Method of receiving orthogonal frequency division multiplexing signal
and receiver thereof
    81.
    发明授权
    Method of receiving orthogonal frequency division multiplexing signal and receiver thereof 失效
    正交频分复用信号的接收方法及其接收机

    公开(公告)号:US5771223A

    公开(公告)日:1998-06-23

    申请号:US621338

    申请日:1996-03-25

    摘要: A Fourier transform circuit in a receiver performs a Fourier transform on a orthogonal frequency division multiplexing signal received through a transmission channel for each symbol to sequentially reproduce a received reference vector sequence and a received vector sequence. An interleave circuit interleaves elements of the received reference vector sequence and the received vector sequence. A memory stores the received reference vector sequence. A vector modulation circuit modulates the received reference vector sequence by respective signal point vectors representing each signal point to generate a modulation vector sequence for each symbol. A metric generation circuit then obtains a difference between the received vector sequence and the modulation vector sequence to generate the difference as a branch metric sequence. A trellis decode circuit reproduces a data sequence on the basis of the branch metric sequence.

    摘要翻译: 接收机中的傅里叶变换电路对通过每个符号的传输信道接收的正交频分多路复用信号执行傅里叶变换,以顺序再现接收的参考矢量序列和接收的矢量序列。 交错电路对所接收的参考矢量序列和接收的矢量序列的元素进行交织。 存储器存储所接收的参考矢量序列。 矢量调制电路通过表示每个信号点的相应信号点矢量来调制接收到的参考矢量序列,以生成每个符号的调制矢量序列。 然后,度量产生电路获得接收的矢量序列和调制矢量序列之间的差异,以产生差分作为分支度量序列。 网格解码电路基于分支度量序列再现数据序列。

    Still image filing system
    82.
    发明授权
    Still image filing system 失效
    静像档案系统

    公开(公告)号:US5661821A

    公开(公告)日:1997-08-26

    申请号:US924763

    申请日:1992-08-04

    IPC分类号: G06T9/00

    CPC分类号: G06T9/00

    摘要: A still image filing system in which the data compressed by a compressor for data recording is supplied to a reconstructing device prior to recording to a recording medium and reconstruction still image data is generated from the reconstructing device. Before the non-compression still image data is compressed and recorded to the recording medium, consequently, a still video image by the compressed data can be easily checked.

    摘要翻译: 一种静止图像归档系统,其中由数据记录用压缩器压缩的数据在记录到记录介质之前提供给重建装置,并且从重建装置生成重建静止图像数据。 在非压缩静止图像数据被压缩并记录到记录介质之前,因此可以容易地检查通过压缩数据的静止视频图像。

    Apparatus for inspection of packaged printed circuit boards
    83.
    发明授权
    Apparatus for inspection of packaged printed circuit boards 失效
    用于检查封装印刷电路板的装置

    公开(公告)号:US5489985A

    公开(公告)日:1996-02-06

    申请号:US181586

    申请日:1994-01-14

    摘要: There is provided an apparatus of inspecting a packaged state by scanning a packaged printed circuit board with a fine light beam and detecting reflection beams of the fine light beam in a plurality of directions. A fine light beam emitted from a light source is scanned on the packaged printed circuit board substantially vertically thereto by means of a polygon mirror and a light projection f.theta. lens. An optical path correcting system receives reflection beams scattered from the packaged printed circuit board and corrects optical paths of the reflection beams. The correction is done in such a way that reflection beams having constant directional vectors regardless of the change of the scanning position of the fine light beam are received and guided to light receiving positions complying with a height at a scanning position on a plurality of photoelectric conversion devices. Through this, the packaged state of parts is inspected at a high speed, with high accuracy and over a wide range without expanding the light receiving area of the photoelectric conversion device and without causing characteristics of triogonometrical survey to change with the scanning position.

    摘要翻译: 提供了一种通过用精细光束扫描封装的印刷电路板并且检测多个方向上的精细光束的反射光来检查封装状态的装置。 通过多面反射镜和光投射光圈透镜在基板垂直于其上的印刷电路板上扫描从光源发射的精细光束。 光路校正系统接收从封装的印刷电路板散射的反射光束并校正反射光束的光路。 以这样的方式进行校正,使得具有恒定方向向量的反射光束与精细光束的扫描位置的变化无关地被接收并被引导到符合多个光电转换处的扫描位置处的高度的光接收位置 设备。 通过这种方式,在不扩大光电转换装置的光接收面积的同时,以高精度和大范围的高速度检查部件的封装状态,并且不会导致三角测量的特征随扫描位置而变化。

    Encoding and decoding devices with predictor and detector
    84.
    发明授权
    Encoding and decoding devices with predictor and detector 失效
    具有预测器和检测器的编码和解码器件

    公开(公告)号:US5313204A

    公开(公告)日:1994-05-17

    申请号:US871083

    申请日:1992-04-20

    摘要: Encoding and decoding devices which are capable of increasing the encoding and decoding speed. In arithmetic encoding, there is a possibility of encoding with high efficiency which is very close to the entropy of the information source, but the encoding and decoding time is generally longer than that in another encoding systems such as an MMR encoding system. For example, in a standard facsimile equipment, about 1.3 sec is required for encoding the picture information in an A4-size copy. In prediction encoding, a memory for storing the past reference symbols and the predicted values therefor is necessary for prediction. Since the memory capacity is generally large, a large-capacity RAM is used. The encoding time is therefore greatly dependent on the access speed of the RAM. In the present invention, a high-speed register for storing the predicted value for a special symbol pattern is provided separately from the RAM so that the predicted value of the special symbol pattern is read from this register, thereby enabling high-speed encoding.

    摘要翻译: 能够增加编码和解码速度的编码和解码装置。 在算术编码中,存在与信息源的熵非常接近的高效率的编码的可能性,但是编码和解码时间通常比在诸如MMR编码系统的另一编码系统中更长。 例如,在标准传真设备中,需要大约1.3秒来对A4尺寸的副本中的图像信息进行编码。 在预测编码中,用于存储过去的参考符号的存储器及其预测值对于预测是必要的。 由于存储容量通常较大,所以使用大容量RAM。 因此,编码时间很大程度上取决于RAM的访问速度。 在本发明中,与RAM分开提供用于存储专用符号图案的预测值的高速寄存器,从而从该寄存器读取特殊符号图案的预测值,从而实现高速编码。

    Coding method of image information
    85.
    发明授权
    Coding method of image information 失效
    图像信息编码方法

    公开(公告)号:US5059976A

    公开(公告)日:1991-10-22

    申请号:US470099

    申请日:1990-01-25

    CPC分类号: H04N1/417 H03M7/4006

    摘要: A coding method of a binary Markov information source comprises the steps of providing a range on a number line from 0 to 1 which corresponds to an output symbol sequence from the information source, and performing data compression by binary expressing the position information on the number line corresponding to the output symbol sequence. The present method further includes the steps of providing a normalization number line to keep a desired calculation accuracy by expanding a range of the number line which includes a mapping range, by means of a multiple of a power of 2, when the mapping range becomes below 0.5 of the range of the number line; allocating a predetermined mapping range on the normalization number line for less probable symbols LPS proportional to its normal occurrence probability; allocating the remaining mapping range on the normalization number line for more probable symbols MPS; and reassigning the predetermined mapping range to the remaining mapping range the half of a portion where the allocated remaining range is less than 0.5, when the allocated remaining range becomes below 0.5.

    Electrophotographic photosensitive member
    86.
    发明授权
    Electrophotographic photosensitive member 失效
    电子照相感光构件

    公开(公告)号:US4855202A

    公开(公告)日:1989-08-08

    申请号:US165099

    申请日:1988-03-07

    IPC分类号: G03G5/06 G03G5/047 G03G5/05

    摘要: An electrophotographic photosensitive member having the structure comprising a conductive substrate laminated thereon with (i) a charge generation layer comprising two or more kinds of charge-generating materials incorporated in binder resins and (ii) a charge transport layer, wherein said charge generation layer comprises at least a first charge generating material dispersed in a first binder resin and a second charge generating material dispersed in a second binder resin, such that the binder resins in the charge generating layer are incompatible with each other.

    摘要翻译: 一种电子照相感光构件,其结构包括其上层压的导电基底,其具有(i)包含结合到粘合剂树脂中的两种或更多种电荷产生材料的电荷产生层和(ii)至少第一电荷产生材料的电荷输送层 分散在第一粘合剂树脂和分散在第二粘合剂树脂中的第二电荷产生材料,使得电荷产生层中的粘合剂树脂彼此不相容。

    Method for producing a light transmitting filter
    87.
    发明授权
    Method for producing a light transmitting filter 失效
    光透过滤器的制造方法

    公开(公告)号:US4803337A

    公开(公告)日:1989-02-07

    申请号:US125828

    申请日:1987-11-25

    摘要: A method for the preparation of an illuminance-correcting light transmitting filter employed in an exposure device adapted for the preparation of the phosphor screen of the color cathode ray tube. The laser light modulated with a light modulator is radiated to the surface of the filter base plate on which a thin layer of the recording material is previously formed. A pattern of through-holes of variable size or density is formed as the thin layer is vaporized so that the light transmitting filter may be prepared with high accuracy and in a shorter time. The laser light is modified with the light modulator, and the filter base plate is securely mounted to a movable stage, the movement of which in the X- and Y- directions is controlled under the commands of a computer unit.

    摘要翻译: 一种用于制备用于制备彩色阴极射线管的荧光屏的曝光装置中的照度校正透光滤光片的方法。 用光调制器调制的激光照射到预先形成有记录材料薄层的滤色器基板的表面。 当薄层蒸发时,形成可变尺寸或密度的通孔的图案,使得透光过滤器可以以高精度和更短的时间准备。 用光调制器修改激光,并且将滤光片底座牢固地安装到可移动台上,其运动在X和Y方向上以计算机单元的命令来控制。

    Cleaning device
    89.
    发明授权
    Cleaning device 失效
    清洁装置

    公开(公告)号:US4465362A

    公开(公告)日:1984-08-14

    申请号:US333884

    申请日:1981-12-23

    IPC分类号: G03G21/10 G03G21/00

    CPC分类号: G03G21/0029

    摘要: A cleaning device for removing any residual on an image bearing member has a cleaning member held in pressure contact with the surface of the image bearing member, and means for detecting the pressure contact condition of the cleaning member.

    摘要翻译: 用于去除图像承载部件上残留物的清洁装置具有与图像承载部件的表面保持压力接触的清洁部件,以及用于检测清洁部件的压力接触状态的装置。

    Semiconductor device
    90.
    发明授权
    Semiconductor device 有权
    半导体器件

    公开(公告)号:US09525023B2

    公开(公告)日:2016-12-20

    申请号:US13473643

    申请日:2012-05-17

    摘要: One embodiment of the present invention is a semiconductor device which includes a gate electrode; a gate insulating film formed to cover the gate electrode; a semiconductor layer formed over the gate insulating film and placed above the gate electrode; a second insulating film formed over the semiconductor layer; a first insulating film formed over a top surface and a side surface of the second insulating film, a side surface of the semiconductor layer, and the gate insulating film; silicon layers and which are formed over the first insulating film and electrically connected to the semiconductor layer; and a source electrode and a drain electrode which are formed over the silicon layers. The source electrode and the drain electrode are electrically separated from each other over the first insulating film. The semiconductor layer is not in contact with each of the source electrode and the drain electrode.

    摘要翻译: 本发明的一个实施例是包括栅电极的半导体器件; 形成为覆盖所述栅电极的栅极绝缘膜; 形成在所述栅极绝缘膜上并位于所述栅极电极上方的半导体层; 形成在所述半导体层上的第二绝缘膜; 形成在第二绝缘膜的顶表面和侧表面上的第一绝缘膜,半导体层的侧表面和栅极绝缘膜; 硅层,其形成在第一绝缘膜上并电连接到半导体层; 以及形成在硅层上的源电极和漏电极。 源电极和漏电极在第一绝缘膜上彼此电分离。 半导体层不与源电极和漏电极中的每一个接触。