公开(公告)号：JP2007129517A

公开(公告)日：2007-05-24

申请号：JP2005320514

申请日：2005-11-04

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： MATSUMOTO YASUSHI ,  YOSHIKAWA SUSUMU

IPC: H04L7/04

Abstract: PROBLEM TO BE SOLVED: To provide a digital data transmission system and a digital data transmission method capable of increasing a transmission rate and keeping the image quality and the sound quality high in the case of transmitting digital data via a network. SOLUTION: The digital data transmission system is characterized in such that an external clock reception section of a transmission side terminal and an external clock reception section of a reception side terminal receive clock signals from external clock sources whose frequency precision is the same as each other, and a data transmission section of the transmission side terminal and a data reception section of the reception side terminal are controlled for transmission reception of data packets on the basis of the clock signals. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供一种数字数据传输系统和数字数据传输方法，其能够在通过网络发送数字数据的情况下提高传输速率并保持图像质量和声音质量。 解决方案：数字数据传输系统的特征在于，发送侧终端的外部时钟接收部分和接收侧终端的外部时钟接收部分接收来自外部时钟源的时钟信号，其频率精度相同 控制发送侧终端的数据发送部和接收侧终端的数据接收部，根据时钟信号进行数据包的发送接收。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2010041280A

公开(公告)日：2010-02-18

申请号：JP2008200531

申请日：2008-08-04

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： MATSUMOTO YASUSHI ,  MAEDA KAZUAKI

IPC: H04R3/02 ,  H04R3/04

Abstract: PROBLEM TO BE SOLVED: To provide a signal processing device which suppresses an occurrence of an abnormal noise by return noise.
SOLUTION: A signal processing apparatus includes a band division circuit Fd generating a plurality of subband signals by performing a first orthogonal transform to a digital voice input signal, a plurality of AGC amplifying circuits G1-Gn provided corresponding to each of signal groups S1-Sn composed of at least three subband signals whose frequency bands are adjoining with each other, obtaining a signal group level based on a level of the subband signal except the subband signals whose frequency bands are adjoining to other signal groups in each corresponding signal group, determining a gain based on the signal group level, and performing amplifying processing to all of the subband signals within the corresponding signal group based on the gain, and a band synthetic circuit Fc performing an inverse transform of the first orthogonal transform to a signal to which the amplifying processing is performed by each of the AGC amplifying circuits G1-Gn and outputting the digital voice output signal.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种通过返回噪声抑制异常噪声的发生的信号处理装置。 解决方案：信号处理装置包括通过对数字语音输入信号执行第一正交变换而生成多个子带信号的分频电路Fd，与每个信号组对应设置的多个AGC放大电路G1-Gn S1-Sn由频带彼此相邻的至少三个子带信号组成，除了频带与每个相应信号组中的其它信号组相邻的子带信号之外，基于子带信号的电平获得信号组电平 基于信号组电平确定增益，并且基于增益对相应信号组内的所有子带信号执行放大处理;以及频带合成电路Fc，执行第一正交变换的逆变换到信号 由AGC放大电路G1-Gn中的每一个执行放大处理并输出数字语音输出 ut信号。 版权所有（C）2010，JPO＆INPIT