公开(公告)号：US06430172B1

公开(公告)日：2002-08-06

申请号：US09139887

申请日：1998-08-25

申请人： Takashi Usui ,  Hisaki Hiraiwa ,  Takehiro Sugita

发明人： Takashi Usui ,  Hisaki Hiraiwa ,  Takehiro Sugita

IPC分类号： H04J306

CPC分类号： H04B7/2643 ,  H04L12/6418 ,  H04L2012/6421 ,  H04L2012/6459

摘要： A radio communication system where data is transferred by TDMA in one frame. A frame is formed of a control-data transfer time region and an information-data transfer time region. In the control-data transfer time region, polling is performed for each terminal and a transfer rate and whether transfer data exists are returned to a control station as an ACK. The control station assigns a channel to each terminal according to this information a time period for data transfer in the information-data transfer time region is assigned to each terminal which has made a transmission request. In the region, asynchronous data and isochronous data can be transferred together. Since data is transferred in the time period assigned in advance in a frame, a constant transfer rate is obtained without being affected by an increase or decrease of traffic.

摘要翻译： 一种无线电通信系统，其中通过TDMA在一帧中传送数据。 帧由控制数据传送时间区域和信息数据传送时间区域形成。 在控制数据传送时间区域中，对每个终端执行轮询，并且传送速率以及是否存在传送数据作为ACK返回给控制站。 根据该信息，控制站向每个终端分配信道，在信息数据传送时间区域中的数据传送的时间段被分配给发送请求的每个终端。 在该区域中，异步数据和同步数据可以一起传输。 由于在帧中预先分配的时间段内传送数据，所以在不受流量增减的影响的情况下，获得恒定的传送速率。

公开(公告)号：US06411664B1

公开(公告)日：2002-06-25

申请号：US09139434

申请日：1998-08-25

申请人： Takashi Usui ,  Hisaki Hiraiwa ,  Takehiro Sugita

发明人： Takashi Usui ,  Hisaki Hiraiwa ,  Takehiro Sugita

IPC分类号： H03D100

CPC分类号： H04L27/2655 ,  H04L5/22 ,  H04L27/2679

摘要： A correlation detecting apparatus is capable of securely detecting a M sequence code forming a reference for timing even when a plurality of signals with different amplitudes are time division multiplexed includes matched filter (82) for detecting a predetermined code from a received signal, an average amplitude detector circuit (83) for detecting an average amplitude of the received signal, and a divider circuit (84) for normalizing an output of the matched filter (82) by an output of the average amplitude detector circuit 83 are provided. The output of the matched filter (82) normalized by the divider circuit (84) is compared with a threshold value for outputting a correlation detecting signal. When a received signal level is large, the output level of the matched filter (82) becomes large. However, in this case because the average amplitude of the received signal also becomes large, a divided value of the output level of the matched filter (82) by the output level of the average amplitude detector circuit (83) makes almost no change. In contrast to this, the output level of the matched filter when an M sequence is received remains nearly constant irrespective of an input signal level. Therefore, the received signal of M sequence can be detected without fail from the output of the comparator circuit (85).

摘要翻译： 即使当具有不同幅度的多个信号被时分复用时，相关检测装置也能够安全地检测形成用于定时的基准的M序列码，包括用于从接收信号中检测预定码的匹配滤波器（82），平均幅度 检测电路（83），用于检测接收信号的平均幅度;以及分频电路（84），用于通过平均振幅检测器电路83的输出对匹配滤波器（82）的输出进行归一化。 由除法器电路（84）归一化的匹配滤波器（82）的输出与用于输出相关检测信号的阈值进行比较。 当接收信号电平较大时，匹配滤波器（82）的输出电平变大。 然而，在这种情况下，由于接收信号的平均幅度也变大，所以匹配滤波器（82）的输出电平的平均幅度检测电路（83）的输出电平的分压值几乎没有变化。 与此相反，当接收到M序列时，匹配滤波器的输出电平与输入信号电平无关，保持几乎恒定。 因此，可以从比较器电路（85）的输出端不间断地检测M序列的接收信号。

公开(公告)号：US06515960B1

公开(公告)日：2003-02-04

申请号：US09139892

申请日：1998-08-25

申请人： Takashi Usui ,  Hisaki Hiraiwa ,  Takehiro Sugita

发明人： Takashi Usui ,  Hisaki Hiraiwa ,  Takehiro Sugita

IPC分类号： H04J1100

CPC分类号： H04L5/023

摘要： A radio communication system is formed of a plurality of radio communication terminals and a radio communication control terminal for controlling radio communication. Data communication is performed between each radio communication terminal and the radio communication control terminal by the orthogonal frequency division multiplexing (OFDM) method. Data is multiplexed with a frame structure having the specified number of symbols by the TDMA method. The radio communication control terminal transmits a synchronization acquisition code to the plurality of radio communication terminals in each frame. Each radio communication terminal receives the synchronization acquisition code, sets a timer according to the receiving timing of the synchronization acquisition code, and sets the transmission timing and the receiving timing with the timer being used as the reference. With the use of the OFDM method, demodulation is performed without an error even if jitter occurs. Since the timing of transmission and receiving is set with an M sequence at the top of a frame being used as a reference, the timer of each radio communication terminal is set to the same time. With the use of this time information, only necessary symbols in a frame are demodulated to reproduce the data at receiving.

摘要翻译： 无线电通信系统由多个无线电通信终端和用于控制无线电通信的无线电通信控制终端形成。 通过正交频分复用（OFDM）方法在各无线通信终端与无线通信控制终端之间进行数据通信。 数据通过TDMA方法与具有指定数目的符号的帧结构复用。 无线通信控制终端在各帧中向多个无线通信终端发送同步捕获码。 每个无线电通信终端接收同步捕获码，根据同步捕获码的接收定时设置定时器，并且将定时器用作基准来设置发送定时和接收定时。 通过使用OFDM方式，即使发生抖动也能够进行解调。 由于以作为参考的帧的顶部的M序列来设置发送和接收的定时，因此每个无线电通信终端的定时器被设置为相同的时间。 通过使用这个时间信息，仅解码帧中必需的符号以在接收时再现数据。

公开(公告)号：US06775464B2

公开(公告)日：2004-08-10

申请号：US10037793

申请日：2002-01-03

申请人： Akira Ogino ,  Takehiro Sugita ,  Takashi Usui

发明人： Akira Ogino ,  Takehiro Sugita ,  Takashi Usui

IPC分类号： H04N591

CPC分类号： H04N5/913 ,  H04N2005/91314 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/9135

摘要： A playback device 10 generates a PN code with a start timing based on a video sync signal, and generates a PN inverse code which has a reverse polarity to that of the PN code with a timing based on the video sync signal. An anti-duplication control signal is spectrally spread using this PN code, superimposed on the video signal and supplied to a recording device. A PN inverse code which is the same as the PN inverse code used in the playback device is also generated in the recording device based on the video sync signal, and reverse spectral spread is performed using this PN inverse code.

摘要翻译： 回放装置10基于视频同步信号产生具有开始定时的PN码，并且产生具有与基于视频同步信号的定时相比具有与PN码相反极性的PN反码。 使用该PN码对反复制控制信号进行频谱扩展，叠加在视频信号上并提供给记录装置。 基于视频同步信号也在记录装置中产生与重放装置中使用的PN反码相同的PN反码，并使用该PN反码执行反频谱扩展。

公开(公告)号：US06381402B1

公开(公告)日：2002-04-30

申请号：US09636204

申请日：2000-08-10

申请人： Takehiro Sugita ,  Akira Ogino ,  Takashi Usui

发明人： Takehiro Sugita ,  Akira Ogino ,  Takashi Usui

IPC分类号： H04N591

CPC分类号： H04N5/913 ,  H04N2005/91314 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/9135

摘要： The invention intends to secure the control of duplicating information signals. In the duplication control method according to the invention, a main information signal containing a duplication control information transformed into a spread spectrum signal to be superimposed and a duplication control information superimposed by a processing different from the spectrum spreading is transmitted. The duplication control information transformed into a spread spectrum signal is extracted from the main information signal by the reverse spectrum spreading, and the duplication control information superimposed by the different processing is extracted from the main information signal. One information most closest to duplication prohibition is selected as an output duplication control information out of the plural extracted duplication control information. On the basis of the selected output duplication control information, the main information signal is controlled on duplication.

公开(公告)号：US06330393B1

公开(公告)日：2001-12-11

申请号：US08968115

申请日：1997-11-12

申请人： Takashi Usui ,  Takehiro Sugita ,  Akira Ogino

发明人： Takashi Usui ,  Takehiro Sugita ,  Akira Ogino

IPC分类号： H04N5913

CPC分类号： H04N5/913 ,  H04N2005/91314 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/9135

摘要： The invention provides an information duplication prevention method and an information duplication prevention device capable of performing correct and proper duplication prevention. Prior to transmission of the information signal such as video signal, an anti-duplication control signal for preventing duplication of the information signal is transmitted. The reception side for receiving the information signal can arrange the condition for performing duplication prevention control based on the previously received anti-duplication control signal prior to reception of the information signal.

摘要翻译： 本发明提供能够进行正确和适当的复制防止的信息复制防止方法和信息复制防止装置。 在发送诸如视频信号的信息信号之前，发送用于防止信息信号复制的反复制控制信号。 用于接收信息信号的接收侧可以在接收到信息信号之前，基于先前接收到的反复制控制信号来布置用于执行防复制控制的条件。

公开(公告)号：US06453118B2

公开(公告)日：2002-09-17

申请号：US08968118

申请日：1997-11-12

申请人： Takehiro Sugita ,  Akira Ogino ,  Takashi Usui

发明人： Takehiro Sugita ,  Akira Ogino ,  Takashi Usui

IPC分类号： H04N591

CPC分类号： H04N5/913 ,  H04N2005/91314 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/9135

摘要： The level of the spectrally spread anti-duplication control signal to be superimposed on an information signal such as a video signal is changed by using a random number RD generated by a random number generation unit 163. Since it is difficult to follow after the change of the level of the spectrally spread anti-duplication control signal, elimination of the anti-duplication control signal from the information signal is made further difficult. This can reliably provide the anti-duplication control signal to the receiving side.

摘要翻译： 通过使用由随机数生成单元163产生的随机数RD来改变要叠加在诸如视频信号的信息信号上的频谱扩展的反复制控制信号的电平。由于在随机数生成单元163的改变之后难以遵循 频谱扩展的反复制控制信号的电平，信息信号的反复制控制信号的消除进一步困难。 这可以可靠地将反复制控制信号提供给接收侧。

公开(公告)号：US06389137B1

公开(公告)日：2002-05-14

申请号：US08951027

申请日：1997-10-15

申请人： Takehiro Sugita ,  Akira Ogino ,  Takashi Usui

发明人： Takehiro Sugita ,  Akira Ogino ,  Takashi Usui

IPC分类号： H04K110

CPC分类号： H04N5/913 ,  H04N2005/91314 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/9135

摘要： A playback device generates a Pseudo-random noise (PN) code sequence repeatedly with a predetermined period in synchronism with a video sync signal. An anti-duplication control signal is spectrally spread using this generated PN code sequence, is superimposed on the video signal, and is output. A PN code sequence having the same timing and code pattern as the PN code sequence used in the playback device is similarly generated based on the video sync signal on the receiving side which receives the output video signal. Using this PN code sequence, reverse spectral spread is performed, the anti-duplication control signal superimposed on the video signal is extracted, and anti-duplication control is performed according to the extracted anti-duplication control signal.

摘要翻译： 重放装置与视频同步信号同步地以预定周期重复产生伪随机噪声（PN）码序列。 使用该生成的PN码序列对反复制控制信号进行频谱扩展，叠加在视频信号上并被输出。 基于接收到输出视频信号的接收侧的视频同步信号，类似地产生具有与重放装置中使用的PN码序列相同的定时和码型的PN码序列。 使用该PN码序列，执行反向频谱扩展，提取叠加在视频信号上的反复制控制信号，并根据提取的反复制控制信号进行反复制控制。

公开(公告)号：US06370320B1

公开(公告)日：2002-04-09

申请号：US09625247

申请日：2000-07-25

申请人： Takehiro Sugita ,  Akira Ogino ,  Takashi Usui

发明人： Takehiro Sugita ,  Akira Ogino ,  Takashi Usui

IPC分类号： H04N591

CPC分类号： H04N5/913 ,  H04N2005/91314 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/9135

摘要： The invention intends to secure the control of duplicating information signals. In the duplication control method according to the invention, a main information signal containing a duplication control information transformed into a spread spectrum signal to be superimposed and a duplication control information superimposed by a processing different from the spectrum spreading is transmitted. The duplication control information transformed into a spread spectrum signal is extracted from the main information signal by the reverse spectrum spreading, and the duplication control information superimposed by the different processing is extracted from the main information signal. One information most closest to duplication prohibition is selected as an output duplication control information out of the plural extracted duplication control information. On the basis of the selected output duplication control information, the main information signal is controlled on duplication.

摘要翻译： 本发明旨在确保复制信息信号的控制。 在根据本发明的复制控制方法中，发送包含变换成要叠加的扩频信号的复制控制信息的主信息信号和通过与频谱扩展不同的处理叠加的复制控制信息。 通过反向扩频从主信息信号中提取变换为扩频信号的复制控制信息，并从主信息信号中提取由不同处理叠加的复制控制信息。 选择最接近复制禁止的一个信息作为多个提取的复制控制信息中的输出复制控制信息。 基于选择的输出复制控制信息，主信息信号被重复地控制。

公开(公告)号：US07027100B2

公开(公告)日：2006-04-11

申请号：US09749212

申请日：2000-12-27

申请人： Akira Ogino ,  Takehiro Sugita ,  Takashi Usui

发明人： Akira Ogino ,  Takehiro Sugita ,  Takashi Usui

IPC分类号： H04N7/04 ,  H04N7/167 ,  H04N5/91

CPC分类号： H04N5/913 ,  H04N2005/91314 ,  H04N2005/91321 ,  H04N2005/91328 ,  H04N2005/9135

摘要： This invention provides an image transmission method, image anti-duplication method, image anti-duplication device, and image recording medium in which the information for anti-duplication control is superimposed on the video signal without deterioration of the resultant video signal and the information is extracted accurately and quickly to perform anti-duplication control.The output device starts generation of PN code correspondingly to the PN code start timing signal T1 generated based on the video sync signal. One chip interval of the PN code is divided to a plurality of divided chips correspondingly to the PN code inversion timing signal HT, and the original value of the chip is inverted on alternate one divided interval to generate the PN inversion code. The anti-duplication control signal is subjected to spectral spreading using the PN inversion code and superimposed on the video signal. In the recording device which receives supply of the video signal from the output device, inversion spectral spreading is performed based on the PN inversion code generated in the same way as that generated in the output device.

摘要翻译： 本发明提供一种图像传输方法，图像反复制方法，图像反复制装置和图像记录介质，其中防复制控制信息叠加在视频信号上，而不会导致视频信号的恶化，信息是 提取准确，快速地执行反复制控制。 输出装置根据视频同步信号产生的PN码开始定时信号T 1开始生成PN码。 对应于PN码反转定时信号HT，PN码的一个码片间隔被分割成多个分割的码片，并且码片的原始值在交替的一个分割间隔上被反转以产生PN反转码。 使用PN反转码对反复制控制信号进行频谱扩展，并叠加在视频信号上。 在从输出装置接收到视频信号的提供的记录装置中，基于与输出装置中生成的PN反转码相同的方式，进行反向频谱扩展。