-
1.发明授权Digital signal recording and/or reproducing apparatus that evenly distributes field data across tracks 失效数字信号记录和/或再现装置，其在轨道上均匀地分配场数据
公开(公告)号：US5506687A
公开(公告)日：1996-04-09
申请号：US286386
申请日：1994-08-04
申请人： Clive H. Gillard , James H. Wilkinson , Michael J. Ludgate , Jonathan M. Soloff , Rajan Bhandari , Terence R. Hurley
发明人： Clive H. Gillard , James H. Wilkinson , Michael J. Ludgate , Jonathan M. Soloff , Rajan Bhandari , Terence R. Hurley
IPC分类号： G11B20/12 , B82B1/00 , H04N5/7826 , H04N5/92 , H04N5/926 , H04N7/24 , H04N9/797 , H04N9/80 , H04N9/804 , H04N9/808 , H04N9/88 , H04N9/888 , H04N9/79 , G11B5/02
CPC分类号： H04N5/926 , H04N5/78266 , H04N9/7973 , H04N9/8042 , H04N9/888 , H04N2009/8084
摘要： A digital video tape recording/playback system having a plurality of recording heads (A, B, C, D) on a rotating head mechanism 94 for recording slanting tracks 108 which extend diagonally across a tape 82 provides processing of video signals in a plurality of data processing channels with selective connection of the data processing channels to the recording heads such that data from a plurality of data processing channels are stored in respective portions of a slanting track (A+/A-; B+/B-; C+/C-; D+/D-). The data in each data processing channel and recorded in each track portion is sampled with a substantially even distribution over a field of video signals to provide for effective concealment of recording/playback errors. Preferably, two data processing channels are recorded on each track, the respective portions being located in upper and lower portions of the tape, respectively.
摘要翻译： 一种在旋转磁头机构94上具有多个记录头（A，B，C，D）的数字录像带记录/重放系统，用于记录沿着磁带82斜对角延伸的倾斜磁道108， 数据处理通道，数据处理通道选择性地连接到记录头，使得来自多个数据处理通道的数据被存储在倾斜磁道的相应部分（A + / A-; B + / B-; C + / C-; D + / D-）。 每个数据处理通道中记录在每个磁道部分中的数据在视频信号的场上以基本均匀的分布进行采样，以提供有效的隐藏记录/重放错误。 优选地，在每个轨道上记录两个数据处理通道，各个部分分别位于磁带的上部和下部。
-
公开(公告)号：US5268905A
公开(公告)日：1993-12-07
申请号：US885863
申请日：1992-05-20
CPC分类号： H03H17/0664 , H03H17/0266
摘要： A sub-band filter system in which the frequency separated data is multiplexed together at the output of each filter stage. The stream of multiplexed data produced can have a block-by-block format or a sample-by-sample format. In the latter case, the filtering can be effected by a finite impulse response filter with switchable tap coefficients for effecting both decimation and high and low pass filtering.
摘要翻译： 频带分离数据在每个滤波器级的输出端被多路复用的子带滤波器系统。 所生成的复用数据流可以具有逐块格式或逐个样本格式。 在后一种情况下，可以通过具有可切换抽头系数的有限脉冲响应滤波器来实现滤波，以实现抽取和高通和低通滤波。
-
公开(公告)号：US5384869A
公开(公告)日：1995-01-24
申请号：US957159
申请日：1992-10-07
CPC分类号： G06F17/175 , H03H17/0202 , H04N19/122 , H04N19/186 , H04N19/635
摘要： Image processing apparatus is described for filtering a digital representation of a raster scanned image into a plurality of sub-bands in the two-dimensional spatial frequency domain, the resolution of the raster scanned image in a first direction (usually the horizontal direction) being greater than the resolution of the raster scanned image in a second direction (usually the vertical direction). The image processing apparatus has a decimation filter means comprising a number of multi-tap digital decimation filters for spatial filtering in the first and second directions. The mean of the filter lengths of the filters used for filtering in the first direction is greater than that of the filters used for filtering in the second direction. Complementary interpolation apparatus for reconstructing the image from the plurality of sub-bands is also described.
摘要翻译： 描述了图像处理装置，用于将光栅扫描图像的数字表示滤波成二维空间频域中的多个子带，光栅扫描图像在第一方向（通常为水平方向）上的分辨率更大 比在第二方向（通常是垂直方向）的光栅扫描图像的分辨率。 图像处理装置具有抽取滤波器装置，其包括多个用于在第一和第二方向上进行空间滤波的多抽头数字抽取滤波器。 用于在第一方向上过滤的滤波器的滤波器长度的平均值大于用于在第二方向上进行滤波的滤波器的滤波器长度的平均值。 还描述了用于从多个子带重建图像的互补插值装置。
-
公开(公告)号：US5329360A
公开(公告)日：1994-07-12
申请号：US9669
申请日：1993-01-27
CPC分类号： H04N9/8042 , H04N9/8047 , H04N9/87 , H04N5/783
摘要： Image data multiplexing apparatus for multiplexing digital luminance and chrominance data of a representation of an image into multiplexed data blocks of a predetermined length, along with a corresponding demultiplexing apparatus, is described. Each of the multiplexed data blocks comprises a luminance data section comprising luminance data from a portion of the representation, a chrominance data section comprising chrominance data from the portion of the representation, a portion address indicative of the position in the representation of the portion, and a block offset pointer indicative of the position in the multiplexed data block of the boundary between the luminance data section and the chrominance data section.
摘要翻译： 描述了用于将图像的表示的数字亮度和色度数据与预定长度的多路复用数据块一起并入相应的解复用装置的图像数据多路复用装置。 每个复用数据块包括亮度数据部分，其包括来自该部分表示的亮度数据，色度数据部分包括来自该部分表示的色度数据，指示该部分的表示中的位置的部分地址，以及 指示亮度数据部分和色度数据部分之间的边界的复用数据块中的位置的块偏移指针。
-
公开(公告)号：US4638380A
公开(公告)日：1987-01-20
申请号：US608516
申请日：1984-05-09
IPC分类号： G11B5/09 , G11B20/18 , H04N5/91 , H04N5/92 , H04N9/797 , H04N9/804 , H04N9/888 , G11B5/02 , H04N5/78
CPC分类号： G11B20/1876 , G11B20/18 , H04N9/7973 , H04N9/804 , H04N9/888
摘要： Digital video tape recorder apparatus comprises a recording head assembly having 2n heads, where n is an integer, preferably one, two or three, a demultiplexer for demultiplexing the video samples of an incoming digital television signal sample-by-sample, into 2n channels for supply to the 2n recording heads, and a switching arrangement for switching the connections between the channels and the heads line-by-line and also possibly field-by-field or frame-by-frame of the television signal.
摘要翻译： 数字录像机包括具有2n个头的记录头组件，其中n是一个整数，优选一个，两个或三个，用于将输入的数字电视信号逐个采样的视频样本分解成2n个通道的解复用器，用于 提供给2n个记录头，以及切换装置，用于逐行切换并且也可能逐场或逐帧地切换电视信号的连接。
-
6.发明授权Digital data apparatus for providing spatial multiplexing and demultiplexing of compressed data to be recorded and reproduced 失效用于提供待记录和再现的压缩数据的空间复用和解复用的数字数据装置
公开(公告)号：US5384670A
公开(公告)日：1995-01-24
申请号：US55256
申请日：1993-05-03
IPC分类号： G11B20/12 , G11B5/008 , G11B20/10 , G11B20/18 , H04N5/7826 , H04N5/92 , H04N5/926 , H04N5/945 , G11B5/09 , G11B15/14 , H04N5/76
CPC分类号： H04N5/945 , G11B20/10527 , G11B5/0086 , H04N5/926 , H04N5/9268
摘要： Spatial demultiplexing of data (e.g. video data) is employed in a digital recorder comprising four heads (A, B, C, D) organized as 2 groups (A/C; B/D) each of 2 heads, whereby a field of data comprising a plurality of lines is spatially demultiplexed into i.times.4 data processing channels such that each data processing channel receives a different set of pixels including alternating pixels on every fourth line. The technique finds particular application to the recording of video data in compressed form as the distribution of the pixels to the data processing channels enables efficient compression to be achieved. The video data can be decorrelated before compression. The spatial demultiplexing is then performed on the decorrelated data.
摘要翻译： 在数字记录器中采用数据（例如，视频数据）的空间解复用器，该数字记录器包括由2个磁头组成的两组（A / C; B / D）组成的四个磁头（A，B，C，D） 包括多行被空间解复用为ix4数据处理通道，使得每个数据处理通道在每四行上接收包括交替像素的不同像素集合。 该技术特别适用于以压缩形式记录视频数据，因为像素到数据处理通道的分布使得能够实现有效的压缩。 视频数据在压缩之前可以去相关。 然后对解相关数据执行空间解复用。
-
7.发明授权Method apparatus and method for reproducing a frequency separated video signal stored on a recording medium 失效用于再现存储在记录介质上的频率分离视频信号的方法装置和方法
公开(公告)号：US5337194A
公开(公告)日：1994-08-09
申请号：US809264
申请日：1991-12-17
IPC分类号： G06T9/00 , G11B5/008 , G11B15/18 , G11B20/00 , G11B20/10 , G11B20/18 , H04N5/7826 , H04N5/783 , H04N5/91 , H04N5/92 , H04N5/926 , H04N7/26 , H04N7/32 , G11B5/02
CPC分类号： H04N5/783 , G11B15/1875 , G11B20/00007 , G11B20/10 , G11B20/1833 , G11B5/0086 , H04N19/124 , H04N19/186 , H04N19/1883 , H04N19/50 , H04N19/61 , H04N19/63 , H04N19/102 , H04N19/13 , H04N19/30 , H04N19/65 , H04N19/89 , H04N5/78263 , H04N5/9261 , H04N5/9264
摘要： During shuttle mode operation in a system for the reproduction and storage of frequency separated video signals, the read head intersects a plurality of tracks corresponding to different fields of the image rather than following complete tracks. Accordingly, the full information for any one field is not recovered. To provide an image during shuttle mode, the system reads the dc luminance information of the tracks it intersects at the part where this information is stored. As the information content of the dc luminance information is relatively high, a recognisable image can be formed from this information alone. The dc luminance information is stored in the center of the tracks with the other components arranged in order of increasing frequency towards the edge of the tape. The data which is most important to generation of a high quality image is stored in a place where it is less likely to be degraded.
摘要翻译： 在用于再现和存储频率分离的视频信号的系统中的穿梭模式操作期间，读取头与对应于图像的不同场的多个轨道相交，而不是跟随完整的轨道。 因此，任何一个字段的完整信息都无法恢复。 为了在穿梭模式期间提供图像，系统在存储该信息的部分读取与其相交的轨道的直流亮度信息。 由于直流亮度信息的信息内容相对较高，所以只能从该信息形成可识别的图像。 直流亮度信息被存储在轨道的中心，其他分量按照磁带边缘的频率递增的顺序排列。 对生成高质量图像最重要的数据被存储在不太可能劣化的地方。
-
公开(公告)号：US5214502A
公开(公告)日：1993-05-25
申请号：US810337
申请日：1991-12-19
CPC分类号： H04N11/042 , H04N19/126 , H04N19/186 , H04N19/63 , H04N19/10 , H04N19/102
摘要： To enable a digital composite color video signal (NTSC or PAL) to be compressed directly, that is without dividing it into its components and compressing the components separately, the digital composite color video signal is decorrelated, for example by spatial sub-band filtering, to form data sets, for example sub-bands, representing dc luminance information, ac luminance information and dc chrominance information. The data sets are then quantized in accordance with respective quantization values from a quantization matrix, those quantization values being such that the amount of quantization of each of some of the data sets to which the dc luminance information and the dc chrominance information is at least predominantly confined is less than the average of the amounts of quantization of the remaining data sets. At least some of the quantized data sets are then entropy encoded.
摘要翻译： 为了使数字复合彩色视频信号（NTSC或PAL）能够被直接压缩，即不将其划分成其组件并分别压缩组件，数字复合彩色视频信号例如通过空间子带滤波去相关， 以形成表示直流亮度信息，交流亮度信息和直流色度信息的数据组，例如子带。 然后根据来自量化矩阵的相应量化值量化数据组，这些量化值使得直流亮度信息和直流色度信息至少主要地对数据集中的每一个的量化量 限制小于剩余数据集的量化量的平均值。 至少一些量化数据集然后被熵编码。
-
公开(公告)号：US5231487A
公开(公告)日：1993-07-27
申请号：US810335
申请日：1991-12-19
CPC分类号： G11B20/10 , G11B20/00007 , G11B20/1833 , H04N19/124 , H04N19/186 , H04N19/1883 , H04N19/50 , H04N19/61 , H04N19/63 , H04N19/102 , H04N19/13 , H04N19/65 , H04N19/89
摘要： Apparatus for storing a video signal includes a signal compression arrangement constituted by a spatial two-dimensional sub-band filtering arrangement that filters a digital video signal to form data sets constituting respective sub-bands of the two-dimensional spatial frequency domain, a quantizer that quantizes the data sets in accordance with respective values which are such that the amount of quantization of one of the data sets constituting a sub-band to which dc luminance information of the signal is at least predominantly confined is less than the average of the amounts of quantization of the remaining data sets, and an entropy encoder that selectively encodes at least some of the quantized data sets so that the quantized data sets, as selectively entropy encoded, form a compressed video signal. The signal compression arrangement is followed by a storage arrangement for storing the compressed video signal.
摘要翻译： 用于存储视频信号的装置包括由空间二维子带滤波装置构成的信号压缩装置，其对数字视频信号进行滤波以形成构成二维空间频域的各个子带的数据集;量化器， 根据相应的值量化数据集，这些值使得构成信号的直流亮度信息至少主要被限制的子带的数据组之一的量化量小于该信号的直流亮度信息至少主要被限制的子带的量化的量 剩余数据集的量化，以及选择性地编码至少一些量化数据集的熵编码器，使得作为选择性熵编码的量化数据集形成压缩视频信号。 信号压缩布置之后是用于存储压缩视频信号的存储装置。
-
10.发明授权Recording medium for storing and an apparatus and method for recording a frequency separated video signal 失效用于存储的记录介质和用于记录频率分离视频信号的装置和方法
公开(公告)号：US5610775A
公开(公告)日：1997-03-11
申请号：US229644
申请日：1994-04-19
IPC分类号： G06T9/00 , G11B5/008 , G11B15/18 , G11B20/00 , G11B20/10 , G11B20/18 , H04N5/7826 , H04N5/783 , H04N5/91 , H04N5/92 , H04N5/926 , H04N7/26 , H04N7/32 , G11B5/02
CPC分类号： H04N5/783 , G11B15/1875 , G11B20/00007 , G11B20/10 , G11B20/1833 , G11B5/0086 , H04N19/124 , H04N19/186 , H04N19/1883 , H04N19/50 , H04N19/61 , H04N19/63 , H04N19/102 , H04N19/13 , H04N19/30 , H04N19/65 , H04N19/89 , H04N5/78263 , H04N5/9261 , H04N5/9264
摘要： During shuttle mode operation in a system for the reproduction and storage of frequency separated video signals, the read head intersects a plurality of tracks corresponding to different fields of the image rather than following complete tracks. Accordingly, the full information for any one field is not recovered. To provide an image during shuttle mode, the system reads the dc luminance information of the tracks it intersects at the part where this information is stored. As the information content of the dc luminance information is relatively high, a recognisable image can be formed from this information alone. The dc luminance information is stored in the centre of the tracks with the other components arranged in order of increasing frequency towards the edge of the tape. The data which is most important to generation of a high quality image is stored in a place where it is less likely to be degraded.
摘要翻译： 在用于再现和存储频率分离的视频信号的系统中的穿梭模式操作期间，读取头与对应于图像的不同场的多个轨道相交，而不是跟随完整的轨道。 因此，任何一个字段的完整信息都无法恢复。 为了在穿梭模式期间提供图像，系统在存储该信息的部分读取与其相交的轨道的直流亮度信息。 由于直流亮度信息的信息内容相对较高，所以只能从该信息形成可识别的图像。 直流亮度信息被存储在轨道的中心，其他分量按照磁带边缘的频率递增的顺序排列。 对生成高质量图像最重要的数据被存储在不太可能劣化的地方。
-
-
-
-
-
-
-
-
-
搜索结果
61 条记录 (耗时 0.033 秒)
