公开(公告)号：US20050025086A1

公开(公告)日：2005-02-03

申请号：US10772308

申请日：2004-02-06

Applicant: Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

Inventor： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

IPC: H04J11/00 ,  H04L1/00 ,  H04L5/14 ,  H04L12/20 ,  H04L27/26 ,  H04L29/08 ,  H04B7/185

CPC classification number: H04L1/0065 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/1438 ,  H04L27/2626 ,  H04L27/2647

Abstract: A processor of a transceiver estimates a communication distance to an opposing ADSL modem apparatus by detecting a reception level of a REVERB signal in accordance with the ITU-T regulated G.992.1 or G. 992.2. Based on the estimated communication distance, and by referring to a table showing attenuation of signal energy (stored in a RAM), the signal energy in a high frequency band (among the signal energy assigned to transmitting signals) is concentrated into a low frequency band during the communication.

Abstract translation: 收发机的处理器通过根据ITU-T规定的G.992.1或G.992.2检测REVERB信号的接收电平来估计到相对ADSL调制解调设备的通信距离。 基于估计的通信距离，通过参照表示存储在RAM中的信号能量衰减的表（高频带中的信号能量（分配给发送信号的信号能量）中的信号能量集中在低频带 在沟通过程中

公开(公告)号：US5946348A

公开(公告)日：1999-08-31

申请号：US664953

申请日：1996-06-13

Applicant: Mikio Mizutani ,  Nobuhiko Noma ,  Eizo Katayama ,  Genzo Takagi ,  Yoshihiko Noguchi ,  Mitsuhiro Araki

Inventor： Mikio Mizutani ,  Nobuhiko Noma ,  Eizo Katayama ,  Genzo Takagi ,  Yoshihiko Noguchi ,  Mitsuhiro Araki

IPC: H04N1/32 ,  H04B1/38 ,  H04L13/08 ,  H04L29/10 ,  H04M11/00 ,  H04M11/06

CPC classification number: H04M11/06

Abstract: A MODEM can shorten the processing time of an interface disposed between a data terminal equipment (DTE) and the MODEM. The MODEM stores an object program of a procedure in a memory and switches an operational mode of the MODEM automatically corresponding to the prescribed procedure thereby executing the procedure corresponding to the current operational mode. The MODEM further comprises a timer which monitors the transits time between a completed procedure and the next procedure, and the MODEM starts the process of a specified operational mode based on a mode-setting-instruction of the procedure as well as monitoring the transitions time by using the timer, and executing a next specified operational mode when the timer times out, thereby allowing the MODEM to perform the various operational mode switches.

公开(公告)号：US5283776A

公开(公告)日：1994-02-01

申请号：US706705

申请日：1991-05-29

Applicant: Genzo Takagi

Inventor： Genzo Takagi

IPC: G11B21/08 ,  G11B7/085 ,  G11B7/00

CPC classification number: G11B7/08541

Abstract: A method of counting the number of tracks on an optical disk each track comprising a plurality of sectors each having an address segment and a plurality of data segments, each of the segments having at its head portion a region for recording an access code representing a track number to which the segment belongs. The method comprises the steps of sampling the access code number through an optical head, obtaining a code number difference (V0) between the present sampled access code number (GC) and the previous sampled access code number (GC1), and adding the code number difference to a track count value (TCNT) to obtain the number of the tracks that the optical head moves to traverse. This method can accurately and surely count the number of the tracks of an optical disk.

Abstract translation: 一种对光盘上的轨道数进行计数的方法，每个轨道包括多个具有地址段和多个数据段的扇区，每个段在其头部具有用于记录表示轨道的访问代码的区域 该段所属的号码。 该方法包括以下步骤：通过光头对接入码号进行采样，获得当前采样的接入码号（GC）与先前的采样的接入码号（GC1）之间的码数差（V0），并将码号 与轨迹计数值（TCNT）的差异，以获得光学头移动穿过的轨道的数量。 该方法可以准确且可靠地计数光盘的轨道数。

公开(公告)号：US07006261B1

公开(公告)日：2006-02-28

申请号：US09458882

申请日：1999-12-10

Applicant: Mikio Mizutani ,  Nobuhiko Noma ,  Eizo Katayama ,  Genzo Takagi ,  Yoshihiro Noguchi ,  Mitsuhiro Araki

Inventor： Mikio Mizutani ,  Nobuhiko Noma ,  Eizo Katayama ,  Genzo Takagi ,  Yoshihiro Noguchi ,  Mitsuhiro Araki

IPC: H04N1/32

CPC classification number: H04N1/32 ,  H04M11/066 ,  H04N1/333

Abstract: A MODEM can shorten the processing time of an interface disposed between a data terminal equipment (DTE) and the MODEM. The MODEM stores an object program of a procedure in a memory and switches an operational mode of the MODEM automatically corresponding to the prescribed procedure thereby executing the procedure corresponding to the current operational mode. The MODEM further comprises a timer which monitors the transits time between a completed procedure and the next procedure, and the MODEM starts the process of a specified operational mode based on a mode-setting-instruction of the procedure as well as monitoring the transitions time by using the timer, and executing a next specified operational mode when the timer times out, thereby allowing the MODEM to perform the various operational mode switches.

公开(公告)号：US20050254515A1

公开(公告)日：2005-11-17

申请号：US11115291

申请日：2005-04-27

Applicant: Takashi Suzuki ,  Genzo Takagi ,  Yoshinori Takahashi ,  Toshiko Nishida ,  Akihiro Sobue ,  Nobuhiko Noma

Inventor： Takashi Suzuki ,  Genzo Takagi ,  Yoshinori Takahashi ,  Toshiko Nishida ,  Akihiro Sobue ,  Nobuhiko Noma

IPC: H04L29/08 ,  H04L12/12 ,  H04M11/06 ,  H04L12/56

CPC classification number: H04M11/062 ,  H04L12/12 ,  Y02D50/20 ,  Y02D50/40 ,  Y02D50/44

Abstract: After establishing a connection between an ATU-C and an ATU-R and having a state where data communication is enabled, the ATU-R checks a packet that flows through a network at the user side. When there is no packet addressed to the ATU-R for a predetermined time period, the ATU-R transmits, to the ATU-C, a request to transition to an energy-save mode. The ATU-C and AUT-R determines a parameter to be used for the energy save mode, the parameter enabling a number of carriers and/or transmission power to be decreased compared to the ones in a normal mode. Using the determined parameter, a state in which data communication is enabled is maintained.

Abstract translation: 在ATU-C和ATU-R之间建立连接并具有启用数据通信的状态之后，ATU-R检查在用户侧通过网络流过的分组。 当ATU-R没有寻址到预定时间段的分组时，ATU-R向ATU-C发送转换到节能模式的请求。 ATU-C和AUT-R确定要用于节能模式的参数，与普通模式相比，允许多个载波和/或发射功率的参数减小。 使用确定的参数，保持启用数据通信的状态。

公开(公告)号：US20050036540A1

公开(公告)日：2005-02-17

申请号：US10781694

申请日：2004-02-20

Applicant: Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

Inventor： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

IPC: H04J11/00 ,  H04B1/38 ,  H04L5/02 ,  H04L5/14 ,  H04L7/02 ,  H04L29/08 ,  H04M11/06

CPC classification number: H04L5/023 ,  H04L5/1469 ,  H04M11/06

Abstract: The present invention provides a communication control method between DSL modem apparatuses mutually connected via a metallic cable. One of the DSL modem apparatuses transmits transmission data using a plurality of sub-carriers simultaneously, while the other DSL modem apparatus decodes the transmission data in the plurality of sub-carriers. The both sides of DSL modem apparatuses exchange data signals by mutually synchronizing and alternatively sharing transmission timeslots and reception timeslots, using the same range of sub-carriers. In addition, the upstream (data transmission from a remote side to a center side) uses the same range of carrier indexes that are used in the downstream (data transmission from the center side to the remote side).

Abstract translation: 本发明提供了经由金属电缆相互连接的DSL调制解调装置之间的通信控制方法。 DSL调制解调装置之一同时使用多个副载波发送发送数据，而另一个DSL调制解调装置解码多个子载波中的发送数据。 DSL调制解调设备的两侧通过使用相同范围的子载波互相同步并交替地共享传输时隙和接收时隙来交换数据信号。 此外，上游（从远程侧到中心侧的数据传输）使用与下游使用的相同的载波索引范围（从中心侧到远端的数据传输）。

公开(公告)号：US5661709A

公开(公告)日：1997-08-26

申请号：US689130

申请日：1996-07-30

Applicant: Genzo Takagi ,  Yoshihiro Noguchi ,  Eizo Katayama ,  Mitsuhiro Araki ,  Yoshinori Takahashi

Inventor： Genzo Takagi ,  Yoshihiro Noguchi ,  Eizo Katayama ,  Mitsuhiro Araki ,  Yoshinori Takahashi

IPC: G11B20/10 ,  G11B7/005 ,  G11B20/18 ,  G11B7/00

CPC classification number: G11B20/10009 ,  G11B7/005

Abstract: A digital signal detection circuit includes a threshold value calculator calculating a threshold value from assumptive sampled values corresponding to various data patterns of a regenerated signal. The regenerated signal is obtained by regenerating data recorded on a recording medium by a regenerating head. The detection circuit also includes a Viterbi decoder carrying out Viterbi decoding of the regenerated signal with the threshold value determined by the threshold value calculator as a constant. The threshold value calculator variably controls the threshold value using a decoded output of the Viterbi decoder and a regenerated signal corresponding to the decoded output of the Viterbi decoder.

Abstract translation: 数字信号检测电路包括阈值计算器，从对应于再生信号的各种数据模式的假设采样值计算阈值。 再生信号通过再生由再生头重新记录在记录介质上的数据而获得。 该检测电路还包括一个维特比解码器，其将由该阈值计算器确定的阈值的再生信号进行维特比译码，作为常数。 阈值计算器使用维特比解码器的解码输出和对应于维特比解码器的解码输出的再生信号来可变地控制阈值。