Method and/or apparatus for implementing high dynamic range image processing in a video processing system
    1.
    发明授权
    Method and/or apparatus for implementing high dynamic range image processing in a video processing system 有权
    用于在视频处理系统中实现高动态范围图像处理的方法和/或装置

    公开(公告)号:US09204113B1

    公开(公告)日:2015-12-01

    申请号:US12824731

    申请日:2010-06-28

    摘要: An apparatus comprising a scaling circuit, a luma circuit and a blending circuit. The scaling circuit may generate a plurality of scaled frames in response to a first plurality of frames generated by a sensor. The first plurality of frames may have a first exposure. The luma circuit may generate an average luminance value for each of a plurality of processed pixels in each of a second of the plurality of frames generated by the sensor. The second of the plurality of frames may have a second exposure and each of the average luminance values is calculated based on a plurality of neighboring pixels in a neighborhood of the processed pixel.

    摘要翻译: 一种包括缩放电路,亮度电路和混合电路的装置。 响应于由传感器产生的第一多个帧,缩放电路可以生成多个缩放的帧。 第一多个帧可以具有第一曝光。 亮度电路可以生成由传感器生成的多个帧中的每个第二帧中的多个处理像素中的每一个的平均亮度值。 多个帧中的第二帧可以具有第二曝光,并且基于处理像素的附近的多个相邻像素来计算每个平均亮度值。

    Method and apparatus for scaling a compressed video bitstream
    2.
    发明授权
    Method and apparatus for scaling a compressed video bitstream 失效
    用于缩放压缩视频比特流的方法和装置

    公开(公告)号:US5889561A

    公开(公告)日:1999-03-30

    申请号:US334282

    申请日:1994-11-04

    摘要: A method and apparatus for scaling the bitstream of a compressed video signal includes partial decoding hardware (38, 41) to permit excising of higher frequency AC DCT coefficients or re-quantizing quantized data with a coarser quantization factor. The scaling is performed on a block (macroblock) basis in a manner which linearly scales the amount of compressed data per block. An analyzer (40) generates a profile of cumulative partially decompressed data over a video frame, and bitstream scaling (42) is performed in a manner which insures that a profile of the scaled signal substantially comports with the profile of the original data.

    摘要翻译: 用于缩放压缩视频信号的比特流的方法和装置包括部分解码硬件(38,41),以允许更高频AC DCT系数的切换或者用较粗略的量化因子重新量化量化的数据。 以块(宏块)为基础,以每个块的压缩数据的数量线性缩放的方式执行缩放。 分析器(40)通过视频帧生成累积部分解压缩数据的简档,并且以确保缩放信号的简档基本上与原始数据的简档相一致的方式执行比特流缩放(42)。

    Error concealment apparatus for video signal processors
    3.
    发明授权
    Error concealment apparatus for video signal processors 失效
    视频信号处理器的错误隐藏装置

    公开(公告)号:US5365604A

    公开(公告)日:1994-11-15

    申请号:US4358

    申请日:1993-01-14

    CPC分类号: H04N19/895

    摘要: Error concealment apparatus for correcting errors in signals representing video images includes means for detecting image gradients in an area surrounding a lost block of image data. Circuitry responsive to these image gradients generates a plurality of blocks of directionally interpolated pixel values. The pixel values in the respective blocks of directionally interpolated pixel values are sorted according to amplitude, and then pixel values from mutually exclusive positions in the respective blocks are selected to form a block of pixel values for error concealment.

    摘要翻译: 用于校正表示视频图像的信号中的错误的错误隐藏装置包括用于检测围绕丢失的图像数据块的区域中的图像梯度的装置。 响应于这些图像梯度的电路产生多个定向内插像素值的块。 根据幅度对定向插值像素值的各个块中的像素值进行排序,然后选择各个块中来自互斥位置的像素值,以形成用于错误隐藏的像素值块。

    Digital video camera with binning or skipping correction
    4.
    发明授权
    Digital video camera with binning or skipping correction 有权
    数码摄像机,具有合并或跳过校正功能

    公开(公告)号:US07893967B1

    公开(公告)日:2011-02-22

    申请号:US12249206

    申请日:2008-10-10

    IPC分类号: H04N5/228

    摘要: A method of generating video and a video camera are disclosed. The method generally includes the steps of (A) generating an input signal by sensing an optical signal using a plurality of first pixels, wherein (i) the sensing is capable of a pixel reduction by at least one of binning the first pixels and skipping some of the first pixels and (ii) a plurality of first spatial separations among the first pixels in the input signal are (a) uniform both horizontally and vertically while the pixel reduction is inactive and (b) non-uniform while the pixel reduction is active, (B) generating a plurality of second pixels in response to the first pixels such that a plurality of second spatial separations among the second pixels are uniform both horizontally and vertically while the pixel reduction is active and (C) generating an output signal carrying the second pixels.

    摘要翻译: 公开了一种产生视频和摄像机的方法。 该方法通常包括以下步骤:(A)通过使用多个第一像素感测光信号来产生输入信号,其中(i)感测能够通过将第一像素并置并跳过一些像素来减少像素 的第一像素和(ii)输入信号中的第一像素之间的多个第一空间分离是(a)水平和垂直均匀,而像素减少不活动,并且(b)在像素减少有效时不均匀 (B)响应于第一像素生成多个第二像素,使得第二像素之间的多个第二空间分隔水平和垂直均匀,而像素减小有效,并且(C)产生携带 第二个像素。

    Apparatus and method for selecting a coding mode in a block-based coding system
    6.
    发明授权
    Apparatus and method for selecting a coding mode in a block-based coding system 失效
    用于在基于块的编码系统中选择编码模式的装置和方法

    公开(公告)号:US06192081B1

    公开(公告)日:2001-02-20

    申请号:US09549244

    申请日:1995-10-26

    IPC分类号: H04N736

    摘要: An apparatus and concomitant method for selecting a macroblock coding mode based upon the quantization scale selected for the macroblock. The total number of bits needed to code each macroblock consists of two parts, bits needed for coding motion vectors and bits for coding the predictive residual. The number of bits for coding the motion vectors is generally obtained from a look-up table. The number of bits for coding the predictive residual is obtained by an estimation which assumes that the number of bits for encoding the predictive residuals is directly proportional to the value of its variance and inversely proportional to the value of quantizer steps (quantizer scale). Using this estimation, the total number of bits necessary to code a macroblock is calculated and compared for each coding mode. By selecting the coding mode with the least number of bits, a near-optimal solution of low complexity for practical implementation is acquired.

    摘要翻译: 一种用于基于为宏块选择的量化尺度来选择宏块编码模式的装置和并发方法。 编码每个宏块所需的总位数由两部分组成:编码运动矢量所需的位和用于编码预测残差的位。 用于编码运动矢量的比特数通常从查找表中获得。 用于对预测残差进行编码的比特数是通过估计假定用于编码预测残差的比特数与其方差的值成正比并与量化器步长(量化比例)成反比的方式获得的。 使用该估计,对于每个编码模式,计算并比较对宏块进行编码所需的总位数。 通过选择具有最少位数的编码模式,获得了用于实际实现的低复杂度的近似最优解。

    Temporal-spatial error concealment apparatus and method for video signal
processors
    8.
    发明授权
    Temporal-spatial error concealment apparatus and method for video signal processors 失效
    视频信号处理器的时空错误隐藏装置和方法

    公开(公告)号:US5621467A

    公开(公告)日:1997-04-15

    申请号:US389524

    申请日:1995-02-16

    CPC分类号: H04N19/895

    摘要: A video decompression system includes block error concealment means for generating substitute data for lost blocks of pixel data. An interpolator generates both spatially and temporally interpolated or predicted blocks of data for concealing a lost block. Pixel data in the respective blocks of spatially and interpolated data are transformed to coefficients representing frequency spectra. A substitute block of coefficients is assembled from coefficients from both the transformed blocks, according to a predetermined criteria. The substitute block is transformed back to the spatial domain for substitution of lost pixel values.

    摘要翻译: 视频解压缩系统包括块错误隐藏装置,用于生成丢失的像素数据块的替代数据。 内插器生成用于隐藏丢失块的空间和时间内插或预测数据块。 空间和内插数据的相应块中的像素数据被变换成表示频谱的系数。 系数的替代块根据预定标准从来自两个变换块的系数组装。 替代块被转换回空间域以替代丢失的像素值。

    Method and apparatus for providing scaleable compressed video signal
    9.
    发明授权
    Method and apparatus for providing scaleable compressed video signal 失效
    用于提供可缩放压缩视频信号的方法和装置

    公开(公告)号:US5387940A

    公开(公告)日:1995-02-07

    申请号:US088474

    申请日:1993-07-07

    摘要: A compression/decompression system includes a source of non-interlaced scanned video signal. A preprocessor constructs interlaced scanned video signal from the non-interlaced scanned video signal by selection of alternate lines of successive non-interlaced image signals. The interlaced scanned video signal is compressed according to known methods to generate primary compressed video data. The primary data is decompressed by known processes, inverse to the compression processes, to regenerate the interlaced scanned frames. Interlaced scanned video signal, corresponding to the intervening lines of the non-interlaced scanned video signal, which were not included in the primary interlaced scanned video signal, is predicted from the decompressed frames of video signal. In addition the intervening lines of the original non-interlaced scanned video signal, which were not included in the primary interlaced scanned video signal, are formed into secondary interlaced scanned video signal. The secondary video signal is subtracted from the predicted video signal to generate secondary field residues. These residues are compressed by known methods to form compressed secondary video data. The primary and secondary compressed data are thereafter transmitted for reception by either interlaced scanned receivers or non-interlaced scanned receivers.

    摘要翻译: 压缩/解压缩系统包括非隔行扫描视频信号源。 预处理器通过选择连续的非隔行图像信号的交替行来构造来自非隔行扫描视频信号的隔行扫描视频信号。 隔行扫描视频信号根据已知方法被压缩以产生主压缩视频数据。 通过与压缩过程相反的已知过程对主数据进行解压缩,以重新生成隔行扫描的帧。 根据视频信号的解压缩帧预测与未隔行扫描的视频信号中未包含的非隔行扫描视频信号的干涉行对应的隔行扫描视频信号。 此外,未包括在主隔行扫描视频信号中的原始非隔行扫描视频信号的中间线被形成为次级隔行扫描视频信号。 从预测的视频信号中减去辅助视频信号以产生次级场残留。 这些残留物通过已知方法压缩以形成压缩的次级视频数据。 此后,主要和次要压缩数据被隔行扫描的接收器或非隔行扫描的接收器发送以供接收。

    Digital video camera with binning or skipping correction

    公开(公告)号:US07982788B1

    公开(公告)日:2011-07-19

    申请号:US12181499

    申请日:2008-07-29

    IPC分类号: H04N5/335

    摘要: A method of generating video and a video camera are disclosed. The method generally includes the steps of (A) generating an input signal by sensing an optical signal using a plurality of first pixels, wherein (i) the sensing is capable of a pixel reduction by at least one of binning the first pixels and skipping some of the first pixels and (ii) a plurality of first spatial separations among the first pixels in the input signal are (a) uniform both horizontally and vertically while the pixel reduction is inactive and (b) non-uniform while the pixel reduction is active, (B) generating a plurality of second pixels in response to the first pixels such that a plurality of second spatial separations among the second pixels are uniform both horizontally and vertically while the pixel reduction is active and (C) generating an output signal carrying the second pixels.