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    • 28. 发明授权
    • Initializing method and data transmitter
    • 初始化方法和数据发送器
    • US07012936B2
    • 2006-03-14
    • US10398452
    • 2001-10-05
    • Hirotsugu KawadaYuji MizuguchiTakahisa SakaiNoboru KattaToshihiko KurosakiNobuhiko YasuiYutaka Takahira
    • Hirotsugu KawadaYuji MizuguchiTakahisa SakaiNoboru KattaToshihiko KurosakiNobuhiko YasuiYutaka Takahira
    • H04J3/06
    • H04L25/085H04J3/0638H04L7/046H04L7/10H04L25/062H04L25/066H04L25/4919
    • A first initialization pattern signal is a signal in which a maximum signal level and a minimum signal level appear alternately, and a second initialization pattern signal is a signal in which all signal levels appear in a predetermined arrangement. In a ring-shaped network including plural stages of data transmission apparatuses (100), a transmission unit (110) of each data transmission apparatus outputs the first initialization pattern signal successively to a next-stage data transmission apparatus at turn-on of power or immediately after reset, and a reception unit (120) establishes clock synchronization on the basis of the first initialization pattern signal received. When synchronization is established in all of the data transmission apparatuses, the transmission unit (110) outputs the second initialization pattern signal successively to the next-stage data transmission apparatus, and the reception unit (120) sets evaluation levels for the respective signal levels on the basis of the received second initialization pattern signal, and transmission/reception of data is started when evaluation levels are set in all of the data transmission apparatuses.
    • 第一初始化模式信号是其中最大信号电平和最小信号电平交替出现的信号,并且第二初始化模式信号是其中所有信号电平以预定布置出现的信号。 在包括多级数据传输装置(100)的环形网络中,每个数据传输装置的传输单元(110)将第一初始化模式信号连续地输出到下一级数据传输装置, 并且接收单元(120)基于所接收的第一初始化模式信号建立时钟同步。 当在所有数据传输装置中建立同步时,发送单元(110)将第二初始化模式信号连续地输出到下一级数据发送装置,并且接收单元(120)将各信号电平的评估电平设置为 当在所有数据传输装置中设置评估级别时,开始接收到的第二初始化模式信号的基础和数据的发送/接收。
    • 30. 发明授权
    • Scrambling apparatus and descrambling apparatus
    • 加扰装置和解扰装置
    • US5706346A
    • 1998-01-06
    • US321757
    • 1994-10-12
    • Noboru KattaHiroki MurakamiSusumu IbarakiSeiji Nakamura
    • Noboru KattaHiroki MurakamiSusumu IbarakiSeiji Nakamura
    • H04N7/167
    • H04N7/1675
    • A scrambling apparatus has at least one of the following processing units: a signal inserting processor for inserting a dummy pattern indicating the quantization width in the compressed video data; a conversion processor for scrambling a signal specifying whether field or frame processing is used; a DCT coefficient conversion processor for scrambling a part of the code defining the DCT coefficient; an intra.sub.-- dc.sub.-- precision conversion processor for scrambling the intra.sub.-- dc.sub.-- precision signal; and an alternate.sub.-- scan conversion processor for scrambling the alternate .sub.-- scan signal. A descrambling apparatus reverses the conversion process on the video data scrambled by the scrambling apparatus to restore the video data to the original unscrambled state.
    • 加扰装置具有以下处理单元中的至少一个:信号插入处理器,用于将指示量化宽度的虚拟图案插入压缩视频数据中; 转换处理器,用于对指定是使用字段还是帧处理的信号进行加扰; DCT系数转换处理器,用于对定义DCT系数的代码的一部分进行加扰; 用于对所述DC内精度信号进行加扰的DC-DC精度转换处理器; 以及用于对交替扫描信号进行加扰的交替扫描转换处理器。 解扰装置对由加扰装置加扰的视频数据进行转换处理,将视频数据恢复到原来的未加扰状态。