公开(公告)号：US5511095A

公开(公告)日：1996-04-23

申请号：US45426

申请日：1993-04-13

申请人： Takeo Inoue ,  Hideharu Nishida ,  Shozo Sugishita ,  Akira Tsukihashi

发明人： Takeo Inoue ,  Hideharu Nishida ,  Shozo Sugishita ,  Akira Tsukihashi

IPC分类号： H04B14/06

CPC分类号： H04B14/068

摘要： The present invention relates to an audio signal coding and decoding device for coding and decoding an audio signal using an adaptive differential coding system. The audio signal coding and decoding device according to the present invention comprises an adaptive differential pulse code modulation coding device for coding an audio signal, an adaptive differential pulse code modulation decoding device for decoding the audio signal coded, an integrator provided in the preceding stage of the coding device and for decreasing the variation between unit samples of the input audio signal of the coding device, and a differentiator provided in the succeeding stage of the decoding device and for processing the audio signal decoded by the decoding device so that the variation decreased by the integrator is restored to the original one. Since the integrator is provided in the preceding stage of the coding device, the variation between the unit samples of the input audio signal of the coding device is decreased. Therefore, a prediction error signal obtained by the coding device is decreased. As a result, quantizer step-size is decreased, resulting in a reduced quantization error.

摘要翻译： 本发明涉及一种使用自适应差分编码系统对音频信号进行编码和解码的音频信号编码和解码装置。 根据本发明的音频信号编码和解码装置包括用于对音频信号进行编码的自适应差分脉冲编码调制编码装置，用于对编码的音频信号进行解码的自适应差分脉冲编码调制解码装置，在前一级提供的积分器 编码装置，用于减少编码装置的输入音频信号的单元样本与解码装置的后级中提供的微分器之间的变化，并且用于处理由解码装置解码的音频信号，使得变化减小 集成商恢复原来的。 由于在编码装置的前级提供积分器，所以编码装置的输入音频信号的单位样本之间的变化减小。 因此，由编码装置获得的预测误差信号减小。 结果，量化器步长减小，导致量化误差降低。

公开(公告)号：US5845248A

公开(公告)日：1998-12-01

申请号：US941232

申请日：1997-09-30

申请人： Hideharu Nishida ,  Hiroki Ohnishi ,  Takeshi Yumura ,  Masanori Miyatake ,  Naoyuki Yoden ,  Kayo Yoshimura

发明人： Hideharu Nishida ,  Hiroki Ohnishi ,  Takeshi Yumura ,  Masanori Miyatake ,  Naoyuki Yoden ,  Kayo Yoshimura

IPC分类号： G10L13/04 ,  G10L13/00 ,  G10L13/02 ,  G10L13/08 ,  H04B1/16 ,  H04H20/00 ,  H04H60/16 ,  G10L5/02

CPC分类号： G10L13/00

摘要： An apparatus for reading out textual information with synthesized speech comprises: a buffer memory 24 for buffering character codes of textual information; a keyword/ read-out region storing unit 22 which stores previously specified keyword and region of the textual information, the region being to be read out and including the keyword; a read-out region retrieving unit 23 which retrieves the keyword from the buffered character codes, and which, when the keyword exists, causes character codes corresponding to the read-out region, to be outputted from the buffer memory 24; a speech synthesizing unit 26 which converts the outputted character codes into a synthesized speech signal; and a loudspeaker 14 for outputting the synthesized speech signal in the form of synthesized speech. In textual information of various kinds such as textual information received by a teletext multiplex FM radio, or that of an electronic newspaper, only a portion which relates to a keyword that is previously specified by the user is sounded with synthesized speech, thereby enabling the user to obtain only required information.

摘要翻译： 一种用合成语音读出文本信息的装置包括：缓冲存储器24，用于缓冲文本信息的字符码; 关键字/读出区域存储单元22，其存储先前指定的关键字和文本信息的区域，该区域将被读出并包括该关键字; 读出区域检索单元23，其从缓冲字符代码检索关键字，并且当存在关键字时，使得与读出区域相对应的字符代码从缓冲存储器24输出; 语音合成单元26，其将输出的字符代码转换为合成语音信号; 以及用于以合成语音的形式输出合成语音信号的扬声器14。 在由文字多重FM收音机接收的文字信息或电子报纸等文字信息的文字信息中，与用户先前指定的关键词相关的部分仅以合成语音进行发音，从而使用户 仅获取所需信息。