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    • 2. 发明授权
    • Digital video signal recording system and reproducing apparatus
    • 数字视频信号记录系统和再现装置
    • US4520401A
    • 1985-05-28
    • US485054
    • 1983-04-14
    • Nobuaki TakahashiSeiichi TakashimaTakeshi ShibamotoFujio SuzukiKoji TanakaMitsuo KuboHiroyuki SugiyamaYoshiaki AmanoMitsuru Kikuchi
    • Nobuaki TakahashiSeiichi TakashimaTakeshi ShibamotoFujio SuzukiKoji TanakaMitsuo KuboHiroyuki SugiyamaYoshiaki AmanoMitsuru Kikuchi
    • H04N9/79H04N9/804H04N9/877H04N5/76
    • H04N9/877H04N9/7925H04N9/804G11B2220/20
    • A digital video signal recording system and reproducing apparatus comprise a circuit for independently subjecting a luminance signal and two kinds of color difference signals of a color picture information to digital pulse modulation, to produce a digital luminance signal and two kinds of digital color difference signals, a circuit for dividing the digital luminance signal and the two kinds of digital color difference signals into picture element data groups, in terms of specific number of rows or columns which are adjacent on a screen, and adding a header signal at least comprising a synchronizing signal, a picture mode identification code, and a picture information quantity identification code to a beginning position of each of the divided picture element data groups comprising the digital luminance signal and the two kinds of digital color difference signals, to produce a digital video signal having a signal format in which the digital luminance, the two kinds of digital color difference signals, and the header signal are time-sequentially multiplexed, a circuit for recording the digital video signal onto a recording medium, a circuit for writing each of the divided picture element data groups picked up and reproduced from the recording medium into a memory circuit according to codes within the header signal, and a circuit for producing an analog video signal in accordance with a standard television system from picture element data read out from the memory circuit.
    • 数字视频信号记录系统和再现装置包括用于独立地对亮度信号和彩色图像信息的两种色差信号进行数字脉冲调制的电路,以产生数字亮度信号和两种数字色差信号, 根据在屏幕上相邻的特定数量的行或列,将数字亮度信号和两种数字色差信号分割为像素数据组的电路,以及添加至少包括同步信号的标题信号 ,图像模式识别码,以及图像信息量识别码,包括数字亮度信号和两种数字色差信号的每个分割图像元素数据组的开始位置,以产生具有 信号格式其中数字亮度,两种数字色差 并且头信号被时间顺序复用,用于将数字视频信号记录到记录介质上的电路,用于将从记录介质拾取和再现的每个划分的图像元素数据组写入存储电路的电路 根据标题信号中的代码,以及根据从存储器电路读出的图像元素数据根据标准电视系统产生模拟视频信号的电路。
    • 3. 发明授权
    • Digital video signal reproducing apparatus
    • 数字视频信号再现装置
    • US4613908A
    • 1986-09-23
    • US523770
    • 1983-08-16
    • Nobuaki TakahashiSeiichi TakashimaTakeshi ShibamotoKoji TanakaFujio SuzukiMitsuo KuboMitsuru KikuchiHiroyuki SugiyamaYoshiaki Amano
    • Nobuaki TakahashiSeiichi TakashimaTakeshi ShibamotoKoji TanakaFujio SuzukiMitsuo KuboMitsuru KikuchiHiroyuki SugiyamaYoshiaki Amano
    • H04N9/79H04N9/804H04N5/76
    • H04N9/804H04N9/7925G11B2220/20
    • A digital video signal reproducing apparatus comprises a reproducing circuit for reproducing a digital video signal from a recording medium, where the recording medium is time-sequentially recorded with the digital video signal having a signal format in which a header signal is added to each of divided picture element data groups which are obtained by dividing a picture element data group in terms of a predetermined unit, the picture element data group is obtained by subjecting an analog video signal to a digital pulse modulation at a sampling frequency such that a product of a number of picture element data in one scanning line and an effective number of scanning lines in one picture of a standard television system is exceedingly close to 2.sup.18 but less than 2.sup.18, and the header signal at least comprises a synchronizing signal and a picture mode identification code, a header signal reproducing circuit for discriminating the header signal within the digital video signal reproduced by the reproducing circuit and reproducing the header signal, two memory circuits into which the picture element data group within said reproduced digital video signal is written and from which a stored picture element data group is read out, a circuit for controlling write-in and read-out with respect to the two memory circuits according to a code in the reproduced header signal, and a circuit for producing an analog video signal in accordance with a standard television system from the picture element data read out from the two memory circuits.
    • 数字视频信号再现装置包括一个再现电路,用于从记录介质再现数字视频信号,其中记录介质被时间顺序地记录有数字视频信号,该数字视频信号具有一个信号格式,其中标题信号被添加到每个划分的信号 通过以预定单位划分图像元素数据组而获得的图像元素数据组,通过使模拟视频信号以采样频率进行数字脉冲调制获得,使得数字 一个扫描线中的图像元素数据和标准电视系统的一个图像中的有效数量的扫描线非常接近218但小于218,并且标题信号至少包括同步信号和图像模式识别码, 一个标题信号再现电路,用于鉴别该数字视频信号内的标题信号 再现电路并再现标题信号,写入所述再现的数字视频信号内的图像元素数据组并读出存储的图像元素数据组的两个存储电路,用于控制写入和读出的电路 相对于根据再现的标题信号中的代码的两个存储器电路,以及根据从两个存储器电路读出的像素数据根据标准电视系统产生模拟视频信号的电路。
    • 4. 发明授权
    • Digital signal recording system and reproducing apparatus
    • 数字信号记录系统和再现装置
    • US4513327A
    • 1985-04-23
    • US478455
    • 1983-03-24
    • Nobuaki TakahashiSeiichi TakashimaTakeshi ShibamotoFujio SuzukiKoji Tanaka
    • Nobuaki TakahashiSeiichi TakashimaTakeshi ShibamotoFujio SuzukiKoji Tanaka
    • H04N9/804H04N5/92
    • H04N9/804
    • A digital signal recording system and a reproducing apparatus for reproducing signals recorded according to this recording system comprise a circuit for alternately transmitting a first digital luminance signal and a first two kinds of digital color difference signals obtained by subjecting a color picture information signal to digital pulse modulation, in terms of information of one or a plurality of scanning lines, and producing a first digital video signal having a signal format wherein signal components of two sampling points of the first digital luminance signal are arranged within the same word and signal components of the same sampling point on a picture of the first two kinds of digital color difference signals are arranged within the same word; a circuit for time-sequentially multiplexing the first digital video signal and the digital audio signals obtained by subjecting audio information signal to be recorded to digital pulse modulation, in terms of words, and recording the time-sequentially multiplexed signal onto the same one track on a recording medium; a decoder for demodulating and reproducing analog audio signals from a signal picked up and reproduced from the recording medium; and a circuit for producing an analog video signal in accordance with a standard television system, from the output first digital video signal of the decoder.
    • 用于再现根据该记录系统记录的信号的数字信号记录系统和再现装置包括用于交替发送第一数字亮度信号和通过使彩色图像信息信号经受数字脉冲而获得的前两种数字色差信号的电路 根据一条或多条扫描线的信息进行调制,并产生具有信号格式的第一数字视频信号,其中第一数字亮度信号的两个采样点的信号分量被布置在相同的字和信号分量 前两种数字色差信号的图像上的相同采样点排列在同一个字内; 用于对第一数字视频信号进行时间顺序多路复用的电路和通过使音频信息信号被记录在数字脉冲调制方面获得的数字音频信号,并将时间顺序复用的信号记录在相同的一个磁道上 记录介质; 解码器,用于从记录介质拾取和再现的信号中解调和再现模拟音频信号; 以及根据解码器的输出第一数字视频信号产生根据标准电视系统的模拟视频信号的电路。
    • 6. 发明授权
    • Apparatus for reproducing a multichannel record disc
    • 用于再现多声道记录盘的装置
    • US4152550A
    • 1979-05-01
    • US843856
    • 1977-10-20
    • Nobuaki TakahashiFujio SuzukiMasao KasugaNorio Shibata
    • Nobuaki TakahashiFujio SuzukiMasao KasugaNorio Shibata
    • G11B3/00H04S3/00G11B3/74H03D3/00
    • G11B3/00H04S3/006
    • A multichannel record disc reproducing apparatus has a pickup cartridge for picking up signals from a multichannel record disc. A multiplexed signal was recorded on the disc by first multiplexing direct wave signals and angle-modulated wave signals which are recorded on opposite groove walls. Filters separate the picked up multiplexed signal into the direct wave signal and the angle-modulated wave signal. A demodulates circuit for demodulating the angle-modulated wave signal, thus separated. A matrix circuit separates the signals to obtain a plurality of separate channels from the direct wave signals and the demodulated signals. A circuit in a stage preceding the demodulator removes substantially all components of the higher harmonics at the carrier wave center frequency, which carrier was used for angle-modulating the original signal.
    • 多通道记录盘再现装置具有用于从多声道记录盘拾取信号的拾取盒。 通过首先复用记录在相对的槽壁上的直接波信号和角度调制波信号,将多路复用的信号记录在盘上。 滤波器将拾取的复用信号分离成直接波信号和角度调制波信号。 解调电路,用于解调被分离的角度调制波信号。 矩阵电路分离信号以从直接波信号和解调信号中获得多个分离的信道。 在解调器之前的阶段中的电路基本上去除了载波中心频率处的高次谐波的所有分量,该载波用于对原始信号进行角度调制。
    • 8. 发明授权
    • Multichannel record disc reproducing apparatus
    • 多通道记录盘再现装置
    • US4186281A
    • 1980-01-29
    • US843863
    • 1977-10-20
    • Masao KasugaNobuaki TakahashiFujio SuzukiYoshiki Iwasaki
    • Masao KasugaNobuaki TakahashiFujio SuzukiYoshiki Iwasaki
    • H04S3/00G11B3/00H03D3/00
    • H04S3/006
    • A multichannel record disc reproducing apparatus comprises a first phase locked loop circuit including a phase comparator and a voltage controlled oscillator for demodulating an angle-modulated wave signal. The modulated signal is separated from a composite signal picked up from a multichannel record disc on which a multiplexed direct wave signal and an angle-modulated wave signal are recorded. The output of the first phase locked loop is a demodulated signal. A second phase locked loop circuit includes a phase comparator and a voltage controlled oscillator, supplied with the separated angle-modulated wave signal and having a lock range of a width which covers and is wider than the maximum lock range width of the first phase locked loop circuit. A synchronous detector compares the phases of the angle-modulated wave signal and the output signal of voltage controlled oscillator of the second phase locked loop. The synchronous detector operates when the phase difference of the two signals deviates sufficiently from a predetermined phase difference. Means are provided for reducing or removing noise components which are developed in the demodulated signal in accordance with the output of the synchronous detector. This noise reduction or removal is provided in the first phase locked loop circuit and/or in a channel for transmitting the demodulated signal.
    • 多通道记录盘重放装置包括第一锁相环电路,其包括用于解调角度调制波信号的相位比较器和压控振荡器。 调制信号与从其上记录有多路复用直接波信号和角度调制波信号的多通道记录盘拾取的复合信号分离。 第一锁相环的输出是解调信号。 第二锁相环电路包括相位比较器和压控振荡器,被提供有分离的角度调制波信号并且具有覆盖并且比第一锁相环的最大锁定范围宽度宽的宽度的锁定范围 电路。 同步检波器将角度调制波信号的相位与第二锁相环的压控振荡器的输出信号进行比较。 当两个信号的相位差从预定的相位差充分偏离时,同步检测器工作。 提供了用于根据同步检测器的输出减少或去除在解调信号中产生的噪声分量的装置。 在第一锁相环电路和/或用于发送解调信号的信道中提供该噪声降低或去除。