公开(公告)号：US5621467A

公开(公告)日：1997-04-15

申请号：US389524

申请日：1995-02-16

申请人： Max Chien ,  HuiFang Sun ,  Wilson Kwok

发明人： Max Chien ,  HuiFang Sun ,  Wilson Kwok

IPC分类号： H04N5/94 ,  H03M13/00 ,  H04N9/88 ,  H04N19/895 ,  H04N7/68

CPC分类号： H04N19/895

摘要： A video decompression system includes block error concealment means for generating substitute data for lost blocks of pixel data. An interpolator generates both spatially and temporally interpolated or predicted blocks of data for concealing a lost block. Pixel data in the respective blocks of spatially and interpolated data are transformed to coefficients representing frequency spectra. A substitute block of coefficients is assembled from coefficients from both the transformed blocks, according to a predetermined criteria. The substitute block is transformed back to the spatial domain for substitution of lost pixel values.

摘要翻译： 视频解压缩系统包括块错误隐藏装置，用于生成丢失的像素数据块的替代数据。 内插器生成用于隐藏丢失块的空间和时间内插或预测数据块。 空间和内插数据的相应块中的像素数据被变换成表示频谱的系数。 系数的替代块根据预定标准从来自两个变换块的系数组装。 替代块被转换回空间域以替代丢失的像素值。

公开(公告)号：US5471250A

公开(公告)日：1995-11-28

申请号：US357861

申请日：1994-12-16

申请人： Hiroshi Otaki ,  Masahiro Nakajima

发明人： Hiroshi Otaki ,  Masahiro Nakajima

IPC分类号： H04N5/956 ,  H04N5/932 ,  H04N9/88 ,  H04N9/885 ,  H04N9/896 ,  H04N5/94 ,  H04N5/95

CPC分类号： H04N5/932 ,  H04N9/885 ,  H04N9/896

摘要： A digital time base corrector reduces the capacity of a memory to approximately a 1 H of image data while maintains the interleave relationship between a luminance signal and a chrominance signal of a video signal. Polarity data indicating the polarity of a burst signal is generated every 1 H, and a latch circuit is provided for holding and outputting the polarity data during a period of reading image data and polarity data from an image data memory and a sub-carrier phase memory, corresponding to the 1 H in which the polarity data was generated. When dropout occurs in a video signal, the image data and the polarity data are inhibited from being written into the image data memory and the sub-carrier phase memory. When discrepancy is detected between read polarity data and polarity data held in the latch circuit, the color phase of the read image data is inverted.

摘要翻译： 数字时基校正器将存储器的容量减小到大约1 H的图像数据，同时保持视频信号的亮度信号和色度信号之间的交织关系。 每1H产生指示突发信号的极性的极性数据，并且提供锁存电路用于在从图像数据存储器和副载波相位存储器读取图像数据和极性数据的时段期间保持和输出极性数据 ，对应于其中产生极性数据的1H。 当在视频信号中发生压差时，禁止图像数据和极性数据被写入到图像数据存储器和副载波相位存储器中。 当读取极性数据和保持在锁存电路中的极性数据之间检测到差异时，读取的图像数据的颜色相位被反转。

公开(公告)号：US5260800A

公开(公告)日：1993-11-09

申请号：US883066

申请日：1992-05-08

申请人： Albert G. Sturm ,  Kevin Stec ,  David H. Rubenstein

发明人： Albert G. Sturm ,  Kevin Stec ,  David H. Rubenstein

IPC分类号： G11B7/28 ,  G11B20/10 ,  G11B27/022 ,  G11B27/024 ,  G11B27/031 ,  G11B27/032 ,  H04N5/92 ,  H04N5/94 ,  H04N9/79 ,  H04N9/802 ,  H04N9/83 ,  H04N9/835 ,  H04N9/88 ,  H04N9/80

CPC分类号： G11B20/10 ,  G11B27/022 ,  G11B27/031 ,  G11B7/28 ,  H04N5/94 ,  H04N9/79 ,  H04N9/831 ,  G11B2220/20 ,  G11B2220/2587 ,  G11B2220/90 ,  G11B27/024 ,  G11B27/032 ,  H04N5/9206 ,  H04N9/802 ,  H04N9/835 ,  H04N9/88

摘要： A laser video disk master is operated at 2.times. speed for duplicating video information to be recorded in VHS format. Two last disk video players are modified to operate in synchronism in order to multiplex from one to the other in duplicating video programs of length equal to the two recorded disks. The 2.times. frequency NTSC format video output signal is then demodulated, drop out detection is performed, and the digitally-encoded stereo audio information is separated, error corrected, and converted by digital to analog (D/A) conversion to left and right channels of stereo analog information. The left and right channels of audio information are presented simultaneously to an FM modulator for presentation to rotating video heads and to a 2.times. Dolby processor for presentation to linear heads. The demodulated 2.times. video information is converted to digital information by an analog to digital (A/D) converter and then time-base corrected and drop out compensated. New sync and blanking signals in digital form are switched into the digitized video signal, and digital color-under chroma processing and digital luminance noise reduction processing are performed. The 2.times. composite time base corrected and color-under processed video signal is then D/A converted to analog form for 2.times. speed duplication of VHS cassette copies. With suitable buffering, the signal may be presented to a bank of VHS recorders.

摘要翻译： 激光视频磁盘主机以2x速度运行，用于复制要以VHS格式记录的视频信息。 两个最后的磁盘视频播放器被修改为同步操作，以便在复制长度等于两个记录的磁盘的视频节目时从一个复制到另一个。 然后解调2倍频NTSC格式视频输出信号，执行丢失检测，数字编码立体声音频信息被分离，纠错，并通过数模转换（D / A）转换为左右声道 立体声模拟信息。 音频信息的左声道和右声道同时呈现给FM调制器，以呈现给旋转视频头和用于呈现到线性头的2x杜比处理器。 解调的2x视频信息通过模数（A / D）转换器转换为数字信息，然后进行时基校正和退出补偿。 以数字形式将新的同步和消隐信号切换为数字化视频信号，并进行数字彩色色处理和数字亮度降噪处理。 然后将2x复合时基校正和彩色处理视频信号D / A转换为模拟形式，用于速度复制VHS盒式复印件。 通过适当的缓冲，信号可以呈现给一组VHS记录器。

公开(公告)号：US5239421A

公开(公告)日：1993-08-24

申请号：US688284

申请日：1991-04-22

申请人： Masakazu Hamaguchi ,  Takashi Furuhata ,  Hiroaki Takahashi

发明人： Masakazu Hamaguchi ,  Takashi Furuhata ,  Hiroaki Takahashi

IPC分类号： H04N5/7826 ,  H04N5/94 ,  H04N5/956 ,  H04N9/81 ,  H04N9/88 ,  H04N9/896

CPC分类号： H04N5/956 ,  H04N5/94 ,  H04N5/78266 ,  H04N9/81 ,  H04N9/88 ,  H04N9/896

摘要： A method of reproducing video signals from a magnetic recording medium like a magnetic tape for a VTR to obtain high-quality video pictures even when dropouts occur in the medium, which includes the steps of separating synchronizing information from the video signals reproduced from the magnetic recording medium, detecting a dropout duration from the reproduced video signals, generating complete synchronizing information during a whole period of writing the signals in image information memories by compensating lost synchronizing information during the dropout, generating write address signals on the basis of the generated synchronizing information, writing reproduced video signals the memories on the basis of the generated write address signals while no dropout occurs, and leaving unchanged previously written video signals while a dropout occurs. According to an apparatus implementing the above method, reproduced pictures of high quality are obtained without jitters and skews due to dropouts.

摘要翻译： 一种从VTR用磁带等磁记录介质再现视频信号的方法，即使在介质中出现缺陷时也能获得高质量的视频图像，其中包括从与磁记录重现的视频信号分离同步信息的步骤 介质，从再现的视频信号中检测出一个压差持续时间，在通过在丢失期间补偿丢失的同步信息的整个写入信号在图像信息存储器中的整个周期期间产生完整的同步信息，根据生成的同步信息产生写入地址信号， 在不产生压降的情况下，根据所生成的写入地址信号对再现的视频信号进行写入，并且在出现发生缺陷的同时留下未改变的先前写入的视频信号。 根据实现上述方法的设备，获得高质量的再现图像，而不会由于丢失而产生抖动和偏差。

公开(公告)号：US5179450A

公开(公告)日：1993-01-12

申请号：US623067

申请日：1990-12-06

申请人： Toshizumi Ando ,  Hiroyuki Iida

发明人： Toshizumi Ando ,  Hiroyuki Iida

IPC分类号： G11B20/02 ,  H04N5/932 ,  H04N9/79 ,  H04N9/88 ,  H04N9/896

CPC分类号： H04N9/7908 ,  H04N5/932 ,  H04N9/88 ,  H04N9/896

摘要： A video signal processing apparatus and method are provided in which time base errors in the luminance and color signals of a video signal reproduced from a recording medium are compensated. Time base errors in the luminance signal are reduced by storing the luminance signal in a first memory in response to a write clock singal synchronized with the video signal and subsequently reading the luminance signal from the memory in response to a first read clock signal synchronized with a stable clock signal. Time base errors in the color signal are reduced by writing the color signal in a second memory in response to the write clock signal and subsequently reading the color signal from the second memory in response to a second read clock signal synchronized with the stable clock signal such that corresponding portions of the luminance signal and the color signal are read from the first and second memories at different respective times with a predetermined time difference therebetween.

公开(公告)号：US5159462A

公开(公告)日：1992-10-27

申请号：US609118

申请日：1990-10-31

申请人： Hiroto Yasumura ,  Masahide Hirasawa ,  Minoru Noji ,  Susumu Kozuki ,  Koji Takahashi ,  Katsuji Yoshimura ,  Tomohiko Sasatani

发明人： Hiroto Yasumura ,  Masahide Hirasawa ,  Minoru Noji ,  Susumu Kozuki ,  Koji Takahashi ,  Katsuji Yoshimura ,  Tomohiko Sasatani

IPC分类号： H04N5/77 ,  H04N9/79 ,  H04N9/83 ,  H04N9/87 ,  H04N9/88

CPC分类号： H04N9/79 ,  H04N5/772 ,  H04N9/7908 ,  H04N9/83 ,  H04N9/87 ,  H04N9/88 ,  Y10S358/906

摘要： A video signal reproducing apparatus having a video camera part which produces a video signal by picking up an image of an object and is arranged in one unified body at least with a reproducing part which reproduces a video signal from a recording medium is arranged to selectively supply the video signal obtained by picking up the object's image or the reproduced video signal obtained from the recording medium to one and the same signal processing means. The disclosed arrangement not only permits simplification of the apparatus but also enables the apparatus to reproduce a high quality video signal.

摘要翻译： 一种视频信号再现装置，具有通过拾取对象的图像产生视频信号的视频摄像机部分，并且至少与从记录介质再现视频信号的再现部分一起布置在一个统一的主体中，以选择性地提供 通过将从记录介质获得的对象图像或再现视频信号拾取而获得的视频信号到同一个信号处理装置。 所公开的布置不仅允许装置的简化，而且使装置能够再现高质量的视频信号。

公开(公告)号：US5148290A

公开(公告)日：1992-09-15

申请号：US641148

申请日：1991-01-15

申请人： Takayoshi Yamaguchi ,  Masaru Yoshida

发明人： Takayoshi Yamaguchi ,  Masaru Yoshida

IPC分类号： G11B20/06 ,  H04N5/919 ,  H04N9/797 ,  H04N9/81 ,  H04N9/88 ,  H04N9/89

CPC分类号： H04N9/88 ,  H04N5/919 ,  H04N9/797 ,  H04N9/81

摘要： In a VTR for a TCI signal, time-base correction and TCI decode processing are applied to the reproduced TCI signal of each channel and also to the corresponding dropout signals. According to the resulting dropout signal for luminance signal and the dropout signal for chrominance signal, the dropout section of a luminance signal and the dropout section of a chrominance signal are respectively compensated for. As a result, a luminance signal may have the data of the dropout section compensated for with data of a highly correlated luminance signal of 1H before and 1H after the horizontal period where dropout occurs. The dropout compensation circuits can be simplified since the luminance and chrominance signals are processed by separate circuits.

公开(公告)号：US5126835A

公开(公告)日：1992-06-30

申请号：US694236

申请日：1991-05-01

申请人： James Hedley Wilkinson

发明人： James Hedley Wilkinson

IPC分类号： H04N5/94 ,  H04N9/88 ,  H04N9/888 ,  H04N11/10

CPC分类号： H04N9/888

摘要： Dropout is compensated in a video signal that has samples comprising respective different color information components in alternate lines and samples comprising luminance information time multiplexed with the color samples in each line. Adders (78, 82) average first and second sample (S1, S2) positioned one line after and one line before a central reference sample SR to produce a first averaged sample SA1, and third and fourth samples (S3, S4) positioned two lines after and two lines before the sample SR to produce a second averaged sample SA2. Gating means (48 to 60) outputs any one of the sample SR, the averaged samples and the first to fourth samples. An error detector (42) is responsive to error information ER for the sample SR indicating no dropout to cause the sampe SR to be output, and is responsive to the error information ER indicating dropout, and to timing information indicating whether the sample SR comprises color or luminance, to effect dropout compensation by causing another sample to be output in place of the sample SR in accordance with the algorithm set forth below, in which En represents the error information for the (n)th sample, En=0 means that there is no dropout for the (n)th sample, S=Y means that the sample SR comprises luminance, and S=C means that the sample SR comprises color:(1) if S=Y go to (2) or if S=C go to (5);(2) if E1=E2=0 output first averaged sample (SA1);(3) Else if E1=0 output first sample (S1);(4) Else if E2=0 output second sample (S2);(5) Else if E3=E4=0 output second averaged sample (SA2);(6) Else output fourth sample (S4).

摘要翻译： 在具有包括交替行中的各个不同颜色信息分量的样本的视频信号中补偿压差，并且包括与每行中的颜色样本时间复用的亮度信息的样本。 加法器（78,82）平均位于中心参考样​​本SR之前一行之后的第一和第二样本（S1，S2），以产生第一平均样本SA1，并且第三和第四样本（S3，S4）位于两行 在样品SR之前和两行之后产生第二平均样品SA2。 门控装置（48至60）输出样本SR，平均采样和第一至第四采样中的任何一个。 错误检测器（42）响应于指示没有丢弃的样本SR的错误信息ER，以使得输出sampe SR，并且响应于指示丢失的错误信息ER，以及指示样本SR是否包括颜色的定时信息 或亮度，通过根据以下所述的算法使另一个样品代替样品SR而输出另一个样品来实现压差补偿，其中En表示第（n）个样本的误差信息，En = 0表示那里 对于第（n）个样本，S = Y意味着样本SR包括亮度，S = C意味着样本SR包括颜色：（1）如果S = Y转到（2），或者如果S = C（5）; （2）如果E1 = E2 = 0输出第一个平均采样（SA1）; （3）否则E1 = 0输出第一样本（S1）; （4）否则E2 = 0输出第二样本（S2）; （5）否则E3 = E4 = 0输出第二平均采样（SA2）; （6）否则输出第四个样本（S4）。

公开(公告)号：US4943858A

公开(公告)日：1990-07-24

申请号：US314089

申请日：1989-02-23

申请人： Hiromu Kitaura ,  Yuichi Ninomiya ,  Yoshimichi Ohtsuka ,  Yoshinori Izumi

发明人： Hiromu Kitaura ,  Yuichi Ninomiya ,  Yoshimichi Ohtsuka ,  Yoshinori Izumi

IPC分类号： H04N7/015 ,  H04N9/88

CPC分类号： H04N9/88 ,  H04N7/0152

摘要： A recording and reproducing apparatus is disclosed in whic

摘要翻译： 公开了一种记录和再现装置

公开(公告)号：US4737862A

公开(公告)日：1988-04-12

申请号：US554106

申请日：1983-11-21

申请人： Takashi Koga

发明人： Takashi Koga

IPC分类号： H04N9/84 ,  H04N9/79 ,  H04N9/83 ,  H04N9/88 ,  H04N9/491

CPC分类号： H04N9/7908 ,  H04N9/79 ,  H04N9/83 ,  H04N9/88

摘要： In a record mode, a record video signal applied to an input terminal is separated into a luminance signal and a color signal by a comb filter made up of a 1H delay line, an adder circuit and a subtraction circuit. In a playback mode, the reproduced luminance signal and color signal are added together in an adder circuit, thereby to form a video signal. This video signal is applied to the comb filter through switches and then is separated into a luminance signal and a color signal.

摘要翻译： 在记录模式中，通过由1H延迟线，加法器电路和减法电路组成的梳状滤波器将施加到输入端的记录视频信号分离成亮度信号和彩色信号。 在再现模式中，再现的亮度信号和彩色信号在加法器电路中相加在一起形成视频信号。 该视频信号通过开关施加到梳状滤波器，然后被分离为亮度信号和颜色信号。