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    • 2. 发明授权
    • Programmable transceivers that are able to operate over wide frequency ranges
    • 能够在宽频率范围内工作的可编程收发器
    • US07539278B2
    • 2009-05-26
    • US11292565
    • 2005-12-02
    • Sergey Yuryevich ShumarayevRakesh Patel
    • Sergey Yuryevich ShumarayevRakesh Patel
    • H03D3/24
    • H03K19/17744H03L7/0995
    • A field-programmable gate array (“FPGA”) may include data receiver and/or transmitter circuitry that is adapted to receive and/or transmit data at any frequency(ies) or data rate(s) in a wide range of possible frequencies or data rates. Phase-locked loop (PLL) circuitry may be needed for operation of such receiver and/or transmitter circuitry. For satisfactory operation over the wide frequency range, multiple PLL circuits are provided. One of these PLL circuits may be capable of operating over the entire frequency range, possibly with better jitter performance in some portions of the range than in other portions of the range. One or more other PLL circuits may be provided that are focused on particular parts of the broad range, especially where the jitter performance of the first-mentioned PLL may not be adequate to meet some possible needs.
    • 现场可编程门阵列(“FPGA”)可以包括数据接收器和/或发射机电路,其适于在宽范围的可能频率中以任何频率或数据速率接收和/或发射数据,或 数据速率。 可能需要锁相环(PLL)电路来操作这种接收器和/或发射器电路。 为了在宽频率范围内的令人满意的操作,提供了多个PLL电路。 这些PLL电路中的一个可能能够在整个频率范围内运行,可能在该范围的某些部分中具有比该范围的其他部分更好的抖动性能。 可以提供一个或多个其他PLL电路,其集中在宽范围的特定部分上,特别是在首先提到的PLL的抖动性能可能不足以满足一些可能需要的地方。
    • 9. 发明授权
    • Method of generating a blockiness indicator for a video signal
    • 产生视频信号的块效应指示符的方法
    • US09131213B2
    • 2015-09-08
    • US12203433
    • 2008-09-03
    • Jeff WeiRakesh Patel
    • Jeff WeiRakesh Patel
    • H04N7/26H04N17/00H04N19/86H04N19/17H04N19/82
    • H04N19/176H04N7/0155H04N17/004H04N19/167H04N19/17H04N19/182H04N19/66H04N19/82H04N19/86H04N19/865H04N19/88
    • The described embodiments relate to methods and systems for detecting the blockiness of a video signal comprised of a number of pixels. The method includes the steps of calculating a total number of pixels in the video signal in flat blocks and visible block edge transitions, and generating a blockiness indicator from the total number of pixels in flat blocks and visible block edge transitions. The step of calculating the total number of pixels in flat blocks and the total number of pixels in visible block edge transitions may include calculating differential values for each pixel in the video signal, analyzing the differential values to determine if the pixel is part of a transition and/or a flat area and then counting the number of pixels in flat blocks and visible block edge transitions to produce a total number of pixels in flat blocks and a total number of pixels in visible block edge transitions.
    • 所描述的实施例涉及用于检测包括多个像素的视频信号的块效应的方法和系统。 该方法包括以下步骤:在平面块和可见块边缘转换中计算视频信号中的像素总数,并从平面块和可见块边缘转换中的像素总数生成块状指示符。 计算平面块中的像素总数和可见块边缘转换中的像素总数的步骤可以包括计算视频信号中每个像素的差分值,分析差分值以确定像素是否是转变的一部分 和/或平坦区域,然后对平坦块和可见块边缘过渡中的像素数进行计数,以产生平坦块中的像素总数和可见块边缘转换中的像素总数。