Block size assignment using local contrast ratio
    11.
    发明授权
    Block size assignment using local contrast ratio 有权
    使用局部对比度的块大小分配

    公开(公告)号:US06996283B2

    公开(公告)日:2006-02-07

    申请号:US10298030

    申请日:2002-11-15

    IPC分类号: G06K9/36 H04N1/415

    摘要: An apparatus and method for determining a block size assignment for a block of pixels is claimed. A mean for a given block of pixels and a neighborhood mean for adjacent blocks of pixels is determined. A contrast ratio is then determined, as a function of the mean and the neighborhood mean. A variance threshold is determined as a function of the contrast ratio. Then, various sub-block sizes within the block of pixels is determined as a function of the variance threshold. As such, a pixel block is considered in the context of adjacent pixel blocks rather than in isolation, which narrows the spread of block variances and allows for a more robust subdivision of pixel blocks.

    摘要翻译: 声明了一种用于确定像素块的块大小分配的装置和方法。 确定给定像素块的平均值和相邻像素块的邻域平均值。 然后确定对比度,作为平均值和邻域平均值的函数。 方差阈值被确定为对比度的函数。 然后,确定像素块内的各种子块尺寸作为方差阈值的函数。 因此,像素块在相邻像素块的上下文中被考虑,而不是孤立地考虑,其减小了块方差的扩展,并且允许像素块的更加鲁棒的细分。

    Configurable pattern optimizer
    12.
    发明授权
    Configurable pattern optimizer 有权
    可配置模式优化器

    公开(公告)号:US06870963B2

    公开(公告)日:2005-03-22

    申请号:US09882753

    申请日:2001-06-15

    摘要: An apparatus and method of serializing frequency based image data in a digital cinema system is described. At least one group of data that may be represented as a 16×16 block of data is compiled. Alternatively, a frame of data is compiled. The group of data is divided into four groups, each which may be represented as an 8×8 blocks. Each of the four 8×8 blocks of data are serialized using zig-zag scanning vertical scanning, and/or horizontal scanning.

    摘要翻译: 描述了在数字影院系统中串行化基于频率的图像数据的装置和方法。 编译可以表示为16×16数据块的至少一组数据。 或者,编译一帧数据。 该组数据被分成四组,每组可以表示为8×8块。 四个8×8数据块中的每一个都使用锯齿形扫描垂直扫描和/或水平扫描进行串行化。

    System and method for decoding digital image and audio data in a lossless manner
    13.
    发明授权
    System and method for decoding digital image and audio data in a lossless manner 有权
    以无损耗方式解码数字图像和音频数据的系统和方法

    公开(公告)号:US07630563B2

    公开(公告)日:2009-12-08

    申请号:US10199899

    申请日:2002-07-18

    IPC分类号: G06K9/36

    摘要: A method of losslessly decoding signals representing an image is claimed. A lossy compressed data file and a residual compressed data file are received. The lossy compressed data file is separated into DC coefficients and AC coefficients, and decoded, separately, to the determine DC values and the AC values. The DC values and the AC values are inverse quantized to produce lossy, decompressed data. The residual compressed data file is decoded to produce a residual decompressed data. The lossy decompressed frequency data is combined with the residual decompressed data to produce a lossless data file, wherein the lossless data file is substantially the same as the original image.

    摘要翻译: 声称对代表图像的信号进行无损译码的方法。 收到有损压缩数据文件和残留压缩数据文件。 有损压缩数据文件被分成DC系数和AC系数,分别解码为确定的DC值和AC值。 DC值和AC值被逆量化以产生有损耗的解压缩数据。 残余压缩数据文件被解码以产生残余解压缩数据。 有损解压缩频率数据与剩余解压缩数据组合以产生无损数据文件,其中无损数据文件与原始图像基本相同。

    Apparatus and method for watermarking a digital image
    14.
    发明授权
    Apparatus and method for watermarking a digital image 有权
    用于对数字图像进行水印的装置和方法

    公开(公告)号:US07376243B2

    公开(公告)日:2008-05-20

    申请号:US11341098

    申请日:2006-01-27

    IPC分类号: G06K9/00

    摘要: An apparatus for adding a watermark to a moving image as it is displayed comprises a watermark generator in which data representing a watermark is generated. The watermark contains at least one of location data and time data pertaining to the displaying of the moving image. The location and time data is protected by forward error encoding. The watermark also contains at least one of program data identifying the moving image and frame data unique in identifying each frame of the moving image. The program and time data is protected by scrambling. A watermark applicator applies the watermark data to image data representing substantially all of the moving image depending on a characteristic, such as amplitude, of the data.

    摘要翻译: 一种用于在运动图像显示时添加水印的装置包括其中生成表示水印的数据的水印生成器。 水印包含与运动图像的显示相关的位置数据和时间数据中的至少一个。 位置和时间数据由前向错误编码保护。 水印还包含标识运动图像的程序数据和识别运动图像的每个帧中唯一的帧数据中的至少一个。 程序和时间数据通过加扰来保护。 水印应用程序将水印数据应用于表示基本上所有运动图像的图像数据,这取决于诸如数据的幅度的特性。

    DCT compression using Golomb-Rice coding
    16.
    发明授权
    DCT compression using Golomb-Rice coding 有权
    使用Golomb-Rice编码进行DCT压缩

    公开(公告)号:US07031390B2

    公开(公告)日:2006-04-18

    申请号:US10768844

    申请日:2004-01-29

    IPC分类号: H04N7/12

    摘要: An apparatus and method to encode the run-lengths and amplitude of the quantized DCT coefficients in a lossless manner is used to achieve compression. Specifically, Golomb-Rice coding is used to encode both zero runs and non-zero amplitudes of the DCT coefficients after quantization. It is found that the use of a scheme taking advantage of an exponential distribution of data, such as Golomb-Rice coding, allows for higher coding efficiencies than alternate schemes.

    摘要翻译: 使用以无损方式对量化DCT系数的游程长度和振幅进行编码的装置和方法来实现压缩。 具体来说,Golomb-Rice编码用于在量化后对DCT系数的零运行和非零幅度进行编码。 发现利用数据的指数分布(如Golomb-Rice编码)的方案的使用允许比替代方案更高的编码效率。

    Lossless intraframe encoding using Golomb-Rice
    17.
    发明授权
    Lossless intraframe encoding using Golomb-Rice 有权
    使用Golomb-Rice进行无损帧内编码

    公开(公告)号:US06650784B2

    公开(公告)日:2003-11-18

    申请号:US09898284

    申请日:2001-07-02

    IPC分类号: G06K936

    摘要: An apparatus and method of intraframe encoding of digital frequency-domain data. The data comprises a plurality of slices each having a plurality of blocks. Each block has a DC component and a plurality of AC components. A first DC component value of each slice is encoded. Each subsequent DC component value of each slice is represented as the difference between it and the DC component value preceeding it. For lossless encoding, the initial DC component value of each slice and the differences are encoding using Golomb-Rice.

    摘要翻译: 数字频域数据的帧内编码的装置和方法。 数据包括多个片,每片具有多个块。 每个块具有DC分量和多个AC分量。 每个切片的第一个DC分量值被编码。 每个切片的每个随后的DC分量值被表示为它与之前的DC分量值之间的差。 对于无损编码,每个切片的初始DC分量值和差异是使用Golomb-Rice进行编码。