专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5611018A System for controlling voice speed of an input signal 失效
标题翻译：控制输入信号语音速度的系统
公开(公告)号：US5611018A
公开(公告)日：1997-03-11
申请号：US305607
申请日：1994-09-14
申请人： Hiroshi Tanaka , Masayuki Iida , Masanori Miyatake , Shozo Sugishita , Teruo Hoshi
发明人： Hiroshi Tanaka , Masayuki Iida , Masanori Miyatake , Shozo Sugishita , Teruo Hoshi
IPC分类号： G10L21/04 , G10L3/02
CPC分类号： G10L21/04
摘要： In a voice speed converting system according to the present invention, an input sound signal is subjected to voice speed conversion processing by a voice speed conversion processing device. Output from the voice speed conversion processing device is written to a ring memory. Data written to the ring memory are read out at a predetermined speed. The amount of stored data in the ring memory is calculated on the basis of a write signal and a read signal for the ring memory by stored data amount calculating device. The voice speed converting device includes a section judging device that judges which of a voice section and a silence section corresponds to the input sound signal. The input sound signal is subjected to compression and expansion processing or deletion processing, in response to an output of the section judging device and an output of the stored data amount calculating device by a signal processing device.
摘要翻译：在根据本发明的语音速度转换系统中，输入声音信号由语音速度转换处理装置进行话音速度转换处理。语音速度转换处理装置的输出被写入环形存储器。以预定速度读出写入环形存储器的数据。基于存储数据量计算装置的写入信号和环形存储器的读取信号来计算存储在环形存储器中的数据量。语音速度转换装置包括：段判断装置，其判断语音部分和静音部分中的哪一个对应于输入的声音信号。响应于区段判断装置的输出和信号处理装置的存储数据量计算装置的输出，对输入声音信号进行压缩和扩展处理或删除处理。

2. 发明授权

US5781885A Compression/expansion method of time-scale of sound signal 失效
标题翻译：声音信号时间尺度的压缩/扩展方法
公开(公告)号：US5781885A
公开(公告)日：1998-07-14
申请号：US888527
申请日：1997-07-07
申请人： Takeo Inoue , Shozo Sugishita
发明人： Takeo Inoue , Shozo Sugishita
IPC分类号： G10L21/04 , G10L5/02
CPC分类号： G10L21/04
摘要： At a time of compression, two sound waveform segments each having single pitch length are cut-out from an input sound waveform at a time point represented by a current pointer and at a time point advanced from the time point by a single pitch period, respectively, and then, by adding the two sound waveform segments to each other after being multiplied by window functions, a single sound waveformn segment being compressed is produced. Next, the pointer is moved on the input sound waveform according to a compression rate, and then, a similar operation is repeated to produce a sound signal being compressed. At a time of expansion, two sound waveform segments each having double pitch length are cut-out from the sound waveform thus compressed at a time point represented by the current pointer and at a time point delayed from the time point by the single pitch period, respectively, and then, by adding the two sound wave segments to each other after being multiplied by window functions, a single synthesized sound wave form segment is obtained. Next, the pointer is moved on the sound waveform being compressed according to an expansion rate, and then, by repeating a similar operation, a sound signal being expanded is obtained.
摘要翻译：在压缩时，分别具有单个节距长度的两个声音波形段从由当前指针表示的时间点的输入声音波形和从时间点延迟单个音调周期的时间点分别切出，然后通过在乘以窗函数之后将两个声音波形段相加，产生被压缩的单个声音波形段。接下来，根据压缩率将指针移动到输入声音波形上，然后重复类似的操作以产生被压缩的声音信号。在扩展时，从由当前指针表示的时间点和从时间点延迟单个音调周期的时间点，从这样压缩的声音波形中切出两个具有双音调长度的声音波形段，然后，通过在乘以窗函数之后将两个声波段相加，获得单个合成声波段。接下来，将指针按照扩展速率在被压缩的声音波形上移动，然后通过重复类似的操作，获得正在扩展的声音信号。

3. 发明授权

US5511095A Audio signal coding and decoding device 失效
标题翻译：音频信号编解码装置
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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式