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    • 52. 发明授权
    • Analog signal synthesizing processing circuit with periodic noise
compensation
    • 具有周期噪声补偿的模拟信号合成处理电路
    • US4851934A
    • 1989-07-25
    • US95953
    • 1987-09-14
    • Hisaharu TakeuchiTeruo Itami
    • Hisaharu TakeuchiTeruo Itami
    • H04N5/213G11B20/24H04N5/93H04N9/802
    • H04N9/802G11B20/24
    • An analog signal synthesizing processing circuit with a periodic noise compensation generates analog signal of a plurality of audio signals and so forth containing noise generated almost periodically, for example by head switching of VTR, and plurality of analog signals containing the noise are phase-synchronized with given sampling clock signal and phase synchronizing circuit by timing oscillating circuit, the phase-synchronized signal is output from reproductive audio signal processing circuit, converted into digital signal by analog-digital converter and the noise contained in this converted signal is approximated from its preceding and following signal by compensation processing circuit and this approximated signal is converted into analog signal by digital-analog converter.
    • 具有周期性噪声补偿的模拟信号合成处理电路产生包含几乎周期性地产生的噪声的多个音频信号等的模拟信号,例如通过VTR的头切换,并且包含噪声的多个模拟信号与 给定采样时钟信号和相位同步电路通过定时振荡电路,相位同步信号由生殖音频信号处理电路输出,由模拟数字转换器转换为数字信号,该转换信号中包含的噪声从前面和后面近似, 通过补偿处理电路跟随信号,该近似信号由数模转换器转换为模拟信号。
    • 54. 发明授权
    • Video system with a special reproduction mode using an image memory
    • 具有使用图像存储器的特殊再现模式的视频系统
    • US4788604A
    • 1988-11-29
    • US907381
    • 1986-09-15
    • Hisaharu Takeuchi
    • Hisaharu Takeuchi
    • H04N5/907H04N5/937H04N5/782
    • H04N5/937
    • An image memory control device for a video signal special reproduction system comprises a write-in section for writing in a video signal including a signal wherein the number of horizontal scan lines per field period is a multiple of 0.5 or not a multiple of 0.5 to a memory during one field period, selection signal generation section for generating a first selection signal or a second selection signal when it is determined that the number of horizontal scan lines per field period of the video signal which is written in the memory is close to an integer or close to a multiple of one-half, respectively, and readout section for repeatedly reading out a number of times the video signal to be subjected to special reproduction which is written in the memory, in response to the disignation of the special reproduction mode, by selectively renewing a read-out address of the memory into a starting address at elapsed one field period of the video signal or at elapsed sum or difference period between one field period of the video signal and 1/2 horizontal scan period, in response to the output signal from the selection signal generating section, so that the number of horizontal scan lines corresponding to a transient portion of adjacent fields of a readout video signal is constantly an integer or a multiple of one-half having a constant fraction smaller than .+-.1/4.
    • 用于视频信号特殊再现系统的图像存储器控制装置包括写入部分,用于写入包括信号的视频信号,其中每场周期的水平扫描线的数量是0.5的倍数或不是0.5的倍数 在一个场周期中的存储器,当确定写入存储器中的视频信号的每个场周期的水平扫描线的数量接近整数时,用于产生第一选择信号或第二选择信号的选择信号生成部分 或接近一半的倍数,以及读出部分,用于响应于特殊再现模式的脱离,重复读出写入存储器的要进行特殊再现的视频信号的次数, 通过选择性地将存储器的读出地址更新为视频信号的经过一个场周期的起始地址或经过的总和或差时段betw 响应于来自选择信号产生部分的输出信号,使视频信号的一个场周期和1/2水平扫描周期,使得与读出的视频信号的相邻场的瞬态部分相对应的水平扫描线的数量 始终是具有小于+/- 1/4的恒定分数的一半的整数或倍数。