Two-dimensional inverse discrete cosine transforming
    41.
    发明授权
    Two-dimensional inverse discrete cosine transforming 有权
    二维逆离散余弦变换

    公开(公告)号:US07292730B1

    公开(公告)日:2007-11-06

    申请号:US09458370

    申请日:1999-12-09

    IPC分类号: G06K9/36

    CPC分类号: G06F17/147

    摘要: Implementing a two-dimensional inverse discrete cosine transform function includes executing two one-dimensional inverse discrete cosine transforming functions. Each of the one-dimensional functions is controlled to operate on a matrix of coefficients in either of two different directions.

    摘要翻译: 实现二维逆离散余弦变换函数包括执行两个一维逆离散余弦变换函数。 每个一维功能被控制以在两个不同方向中的任一方向上的系数矩阵上操作。

    Obtaining a high refresh rate display using a low bandwidth digital interface
    43.
    发明授权
    Obtaining a high refresh rate display using a low bandwidth digital interface 有权
    使用低带宽数字接口获得高刷新率显示

    公开(公告)号:US06756996B2

    公开(公告)日:2004-06-29

    申请号:US09741566

    申请日:2000-12-19

    IPC分类号: G09G502

    CPC分类号: G09G5/006 G09G2310/04

    摘要: A sequence of input groups, each input group containing a number of input pixels, is received. A sequence of output frames is provided, where each output frame contains a number of output pixels to refresh a display screen. The pixels of each output frame include (1) a number of new pixels which are the input pixels of a respective input group, and (2) a number of old pixels which are the input pixels of a previous input group. The previous input group is one that's received previous to the respective input group.

    摘要翻译: 接收输入组的序列,每个输入组包含多个输入像素。 提供了一系列输出帧,其中每个输出帧包含多个输出像素以刷新显示屏幕。 每个输出帧的像素包括(1)作为相应输入组的输入像素的多个新像素,以及(2)作为先前输入组的输入像素的多个旧像素。 先前的输入组是在相应输入组之前接收的输入组。

    Black image detection circuitry
    44.
    发明授权
    Black image detection circuitry 失效
    黑色图像检测电路

    公开(公告)号:US5367339A

    公开(公告)日:1994-11-22

    申请号:US178459

    申请日:1994-01-06

    IPC分类号: H04N5/275 H04N9/75

    CPC分类号: H04N9/75 H04N5/275

    摘要: A chroma keying device is provided for switching between graphics images and video images. An input signal and a reference are compared to provide a switching signal for performing the switching between graphics and video. A switching signal is provided when the input signal color information indicates that the input signal represents a true black image. Thus, switching is triggered upon black in the chroma keying device of a present invention. The black level is determined when each of the red, blue and green inputs of the device receives substantially zero current. A very sensitive comparison is performed between these input lines and a reference voltage in order to detect this condition. In the chroma keying device of the present invention, this sensitive comparison is accomplished using matched diodes within a common integrated circuit.

    摘要翻译: 提供色度键控装置用于在图形图像和视频图像之间切换。 将输入信号和参考值进行比较以提供用于执行图形和视频之间的切换的切换信号。 当输入信号颜色信息指示输入信号表示真实黑色图像时,提供切换信号。 因此,本发明的色度键控装置中的黑色触发切换。 当设备的红色,蓝色和绿色输入中的每一个接收到基本为零的电流时,确定黑色电平。 为了检测这种情况,在这些输入线和参考电压之间进行非常敏感的比较。 在本发明的色度键控装置中,使用公共集成电路内的匹配二极管实现敏感比较。