-
1.发明授权
公开(公告)号：US5418620A
公开(公告)日：1995-05-23
申请号：US983758
申请日：1992-12-01
CPC分类号： H04N9/7925 , H04N19/51 , H04N5/919 , H04N5/9264
摘要： When a standard TV signal of digital format is a first video signal and another digitized TV signal having a bandwidth wider than that of the first video signal is a second video signal, every two frames of the second video signal are calculated to produce a pixel value sum of the two frames and a pixel value difference between the same and either a resultant interframe calculated output or the first video signal is compressed through two-dimensional orthogonal transformation for ease of storage.
摘要翻译： 当数字格式的标准TV信号是第一视频信号，并且具有比第一视频信号宽的带宽的另一数字化TV信号是第二视频信号时，计算第二视频信号的每两帧以产生像素值 通过二维正交变换来压缩两帧的和，并且通过二维正交变换来压缩相位和所得到的帧间计算输出或第一视频信号之间的像素值差，便于存储。
-
公开(公告)号：US5367334A
公开(公告)日：1994-11-22
申请号：US882927
申请日：1992-05-14
CPC分类号： H04N7/0122 , H04N19/30 , H04N19/59 , H04N19/60 , H04N7/015 , H04N7/0806
摘要： An encoding and decoding apparatus for a video signal and a high-definition television signal is disclosed. For the picture A having the horizontal to vertical screen frame ratio of 4:3, the picture B having the horizontal to vertical screen frame ratio of 16:9 and the picture C having the horizontal to vertical screen frame ratio of 16:9 and having a larger number of vertical pixels than that of the picture A and picture B, the apparatus limits the band of the picture C to obtain the picture D having the same numbers of horizontal and vertical pixels respectively as those of the picture B, and high-efficiency encodes the picture A, picture B or picture D in the same method. The apparatus obtains the additional picture E which is a difference between the picture D and the picture C, or a difference between the picture D' which is a result of decoding a signal that has been obtained by high-efficiency encoding the picture D and the picture C, and then high-efficiency encodes the additional picture E obtained.
摘要翻译： 公开了一种用于视频信号和高清晰度电视信号的编码和解码装置。 对于水平至垂直屏幕帧比为4：3的图像A，图像B的水平垂直屏幕帧比为16:9，图像C的水平垂直屏幕帧比为16:9，并具有 垂直像素数量大于图像A和图像B的垂直像素数量，该装置限制图像C的频带以获得具有与图像B相同数量的水平和垂直像素数量的图像D， 以相同的方法对图像A，图像B或图像D进行高效编码。 该装置获得作为图像D和图像C之间的差的附加图像E，或作为通过对图像D进行高效编码获得的信号的解码结果的图像D'与 图片C，然后对所获得的附加图片E进行高效编码。
-
3.发明授权Digital signal magnetic recording/reproducing apparatus using multi-level QAM modulation and maximum likelihood decoding 失效使用多级QAM调制和最大似然解码的数字信号磁记录/再现装置
公开(公告)号：US5095392A
公开(公告)日：1992-03-10
申请号：US302325
申请日：1989-01-27
CPC分类号： H03M13/41 , G11B20/1496 , G11B20/1809 , G11B20/1833 , G11B5/09 , H03M13/25 , H03M13/39 , H03M5/20 , H04L27/3438 , H04N5/926
摘要： A digital signal magnetic recording/reproducing apparatus converts a digital signal into multi-value digital signals and performs recording/reproducing of a multi-value quadrature amplitude-modulated signal. By using the multi-value quadrature amplitude modulation, it is possible to remove the DC component in the recording signal and improve the utilization efficiency of the recording frequency band. Further, using a system to memorize the frequency characteristic of the magnetic recording/reproducing unit and effect Viterbi decoding regarding the intersymbol interference caused by the frequency as a convolutional coding, it is possible to detect the level without necessitating frequency equalization. Accordingly, there arises no deterioration of the S/N ratio by frequency equalization. Furthermore, by providing an encoder for error control coding by increasing the number of multi-values and a corresponding decoder, the error rate can be improved against the deterioration of the S/N ratio. Further, by bias recording the multi-value quadrature amplitude modulated signal, non-linearity of the electromagnetic conversion system is relaxed, and deterioration of the S/N ratio by distortion is improved.
摘要翻译： 数字信号磁记录/再现装置将数字信号转换为多值数字信号，并执行多值正交幅度调制信号的记录/再现。 通过使用多值正交幅度调制，可以去除记录信号中的DC分量并提高记录频带的利用效率。 此外，使用系统来存储磁记录/再现单元的频率特性，并且将由频率引起的码间干扰作为卷积编码进行维特比解码，可以在不需要频率均衡的情况下检测电平。 因此，通过频率均衡不会导致S / N比的恶化。 此外，通过提供用于通过增加多值的数量的差错控制编码的编码器和相应的解码器，可以相对于S / N比的劣化来提高错误率。 此外，通过偏置记录多值正交幅度调制信号，电磁转换系统的非线性松弛，并且通过失真降低S / N比。
-
公开(公告)号：US5062007A
公开(公告)日：1991-10-29
申请号：US450997
申请日：1989-12-15
申请人： Etsuto Nakatsu , Hiroaki Shimazaki , Toyohiko Matsuta , Masafumi Shimotashiro , Masaaki Kobayashi
发明人： Etsuto Nakatsu , Hiroaki Shimazaki , Toyohiko Matsuta , Masafumi Shimotashiro , Masaaki Kobayashi
CPC分类号： G11B20/10
摘要： A digital signal magnetic recording/reproducing apparatus converts a digital signal into a multi-value digital signal, followed by recording/reproducing the quadrature biphase modulated multi-value quadrature amplitude modulated signal. By using a multi-value quadrature amplitude modulation, a direct current component in the recorded signal can be eliminated, and the utilization efficiency of the recording frequency band of the digital signal magnetic recording/reproducing apparatus can be improved. Also, with respect to the amplitude non-linear characteristic which occurs in the magnetic recording/reproducing process, by providing a compensating circuit during the mapping before recording or after reproducing and demodulating, the deterioration of the S/N ratio of the reproduced and demodulated signal can be reduced to decrease the errors in the decoded data. Furthermore by bias-recording the multi-value quadrature amplitude modulation signal, the non-linearity of the electromagnetic conversion system is alleviated to decrease the deterioration of the S/N ratio due to distortion, thereby making the application of the modulation scheme more reliable.
摘要翻译： 数字信号磁记录/再现装置将数字信号转换为多值数字信号，随后记录/再现正交双相调制多值正交幅度调制信号。 通过使用多值正交幅度调制，可以消除记录信号中的直流分量，并且可以提高数字信号磁记录/再现装置的记录频带的利用效率。 此外，关于在磁记录/再现处理中发生的振幅非线性特性，通过在记录之前或再现和解调之后的映射期间提供补偿电路，再现和解调的S / N比的恶化 可以减少信号以减少解码数据中的误差。 此外，通过对多值正交幅度调制信号进行偏置记录，可以减轻电磁转换系统的非线性，以减少由于失真引起的S / N比的恶化，从而使得调制方案的应用更可靠。
-
公开(公告)号：US5260839A
公开(公告)日：1993-11-09
申请号：US670580
申请日：1991-03-18
CPC分类号： H04N9/896
摘要： An input video signal is converted into a digital signal by a clock of a predetermined time interval. Of the time base errors included in the above signal, time base errors of the clock unit are corrected by resetting the write address of the memory, and time base errors of less than the clock unit and velocity errors are corrected by an interpolation filter provided at a later stage of the memory. By the above processing, it is possible to correct time base errors by only a clock of a predetermined interval and it is also possible to improve interface characteristics with other digital processing sections.
-
公开(公告)号：US5119243A
公开(公告)日：1992-06-02
申请号：US452380
申请日：1989-12-19
申请人： Hiroaki Shimazaki , Toyohiko Matsuta , Etsuto Nakatsu , Masafumi Shimotashiro , Masaaki Kobayashi
发明人： Hiroaki Shimazaki , Toyohiko Matsuta , Etsuto Nakatsu , Masafumi Shimotashiro , Masaaki Kobayashi
CPC分类号： G11B20/10222 , G11B20/10009 , G11B20/1403 , G11B20/1496 , G11B5/09 , H03M5/20
摘要： A digital signal magnetic recording/reproducing apparatus modulates a digital signal with a carrier and performs recording/reproducing of the modulated signal. The carrier frequency is made equal to the clock frequency multiplied by a factor (N/M), where N and M are integers. The carrier and clock are reproduced using only one phase locked loop. When the carrier-modulated signal is recorded/reproduced using a magnetic recording medium, the phase of the modulated signal is shifted relative to the phase of the carrier. Shifting the clock phase before using the clock for decoding the demodulated signal prevents a degradation of error rate. By periodically inserting a clock phase reference signal in the recording signal, accuracy of adjustment of clock phase is improved.
摘要翻译： 数字信号磁记录/再现装置用载波调制数字信号并执行调制信号的记录/再现。 载波频率等于时钟频率乘以因子（N / M），其中N和M是整数。 载波和时钟仅使用一个锁相环进行复制。 当使用磁记录介质记录/再现载波调制信号时，调制信号的相位相对于载波的相位移位。 在使用时钟解码解调信号之前切换时钟相位可防止错误率的降低。 通过在记录信号中周期性地插入时钟相位参考信号，提高了时钟相位的调整精度。
-
公开(公告)号：US4979052A
公开(公告)日：1990-12-18
申请号：US251094
申请日：1988-09-29
摘要： A digital signal magnetic recording/reproducing apparatus converts a digital signal into a multi-value quadrature amplitude modulated signal, and records and reproduces the multi-value quadrature amplitude modulated signal. By using the multi-value quadrture amplitude modulation, any DC component in the recording signal is removed and utilization efficiency of the recording frequency band can be improved. By bias recording of the multi-value quadrature amplitude modulated signal, non-linearity of the electromagnetic of conversion system is reduced, and deterioration of SN ratio due to distortion is improved.
摘要翻译： 数字信号磁记录/再现装置将数字信号转换为多值正交幅度调制信号，并记录和再现多值正交幅度调制信号。 通过使用多值二次振幅调制，去除记录信号中的任何DC分量，并且可以提高记录频带的利用效率。 通过多值正交幅度调制信号的偏置记录，转换系统的电磁场的非线性减小，并且由于失真引起的SN比的恶化得到改善。
-
8.发明申请Video signal processing apparatus video signal processing method program and recording medium 审中-公开视频信号处理装置视频信号处理方法程序和记录介质公开(公告)号：US20050069297A1
公开(公告)日：2005-03-31
申请号：US10493770
申请日：2002-10-24
IPC分类号： H04N5/92 , G11B20/00 , G11B20/10 , H03M7/30 , H04N5/765 , H04N5/775 , H04N9/79 , H04N5/76 , H04N5/225
CPC分类号： G11B20/00007 , H03M7/30 , H04N5/765 , H04N5/775 , H04N9/7921
摘要： A first moving image information volume compression encoder which compression-encodes a video signal from a camera part as a moving image, a second still image information volume compression encoder which compression-encodes the input video signal as a still image, and recording means which records, in memory means, both a first compression signal obtained by the first compression encoder and a second compression signal obtained by the second compression encoder. The compression encoders shoot based on shutters respectively which are independent of each other.
摘要翻译： 将来自摄像机部分的视频信号压缩编码为运动图像的第一运动图像信息量压缩编码器，作为静止图像对输入视频信号进行压缩编码的第二静止图像信息量压缩编码器，以及记录装置 在存储器装置中，由第一压缩编码器获得的第一压缩信号和由第二压缩编码器获得的第二压缩信号。 压缩编码器分别基于彼此独立的百叶窗拍摄。
-
公开(公告)号：US5781690A
公开(公告)日：1998-07-14
申请号：US794407
申请日：1997-02-03
CPC分类号： H04N21/236 , H04N21/434 , H04N5/9264 , H04N9/8042 , H04N5/78266 , H04N5/783 , H04N5/9262 , H04N5/945
摘要： In the video signal recording apparatus of the present invention, when recording video signals of a plurality of frames after highly efficiently coding the same, video signals of the first frame are coded within the frame and divided into compression blocks each of which block is recorded to a corresponding recording block at a fixed position.
摘要翻译： 在本发明的视频信号记录装置中，当在高效编码该多个帧之后记录多个帧的视频信号时，第一帧的视频信号被编码在帧内并被划分成每个被记录块的压缩块 相应的记录块在固定位置。
-
10.发明授权
公开(公告)号：US5124861A
公开(公告)日：1992-06-23
申请号：US329720
申请日：1989-03-28
申请人： Masafumi Shimotashiro , Toyohiko Matsuta , Masaaki Kobayashi , Etsuto Nakatsu , Hiroaki Shimazaki
发明人： Masafumi Shimotashiro , Toyohiko Matsuta , Masaaki Kobayashi , Etsuto Nakatsu , Hiroaki Shimazaki
CPC分类号： H04L27/362 , G11B20/10 , G11B20/14 , H04L27/3836 , H04N5/926 , H04N5/935 , H04N9/8722
摘要： A digital signal magnetic recording and playback apparatus which is applicable to digital video signals, utilizes quadrature amplitude modulation to produce a recording signal from a digital input signal with a carrier frequency being employed which is less than or equal to than the frequency of a recording system clock signal that is synchronized with the successive data values of the digital input signal. Carrier bursts are periodically inserted into the recording signal with a fixed period, through data inserted by a burst data insertion circuit and the carrier and clock signal are arranged to periodically coincide in phase, with the aforementioned period. The carrier frequency is made equal to the clock frequency multiplied by a factor (n/m), where n and m are integers and n
-
-
-
-
-
-
-
-
-
搜索结果
12 条记录 (耗时 0.014 秒)
