公开(公告)号：US5928313A

公开(公告)日：1999-07-27

申请号：US841891

申请日：1997-05-05

申请人： Laurence A. Thompson

发明人： Laurence A. Thompson

IPC分类号： G06T3/40 ,  G06F17/17 ,  G06F17/10

CPC分类号： G06T3/4023

摘要： An improved apparatus and method for performing sample rate conversion of digital sample values is disclosed. The sample rate conversion utilizes a finite impulse response filter that substantially eliminates the introduction of phase errors that plague conventional approaches. The computations required to implement the finite impulse response filter are provided in a hardware implementation that is efficiently constructed and utilized so as to be practical to implement in hardware as well as being fast enough to process the incoming samples in essentially real time. The digital sample values being processed by the invention can, for example, be audio, video or graphics related digital sample values. The sample rate conversion is suitable for scaling the size of the images (graphical or video) along one or more axes, or for time compression or expansion of an audio streaming rate.

摘要翻译： 公开了一种用于执行数字样本值的采样率转换的改进的装置和方法。 采样率转换采用有限的脉冲响应滤波器，基本上消除了引入常规方法的相位误差。 实现有限脉冲响应滤波器所需的计算在有效构造和利用的硬件实现中提供，以便在硬件中实现并且足够快以基本上实时地处理输入的采样。 由本发明处理的数字样本值例如可以是音频，视频或图形相关的数字样本值。 采样率转换适用于沿着一个或多个轴缩放图像（图形或视频）的大小，或用于音频流速率的时间压缩或扩展。

公开(公告)号：US5065143A

公开(公告)日：1991-11-12

申请号：US649606

申请日：1991-02-01

申请人： Paul E. Greaves ,  Michael R. Moore ,  Stephen G. Perlman ,  Laurence A. Thompson

发明人： Paul E. Greaves ,  Michael R. Moore ,  Stephen G. Perlman ,  Laurence A. Thompson

IPC分类号： G09G1/16 ,  G09G1/28 ,  H04N9/64

CPC分类号： H04N9/641 ,  G09G1/16 ,  G09G1/285 ,  G09G2340/12

摘要： A circuit for converting RGB to composite video. The circuit is particularly useful in a video overlay application. Notch filters are used both in the video path and keying path. The notch filters are centered at frequencies equal to the dot clock frequency of the RGB divided by integers where the result of this division falls within the chroma subcarrier spectrum.

摘要翻译： 用于将RGB转换为复合视频的电路。 该电路在视频覆盖应用中特别有用。 在视频路径和键控路径中都使用陷波滤波器。 陷波滤波器以等于RGB除以整数的点时钟频率的频率为中心，其中该分频的结果落在色子载波频谱内。

公开(公告)号：US20130322778A1

公开(公告)日：2013-12-05

申请号：US13899222

申请日：2013-05-21

申请人： Dale Richard Adams ,  Laurence A. Thompson

发明人： Dale Richard Adams ,  Laurence A. Thompson

IPC分类号： G06T5/10

CPC分类号： G06T5/10 ,  G06T5/002 ,  G11B20/00007 ,  H04N19/117 ,  H04N19/136 ,  H04N19/865

摘要： Systems and methods for block noise detection and filtering are disclosed. One embodiment includes, computing difference magnitudes in pixel values for adjacent pixels in the image. The difference magnitudes can include horizontal difference magnitudes for horizontally adjacent pixels and vertical difference magnitudes for vertically adjacent pixels. One embodiment further includes using normalized sums of the difference magnitudes to determine a set of noise characteristics of the block noise and a set of image characteristics of the image and configuring inputs to the block noise filter using the set of noise and image characteristics.

摘要翻译： 公开了用于块噪声检测和滤波的系统和方法。 一个实施例包括：计算图像中相邻像素的像素值中的差异幅度。 差异幅度可以包括水平相邻像素的水平差幅度和垂直相邻像素的垂直差幅度。 一个实施例还包括使用差分幅度的归一化和来确定块噪声的一组噪声特性和图像的一组图像特性，并且使用该组噪声和图像特性来配置对块噪声滤波器的输入。

公开(公告)号：US20130162901A1

公开(公告)日：2013-06-27

申请号：US13335398

申请日：2011-12-22

申请人： Laurence A. Thompson

发明人： Laurence A. Thompson

IPC分类号： H04N7/01

CPC分类号： H04N7/01 ,  G06T3/4007 ,  H04N7/0117 ,  H04N7/0135

摘要： Embodiments are generally directed to ringing suppression in video scalers. An embodiment of a method includes receiving a stream of video data, received video data including sets of video data values, and storing a first set of video data values in a memory. A first set of scaled values for the set of video data values is determined based on a scaling technology, and a second set based on linear interpolation. The method includes detecting rate of change in amplitude for received video data, generating a mixing control signal based at least in part on the rate of change, mixing first set of scaled values and second set of scaled values based at least in part on mixing control signal to generate blended set of coefficients, and generating scaled video data output using the set of blended values.

摘要翻译： 实施例通常涉及视频缩放器中的振铃抑制。 一种方法的实施例包括接收视频数据流，包括视频数据值集合的接收视频数据，以及将第一组视频数据值存储在存储器中。 基于缩放技术确定该组视频数据值的第一组缩放值，并且基于线性插值确定第二组。 该方法包括检测接收到的视频数据的振幅变化率，至少部分地根据变化率产生混合控制信号，混合第一组缩放值和第二组缩放值，至少部分地基于混合控制 信号以产生混合的系数集合，以及使用该混合值集合生成缩放视频数据输出。

公开(公告)号：US06587158B1

公开(公告)日：2003-07-01

申请号：US09359530

申请日：1999-07-22

申请人： Dale R. Adams ,  Laurence A. Thompson ,  Jano D. Banks

发明人： Dale R. Adams ,  Laurence A. Thompson ,  Jano D. Banks

IPC分类号： H04N964

CPC分类号： H04N7/012 ,  G09G2310/0229 ,  H04N5/14 ,  H04N5/4401 ,  H04N5/66 ,  H04N5/775 ,  H04N5/85 ,  H04N7/0112 ,  H04N9/8042

摘要： A digital image processor includes an input buffer for storing raster-scanned data. A slice-buffer memory is coupled to the input buffer to store a portion of a vertical slice of said raster-scanned data. The vertical slice is processed by a vertical slice processor having an input coupled to the slice-buffer memory. The vertical slice processor reassembles the vertical slices into processed raster-scanned data in an output buffer that is coupled to the output of the vertical slice processor. The digital image processor preferably utilizes multiple sequential processing stages and processes the raster-scanned data along the horizontal axis of the vertical slices.

摘要翻译： 数字图像处理器包括用于存储光栅扫描数据的输入缓冲器。 切片缓冲存储器耦合到输入缓冲器以存储所述光栅扫描数据的垂直切片的一部分。 垂直切片由具有耦合到切片缓冲存储器的输入的垂直切片处理器处理。 垂直切片处理器将垂直切片重新组合成耦合到垂直切片处理器的输出的输出缓冲器中的经处理的光栅扫描数据。 数字图像处理器优选地利用多个顺序处理阶段并且沿着垂直切片的水平轴处理光栅扫描数据。

公开(公告)号：US06380978B1

公开(公告)日：2002-04-30

申请号：US09167527

申请日：1998-10-06

申请人： Dale R. Adams ,  Laurence A. Thompson ,  Jano D. Banks ,  David C. Buuck ,  Cheng Hwee Chee

发明人： Dale R. Adams ,  Laurence A. Thompson ,  Jano D. Banks ,  David C. Buuck ,  Cheng Hwee Chee

IPC分类号： H04N701

CPC分类号： G11B33/10 ,  G06F1/16 ,  G06F2200/1631 ,  G06T3/40 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10016 ,  G09G5/39 ,  G09G5/393 ,  G09G2310/0229 ,  G11B33/025 ,  H04N5/14 ,  H04N5/147 ,  H04N5/4401 ,  H04N5/66 ,  H04N5/775 ,  H04N5/85 ,  H04N7/0112 ,  H04N7/012 ,  H04N9/8042

摘要： A digital image enhancer includes a deinterlacing processor receptive to an interlaced video stream. The deinterlacing processor includes a first deinterlacer and a second deinterlacer and provides a deinterlaced video stream. The digital image enhancer also includes a video output processor receptive to the output of the deinterlaced video stream to provide a scaled, deinterlaced video stream. A portable DVD player including the digital video enhancer has a generally thin prismatic enclosure having a first major surface, a second major surface separated from said first major surface, and side surfaces connecting the first major surface to the second major surface. At least a portion of the first major surface includes a video display, and the enclosure includes a DVD entry port such that a DVD can be inserted into the enclosure.