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    • 1. 发明授权
    • Apparatus for multi-channel dividing, recording and reproducing a video
signal
    • 多通道分配,记录和再现视频信号的装置
    • US5162922A
    • 1992-11-10
    • US596329
    • 1990-10-15
    • Yoshinari TakemuraShigeru FurumiyaHiromu Kitaura
    • Yoshinari TakemuraShigeru FurumiyaHiromu Kitaura
    • H04N5/76H04N5/04H04N5/85H04N5/92H04N7/015H04N9/797H04N9/877
    • H04N9/7973H04N5/85H04N9/877
    • A video disc is produced from a master video disc which has recorded therein a video signal including a synchronous signals occurring periodically and divided into plural channels by the cycle of the synchronous signals. The plural channel signals are recorded on a group of plural tracks, respectively. In the case of reproducing the video disc, the plural channel signals are reproduced from the group of plural tracks, respectively. Synchronous signals are detected from the reproduced signals. The reproduced channel signals in a period of the synchronous signal are stored in plural memories based on the synchronous signals detected. The stored plural channel signals are continuously reproduced by successively reading from the memories of channels by switching at synchronous intervals. The signal bandwidth of the channels becomes 1/n of the original video signal by recording and reproducing the video signal by dividing it into plural channels(n channels) in such manner. Therefore, even when the shortest recording wavelength is the same, the linear velocity is reduced by 1/n.
    • 从主视频盘产生视频盘,其中记录有包含周期性发生的同步信号的视频信号,并通过同步信号的周期被划分为多个信道。 多个信道信号分别记录在一组多个磁道上。 在再现视频盘的情况下,分别从多个磁道组再现多个声道信号。 从再现信号中检测同步信号。 基于检测到的同步信号,将同步信号的周期中的再生信道信号存储在多个存储器中。 所存储的多个信道信号通过以同步间隔切换从信道的存储器连续地读出来连续再现。 通过以这种方式将视频信号分成多个信道(n个信道)来记录和再现视频信号,信道的信号带宽变为原始视频信号的1 / n。 因此,即使最短记录波长相同,线速度也减少1 / n。
    • 2. 发明授权
    • Synchronous signal generator for the muse signal
    • 同步信号发生器用于muse信号
    • US5148276A
    • 1992-09-15
    • US620194
    • 1990-11-30
    • Shigeru FurumiyaYoshinari TakemuraHiromu Kitaura
    • Shigeru FurumiyaYoshinari TakemuraHiromu Kitaura
    • H04N5/08H03L7/087H03L7/091H03L7/199H04L7/04H04N5/10H04N7/015
    • H03L7/199H03L7/087H04N5/10H03L7/091
    • A synchronous signal generator for use with the MUSE signal in the MUSE system which is a high definition television systems. A PLL circuit including a phase comparator and a voltage-controlled oscillator and a counter, is used to generate a system clock synchronized with an external clock. A frame synchronizing signal detected through a frame sychronization detection circuit from an inputted digital MUSE signal frame-resets the counter through a window circuit. The frame synchronization is established at an accuracy of a set range of the window circuit. Also, in this case, if the sychronization deviates on a clock by clock basis, a sampling phase error from a phase error computing circuit is monitored by a comparator circuit so that a deviation in the synchronization can be detected. When the synchronization deviates, by horizonally resetting the counter, the clock synchronization can be established. By effecting the three steps noted above, the synchronous signal generation for the digital MUSE signal can be properly achieved. Also, by combining an arrangement noted above with a conventional synchronous signal for an analog MUSE signal, a synchronous signal generator for both a digital MUSE signal and an analog MUSE signal can be provided.
    • 同步信号发生器,用于MUSE系统中的MUSE信号,该系统是高分辨率电视系统。 包括相位比较器和压控振荡器以及计数器的PLL电路用于产生与外部时钟同步的系统时钟。 通过帧同步检测电路从输入的数字MUSE信号帧检测的帧同步信号通过窗口电路复位计数器。 在窗口电路的设定范围的精度下建立帧同步。 此外,在这种情况下,如果同步在时钟上基于时钟偏移,则由比较器电路监视来自相位误差计算电路的采样相位误差,从而可以检测到同步偏差。 当同步偏离时,通过水平重置计数器,可以建立时钟同步。 通过进行上述三个步骤,可以适当地实现数字MUSE信号的同步信号产生。 此外,通过将上述装置与用于模拟MUSE信号的常规同步信号组合,可以提供用于数字MUSE信号和模拟MUSE信号的同步信号发生器。
    • 7. 发明授权
    • Optical disk system
    • 光盘系统
    • US5400315A
    • 1995-03-21
    • US165560
    • 1993-12-13
    • Kenji KoishiYoshinari TakemuraShigeru Furumiya
    • Kenji KoishiYoshinari TakemuraShigeru Furumiya
    • H04N5/85G11B7/00G11B7/004G11B20/10H04N5/92H04N9/79H04N9/82
    • H04N9/8216H04N9/7904
    • An analog-to-digital converter executes analog-to-digital conversion of a first analog video signal at a predetermined sampling frequency "fs". A time base converter converts a time base of an output signal from the analog-to-digital converter at a predetermined time base conversion frequency "ftci". A digital output signal from the time base converter is converted into a corresponding second analog video signal in response to a clock signal of a frequency corresponding to the frequency "ftci". The second analog video signal is converted into an FM video signal recorded on a video region of an optical disk. A binary audio digital signal is converted into a multi-level form digital audio signal. The binary audio digital signal has a data rate corresponding to the frequency "ftci". The multi-level form digital audio signal has a data rate "ftci/n" and 2.sup.n discrete amplitude levels where "n" denotes a predetermined integer. The multi-level form digital audio signal is converted into a corresponding analog audio signal in response to the clock signal of the frequency corresponding to the frequency "ftci". The analog audio signal is converted into an FM audio signal recorded on an audio region of the optical disk. A data signal generator generates a digital data signal at a data rate "ftci/m" where "m" denotes a predetermined integer. The digital data signal is converted into a corresponding analog data signal in response to the clock signal of the frequency corresponding to the frequency "ftci". The analog data signal is converted into an FM data signal recorded on a data region of the optical disk.
    • 模数转换器以预定的采样频率“fs”执行第一模拟视频信号的模数转换。 时基转换器以预定的时基转换频率“ftci”转换来自模数转换器的输出信号的时基。 响应于与频率“ftci”对应的频率的时钟信号,来自时基转换器的数字输出信号被转换成对应的第二模拟视频信号。 第二模拟视频信号被转换成记录在光盘的视频区域上的FM视频信号。 二进制音频数字信号被转换为多电平形式的数字音频信号。 二进制音频数字信号具有对应于频率“ftci”的数据速率。 多级形式数字音频信号具有数据速率“ftci / n”和2n个离散幅度电平,其中“n”表示预定的整数。 响应于对应于频率“ftci”的频率的时钟信号,多级形式的数字音频信号被转换成相应的模拟音频信号。 模拟音频信号被转换成记录在光盘的音频区域上的FM音频信号。 数据信号发生器以数据速率“ftci / m”生成数字数据信号,其中“m”表示预定的整数。 响应于对应于频率“ftci”的频率的时钟信号,将数字数据信号转换成对应的模拟数据信号。 模拟数据信号被转换成记录在光盘的数据区域上的FM数据信号。
    • 8. 发明授权
    • Synchronous clock generator and time-base error corrector
    • 同步时钟发生器和时基误差校正器
    • US5298998A
    • 1994-03-29
    • US982373
    • 1992-11-25
    • Shigeru FurumiyaYoshinari Takemura
    • Shigeru FurumiyaYoshinari Takemura
    • H04L7/033H04N5/06H04N5/932H04N5/945H04N5/956H04N5/04
    • H04N5/932H04N5/945
    • In a clock generator circuit, a zero hold circuit produces from a fixed clock signal a zero hold clock signal which is in phase with an external sync signal. A phase comparator circuit produces phase difference data indicating the phase difference between the external sync signal and an internal sync signal. A counter cleared by the external sync signal counts pulses of the zero hold clock signal to obtain count data. A memory receiving the phase difference data and the count data as its address input produces the internal sync signal when the count data is smaller than the number of pulses in one cycle of the external sync signal having no time-base variations, and a phase control signal determined by the phase difference data and the count data. A phase shifter shifts the phase of the zero hold clock according to the phase control signal to obtain a modified clock signal synchronized with the external sync signal.
    • 在时钟发生器电路中,零保持电路从固定时钟信号产生与外部同步信号同相的零保持时钟信号。 相位比较器电路产生指示外部同步信号和内部同步信号之间的相位差的相位差数据。 由外部同步信号清零的计数器对零保持时钟信号的脉冲进行计数以获得计数数据。 当计数数据小于没有时基偏差的外部同步信号的一个周期中的脉冲数时,接收相位差数据和计数数据作为其地址输入的存储器产生内部同步信号,并且相位控制 由相位差数据和计数数据确定的信号。 移相器根据相位控制信号移位零保持时钟的相位,以获得与外部同步信号同步的修改的时钟信号。