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1.发明授权
公开(公告)号：US5448368A
公开(公告)日：1995-09-05
申请号：US241978
申请日：1994-05-12
CPC分类号： H04N9/8047 , H04N5/783
摘要： Arrangements for recording and reproducing datareduced videoinformation are described. The recording arrangement comprises a datareduction unit (3) and a formatting unit (4). The formatting unit (4) generates packets (P.sub.i) each having a first, second and third packet portion (PP.sub.1, PP.sub.2 and PP.sub.3). The first packet portion comprises a sync word (SW) and an identification word. The second packet portion comprises datareduced videoinformation of a first and a second datablock (MB.sub.0, MB.sub.1). A datablock comprises DC coefficients (DC.sub.i) and most significant and least significant AC coefficients (MAC.sub.i, LAC.sub.i). The videoinformation comprised in the first and the second datablock are stored in the second packet portion (PP.sub.2), such that the DC coefficients of the first datablock (DC.sub.0) are stored first, the plurality of most significant AC coefficients (MAC.sub.0) of the first datablock are stored next, the DC coefficients of the second datablock (DC.sub.1) are stored last in the second packet portion, and the plurality of most significant AC coefficients (MAC.sub.1) of the second datablock are stored before the DC coefficients of the second datablock in the second packet portion. This enables an improved reproduction of the videosignal in a feature mode.
摘要翻译： 描述用于记录和再现数据的视频信息的安排。 记录装置包括数据采集单元（3）和格式化单元（4）。 格式化单元（4）产生每个具有第一，第二和第三分组部分（PP1，PP2和PP3）的分组（Pi）。 第一分组部分包括同步字（SW）和识别字。 第二分组部分包括第一和第二数据块（MB0，MB1）的数据导致的视频信息。 数据块包括DC系数（DCi）和最重要和最不重要的AC系数（MACi，LACi）。 包括在第一和第二数据块中的视频信息被存储在第二分组部分（PP2）中，使得首先存储第一数据块（DC0）的DC系数，第一数据块的多个最高有效AC系数（MAC0） 接下来存储数据块，第二数据块（DC1）的DC系数最后存储在第二分组部分中，并且第二数据块的多个最高有效AC系数（MAC1）被存储在第二数据块的DC系数之前 第二分组部分。 这使得能够在特征模式下改进视频信号的再现。
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2.发明授权Device for transmitting or storing digital television pictures, and device for receiving said pictures 失效用于发送或存储数字电视图像的装置，以及用于接收所述图像的装置
公开(公告)号：US5570132A
公开(公告)日：1996-10-29
申请号：US254092
申请日：1994-06-06
CPC分类号： H04N7/54 , H04N19/89 , H04N9/8047 , H04N5/783
摘要： Device for transmitting or storing digital television pictures in which a maximum possible number of data of a group of transformed pixel blocks (DB.sub.1 . . . DB.sub.12) is transmitted in the form of variable-length code words (V.sub.1 . . . V.sub.N) in a corresponding channel block of predetermined length (FIG. 5A). If all code words of the groups of blocks are accommodated in the corresponding channel block (FIG. 5C), the channel block will also comprise surplus data of other blocks. The boundary, within a channel block, between these code words and surplus data is transmitted in the form of an address (P) which is accommodated at a predetermined position of the channel block. If the channel block length is inadequate for transmitting all code words of the group of blocks, the channel block (FIG. 5B), will comprise at least the code words which are representative of the DC coefficient and a number of important AC coefficients of each block. Said code words are accommodated in successive channel block sections (L.sub.1 . . . L.sub.12), with a code (C) for the length of these channel block sections being transmitted at predetermined positions of the channel block.
摘要翻译： 用于发送或存储数字电视图像的装置，其中以可变长度码字（V1 ... VN）的形式发送一组经转换的像素块（DB1 ... DB12）的最大可能数量的数据， 相应的预定长度的通道块（图5A）。 如果块组中的所有码字被容纳在对应的信道块（图5C）中，则信道块还将包括其他块的剩余数据。 信道块内的这些码字与剩余数据之间的边界以容纳在信道块的预定位置的地址（P）的形式发送。 如果信道块长度不足以发送块组的所有码字，则信道块（图5B）将至少包括表示DC系数的码字和每个的重要AC系数的数量 块。 所述码字被容纳在连续的信道块部分（L1 ... L12）中，其中这些信道块部分的长度的码（C）在信道块的预定位置发送。
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3.发明授权Method of and system for transmitting and receiving digitally encoded video images 失效用于发送和接收数字编码视频图像的方法和系统
公开(公告)号：US5583651A
公开(公告)日：1996-12-10
申请号：US601270
申请日：1996-02-14
摘要： Video images are encoded by transform coding, resulting in data blocks each including a DC-coefficient and a plurality of AC-coefficients. The coefficients of a number of said transform blocks are variable-length encoded and transmitted. In order to avoid a complete loss of datablocks in case of a transmission error, the most significant codewords of a group of blocks are transmitted first so as to achieve that at least the DC-level of the blocks is likely to be retained. The coefficients may also be recorded on a videorecorder. Fast playback of recorded images so encoded, leads to very poor quality because some data blocks are not being read in the search mode. To improve this quality the DC-coefficients and if desired predetermined AC-coefficients of selected ones of the transform blocks to be recorded on one track are packed together to form a DC-packet and such packet is recorded on a selected part of the track. The DC-packet is chosen such that it can be read out as a unit at various search speeds, and can be read partially at higher search speeds.
摘要翻译： 视频图像通过变换编码进行编码，得到各自包含DC系数和多个AC系数的数据块。 所述多个变换块的系数被可变长度编码和发送。 为了避免在传输错误的情况下数据块的完全丢失，首先发送一组块的最重要的码字，以便达到至少可以保留块的DC级别。 系数也可以记录在录像机上。 由于某些数据块在搜索模式下未被读取，因此快速重放所编码的记录图像，导致质量非常差。 为了提高这种质量，要记录在一个磁道上的DC系数以及如果期望的所选择的变换块的预定AC系数被打包在一起以形成DC分组，并且这样的分组被记录在轨道的选定部分上。 选择DC分组，使得其可以以各种搜索速度作为单元读出，并且可以在较高的搜索速度下部分地读取。
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4.发明授权Television picture signal processing in which video and graphic signals are compressed using different compression algorithms stored in a same memory, and decompressed for display 失效电视图像信号处理，其中使用存储在同一存储器中的不同压缩算法来压缩视频和图形信号，并且解压缩以进行显示公开(公告)号：US06175386B1
公开(公告)日：2001-01-16
申请号：US09090001
申请日：1998-06-02
IPC分类号： H04N5445
CPC分类号： H04N5/44504 , H04N7/088 , H04N19/10 , H04N19/12 , H04N19/14 , H04N19/146 , H04N19/176 , H04N19/426 , H04N21/42653 , H04N21/482 , H04N21/485 , H04N21/488 , H04N21/8126
摘要： Field or frame memories are often used in television receivers for video signal processing functions, such as noise reduction and/or flicker reduction. Television receivers also have graphic features such as teletext, menu-driven control systems, multilingual subtitling, an electronic TV-Guide, etc. In a method of processing television picture signals including both video (VID) and graphic (GFX) information, the video and graphic signals are individually compressed in accordance with different (lossy and loss-less, respectively) compression algorithms (22;24), stored in the same field or frame memory (21), and decompressed (23;25) after processing (20). As such, a significant reduction of memory capacity is achieved without adversely affecting the graphics quality. The method is not only applicable to locally generated graphic signals (TXT,OSD) but also to graphic information which is detected (26) as being embedded in a received television signal.
摘要翻译： 通常在电视接收机中使用场或帧存储器来进行视频信号处理功能，例如噪声降低和/或闪烁降低。 电视接收机还具有诸如图文电视，菜单驱动控制系统，多语言字幕，电子电视指南等图形功能。在处理包括视频（VID）和图形（GFX）信息两者的电视图像信号的方法中，视频 根据存储在相同字段或帧存储器（21）中的不同（有损耗和无损耗）压缩算法（22; 24），并且在处理之后解压缩（23; 25）（20）来分别压缩图形信号 ）。 因此，在不会对图形质量产生不利影响的情况下实现显着降低存储器容量。 该方法不仅适用于本地生成的图形信号（TXT，OSD），还适用于被检测（26）嵌入在接收的电视信号中的图形信息。
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5.发明授权System and method for improving video recorder performance in a search mode 失效用于在搜索模式下提高录像机性能的系统和方法
公开(公告)号：US06072935A
公开(公告)日：2000-06-06
申请号：US734712
申请日：1996-10-21
IPC分类号： G11B5/53 , G11B5/027 , G11B15/18 , G11B15/467 , G11B20/10 , G11B20/12 , G11B27/00 , H04N5/782 , H04N5/7826 , H04N5/783 , H04N5/92 , H04N5/93 , H04N5/937 , H04N9/804 , H04N9/87
CPC分类号： G11B15/1875 , G11B20/1204 , G11B20/1208 , G11B27/005 , H04N5/783 , H04N5/937 , H04N9/8047 , G11B2220/90 , H04N5/78263 , H04N5/78266
摘要： A method and apparatus wherein video images are recorded on a plurality of tracks of a tape such that, for playback in a search mode at a speed higher than the recording speed, the displayed image will consist of a plurality of contiguous parts, some of the parts being read out from tracks each having a different frame recorded thereon.
摘要翻译： 一种方法和装置，其中视频图像被记录在磁带的多个轨道上，使得为了以搜索模式以高于记录速度的速度重放，所显示的图像将由多个相邻部分组成， 从每个记录有不同帧的轨道读出零件。
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6.发明授权Television system for transmitting digitized television pictures from a transmitter to a receiver where different transform coding techniques are selected on the determination of motion 失效用于将数字化电视图像从发射机发送到接收机的电视系统，其中在确定运动时选择不同的变换编码技术
公开(公告)号：US5402185A
公开(公告)日：1995-03-28
申请号：US278711
申请日：1994-07-22
CPC分类号： H04N19/112 , H04N5/144 , H04N5/9264
摘要： A motion detector, particularly for use in a television system for transmitting television pictures in a digital form, is adapted to partition each picture into pixel blocks, to subject each pixel block to a modified intraframe transform for determining a first coefficient which corresponds to the basic picture having the lowest horizontal and highest vertical frequency, and to determine a plurality of further coefficients which correspond to basic pictures also having the lowest horizontal frequency, but a vertical frequency which is lower than that for the first coefficient. The motion detector signalizes the presence of motion within a pixel block if the first coefficient has a large absolute value, but if simultaneously none of the further coefficients has a sufficiently large absolute value. If the first coefficient has a sufficiently large absolute value, absence of motion is nevertheless signalized if simultaneously one of the further coefficients also has a sufficiently large absolute value.
摘要翻译： 特别是用于以数字形式发送电视图像的电视系统中的运动检测器适于将每个图像划分为像素块，以使每个像素块经受修改的帧内变换，以确定对应于基本数据的第一系数 具有最低水平和最高垂直频率的图像，并且确定对应于也具有最低水平频率但是低于第一系数的垂直频率的基本图像的多个另外的系数。 如果第一系数具有大的绝对值，则运动检测器通知像素块内的运动的存在，但是如果同时没有一个进一步的系数具有足够大的绝对值。 如果第一系数具有足够大的绝对值，则如果同时其中一个系数也具有足够大的绝对值，则仍然发出不存在运动信号。
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7.发明授权Encoding circuit for transform coding of a picture signal and decoding circuit for decoding said signal 有权用于图像信号的变换编码的编码电路和用于解码所述信号的解码电路公开(公告)号：US07646813B2
公开(公告)日：2010-01-12
申请号：US10364857
申请日：2003-02-07
IPC分类号： H04N7/18
CPC分类号： H04N19/126 , H04N5/9264 , H04N19/112 , H04N19/124 , H04N19/132 , H04N19/60
摘要： An encoding circuit transforms a picture signal into blocks of, for example, 8*8 coefficients, in which each block of coefficients is read motion- adaptively. In the case of motion within a sub-picture, the block of coefficients is read in such an order that the obtained series of coefficients includes, as it were, two interleaved sub-series. The first series starts with a dc component. In a first embodiment, the second series starts with the most relevant motion coefficient. In a second embodiment, two interlaced sub-fields are separately transformed and the second series also starts with a dc coefficient. As a result, the coefficients are transmitted as much as possible in their order of significance. This particularly produces the largest possible clusters of zero value coefficients. Such clusters are transmitted as one compact run-length code so that an effective bit rate reduction is achieved, also for moving pictures.
摘要翻译： 编码电路将图像信号变换为例如8×8系数的块，其中每个块系数被运动自适应地读取。 在子图像内运动的情况下，以所得到的一系列系数作为两个交错子序列的顺序读取系数块。 第一个系列以直流分量开始。 在第一实施例中，第二系列以最相关的运动系数开始。 在第二实施例中，两个隔行的子场被单独变换，第二个串也是以直流系数开始的。 结果，系数以其重要的顺序尽可能多地传输。 这特别产生了最大可能的零值系数簇。 这样的集群作为一个紧凑的游程长度代码被发送，使得实现有效的比特率降低，也用于运动图像。
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8.发明授权Encoding circuit for transform coding of a picture signal and decoding circuit for decoding said signal 有权用于图像信号的变换编码的编码电路和用于解码所述信号的解码电路公开(公告)号：US06385247B1
公开(公告)日：2002-05-07
申请号：US09634730
申请日：2000-08-03
IPC分类号： H04N730
CPC分类号： H04N19/126 , H04N5/9264 , H04N19/112 , H04N19/124 , H04N19/132 , H04N19/60
摘要： An encoding circuit transforms a picture signal into blocks of, for example, 8*8 coefficients, in which each block of coefficients is read motion- adaptively. In the case of motion within a sub-picture, the block of coefficients is read in such an order that the obtained series of coefficients includes, as it were, two interleaved sub-series. The first series starts with a do component, In a first embodiment, the second series starts with the most relevant motion coefficient. In a second embodiment, two interlaced sub-fields are separately transformed and the second series also starts with a dc coefficient. As a result, the coefficients are transmitted as much as possible in their order of significance. This particularly produces the largest possible clusters of zero value coefficients. Such clusters are transmitted as one compact run-length code so that an effective bit rate reduction is achieved, also for moving pictures.
摘要翻译： 编码电路将图像信号变换为例如8×8系数的块，其中每个块系数被运动自适应地读取。 在子图像内运动的情况下，以所得到的一系列系数作为两个交错子序列的顺序读取系数块。 第一系列以一个do分量开始。在第一实施例中，第二系列以最相关的运动系数开始。 在第二实施例中，两个隔行的子场被单独变换，第二个串也是以直流系数开始的。 结果，系数以其重要的顺序尽可能多地传输。 这特别产生了最大可能的零值系数簇。 这样的集群作为一个紧凑的游程长度代码被发送，使得实现有效的比特率降低，也用于运动图像。
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公开(公告)号：US5109271A
公开(公告)日：1992-04-28
申请号：US727292
申请日：1991-07-09
CPC分类号： H04N11/042
摘要： In a television transmission system a digital luminance signal Dy and two digital color difference signals DCHR(1) and DCHR(2) are applied to a distribution circuit 3 at the transmitter end, which digital color difference signals are applied thereto possibly after having been subjected to a vertical decimation operation with a decimation factor R. The distribution circuit 3 partitions all these signals into groups of Q sample per group. After receiving an even number of luminance groups and an even number of chrominance groups, a first half of this number of luminance groups and a first half of this number of chrominance groups is applied to a first auxiliary picture signal output 3(4) of the distribution circuit 3, while simultaneously the other half of the number of luminance groups and the other half of the number of chrominance groups is applied to a second auxiliary picture signal output (3(5) of the distribution circuit. A transformer for performing a forward two-dimensional Q*Q transform is connected to each of these auxiliary picture signal outputs.
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10.发明授权System and method for improving video recorder performance in a search mode 有权用于在搜索模式下提高录像机性能的系统和方法
公开(公告)号：US6167191A
公开(公告)日：2000-12-26
申请号：US442958
申请日：1999-11-18
IPC分类号： G11B5/53 , G11B5/027 , G11B15/18 , G11B15/467 , G11B20/10 , G11B20/12 , G11B27/00 , H04N5/782 , H04N5/7826 , H04N5/783 , H04N5/92 , H04N5/93 , H04N5/937 , H04N9/804 , H04N9/87
CPC分类号： G11B15/1875 , G11B20/1204 , G11B20/1208 , G11B27/005 , G11B2220/90 , H04N5/78263 , H04N5/78266 , H04N5/783 , H04N5/937 , H04N9/8047
摘要： A method and apparatus wherein video images are recorded on a plurality of tracks of a tape such that, for playback in a search mode at a speed, higher than the recording speed the displayed image will consist of a plurality of contiguous parts, some of the parts being read out from tracks each having a different frame recorded thereon.
摘要翻译： 一种方法和装置，其中视频图像被记录在磁带的多个轨道上，使得为了以搜索模式以高于记录速度的速度重放所显示的图像将由多个相邻部分组成， 从每个记录有不同帧的轨道读出零件。
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