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    • 1. 发明授权
    • Television receiver having interlaced scanning with doubled field
frequency
    • 具有双倍场频隔行扫描的电视接收机
    • US4672446A
    • 1987-06-09
    • US758222
    • 1985-07-18
    • Yasunari IkedaHiroshi NakanoHirofumi Yuchi
    • Yasunari IkedaHiroshi NakanoHirofumi Yuchi
    • H04N7/01
    • H04N7/0132Y10S348/91
    • A television receiver in which a video signal of an interlaced system is received and converted in field frequency by using field memories (6a) and (6b) and then fed to a picture receiving tube (9). In this case, the picture receiving tube (9) is subjected to a vertical deflection scanning by a vertical synchronizing signal of a constant period and the video signal in each field of the video signal to be supplied to the picture receiving tube (9) is delayed by a predetermined time by controlling, for example, the read-out timings of the field memories (6a) and (6b) to thereby keep an interlace-ratio constant. Consequently, since the respective vertical cycles are equal to one another, even if the parabolic current wave of the vertical cycle for deflection correcting, for example, is superposed on the horizontal deflecting current, the horizontal deflection current waveform is equal in each vertical period so that the jitter can be prevented from being produced at the right and left ends of the picture screen.
    • PCT No.PCT / JP84 / 00553 Sec。 371日期:1985年7月18日 102(e)日期1985年7月18日PCT提交1984年11月19日PCT公布。 第WO85 / 02511号公报 日期:1985年6月6日。一种电视接收机,其中通过使用场存储器(6a)和(6b)接收并以场频率转换隔行扫描系统的视频信号,然后馈送给图像接收管(9)。 在这种情况下,图像接收管(9)通过恒定周期的垂直同步信号进行垂直偏转扫描,并且要提供给图像接收管(9)的视频信号的每个场中的视频信号是 通过控制例如场存储器(6a)和(6b)的读出定时来延迟预定时间,从而保持交错比恒定。 因此,由于各垂直周期彼此相等,所以即使例如用于偏转校正的垂直周期的抛物线电流波叠加在水平偏转电流上,每个垂直周期中的水平偏转电流波形相等 可以防止在画面的右端和左端产生抖动。
    • 2. 发明授权
    • Double-scanning non-interlace television receiver
    • 双扫描非隔行电视接收机
    • US4539592A
    • 1985-09-03
    • US526064
    • 1983-08-24
    • Yutaka TanakaYasunari IkedaHiroshi Nakano
    • Yutaka TanakaYasunari IkedaHiroshi Nakano
    • H04N7/01H04N5/02
    • H04N7/012
    • A television receiver having a signal input terminal supplied with an interlace video signal and a signal coverter connected to the input terminal for converting the interlace video signal to a non-interlace signal to be displayed. The signal converter includes a signal inserting circuit for inserting new line signals between two successive line signals of the interlace signal, the new line signals being formed by interpolating one of the preceding and succeeding line signals in the interlace signal. A three dimensional filter is connected to the signal converter for attentuating vertical and horizontal high frequency components in the non-interlace video signal only when the non-interlace signal includes both of the vertical and horizontal high frequency components.
    • 具有提供隔行扫描视频信号的信号输入端的电视接收机和连接到输入端的信号覆盖器,用于将隔行扫描视频信号转换成要被显示的隔行信号。 信号转换器包括用于在隔行信号的两个相继行信号之间插入新行信号的信号插入电路,通过在隔行扫描信号中插入前一和后一行信号之一来形成新的线信号。 只有当非隔行信号包括垂直和水平高频分量两者时,三维滤波器连接到信号转换器,用于注意非逐行视频信号中的垂直和水平高频分量。
    • 4. 发明授权
    • OFDM receiving device and OFDM receiving method
    • OFDM接收装置和OFDM接收方法
    • US07403472B2
    • 2008-07-22
    • US11089810
    • 2005-03-25
    • Takahiro OkadaYoshikazu MiyatoYasunari IkedaTamotsu Ikeda
    • Takahiro OkadaYoshikazu MiyatoYasunari IkedaTamotsu Ikeda
    • H04J11/00
    • H04L27/2656H04L5/023
    • The time required for switch the channel can be remarkably curtailed. When broadcasting signals through a plurality of information channels with an OFDM system, the plurality of information channels are multiplexed in the sense of frequency and collectively subjected to IFFT modulation for connected transmission instead of subjecting the plurality of information channels independently to OFDM modulation for transmission. With this arrangement, the efficiency of exploitation of frequencies is improved. According to the invention, the OFDM frames are synchronized for each information channel for the purpose of connected transmission. Then, the OFDM receiver can switch the information channel for signal reception, maintaining the frame synchronizing signals.
    • 切换通道所需的时间可以大大减少。 当通过具有OFDM系统的多个信息信道广播信号时,多个信息信道在频率上被多路复用,并且对于所连接的发送集中地进行IFFT调制,而不是独立地对多个信道进行OFDM调制以进行传输。 通过这种安排,提高了频率利用的效率。 根据本发明,为了连接传输的目的,为每个信息信道同步OFDM帧。 然后,OFDM接收机可以切换用于信号接收的信道,保持帧同步信号。
    • 6. 发明授权
    • Receiving apparatus and receiving method
    • 接收装置和接收方法
    • US5920598A
    • 1999-07-06
    • US67651
    • 1998-04-27
    • Toshihisa HyakudaiYasunari Ikeda
    • Toshihisa HyakudaiYasunari Ikeda
    • H04J11/00H04L27/26H04L27/06H04L5/06
    • H04L27/265H04L27/2657H04L27/2675
    • An apparatus and method for receiving an OFDM signal arranged to reproduce correct carriers. I channel data and Q channel data decomposed into subcarrier components by FFT processing are differential-demodulated by a differential demodulation circuit to remove an FFT window phase error and a reproducing carrier phase error. In a differential demodulation circuit, a reproducing carrier frequency error and a phase error dependent on a reproducing clock frequency error are removed and only I-axis data is thereafter output to be stored in a RAM with respect each symbol. A pilot signal selecting data generation circuit supplies the RAM with data which is prepared by suitably shifting pilot signal selecting data used as a reference. Resulting Data read out is accumulated by cumulative addition performed by a cumulative addition circuit. A maximum value detection circuit detects a maximum value of the output from the cumulative addition circuit, and the amount of shift of pilot signal selecting data is stored in a reproducing carrier frequency error storage circuit. The reproducing carrier frequency error storage circuit outputs the amount of shift corresponding to the maximum value.
    • 一种用于接收布置成再现正确载波的OFDM信号的装置和方法。 通过FFT处理分解成子载波分量的I信道数据和Q信道数据被差分解调电路差分解调,以消除FFT窗口相位误差和再现载波相位误差。 在差分解调电路中,去除了依赖于再现时钟频率误差的再现载波频率误差和相位误差,并且此后只有I轴数据被输出以存储在每个符号的RAM中。 导频信号选择数据生成电路向RAM提供通过适当地移动用作基准的导频信号选择数据而准备的数据。 所得到的数据读出通过累积加法电路的累计加法累积。 最大值检测电路检测累积加法电路的输出的最大值,并将导频信号选择数据的移位量存储在再现载波频率误差存储电路中。 再现载波频率误差存储电路输出对应于最大值的移位量。
    • 8. 发明授权
    • Means and method of improving multiplexed transmission and reception by
coding and modulating divided digital signals
    • 通过对分割的数字信号进行编码和调制来提高多路传输和接收的方法和方法
    • US5903546A
    • 1999-05-11
    • US632411
    • 1996-07-18
    • Tamotsu IkedaYasunari IkedaTakahiro Okada
    • Tamotsu IkedaYasunari IkedaTakahiro Okada
    • H04L1/00H04L27/26H04L27/34H04N5/44H04N7/24H04N7/26H04J3/22
    • H04L27/2604H04L1/0003H04L1/0017H04L1/0054H04L1/006H04L1/0065H04L27/183H04L27/3488H04L5/0007H04L5/0042H04L5/0044H04N21/2383H04N21/4382H04L2001/0098H04N19/39H04N5/4401Y02B60/31
    • The present invention is used for example digital television broadcasting and provides a good television picture and sound where the signal level is large on the reception side and provides a television picture and sound of a certain degree of quality even in a case where the signal level is small. The signal transmitting apparatus (10) divides the series of input information in accordance with the significance of the content of the data to obtain a plurality of input signals, encodes the input signals with respectively different encoding rates, multiplexes the same at the time slots for transmission, modulates the same by multi-value modulation methods different for every time slot corresponding to the coded signals, and transmits the resultant data via the communication transmission line (20) such as a satellite communication channel to the signal receiving apparatus (30). The signal receiving apparatus (30) demodulates the respective coded signals from the modulated signals received from the communication transmission line (20) by demodulation methods different for every time slot corresponding to the coded signals contained in the received signals, demultiplexes the same, decodes the result, and reproduces the respective input signals.
    • PCT No.PCT / JP95 / 01736 Sec。 371日期:1996年7月18日 102(e)日期1996年7月18日PCT提交1995年8月31日PCT公布。 公开号WO96 / 07260 日期1996年3月7日本发明用于数字电视广播,并且在接收侧提供了良好的电视图像和声音信号电平较大,并且即使在情况下也提供一定质量的电视图像和声音 信号电平较小。 信号发送装置(10)根据数据的内容的重要性对输入信息的一系列进行划分以获得多个输入信号,以分别对不同的编码率对输入信号进行编码,在时隙多路复用 通过对与编码信号相对应的每个时隙不同的多值调制方式进行调制,并通过诸如卫星通信信道的通信传输线(20)将结果数据发送到信号接收装置(30)。 信号接收装置(30)通过与包含在接收信号中的编码信号相对应的每个时隙不同的解调方式,对从通信传输线(20)接收的调制信号中的各个编码信号进行解调,解复用 结果并再现相应的输入信号。
    • 9. 发明授权
    • Data reception apparatus, data transmission apparatus and method thereof
    • 数据接收装置,数据发送装置及其方法
    • US5867532A
    • 1999-02-02
    • US622401
    • 1996-03-27
    • Osamu ItoYasunari IkedaTamotsu Ikeda
    • Osamu ItoYasunari IkedaTamotsu Ikeda
    • H04J1/20H04J11/00H04L27/26H04L5/12
    • H04L27/2647
    • A data reception apparatus receiving a transmission signal that has been modulated by a predetermined modulation method such as a trellis coding, inserted with a predetermined reference data in a predetermined period, and transmitted through a transmission path, and that decodes the received signal. The data reception apparatus includes: a demodulating unit for demodulating the received signal and providing a demodulated signal; a reference data extracting unit for extracting the inserted reference data from the demodulated signal; an estimating unit for estimating the transmission characteristic of the transmission path with reference to the extracted reference data for providing an estimated data; and a decoding unit for decoding the demodulated signal with reference to the estimated data.
    • 一种数据接收装置,接收通过预定的参考数据以预定的时间段插入并通过传输路径发送的格网编码等规定的调制方式进行了调制的发送信号,对接收信号进行解码。 数据接收装置包括:解调单元,用于解调所接收的信号并提供解调信号; 参考数据提取单元,用于从解调信号中提取插入的参考数据; 估计单元,用于参考所提取的用于提供估计数据的参考数据来估计传输路径的传输特性; 以及解码单元,用于参照所估计的数据对解调信号进行解码。