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    • 5. 发明公开
    • Frequency multiplexing
    • Frequenzmultiplexierung
    • EP1185019A2
    • 2002-03-06
    • EP01120914.5
    • 2001-08-30
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • Tatsuta, AkihiroTanaka, ShotaroArii, Koji
    • H04L5/06
    • H04H20/34H04H20/62H04H20/83H04J1/08H04L1/0003H04L5/06
    • A signal distribution system has

      a transmission means of respectively allocating different frequencies to a plurality of signals and of transmitting the signals by utilizing the allocated frequencies and
      communication paths for transmitting the plurality of signals to be transmitted and
      a plurality of reception means of receiving signals to which the corresponding frequencies are allocated based on predetermined corresponding relationships from among the transmitted plurality of signals characterized in that
      wherein the corresponding relationships are corresponding relationships between each of the frequencies and each of the reception means that have been predetermined based on substantial distances between the transmission means and each of the reception means along the communication paths.
    • 信号分配系统具有分别向多个信号分配不同频率的发送装置,并且利用所分配的频率和通信路径发送多个要发送的信号的发送装置和接收信号的多个接收装置 基于来自所发送的多个信号中的预定对应关系来分配对应的频率,其特征在于,其中对应关系是基于传输之间的实际距离已经预先确定的每个频率和每个接收装置之间的对应关系 沿着通信路径的装置和每个接收装置。
    • 7. 发明申请
    • AUDIO-ON-DEMAND COMMUNICATION SYSTEM
    • 音频通信通信系统
    • WO1996017451A1
    • 1996-06-06
    • PCT/US1995014765
    • 1995-11-14
    • PROGRESSIVE NETWORKS
    • PROGRESSIVE NETWORKSGLASSER, Robert, D.O'BRIEN, MarkBOUTELL, Thomas, B.GOLDBERG, Randy, Glen
    • H04H01/02
    • H04H20/46H04H20/28H04H20/30H04H20/40H04H20/82H04H20/83H04H60/27H04H60/51H04H60/73
    • An audio-on-demand communication system provides real-time playback of audio data transferred via telephone lines or other communication links. One or more audio servers include memory banks which store compressed audio data. At the request of a user at a subscriber PC, an audio server transmits the compressed audio data over the communication link to the subscriber PC. The subscriber PC receives and decompresses the transmitted audio data in less than real-time using only the processing power of the CPU within the subscriber PC. According to one aspect of the present invention, high quality audio data compressed according to lossless compression techniques is transmitted together with normal quality audio data. According to another aspect of the present invention, metadata, or extra data, such as text, captions, still images, etc., is transmitted with audio data and is simultaneously displayed with corresponding audio data. The audio-on-demand system also provides a table of contents indicating significant divisions in the audio clip to be played and allows the user immediate access to audio data at the listed divisions. According to a further aspect of the present invention, servers and subscriber PCs are dynamically allocated based upon geographic location to provide the highest possible quality in the communication link.
    • 音频按需通信系统提供经由电话线或其他通信链路传送的音频数据的实时回放。 一个或多个音频服务器包括存储压缩音频数据的存储器组。 在用户PC的用户请求下,音频服务器通过通信链路将压缩的音频数据发送给用户PC。 订户PC仅使用用户PC内的CPU的处理能力,以不太实时的方式接收并解压发送的音频数据。 根据本发明的一个方面,根据无损压缩技术压缩的高质量音频数据与普通质量音频数据一起发送。 根据本发明的另一方面,用音频数据发送诸如文本,标题,静止图像等的元数据或额外数据,并且与对应的音频数据同时显示。 音频点播系统还提供指示要播放的音频剪辑中的显着划分的内容表,并允许用户立即访问列出的部门的音频数据。 根据本发明的另一方面,基于地理位置动态地分配服务器和订户PC,以在通信链路中提供最高可能的质量。
    • 9. 发明专利
    • Antenna system for reception of synchronizing broadcast
    • 用于接收同步广播的天线系统
    • JPS60210011A
    • 1985-10-22
    • JP6558884
    • 1984-04-02
    • Masashi MitsukaichiYagi Antenna Co Ltd
    • TAKAHASHI AKIRAMITSUKAICHI MASASHI
    • H01Q1/32H01Q21/29H04H20/83H04H40/18
    • H04H20/83H01Q21/29H04H40/18
    • PURPOSE:To attain the stable reception among areas having the same level of electric power at the middle part between adjacent broadcast stations in a synchronizing broadcast system, by synthesizing the outputs of monopole antenna and multi-turn loop antennas formed on ferrite bars. CONSTITUTION:A whip antenna 11 is used to receive the electric fields, and bar antennas 12 and 13 formed by winding coils round ferrite bars are set orthogonal to each other to receive the magnetic fields. The outputs of antennas 12 and 13 are connected in parallel by an impedance matching box 14, and a capacitance is used to secure the parallel tuning between the outputs of both antennas 12 and 13 and the reactance of a loop antenna. This induced voltage is dropped by a transformer, etc. to secure the matching of impedance and then synthesized with the output of the antenna 11 by a synthesizer 15. Then this synthetic output is led to a receiver 16.
    • 目的:通过合成单极天线和形成在铁素体棒上的多匝环形天线的输出,在同步广播系统中,在相邻广播电台之间的中间部分具有相同电力水平的区域之间实现稳定的接收。 构成:使用鞭状天线11来接收电场,并且通过将铁氧体磁棒卷绕形成的棒状天线12和13彼此正交设置以接收磁场。 天线12和13的输出通过阻抗匹配箱14并联连接,并且使用电容来确保天线12和13的输出之间的并联调谐以及环形天线的电抗。 该感应电压由变压器等降低以确保阻抗的匹配,然后由合成器15与天线11的输出合成。然后,该合成输出被引导到接收器16。