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    • 1. 发明授权
    • Erasure of DTMF signal transmitted as speech data
    • 擦除作为语音数据发送的DTMF信号
    • US07856096B2
    • 2010-12-21
    • US11352321
    • 2006-02-13
    • Tatsuya NakazawaKazunori Ozawa
    • Tatsuya NakazawaKazunori Ozawa
    • H04M1/00
    • H04Q1/4575
    • A DTMF signal processing apparatus of the present invention comprises a data divider unit, a DTMF signal component analyzer unit, a weighting processing unit, a buffer, a DTMF signal erasure determination unit, and a DTMF signal erasure processing unit. The data divider unit divides speech data into a plurality of divided speech data, and the DTMF signal component analyzer unit analyzes whether or not the divided speech data has a DTMF signal component. The weighting processing unit applies a weighting value to divided speech data analyzed at this time and stores the resultant speech data in the buffer, and also applies a weighting value to past divided speech data previously stored in the buffer when the result of the analysis indicates that the analyzed divided speech data has the DTMF signal component. The DTMF signal erasure determination unit determines based on the weighting value whether or not to erase the divided speech data stored in the buffer. The DTMF signal erasure processing unit replaces the divided speech data with either mute data or noise data, and delivers the replaced data when the result of the determination indicates an erasure.
    • 本发明的DTMF信号处理装置包括数据分频器单元,DTMF信号分量单元,加权处理单元,缓冲器,DTMF信号擦除确定单元和DTMF信号擦除处理单元。 数据分频器单元将语音数据分割成多个划分的语音数据,DTMF信号分量单元分析分割的语音数据是否具有DTMF信号分量。 加权处理单元对此时分析的划分的语音数据应用加权值,并将所得到的语音数据存储在缓冲器中,并且当分析结果表明, 所分析的分割语音数据具有DTMF信号分量。 DTMF信号擦除确定单元基于加权值确定是否擦除存储在缓冲器中的划分的语音数据。 DTMF信号擦除处理单元用静音数据或噪声数据替换划分的语音数据,并且当确定结果指示擦除时传送替换的数据。
    • 3. 发明申请
    • Protocol Conversion System in Media Communication between a Packet-Switching Network and Circuit-Switiching Network
    • 分组交换网络和电路交换网络之间的媒体通信中的协议转换系统
    • US20100128715A1
    • 2010-05-27
    • US12089266
    • 2006-09-26
    • Hiroaki DeiKazunori OzawaKazuhiro KoyamaTatsuya Nakazawa
    • Hiroaki DeiKazunori OzawaKazuhiro KoyamaTatsuya Nakazawa
    • H04L12/66H04J3/22
    • H04M7/1205H04L65/1006H04L65/1009H04L65/104
    • In media communication by way of a packet-switching network and a circuit-switching network, a protocol conversion device for converting protocols between the packet-switching network and the circuit-switching network includes a call connection unit and a protocol converter. The call connection unit carries out call connection processes of media communication between terminals of the packet-switching network side and terminals of the circuit-switching network side. The protocol converter analyzes packets of speech received from the packet-switching network to specify the encoding bit rate of speech data in the speech packets. The protocol converter then specifies the multiplex table used in multiplexing frames on the circuit-switching network from the encoding bit rate. The protocol converter further generates frames by using the multiplex table that was specified to multiplex data in the payload of packets received from the packet-switching network and transmits to the circuit-switching network.
    • 在通过分组交换网络和电路交换网络的媒体通信中,用于在分组交换网络和电路交换网络之间转换协议的协议转换装置包括呼叫连接单元和协议转换器。 呼叫连接单元进行分组交换网侧的终端与电路交换网侧的终端之间的媒体通信的呼叫连接处理。 协议转换器分析从分组交换网络接收到的语音分组,以指定语音分组中的语音数据的编码比特率。 协议转换器然后从编码比特率指定在电路交换网络上复用帧中使用的多路复用表。 协议转换器还通过使用被指定为复用从分组交换网络接收到的分组的有效载荷中的数据的多路复用表来生成帧,并发送到电路交换网络。
    • 4. 发明申请
    • Media stream relay device and method
    • 媒体流中继设备及方法
    • US20070242663A1
    • 2007-10-18
    • US11783657
    • 2007-04-11
    • Tatsuya NakazawaKazunori Ozawa
    • Tatsuya NakazawaKazunori Ozawa
    • H04L12/66
    • H04L29/06027H04L65/607H04L65/80
    • When media communication is relayed through a circuit switching network and a packet switching network, packet congestion and packet loss is inhibited by limiting the bandwidth and the number of packets on the packet switching network. Audio packets received from the packet switching network are stored in a buffer for absorbing fluctuation on the packet switching network, and it is determined whether an encoded audio stream is acquirable from the buffer. If no acquisition, an encoded audio stream representing either silence or noise information is generated and multiplexed, and the multiplexed data is output to the circuit switching network. Multiplexed data constituted by a plurality of multiplexed encoded streams received from the circuit switching network is separated into respective encoded streams, and only encoded audio streams representing sound or noise information are packetized based on the frame information for the encoded audio streams and sent to the packet switching network.
    • 当通过电路交换网络和分组交换网络中继媒体通信时,通过限制分组交换网络上的带宽和分组数量来阻止分组拥塞和分组丢失。 从分组交换网络接收的音频分组存储在用于吸收分组交换网络上的波动的缓冲器中,并且确定编码的音频流是否可从缓冲器获取。 如果没有获取,则生成并复用表示静音或噪声信息的编码音频流,并将多路复用数据输出到电路交换网络。 由从电路交换网络接收的多个多路复用编码流构成的复用数据被分离成各自的编码流,并且仅基于编码音频流的帧信息将代表声音或噪声信息的编码音频流分组化并发送到分组 交换网络。
    • 5. 发明授权
    • Method for connection between communication networks of different types and gateway apparatus
    • 不同类型通信网络和网关设备之间的连接方法
    • US07796584B2
    • 2010-09-14
    • US10573754
    • 2004-09-08
    • Tatsuya NakazawaAtsushi MurashimaKazunori Ozawa
    • Tatsuya NakazawaAtsushi MurashimaKazunori Ozawa
    • H04L12/66H04L12/28G01R31/08
    • H04L12/66H04L12/6418H04L65/102
    • A gateway apparatus for conducting connection between different types of communication networks, that are a line-switched network and a packet-switched network, there are provided a method and an apparatus in which sound breaks otherwise caused by delay or loss of speech encoded data is eliminated and deterioration of the speech quality is minimized to assure short delay in speech communication. A speech data processing circuit of the gateway apparatus compares the number of speech encoded data actually acquired with an expected value. The speech data processing circuit packetizes the so generated speech encoded data, along with the speech encoded data, to send the packetized data from a transmission circuit to the packet-switched network. The resulting data is sent from a data multiplexing circuit and a line-switched network terminating circuit to the line-switched network.
    • 提供了一种用于进行线路交换网络和分组交换网络的不同类型的通信网络之间的连接的网关装置,其中由语音编码数据的延迟或丢失导致的声音断开的方法和装置是 语音质量的消除和恶化被最小化以确保语音通信的短暂延迟。 网关装置的语音数据处理电路将实际获取的语音编码数据与预期值进行比较。 语音数据处理电路将所生成的语音编码数据与语音编码数据分组化,以将分组数据从发送电路发送到分组交换网络。 所得数据从数据复用电路和线路交换网络终端电路发送到线路交换网络。
    • 7. 发明申请
    • Erasure of DTMF signal transmitted as speech data
    • 擦除作为语音数据发送的DTMF信号
    • US20060182233A1
    • 2006-08-17
    • US11352321
    • 2006-02-13
    • Tatsuya NakazawaKazunori Ozawa
    • Tatsuya NakazawaKazunori Ozawa
    • H04M1/64
    • H04Q1/4575
    • A DTMF signal processing apparatus of the present invention comprises a data divider unit, a DTMF signal component analyzer unit, a weighting processing unit, a buffer, a DTMF signal erasure determination unit, and a DTMF signal erasure processing unit. The data divider unit divides speech data into a plurality of divided speech data, and the DTMF signal component analyzer unit analyzes whether or not the divided speech data has a DTMF signal component. The weighting processing unit applies a weighting value to divided speech data analyzed at this time and stores the resultant speech data in the buffer, and also applies a weighting value to past divided speech data previously stored in the buffer when the result of the analysis indicates that the analyzed divided speech data has the DTMF signal component. The DTMF signal erasure determination unit determines based on the weighting value whether or not to erase the divided speech data stored in the buffer. The DTMF signal erasure processing unit replaces the divided speech data with either mute data or noise data, and delivers the replaced data when the result of the determination indicates an erasure.
    • 本发明的DTMF信号处理装置包括数据分频器单元,DTMF信号分量单元,加权处理单元,缓冲器,DTMF信号擦除确定单元和DTMF信号擦除处理单元。 数据分频器单元将语音数据分割成多个划分的语音数据,DTMF信号分量单元分析分割的语音数据是否具有DTMF信号分量。 加权处理单元对此时分析的划分的语音数据应用加权值,并将所得到的语音数据存储在缓冲器中,并且当分析结果表明, 所分析的分割语音数据具有DTMF信号分量。 DTMF信号擦除确定单元基于加权值确定是否擦除存储在缓冲器中的划分的语音数据。 DTMF信号擦除处理单元用静音数据或噪声数据替换划分的语音数据,并且当确定结果指示擦除时传送替换的数据。
    • 9. 发明申请
    • Method for connection between communication networks of different types and gateway apparatus
    • 不同类型通信网络和网关设备之间的连接方法
    • US20070136494A1
    • 2007-06-14
    • US10573754
    • 2004-09-08
    • Tatsuya NakazawaAtsushi MurashimaKazunori Ozawa
    • Tatsuya NakazawaAtsushi MurashimaKazunori Ozawa
    • G06F15/16H04J1/16
    • H04L12/66H04L12/6418H04L65/102
    • In a gateway apparatus for conducting connection between different types of communication networks, that are a line-switched network and a packet-switched network, there are provided a method and an apparatus in which sound breaks otherwise caused by delay or loss of speech encoded data is eliminated and deterioration of the speech quality is minimized to assure short delay in speech communication. A speech data processing circuit 550 of the gateway apparatus compares the number of speech encoded data actually acquired with an expected value, that is, the number of speech encoded data, which is the number of the encoded data expected to be output every unit period from a multiplexed data demultiplexing circuit 200. If the number of speech encoded data actually acquired is less than the expected value, the speech data processing circuit generates speech encoded data for a destination terminal of transmission to execute error concealment processing. The speech data processing circuit packetizes the so generated speech encoded data, along with the speech encoded data, to send the so packetized data from a transmission circuit 801 to the packet-switched network. If the speech data has failed to be acquired from a receiving circuit of the packet-switched network, at a preset period, a signal to the effect that packet data has failed to be acquired is generated and selection is made as to whether encoded data should be generated or encoded data should be discarded. The resulting data is sent from a data multiplexing circuit 900 and a line-switched network terminating circuit 100 to the line-switched network.
    • 在作为线路交换网络和分组交换网络的不同类型的通信网络之间进行连接的网关装置中,提供了一种方法和装置,其中声音由于语音编码数据的延迟或丢失而引起 消除语音质量的恶化,以确保语音通信的短暂延迟。 网关装置的语音数据处理电路550将实际获取的语音编码数据与期望值(即,语音编码数据的数目)进行比较,每个单位周期期望输出的编码数据的数量 复用数据解复用电路200。 如果实际获取的语音编码数据的数量小于期望值,则语音数据处理电路产生用于发送的目的地终端的语音编码数据,以执行错误隐藏处理。 语音数据处理电路将如此生成的语音编码数据与语音编码数据分组化,以将发送电路801的分组数据发送到分组交换网络。 如果语音数据未能从分组交换网络的接收电路获取,则在预设的时间段,产生了分组数据未能被获取的信号,并且选择编码的数据是否应当 生成或编码的数据应该被丢弃。 所得到的数据从数据多路复用电路900和线路交换网络终端电路100发送到线路交换网络。