝向前盖推动以挤压柔性靴。