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1. 发明专利

JP2005123981A Image signal receiver and its image-coded signal composing method 审中-公开
标题翻译：图像信号接收器及其图像编码信号组合方法
公开(公告)号：JP2005123981A
公开(公告)日：2005-05-12
申请号：JP2003358065
申请日：2003-10-17
申请人： Hitachi Communication Technologies Ltd , Hitachi Hybrid Network Co Ltd , 日立ハイブリッドネットワーク株式会社 , 株式会社日立コミュニケーションテクノロジー
发明人： TAKIZAWA MASAAKI , ENOMOTO KAZUHIRO
IPC分类号： H04N7/18 , H04N19/44 , H04N19/50 , H04N19/503 , H04N19/59 , H04N19/593 , H04N7/32
摘要： PROBLEM TO BE SOLVED: To provide a high-convenience image signal receiver which converts I-pictures into P-pictures in image-coded signals, if containing the I-pictures and the P-pictures mixed together, thus unifying the image-coded signals with the P-pictures only, and composes the image-coded signals.
SOLUTION: The receiver is composed of a decoder 3 which receives multimedia multiplexed signals (image-coded signals and sound-coded signals) transmitted from image signal transmitters T1-Tn over a communication network NT, and composes a plurality of image-coded signals of the inter-frame estimation mode and the intra-frame estimation mode in the form of the image-coded signals unified with the inter-frame estimation mode to restore single image signals; an image monitor 4 for displaying a plurality of restored image signals on one screen; and a speaker 5 for outputting restored sound signals with sounds.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供将图像编码信号中的I图像转换为P图像的高便利图像信号接收机，如果将I图像和P图像混合在一起，则将图像统一编码信号，并且构成图像编码信号。解决方案：接收机由解码器3组成，解码器3通过通信网络NT接收从图像信号发送器T1-Tn发送的多路复用信号（图像编码信号和声音编码信号），并且构成多个图像 - 以与帧间估计模式统一的图像编码信号的形式的帧间估计模式和帧内估计模式的编码信号，以恢复单个图像信号; 图像监视器4，用于在一个屏幕上显示多个恢复的图像信号; 以及用于输出具有声音的恢复的声音信号的扬声器5。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2008131144A Access point, and antenna system thereof and communication method thereof 审中-公开
标题翻译：接入点及其天线系统及其通信方法
公开(公告)号：JP2008131144A
公开(公告)日：2008-06-05
申请号：JP2006311374
申请日：2006-11-17
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： TAKIZAWA MASAAKI
IPC分类号： H04B7/08 , H04B7/06 , H04B7/26 , H04L12/28
摘要： PROBLEM TO BE SOLVED: To increase S/N in a communication system of a wireless LAN.
SOLUTION: An access point 10 has a plurality of antenna units 11a, 11b, 11c, and 11d which mutually different directivities, a radio reception processing section which processes signals received by the plurality of antenna units, and a radio transmission processing section which makes the plurality of antenna units transmit radio signals.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：增加无线LAN的通信系统中的S / N。解决方案：接入点10具有彼此不同的方向性的多个天线单元11a，11b，11c和11d，处理由多个天线单元接收的信号的无线电接收处理部分和无线电发送处理部分这使得多个天线单元发送无线电信号。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2007143038A Wireless terminal having wireless telephone function and ip telephone function, and roaming method between public wireless line and wireless local area network 有权
标题翻译：无线终端具有无线电话功能和IP电话功能，以及公共无线与无线局域网之间的漫游方法
公开(公告)号：JP2007143038A
公开(公告)日：2007-06-07
申请号：JP2005337305
申请日：2005-11-22
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： TAKIZAWA MASAAKI
IPC分类号： H04L12/28 , H04W36/14 , H04W48/18 , H04W88/02 , H04W88/06
摘要： PROBLEM TO BE SOLVED: To provide a wireless terminal which determines whether to switch to connection with a public wireless line when received power of wireless LAN radio becomes small during communication through the wireless local area network. SOLUTION: A roaming method for the wireless terminal having both of a communication function through the public wireless line and a communication function through the wireless LAN compares (S44 and S51) the received power of wireless LAN radio with previously fixed thresholds TH1 and TH2. When judging (S45 and S51) that it is required to shift from a communication function of presently speaking to another communication function, the method asks (S46 and S52) switching between communication through a public line and that through the radio LAN. Then, when a user authenticates switching, the method switches (S48 and S54) from the communication function of the presently speaking to another communication function. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种无线终端，其在通过无线局域网进行通信期间，当无线LAN无线电的接收功率变小时，确定是否切换到与公共无线线路的连接。解决方案：具有通过公共无线线路的通信功能和通过无线LAN的通信功能的无线终端的漫游方法将无线LAN无线电的接收功率（S44和S51）与先前固定的阈值TH1和 TH2。当判断（S45和S51）需要从当前通话功能切换到其他通信功能时，该方法要求（S46和S52）通过公共线路进行通信和通过无线局域网进行切换。然后，当用户认证切换时，该方法从当前通话功能到另一通信功能切换（S48和S54）。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2007060584A Real time signal priority system in wireless lan and access point in wireless lan 有权
标题翻译：无线LAN中的实时信号优先系统和无线局域网中的接入点
公开(公告)号：JP2007060584A
公开(公告)日：2007-03-08
申请号：JP2005246733
申请日：2005-08-26
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： TAKIZAWA MASAAKI
IPC分类号： H04L12/28 , H04B7/26 , H04L29/06
CPC分类号： Y02D70/00 , Y02D70/10 , Y02D70/449
摘要： PROBLEM TO BE SOLVED: To send a beacon frame and a sound signal which are desired to be sent at a regular sending time, more preferentially than a general data in a wireless LAN.
SOLUTION: Even if an AP receives an RTS signal which means a long packet length just prior to the regular sending time, the AP does not respond to a CTS, does not permit the long packet to be sent, sends a dummy signal just prior to the regular sending time further, and controls sending the data from other wireless LAN terminal.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：发送希望在常规发送时间发送的信标帧和声音信号，比无线LAN中的通用数据更优先。解决方案：即使AP在正常发送时间之前收到意味着长的分组长度的RTS信号，AP也不响应CTS，不允许发送长分组，发送虚拟信号在正常发送时间之前，进一步控制，并控制从其他无线局域网终端发送数据。版权所有（C）2007，JPO＆INPIT

5. 发明专利

JP2005210160A Video receiving terminal having communication state display 审中-公开
标题翻译：具有通信状态显示的视频接收终端
公开(公告)号：JP2005210160A
公开(公告)日：2005-08-04
申请号：JP2004011454
申请日：2004-01-20
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： SAKANO SHINJI , OKUMA KATSUMI , TAKIZAWA MASAAKI
IPC分类号： H04N17/00 , H04N7/16 , H04N7/173 , H04N21/41 , H04N21/442
摘要： PROBLEM TO BE SOLVED: To provide a video reception terminal for informing a viewer about the cause of image quality deterioration and about the interruption in display, when receiving a television video signal which utilizes best-effort type communication network. SOLUTION: An RTP-processing section 32 of a receiver side unit 31 of the video reception terminal 40 detects a communication fault. An error-processing section 34 notified with detection of error due to the communication fault transmits a display instruction to a communication state display section 35, and the communication state display section 35 lights up a state display lamp 38 for displaying the communication state to indicate the occurrence of the communication abnormality. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：当接收使用尽力而为型通信网络的电视视频信号时，提供用于向观看者通知图像质量劣化的原因和关于显示中断的视频接收终端。解决方案：视频接收终端40的接收机侧单元31的RTP处理部分32检测通信故障。由通信故障引起的错误检测通知的错误处理部34向通信状态显示部35发送显示指示，通信状态显示部35点亮用于显示通信状态的状态显示灯38，发生通信异常。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2008034914A Wireless terminal and hand-over method 有权
标题翻译：无线终端和手持方法
公开(公告)号：JP2008034914A
公开(公告)日：2008-02-14
申请号：JP2006202889
申请日：2006-07-26
申请人： Hitachi Communication Technologies Ltd , Nakayo Telecommun Inc , 株式会社ナカヨ通信機 , 株式会社日立コミュニケーションテクノロジー
发明人： TAKIZAWA MASAAKI , SHIMIZU HIROYUKI
IPC分类号： H04L12/28 , H04W36/08 , H04W36/30
摘要： PROBLEM TO BE SOLVED: To provide a technology for switching connection destination depending on communication errors and the power received.
SOLUTION: When a handover control section 132 switches connection from an access point during connection into another access point, the hand-over control section 132 calculates the error rate in the communication with the access point during the connection, and uses a different threshold, depending on the calculated error rate so as to decide whether the connection is to be switched to another access point from the access point during connection.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供根据通信错误和接收的功率来切换连接目的地的技术。解决方案：切换控制部分132在连接期间切换从接入点到另一接入点的连接，切换控制部分132计算在连接期间与接入点的通信中的错误率，并且使用不同的阈值，这取决于计算的错误率，以便在连接期间确定连接是否从接入点切换到另一个接入点。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JP2008219079A Communication system, radio repeating apparatus, and site survey method 有权
标题翻译：通信系统，无线电重发设备和站点调查方法
公开(公告)号：JP2008219079A
公开(公告)日：2008-09-18
申请号：JP2007049335
申请日：2007-02-28
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： TAKIZAWA MASAAKI , SUZUKI TSUTOMU
IPC分类号： H04L12/28 , H04B7/26
摘要： PROBLEM TO BE SOLVED: To provide a technique capable of surveying a site easily by a radio terminal communicating with an AP actually. SOLUTION: When a specific telephone number is input from the radio terminal, a site survey sound having a specific frequency is generated by a section 134 for generating a sound for SS of AP 110, and is transmitted to the radio terminal from AP 110 via a radio section 120. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够通过与AP实际通信的无线电终端容易地测量站点的技术。解决方案：当从无线电终端输入特定电话号码时，由用于生成AP 110的SS的声音的部分134产生具有特定频率的现场调查声音，并从AP发送到无线电终端（C）2008年，JPO＆INPIT

8. 发明专利

JP2007158529A Wireless communication terminal and method 有权
标题翻译：无线通信终端和方法
公开(公告)号：JP2007158529A
公开(公告)日：2007-06-21
申请号：JP2005348155
申请日：2005-12-01
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： TAKIZAWA MASAAKI , SUZUKI TSUTOMU
IPC分类号： H04L12/28 , H04W52/02 , H04W74/04 , H04W74/06 , H04W88/08
CPC分类号： Y02D70/00 , Y02D70/10
摘要： PROBLEM TO BE SOLVED: To enhance a transmission efficiency in a wireless LAN. SOLUTION: Each wireless communication terminal in each wireless LAN analyzes beacon signals from APs and determines a communication sequence on the basis of control data in the beacon signals when discriminating presence of communication data addressed to its own terminal. Then each wireless communication terminal determines a timing in a communication time zone between its own terminal and the concerned AP depending on the communication sequence of its own terminal. For example, the start timing in the communication time zone of the terminal 10a whose communication sequence is first is a time of receiving the beacon signals, and the start timings of the communication time zone of the terminals 10b, 10c whose communication sequences are second and third are respectively times in a lapse of respectively T and 2T after receiving the beacon signals. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提高无线LAN中的传输效率。解决方案：每个无线LAN中的每个无线通信终端分析来自AP的信标信号，并且当识别寻址到其自己的终端的通信数据的存在时，基于信标信号中的控制数据来确定通信序列。然后，每个无线通信终端根据其自身终端的通信顺序来确定其自身终端与有关AP之间的通信时区中的定时。例如，通信序列为终端的终端10a的通信时间段的开始定时是接收信标信号的时间，通信顺序为秒的终端10b，10c的通信时间段的开始定时，在接收到信标信号之后，第三个分别是分别为T和2T的时间。版权所有（C）2007，JPO＆INPIT

9. 发明专利

JP2006311178A Digital picture communication system, digital picture coding apparatus, and digital picture decoding apparatus 有权
标题翻译：数字图像通信系统，数字图像编码设备和数字图像解码设备
公开(公告)号：JP2006311178A
公开(公告)日：2006-11-09
申请号：JP2005130960
申请日：2005-04-28
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： MATSUMOTO TADASHI , TAKIZAWA MASAAKI , NISHIJIMA TAKAYUKI
IPC分类号： H03M7/30 , H04N1/41 , H04N19/102 , H04N19/134 , H04N19/136 , H04N19/196 , H04N19/423 , H04N19/50 , H04N19/503 , H04N19/59
摘要： PROBLEM TO BE SOLVED: To reduce a band to be used by a communication network in a digital picture communication system.
SOLUTION: This digital picture communication system comprises a digital picture generation apparatus 1, a digital picture coding apparatus 2 which writes a digital picture signal received from the generation apparatus 1 in a frame memory (FM), rewrites a digital picture signal written in the FM to a new digital picture signal successively when the new digital picture signal is received, judges whether or not the newly received digital picture signal differs from the former digital picture signal written in the FM by comparing them one bit at a time, reads out the new digital picture signal written in the FM successively and applies coding processing to the signal when there is a difference, and sends the signal out as a digital coded signal, a communication network 3, and a digital picture decoding apparatus 4 which outputs a decoded picture signal obtained by successively applying decoding processing to the digital coded signal received from the coding apparatus 2, to a picture display device 5.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：减少数字图像通信系统中通信网络使用的频带。解决方案：该数字图像通信系统包括数字图像生成装置1，将从生成装置1接收的数字图像信号写入帧存储器（FM）的数字图像编码装置2，重写写入的数字图像信号在接收到新的数字图像信号时连续地将FM转换成新的数字图像信号，通过一次比较它们来判断新接收的数字图像信号是否与写入FM中的前一个数字图像信号不同，读取连续输出写入FM的新的数字图像信号，并且当存在差异时对信号应用编码处理，并且作为数字编码信号发送信号，通信网络3和数字图像解码装置4，其输出通过对从编码装置2接收到的数字编码信号连续地应用解码处理获得的解码图像信号到图像dis 播放设备5.版权所有（C）2007，JPO＆INPIT

10. 发明专利

JP2006310994A Radio lan connection device and packet length control method 有权
标题翻译：无线局域网连接设备和分组长度控制方法
公开(公告)号：JP2006310994A
公开(公告)日：2006-11-09
申请号：JP2005128789
申请日：2005-04-27
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： TAKIZAWA MASAAKI
IPC分类号： H04L12/28
摘要： PROBLEM TO BE SOLVED: To reduce transmission errors and suppress transmission delays at the same time by improving propagation efficiency when voices are transmitted through a radio LAN. SOLUTION: When a voice packet integrating unit receives the voice-encoded data length N of a voice packet which is regenerated and determined corresponding to a load volume imposed on a transmission path based on a data volume that is transmitted and received from or by a communication processing unit per unit time (S701, S702), the voice packet integrating unit integrates voice-encoded data contained in the voice packets received from a router unit, forms a voice packet so as to make its voice-encoded data as long as the voice-encoded data length N, and keeps voice communications with radio LAN terminals (S703, S706). COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：通过在通过无线LAN发送语音时提高传播效率，同时减少传输错误并抑制传输延迟。解决方案：当语音分组整合单元接收到语音分组的语音编码数据长度N时，该语音分组的数据长度N是根据从传输路径发送和接收的数据量而对施加在传输路径上的载荷量进行再生和确定的通过每单位时间的通信处理单元（S701，S702），语音分组整合单元对包含在从路由器单元接收的语音分组中的语音编码数据进行积分，形成语音分组，使其语音编码数据长作为语音编码数据长度N，并且与无线电LAN终端保持语音通信（S703，S706）。版权所有（C）2007，JPO＆INPIT

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