公开(公告)号：US06388784B1

公开(公告)日：2002-05-14

申请号：US08928225

申请日：1997-09-12

申请人： Makoto Nakamura ,  Yoshihiro Ohtani ,  Hiroshi Uno ,  Tsukasa Kaminokado ,  Hiroyuki Nakaoka ,  Yutaka Ikeda ,  Takashi Nakajima

发明人： Makoto Nakamura ,  Yoshihiro Ohtani ,  Hiroshi Uno ,  Tsukasa Kaminokado ,  Hiroyuki Nakaoka ,  Yutaka Ikeda ,  Takashi Nakajima

IPC分类号： H04B1000

CPC分类号： H04L25/4902

摘要： A digital optical transmitter includes a main/subdata modulation part for distorting a main data modulated signal waveform in response to sub-data, and an E/O conversion part for converting a subsequently obtained electrical modulated signal to an optical modulated signal and outputting the optical modulated signal. A digital optical receiver includes an O/E conversion part for receiving the optical modulated signal, converting it to an electrical modulated signal, and outputting the electrical modulated signal. Additionally, the digital optical receiver further includes a main/subdata demodulation part for demodulating the main data from the electrical modulated signal, while detecting whether or not a distortion signal responsive to the subdata is superposed on a subcarrier which forms the electrical modulated signal. If the distortion signal is superposed on a subcarrier, the main/subdata demodulator part demodulates the associated subdata.

摘要翻译： 一种数字光发射机，包括用于响应子数据使主数据调制信号波形失真的主/子数据调制部分和用于将随后获得的电调制信号转换为光调制信号的E / O转换部分，并输出光 调制信号。 数字光接收机包括用于接收光调制信号的O / E转换部分，将其转换为电调制信号，并输出电调制信号。 此外，数字光接收机还包括主/副数据解调部分，用于从电调制信号中解调主数据，同时检测响应于子数据的失真信号是否叠加在形成电调制信号的子载波上。 如果失真信号叠加在子载波上，则主/分解调制器部分解调相关的子数据。

公开(公告)号：US06567199B1

公开(公告)日：2003-05-20

申请号：US09232007

申请日：1999-01-14

申请人： Hiroyuki Nakaoka ,  Hiroshi Uno ,  Yoshihiro Ohtani

发明人： Hiroyuki Nakaoka ,  Hiroshi Uno ,  Yoshihiro Ohtani

IPC分类号： H04B1004

CPC分类号： H04B10/50 ,  H04L27/04

摘要： A digital optical transmission apparatus includes a modulation portion for modulating data to be transmitted in an ASK modulation method, and an E/O modulation portion for converting an electrical signal output from the modulation portion into an optical signal having a base band component with a constant DC level. DC-biased or FSK-biased may be employed as a method of making constant the DC level of the base band component.

摘要翻译： 数字光传输装置包括调制部分，用于以ASK调制方式调制要发送的数据，以及E / O调制部分，用于将从调制部分输出的电信号转换为具有常数的基带分量的光信号 直流电平。 可以采用DC偏置或FSK偏置作为使基带分量的DC电平恒定的方法。

公开(公告)号：US06456667B2

公开(公告)日：2002-09-24

申请号：US09783525

申请日：2001-02-14

申请人： Yoshihiro Ohtani ,  Hiroshi Uno ,  Yutaka Ikeda

发明人： Yoshihiro Ohtani ,  Hiroshi Uno ,  Yutaka Ikeda

IPC分类号： H04L512

CPC分类号： H04L25/4908

摘要： A method of coding a signal for digital optical communication using a symbol formed of N slots [s1, s2, s3, . . . sN], wherein si is either 0 or 1 where i is an integer and l≦i ≦N is provided. The method includes the steps of determining a plurality of symbols which satisfy the following expression, wherein k is an arbitrary positive integer, and p1, q1, p2, q2, . . . , pk and qk are integers which satisfy 1≦p1

摘要翻译： 使用由N个时隙[s1，s2，s3，...，s3]形成的符号对数字光通信的信号进行编码的方法。 。 。 sN]，其中si是0或1，其中i是整数，并且l <= i <= N。 该方法包括确定满足以下表达式的多个符号的步骤，其中k是任意正整数，并且p1，q1，p2，q2，...。 。 。 ，pk和qk是满足1 <= p1

公开(公告)号：US06215826B1

公开(公告)日：2001-04-10

申请号：US09096989

申请日：1998-06-12

申请人： Yoshihiro Ohtani ,  Hiroshi Uno ,  Yutaka Ikeda

发明人： Yoshihiro Ohtani ,  Hiroshi Uno ,  Yutaka Ikeda

IPC分类号： H04L2700

CPC分类号： H04L25/4908

摘要： A method of coding a signal for digital optical communication using a symbol formed of N slots [s1, s2, s3, . . . , sN], wherein si is either 0 or 1 where i is an integer and 1≦i≦N is provided. The method includes the steps of determining a plurality of symbols which satisfy the following expression, wherein k is an arbitrary positive integer, and p1, q1, p2, q2, . . . , pk and qk are integers which satisfy 1≦p1

摘要翻译： 使用由N个时隙[s1，s2，s3，...，s3]形成的符号对数字光通信的信号进行编码的方法。 。 。 ，sN]，其中si是0或1，其中i是整数，并且1 <= i <= N。 该方法包括确定满足以下表达式的多个符号的步骤，其中k是任意正整数，并且p1，q1，p2，q2，...。 。 。 ，pk和qk是满足1 <= p1

公开(公告)号：US20080291858A1

公开(公告)日：2008-11-27

申请号：US12170281

申请日：2008-07-09

申请人： Srinivas Kandala ,  John Kowalski ,  Yoshihiro Ohtani ,  Shugong Xu

发明人： Srinivas Kandala ,  John Kowalski ,  Yoshihiro Ohtani ,  Shugong Xu

IPC分类号： G08C17/02

CPC分类号： H04W74/06 ,  H04W24/00 ,  H04W52/0216 ,  H04W52/287 ,  H04W52/50 ,  H04W74/002 ,  H04W84/12 ,  Y02D70/142

摘要： A system and method are provided for controlling bandwidth allocation in a wireless local area network (wLAN). The method comprises: expressing device bandwidth allocations in terms of a time base; in response to expressing the bandwidth allocation in terms of a time base, monitoring network communications; and, measuring the allocated bandwidths. The method may further comprise: establishing polling schedules in response to expressing the bandwidth allocation in terms of a time base; and, de-energizing devices in response to the polling schedules. Expressing device bandwidth allocations in terms of a time base includes establishing: an inter-transmission opportunity (TXOP) interval; and, a TXOP jitter. These fields are supplied in the IEEE 802.11e transmit specification (TSPEC). Then, de-energizing devices in response to the polling schedule includes disengaging transmission and receiving functions in the minimum TXOP intervals between polling events, where the minimum TXOP interval is the inter-TXOP interval minus the TXOP jitter.

摘要翻译： 提供了一种用于控制无线局域网（wLAN）中的带宽分配的系统和方法。 该方法包括：以时基表示设备带宽分配; 响应于以时基表示带宽分配，监视网络通信; 并测量分配的带宽。 该方法还可以包括：响应于以时基表示带宽分配来建立轮询时间表; 并且响应于轮询时间表而使装置断电。 表示基于时基的设备带宽分配包括建立：传输间机会（TXOP）间隔; 和TXOP抖动。 这些字段以IEEE 802.11e发送规范（TSPEC）提供。 然后，响应于轮询时间表去激活装置包括在轮询事件之间的最小TXOP间隔中分离发送和接收功能，其中最小TXOP间隔是TXOP间隔减去TXOP抖动。

公开(公告)号：US20060176846A1

公开(公告)日：2006-08-10

申请号：US11325574

申请日：2006-01-05

申请人： Hirosuke Miki ,  Yoshihiro Ohtani

发明人： Hirosuke Miki ,  Yoshihiro Ohtani

IPC分类号： H04Q7/00 ,  H04J3/06 ,  H04J3/16 ,  H04Q7/24 ,  H04J3/22

CPC分类号： H04J3/0664 ,  H03L2207/50 ,  H04J3/0697

摘要： A communications apparatus includes: a timer for updating time information at a cycle longer than a cycle of a clock signal by a factor of n1 (n1>1 is a constant natural number); a frame generation section for generating frames each of which includes the time information; a transmission section; and a control section for instructing the modulation section to transmit the frames to other communications apparatus. The frame generation section sequentially transmits the generated frames to the transmission section. The control section instructs the transmission section to transmit the frames when a time longer than the cycle of the signal by a factor of n2 (n2 is a constant natural number) passes after the time information is updated.

摘要翻译： 通信装置包括：定时器，用于以比时钟信号的周期更长的周期以n1（n1> 1是固定的自然数）来更新时间信息; 帧生成部，用于生成包括时间信息的帧; 传输部分; 以及控制部分，用于指示调制部分将帧发送到其他通信装置。 帧生成部分将所生成的帧顺序发送到发送部分。 当时间信息被更新之后，当比信号的周期长n2（n2是一个固定的自然数）的时间长的时间时，控制部分指示发送部分发送帧。

公开(公告)号：US07957331B2

公开(公告)日：2011-06-07

申请号：US12170281

申请日：2008-07-09

申请人： Srinivas Kandala ,  John Kowalski ,  Yoshihiro Ohtani ,  Shugong Xu

发明人： Srinivas Kandala ,  John Kowalski ,  Yoshihiro Ohtani ,  Shugong Xu

IPC分类号： H04J3/00 ,  H04W4/00

CPC分类号： H04W74/06 ,  H04W24/00 ,  H04W52/0216 ,  H04W52/287 ,  H04W52/50 ,  H04W74/002 ,  H04W84/12 ,  Y02D70/142

摘要： A system and method are provided for controlling bandwidth allocation in a wireless local area network (wLAN). The method comprises: expressing device bandwidth allocations in terms of a time base; in response to expressing the bandwidth allocation in terms of a time base, monitoring network communications; and, measuring the allocated bandwidths. The method may further comprise: establishing polling schedules in response to expressing the bandwidth allocation in terms of a time base; and, de-energizing devices in response to the polling schedules. Expressing device bandwidth allocations in terms of a time base includes establishing: an inter-transmission opportunity (TXOP) interval; and, a TXOP jitter. These fields are supplied in the IEEE 802.11e transmit specification (TSPEC). Then, de-energizing devices in response to the polling schedule includes disengaging transmission and receiving functions in the minimum TXOP intervals between polling events, where the minimum TXOP interval is the inter-TXOP interval minus the TXOP jitter.

摘要翻译： 提供了一种用于控制无线局域网（wLAN）中的带宽分配的系统和方法。 该方法包括：以时基表示设备带宽分配; 响应于以时基表示带宽分配，监视网络通信; 并测量分配的带宽。 该方法还可以包括：响应于以时基表示带宽分配来建立轮询时间表; 并且响应于轮询时间表而使装置断电。 表示基于时基的设备带宽分配包括建立：传输间机会（TXOP）间隔; 和TXOP抖动。 这些字段以IEEE 802.11e发送规范（TSPEC）提供。 然后，响应于轮询时间表去激活装置包括在轮询事件之间的最小TXOP间隔中分离发送和接收功能，其中最小TXOP间隔是TXOP间隔减去TXOP抖动。

公开(公告)号：US07746904B2

公开(公告)日：2010-06-29

申请号：US11594117

申请日：2006-11-08

申请人： Hirosuke Miki ,  Yoshihiro Ohtani

发明人： Hirosuke Miki ,  Yoshihiro Ohtani

IPC分类号： H04J3/06

CPC分类号： H04N21/2368 ,  H04N21/4104 ,  H04N21/4307 ,  H04N21/4341 ,  H04N21/439

摘要： A home theater includes a main unit section and at least one speaker section. The main unit section includes a communication section which receives an AV stream from an AV stream transmission device and via a communication network, a demux section which separates the AV stream into a video stream and an audio stream, a video processing means which processes the video stream so as to generate a video signal, an audio processing section which processes the audio stream so as to generate an audio signal, and an audio acquisition section which acquires an audio stream which includes at least a part of the audio of the AV stream. The communication section transmits the audio stream acquired by the audio acquisition section to the speaker section, via the communication network.

摘要翻译： 家庭影院包括主单元部分和至少一个扬声器部分。 主单元部分包括通信部分，其从AV流传输设备和经由通信网络接收AV流，将AV流分离成视频流和音频流的解复用部分，处理视频的视频处理装置 流以产生视频信号，处理音频流以便产生音频信号的音频处理部分，以及获取包括AV流的音频的至少一部分的音频流的音频获取部分。 通信部通过通信网络将由音频获取部获取的音频流发送到扬声器部。

公开(公告)号：US20060085717A1

公开(公告)日：2006-04-20

申请号：US11295480

申请日：2005-12-07

申请人： Tomonobu Tomaru ,  Yoshihiro Ohtani

发明人： Tomonobu Tomaru ,  Yoshihiro Ohtani

IPC分类号： H04L1/18 ,  G08C25/02

CPC分类号： H03M13/35 ,  H04L1/1819

摘要： A communications method carries out error-correction encoding of data, generation of a suitable packet in accordance with a retransmission request from a receiving side, and transmission of the packet to the receiving side, from a transmission side. In the receiving side, the communications method performs error-correction decoding of the received data, distinguishing an uncorrectable block in accordance with a result of the error-correction decoding, and transmission of a retransmission request packet to the transmitting side. In this way, if a block in the packet is judged as uncorrectable by the receiving side, where one packet is composed of a plurality of correction blocks of error correction codes of a block type, it is possible to retransmit only the block to be retransmitted. Therefore, it is possible to avoid unnecessary use of bands and to attain a low bit rate.

公开(公告)号：US6066982A

公开(公告)日：2000-05-23

申请号：US15944

申请日：1998-01-30

申请人： Yoshihiro Ohtani

发明人： Yoshihiro Ohtani

IPC分类号： H03K23/66 ,  H03K9/04 ,  H03L7/06 ,  H03L7/14 ,  H04L7/033 ,  H04L25/49 ,  H04L27/14

CPC分类号： H04L7/0331 ,  H03K9/04 ,  H04L25/4902 ,  H03L7/06

摘要： A pulse position modulation pulse signal to be demodulated is sampled by a pulse detection part based on a motion clock. The motion clock is generated from a motion clock generating part so that a period of pulse precision n falls within a width of an information pulse in the signal to be demodulated. A phase relationship between the motion clock and the information pulse to be demodulated is classified into six kinds of patterns, and in case the relationship is outside the patterns, it is to be excluded as being under effect of noise. The pulse detection part gives a pulse detection signal in which the effect of the noise has been eliminated to a phase comparison part, which compares the given signal with a reproduction clock timing signal showing the timing of a reproduction clock signal generated in a clock reproduction part, then generates a control signal for controlling a phase of the clock reproduction part. Consequently, it becomes possible to lower a frequency of the motion clock for detecting a position or phase of the information pulse from the pulse position modulation pulse signal in a phase locked loop circuit.

摘要翻译： 要被解调的脉冲位置调制脉冲信号由基于运动时钟的脉冲检测部分采样。 从运动时钟产生部分产生运动时钟，使得脉冲精度n的周期落在要解调的信号中的信息脉冲的宽度内。 运动时钟和要解调的信息脉冲之间的相位关系被分为六种模式，并且在关系在图案之外的情况下，将被排除在噪声的影响之外。 脉冲检测部分给出了相位比较部分消除噪声的影响的脉冲检测信号，该相位比较部分将给定信号与表示在时钟再现部分中产生的再现时钟信号的定时的再现时钟定时信号进行比较 ，然后产生用于控制时钟再现部分的相位的控制信号。 因此，可以降低用于在锁相环电路中从脉冲位置调制脉冲信号检测信息脉冲的位置或相位的运动时钟的频率。