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1. 发明授权

US6133956A Dual standard video signals processor 失效
标题翻译：双标准视频信号处理器
公开(公告)号：US6133956A
公开(公告)日：2000-10-17
申请号：US826655
申请日：1997-04-07
申请人： Michael John Ludgate , Jonathan Mark Greenwood , Mark John McGrath
发明人： Michael John Ludgate , Jonathan Mark Greenwood , Mark John McGrath
IPC分类号： H04N11/20 , H04N5/45 , H04N5/46 , H04N5/66 , H04N7/01 , H04N9/64
CPC分类号： H04N7/01 , H04N5/46 , H04N5/45 , H04N9/64
摘要： A video signal processor interpolating lines in a vertical filter (24) in dependence on whether the lines are of a 625 line frame or a 525 line frame. The interpolated lines are filtered in a horizontal filter (26). The resultant lines are vertically and horizontally decimated by controlling the writing of the lines into a FIFO (28). A reduced size image is produced which has the same number of lines and pixels per line for both 525 and 625 line frames. The reduced size image is data compressed in a JPEG codec (50). The compression factor for a 525/60 signal is 6/5 of that for a 625/50 signal so the data rate per unit time is the same for both signals.
摘要翻译：视频信号处理器根据线是625行帧还是525行帧来插入垂直滤波器（24）中的线。插入线在水平滤波器（26）中滤波。通过控制将行写入到FIFO（28）中，所得到的行被垂直和水平地抽取。产生缩小尺寸的图像，其对于525和625行帧都具有与每行相同数量的行和像素。缩小尺寸的图像是以JPEG编解码器（50）压缩的数据。 525/60信号的压缩因子是625/50信号的6/5，因此两个信号的每单位时间的数据速率是相同的。

2. 发明授权

US6124894A Audio signal processor 失效
标题翻译：音频信号处理器
公开(公告)号：US6124894A
公开(公告)日：2000-09-26
申请号：US827526
申请日：1997-03-28
申请人： Jonathan Mark Greenwood , Michael John Ludgate
发明人： Jonathan Mark Greenwood , Michael John Ludgate
IPC分类号： H04N5/765 , G11B20/10 , H04N5/60 , H04N5/781 , H04N5/91 , H04N5/926 , H04N7/084 , H04N7/00 , H04N7/087
CPC分类号： H04N5/9268 , H04N7/084 , H04N5/602
摘要： NTSC signals have a frame rate of 29.97 frames per second. In SDI, audio data is sampled at a rate 30n where n is an integer, e.g. 48K samples per second. Thus there are 1601.6 samples per frame. Although there are an integer number 8008 samples per five frame sequence, two frames have 1601 samples and 3 frames have 1602 samples. This creates a variable storage requirements from frame to frame and causes problems in editing. The SDI audio data is separated from associated video and decimated by a factor h, where h=4 for example in a signal processor 2, 3, 4, 5 and 6. The decimated data is written into a FIFO circuit at the rate 30n/h synchronously with frame timing under the control of a frame reference generator 10, 9. A fixed integer number n/h of samples is written into the FIFO 7 in each frame under the control of a write control circuit 8. n/h=400 for example, where n=1600 and h=4. Any additional sample in each frame is dropped. The 400 sample frames are stored on a disc 14. If it is desired to reproduce the samples, they are written into a FIFO 12. A read control circuit 13 reads the samples out synchronously with the video frame rate. In three frames 400 samples are read out: in two frames 401 samples are read out.
摘要翻译： NTSC信号的帧速率为29.97帧/秒。在SDI中，音频数据以速率30n采样，其中n是整数，例如每秒48K个样品。因此，每帧有1601.6个样本。虽然每五帧序列有一个整数8008个样本，但两帧具有1601个样本，3个帧具有1602个样本。这会从一帧到另一个创建一个可变存储要求，并导致编辑问题。 SDI音频数据与相关联的视频分离，并以例如在信号处理器2,3,4,5和6中h = 4的因子h抽取。抽取的数据以速率30n / 在帧参考发生器10,9的控制下与帧定时同步。在写控制电路8的控制下，将每个帧中的固定整数n / h个样本写入FIFO 7中。n / h = 400 例如，其中n = 1600和h = 4。每个帧中的任何附加样本被丢弃。 400个样本帧被存储在盘14上。如果希望再现样本，则将它们写入FIFO12中。读取控制电路13与视频帧速率同步地读取样本。在三帧中，读出400个样本：在两个帧401中读取样本。

3. 发明授权

US5842171A Audio signal processor 失效
标题翻译：音频信号处理器
公开(公告)号：US5842171A
公开(公告)日：1998-11-24
申请号：US827527
申请日：1997-03-28
申请人： Jonathan Mark Greenwood , Michael John Ludgate
发明人： Jonathan Mark Greenwood , Michael John Ludgate
IPC分类号： H04N5/765 , G11B20/10 , H04N5/60 , H04N5/781 , H04N5/91 , H04N5/926 , H04L7/00
CPC分类号： H04N5/9268 , H04N5/602
摘要： Digital audio data occurs in groups of data samples spaced apart in time. The data rate in the groups is much greater than the audio data sampling rate. The audio data may be embedded in the horizontal blanking interval of a video signal as in SDI. The audio data is extracted (2) from the video signal and the samples stored in a FIFO (3). The FIFO (3) removes the spacing between the groups of samples. Sets of the samples are weighted and summed in a multiplier (4) and accumulator (5). Each set to be weighted and summed is displaced by a preset number of samples relative to the previous set to decimate the audio data.
摘要翻译：数字音频数据以时间间隔开的数据样本组发生。组中的数据速率远远大于音频数据采样率。音频数据可以嵌入在SDI中的视频信号的水平消隐间隔中。从视频信号和存储在FIFO（3）中的样本中提取（2）音频数据。 FIFO（3）消除了样本组之间的间隔。将样本集合加权并乘以乘法器（4）和累加器（5）。要被加权和求和的每个集合相对于先前的集合移位预设数量的样本以抽取音频数据。

4. 发明授权

US6044431A Data buffer using dummy data 失效
标题翻译：数据缓冲区使用虚拟数据
公开(公告)号：US6044431A
公开(公告)日：2000-03-28
申请号：US833771
申请日：1997-04-09
申请人： Jonathan Mark Greenwood , Michael John Ludgate
发明人： Jonathan Mark Greenwood , Michael John Ludgate
IPC分类号： G06F12/00 , G06F5/10 , G06F5/12 , H04L13/08
CPC分类号： G06F5/10
摘要： Data buffering apparatus comprises a data memory in which input data are written to the memory in contiguous groups at memory addresses defined by a write pointer and data are read from the memory at a memory address defined by a read pointer; and means for writing a dummy group of data at the end of at least some of the input data groups, the dummy groups of data being read from the memory and discarded before a subsequently written input data group is read.
摘要翻译：数据缓冲装置包括数据存储器，其中输入数据以连续的组写入由写指针定义的存储器地址处的存储器中，并且在由读指针定义的存储器地址处从存储器读取数据; 以及用于在至少一些输入数据组的末尾写入一组虚拟数据组的装置，该数据的虚拟组从存储器读取并在随后写入的输入数据组被读取之前被丢弃。

5. 发明授权

US06373895B1 Video data compression with trial encoder 有权
公开(公告)号：US06373895B1
公开(公告)日：2002-04-16
申请号：US09317324
申请日：1999-05-24
申请人： Nicholas Ian Saunders , Clive Henry Gillard , Michael John Ludgate
发明人： Nicholas Ian Saunders , Clive Henry Gillard , Michael John Ludgate
IPC分类号： H04N718
摘要： Video data compression apparatus in which successive groups of two or more images are encoded subject to a predetermined limit on the quantity of output encoded data to be generated for each group of images, comprises a trial encoder for encoding at least a subset of images of a current group of images to generate trial-encoded data for each trial-encoded image; a data quantity allocator, responsive to the quantities of trial-encoded data generated by the trial encoder, for allocating respective quantities of output encoded data for each image in the group of images; and a final encoder for encoding each image of the group of images in accordance with the quantities of output encoded data allocated to that image by the data quantity allocator.

6. 发明授权

US6028633A Video data compression with trial encoder 失效
公开(公告)号：US6028633A
公开(公告)日：2000-02-22
申请号：US733426
申请日：1996-10-18
申请人： Nicholas Ian Saunders , Clive Henry Gillard , Michael John Ludgate
发明人： Nicholas Ian Saunders , Clive Henry Gillard , Michael John Ludgate
IPC分类号： G06T9/00 , H03M7/40 , H04N7/26 , H04N7/50 , H04N7/12 , H04N11/02
CPC分类号： H04N19/192 , H04N19/124 , H04N19/15 , H04N19/159 , H04N19/174 , H04N19/176 , H04N19/177 , H04N19/61 , H04N19/63 , H04N19/10 , H04N19/115 , H04N19/146
摘要： Video data compression apparatus in which successive groups of two or more images are encoded subject to a predetermined limit on the quantity of output encoded data to be generated for each group of images, comprises a trial encoder for encoding at least a subset of images of a current group of images to generate trial-encoded data for each trial-encoded image; a data quantity allocator, responsive to the quantities of trial-encoded data generated by the trial encoder, for allocating respective quantities of output encoded data for each image in the group of images; and a final encoder for encoding each image of the group of images in accordance with the quantities of output encoded data allocated to that image by the data quantity allocator.

7. 发明授权

US5892545A Video compression with code allocation based on image detail 失效
标题翻译：基于图像细节的视频压缩与代码分配
公开(公告)号：US5892545A
公开(公告)日：1999-04-06
申请号：US733425
申请日：1996-10-18
申请人： Nicholas Ian Saunders , Clive Henry Gillard , Michael John Ludgate , Jonathan James Stone
发明人： Nicholas Ian Saunders , Clive Henry Gillard , Michael John Ludgate , Jonathan James Stone
IPC分类号： H03M7/36 , H04N7/26 , H04N7/50 , H04N7/24
CPC分类号： H04N19/142 , H04N19/14 , H04N19/159 , H04N19/176 , H04N19/61 , H04N19/63 , H04N19/115 , H04N19/146 , H04N19/152
摘要： Video data compression apparatus in which successive images are encoded, comprises a data quantity allocator for allocating respective quantities of output encoded data for two or more complementary areas of each image; and an encoder for encoding each area of each image of the group of images in accordance with the quantity of output encoded data allocated to that area.
摘要翻译：编码连续图像的视频数据压缩装置包括用于分配每个图像的两个或更多个互补区域的输出编码数据的相应数量的数据量分配器; 以及编码器，用于根据分配给该区域的输出编码数据的数量对该组图像的每个图像的每个区域进行编码。

8. 发明授权

US5684896A Data compression 失效
标题翻译：数据压缩
公开(公告)号：US5684896A
公开(公告)日：1997-11-04
申请号：US263260
申请日：1994-06-21
申请人： Jonathan James Stone , Rajan Bhandari , Michael John Ludgate , Terence Ralph Hurley
发明人： Jonathan James Stone , Rajan Bhandari , Michael John Ludgate , Terence Ralph Hurley
IPC分类号： H03M7/30 , G06T9/00 , H04N7/26 , H04N7/30
CPC分类号： H04N19/152 , H04N19/126 , H04N19/149 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/60 , H04N19/63 , H04N19/10 , H04N19/115 , H04N19/146
摘要： A data compression apparatus is described which applies a dynamically variable degree of quantisation Q.sub.s to input data so as to control blocks of output data to have a predetermined maximum size. The dynamic control can be carried out on an inter-block basis or an intra-block basis. An overflow detector is provided for inserting an overflow indicator within blocks of compressed data to indicate when overflow has occurred.
摘要翻译：描述了一种数据压缩装置，其将动态可变的量化量Qs应用于输入数据，以便控制输出数据块具有预定的最大尺寸。动态控制可以在块间或块内进行。提供溢出检测器，用于在压缩数据块内插入溢出指示符，以指示何时发生溢出。

9. 发明授权

US5926612A Apparatus for recording data with a multi-level arrangement of error correction coding 失效
标题翻译：用于以纠错编码的多级排列记录数据的装置
公开(公告)号：US5926612A
公开(公告)日：1999-07-20
申请号：US598365
申请日：1996-02-08
申请人： Clive Henry Gillard , James Hedley Wilkinson , Michael John Ludgate , Jonathan James Stone
发明人： Clive Henry Gillard , James Hedley Wilkinson , Michael John Ludgate , Jonathan James Stone
IPC分类号： H04N5/7826 , G11B5/09 , G11B20/18 , H04N5/92 , H04N9/797 , H04N9/804 , H04N5/76
CPC分类号： G11B20/1813 , H04N9/8042 , H04N9/7973
摘要： An apparatus for recording video data with a multi-level arrangement of error correction coding. Input video data is demultiplexed so as to form a plurality of data streams each having a plurality of data blocks. A stream error correcting code is generated for each of the plurality of data streams, which is adaptable to allow correction of a data block. The respective data blocks and stream error correcting code of each data stream is distributed or arranged in a predetermined manner. The distributed data blocks and stream error correcting code of each data stream are recorded on recording tracks of a recording medium by n recording heads such that only either a data block or a stream error correcting code of a respective data stream is recorded at corresponding positions along n adjacent recording tracks of the recording medium. Additionally, track error correction codes and inner error correction codes may be provided which may enable correction of data recorded on a respective track and error correction for inner blocks, respectively.
摘要翻译：一种用于以纠错编码的多级布置记录视频数据的装置。输入视频数据被解复用以形成多个数据流，每个数据流具有多个数据块。针对可适应于允许校正数据块的多个数据流中的每一个生成流纠错码。每个数据流的相应数据块和流纠错码以预定的方式分布或排列。每个数据流的分布式数据块和流纠错码由n个记录头记录在记录介质的记录磁道上，使得只有相应数据流的数据块或流纠错码才能被记录在相应的位置 n个记录介质的相邻记录轨道。此外，可以提供轨道纠错码和内部纠错码，其可以分别使得能够对记录在各个轨道上的数据进行校正和内部块的误差校正。

10. 发明授权

US5757973A Compression of image data seperated into frequency component data in a two dimensional spatial frequency domain 失效
标题翻译：将图像数据压缩成二维空间频域中的频率分量数据
公开(公告)号：US5757973A
公开(公告)日：1998-05-26
申请号：US809278
申请日：1991-12-17
申请人： James Hedley Wilkinson , Jonathan James Stone , Michael John Ludgate
发明人： James Hedley Wilkinson , Jonathan James Stone , Michael John Ludgate
IPC分类号： H03M7/46 , G06T9/00 , H03M7/30 , H04N1/41 , H04N7/26 , G06K9/36
CPC分类号： H04N19/1883 , H04N19/129 , H04N19/186 , H04N19/61 , H04N19/63 , H04N19/124 , H04N19/13 , H04N19/91
摘要： A data compression system decorrelates input data into sets of frequency component data. Different sets of frequency component data are entropy encoded using different coding tables matched to the data values characteristic of the sets of frequency component data they are used to compress. Matching the coding tables to the sets of frequency component data improves compression. The order in which the data values from within each set of frequency component data is fed to the entropy encoder is varied to exploit any intra-set correlation.
摘要翻译：数据压缩系统将输入数据分解为频率分量数据集。使用与其用于压缩的频率分量数据组的特性的数据值匹配的不同编码表对不同组的频率分量数据进行熵编码。将编码表与频率分量数据组匹配可以改善压缩。来自每组频率分量数据内的数据值被馈送到熵编码器的顺序是变化的，以利用任何内置的相关性。

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