公开(公告)号：US5873058A

公开(公告)日：1999-02-16

申请号：US824520

申请日：1997-03-26

申请人： Hisashi Yajima ,  Noriaki Kawano ,  Yushi Naito ,  Shigeaki Suzuki

发明人： Hisashi Yajima ,  Noriaki Kawano ,  Yushi Naito ,  Shigeaki Suzuki

IPC分类号： G10L19/04 ,  G10L20060101 ,  G10L15/00 ,  G10L19/00 ,  G10L19/12 ,  G10L19/14 ,  H03M3/04 ,  H03M7/30 ,  H04B1/66 ,  H04J3/17 ,  H04L12/28 ,  H04Q3/00 ,  G10L3/00

CPC分类号： G10L19/173

摘要： In a voice coding-and-transmission system using a differential coding, a degradation of voice quality caused by a silent period transmission network and an ATM network is prevented without improving a silent-period elimination transmission network and existing transmission networks such as a STM network. In a relay node 104, an encoder 114 codes a voice signal from a decoder 108 again for a transient period immediately after a voice is started, and a transmission node 100 and a reception node 102 are tandem-connected. The encoder 114 and a decoder 122 at a reception node 102 are given respectively same reference values of a differential processing by memories 118, 128 when the voice is started, thereby preventing an abnormal sound generation due to a mismatch of inner statuses thereof when the voice is started. During the transient period, the internal statuses of an encoder 106 at a reception node 100 and the decoder 122 are closed each other. After the transient period is elapsed, switching a switch in a silent-period eliminator 112 to a digital-one-link, thereby preventing the degradation of the voice quality caused by quantization errors.

摘要翻译： 在使用差分编码的语音编码 - 传输系统中，防止由无声期传输网络和ATM网络引起的语音质量的恶化，而不改进无声期消除传输网络和诸如STM网络的现有传输网络 。 在中继节点104中，编码器114在语音开始之后立即再次对来自解码器108的语音信号进行编码，并且发送节点100和接收节点102串联连接。 接收节点102处的编码器114和解码器122在语音开始时由存储器118,128分别给出与差分处理相同的参考值，从而防止当声音的内部状态不匹配时产生异常声音 开始了 在过渡期间，编码器106在接收节点100和解码器122的内部状态彼此关闭。 在经过了暂时期之后，将无声期消除器112中的开关切换到数字一链路，从而防止由量化误差引起的语音质量的劣化。

公开(公告)号：US4972411A

公开(公告)日：1990-11-20

申请号：US343400

申请日：1989-04-25

申请人： Wataru Fushimi ,  Noriaki Kawano ,  Yushi Naito

发明人： Wataru Fushimi ,  Noriaki Kawano ,  Yushi Naito

IPC分类号： H04J3/12

CPC分类号： H04J3/12

摘要： A signalling transmission system is disclosed which consists of a transmitting module including a signalling variation detecting unit and a signalling synthesization unit, and a receiving module including a signalling flag detecting unit and a signalling separation unit. The signalling synthesization unit makes composition signals by inserting signalling signals into voice signals together with a flag when signalling variations are detected by the variation detecting unit. A flag detecting unit detects a flag contained in the composition signals received by the receiving module and instructs the separating unit to separate the signalling signals from the voice signals contained the composition signals when the flag shows that the composition signals include the signalling signals. The signalling signals and the voice signals are therefore output from the receiving module.

摘要翻译： 公开了一种由包括信令变化检测单元和信令合成单元的发送模块组成的信令传输系统，以及包括信令标志检测单元和信令分离单元的接收模块。 当由变化检测单元检测到信令变化时，信令合成单元通过将信令信号与标志一起插入语音信号来产生合成信号。 标志检测单元检测由接收模块接收到的合成信号中包含的标志，并且当标志表示合成信号包括信令信号时，指示分离单元从包含合成信号的语音信号中分离信令信号。 因此，信令信号和语音信号从接收模块输出。