公开(公告)号：US20060285594A1

公开(公告)日：2006-12-21

申请号：US11158548

申请日：2005-06-21

Applicant: Changick Kim ,  William Chen ,  Vasudev Bhaskaran

Inventor： Changick Kim ,  William Chen ,  Vasudev Bhaskaran

IPC: H04N11/02 ,  H04N7/12 ,  H04N11/04 ,  H04B1/66

CPC classification number: H04N19/132 ,  H04N19/109 ,  H04N19/147 ,  H04N19/176 ,  H04N19/51

Abstract: An inter-mode for encoding a video macroblock is selected based on a comparison of at least two rate-distortion values associated with inter-modes. The number of potential inter-modes for encoding the video macroblock is initially reduced based on the rate-distortion calculation of the SKIP mode between the current macroblock and the collocated macroblock (corresponding to a 0,0 motion vector). Motion estimation is performed on the remaining inter-modes to identify reference blocks and motion vectors. The number of calculations performed in identifying the reference blocks and motion vectors is potentially reduced because associations between inter-modes are recognized and leveraged.

Abstract translation: 基于与模式相关联的至少两个速率 - 失真值的比较来选择用于编码视频宏块的帧间模式。 基于当前宏块和并置宏块（对应于0,0运动矢量）之间的SKIP模式的速率失真计算，初始地减少用于编码视频宏块的潜在的模式的数量。 对剩余的帧间模式执行运动估计，以识别参考块和运动矢量。 在识别参考块和运动矢量时执行的计算次数可能会被减少，因为识别和利用了各种模式之间的关联。

公开(公告)号：US20060206775A1

公开(公告)日：2006-09-14

申请号：US11077102

申请日：2005-03-10

Applicant: Vasudev Bhaskaran

Inventor： Vasudev Bhaskaran

IPC: H03M13/00

CPC classification number: H04N19/117 ,  H04N19/156 ,  H04N19/172 ,  H04N19/196 ,  H04N19/46 ,  H04N19/895

Abstract: Improved error resiliency of an encoding device, such as a video codec or encoder, operating in a compressed data transmission system, is achieved by enabling the encoding device to “shadow” or mimic the error conditions of a decoding device that receives and decodes compressed data sent by the encoding device. The encoding device is made aware of the specific error concealment scheme that the decoding device employs to reconstruct video frame data from a bit stream that contains bit or packet errors, and is also made aware of the location(s) in the frame to which the erroneous data corresponds and the particular manner in which the erroneous data was handled. The error-concealed data then can be used not only for the present encoding, but for subsequent encodings as well, to achieve synchronization between the encoder and decoder. Advantageously, the present invention improves on, but can work with, conventional error concealment schemes.

Abstract translation: 通过使编码设备能够“阴影”或模拟接收和解码压缩数据的解码设备的错误条件，来实现在压缩数据传输系统中操作的编码设备（例如视频编解码器或编码器）的改进的错误弹性 由编码设备发送。 使编码装置知道解码装置用于从包含位或分组错误的比特流重建视频帧数据的特定错误隐藏方案，并且还使得知道该帧中的位置 错误的数据对应以及处理错误数据的特定方式。 错误隐藏的数据不仅可以用于当前编码，而且可以用于后续编码，以实现编码器和解码器之间的同步。 有利地，本发明改进了传统的错误隐藏方案，但是可以适用于常规的错误隐藏方案。

公开(公告)号：US20050167505A1

公开(公告)日：2005-08-04

申请号：US10932193

申请日：2004-09-01

Applicant: Changick Kim ,  Vasudev Bhaskaran ,  Joseph Shu

Inventor： Changick Kim ,  Vasudev Bhaskaran ,  Joseph Shu

IPC: G06T1/00 ,  G06K1/12 ,  G06K7/14 ,  H04N1/387 ,  G06K9/18 ,  G06K7/12 ,  G06K19/06

CPC classification number: G06K15/00 ,  G06K1/121 ,  G06K7/14

Abstract: A 3-D dot code is embedded in a printed medium using an embedder that embeds data directly into the halftone dots of a selected file that is ready for printing. An extractor extracts the embedded bits by scanning the printed medium and then interprets the embedded data. A bleed-through elimination module in the extractor is able to eliminate adverse affects on the scanned input of the embedded data caused by bleed-through from the print on the opposite side of the page. The extractor may also include a module that compensates for a misaligned scanned input by automatically detecting the rotation and translation, and then registering the image so that the upper-left corner is located in a certain position. This operation expedites subsequent data retrieval, in which data is read by block matching.

Abstract translation: 使用嵌入器将3-D点代码嵌入到打印介质中，嵌入器将数据直接嵌入到准备打印的所选文件的半色调点中。 提取器通过扫描打印介质提取嵌入的位，然后解释嵌入的数据。 提取器中的渗透消除模块能够消除由页面相对侧的打印引起的渗透引起的嵌入数据的扫描输入的不利影响。 提取器还可以包括通过自动检测旋转和平移来补偿未对准的扫描输入，然后注册图像使得左上角位于特定位置的模块。 该操作加快后续数据检索，数据通过块匹配读取。

公开(公告)号：US20050094899A1

公开(公告)日：2005-05-05

申请号：US10696472

申请日：2003-10-29

Applicant: Changick Kim ,  Jincheng Huang ,  Vasudev Bhaskaran

Inventor： Changick Kim ,  Jincheng Huang ,  Vasudev Bhaskaran

IPC: G06T3/40 ,  G06K9/32 ,  H04N1/393

CPC classification number: G06T3/4007 ,  G06T3/403

Abstract: A method for upscaling image data is provided. The method initiates with identifying a gradient value associated with a pixel location of the image data. Then, it is determined whether a direction associated with the pixel location is either a horizontal direction or a vertical direction. Next, a weighted interpolation scheme is applied to the pixel location when the direction is either a horizontal direction or a vertical direction. A method for applying an interpolation scheme where inter-frame redundancies are exploited is included. A computer readable media, a system for processing block based image data and an integrated circuit for scaling image data are also provided.

Abstract translation: 提供了一种用于放大图像数据的方法。 该方法通过识别与图像数据的像素位置相关联的梯度值来启动。 然后，确定与像素位置相关联的方向是水平方向还是垂直方向。 接下来，当方向是水平方向或垂直方向时，将加权内插方案应用于像素位置。 包括利用帧间冗余的内插方案的方法。 还提供了计算机可读介质，用于处理基于块的图像数据的系统和用于缩放图像数据的集成电路。

公开(公告)号：US20050063475A1

公开(公告)日：2005-03-24

申请号：US10666668

申请日：2003-09-19

Applicant: Vasudev Bhaskaran

Inventor： Vasudev Bhaskaran

IPC: H04N7/12 ,  H04N7/26

CPC classification number: H04N19/136 ,  H04N19/117 ,  H04N19/176

Abstract: A method for adaptively filtering a video signal prior to encoding is provided. The method initiates with calculating a local gradient indicative of a region type. Then, a weight factor is determined based upon the local gradient. Next, the weight factor is applied to a difference signal according to the region type. A computer readable media, an integrated circuit and a system for processing an image data signal are also provided.

Abstract translation: 提供了一种在编码之前对视频信号进行自适应滤波的方法。 该方法通过计算指示区域类型的局部梯度来启动。 然后，基于局部梯度来确定权重因子。 接下来，根据区域类型将权重因子应用于差分信号。 还提供了计算机可读介质，集成电路和用于处理图像数据信号的系统。

公开(公告)号：US5850484A

公开(公告)日：1998-12-15

申请号：US940695

申请日：1997-09-30

Applicant: Giordano Beretta ,  Vasudev Bhaskaran ,  Konstantinos Konstantinides

Inventor： Giordano Beretta ,  Vasudev Bhaskaran ,  Konstantinos Konstantinides

IPC: H04N11/04 ,  G06T9/00 ,  H03M7/30 ,  H04N1/41 ,  H04N7/26 ,  H04N7/30 ,  G06K9/36

CPC classification number: H04N19/126 ,  H04N19/60 ,  H04N19/124

Abstract: The text and image enhancing technique according to the invention is integrated into the decoding or inverse quantization step that is necessarily required by the JPEG standard. The invention integrates the two by using two different quantization tables: a first quantization table (Q.sub.E) for use in quantizing the image data during the compression step and a second quantization table used during the decode or inverse quantization during the decompression process. The second quantization table Q.sub.D is related to the first quantization table according to a predetermined function of the energy in a reference image and the energy in a scanned image. The energy of the reference image lost during the scanning process, as represented by the energy in the scanned image, is restored during the decompression process by appropriately scaling the second quantization table according to the predetermined function. The difference between the two tables, in particular the ratio of the two tables, determines the amount of image enhancing that is done in the two steps. By integrating the image enhancing and inverse quantization steps the method does not require any additional computations than already required for the compression and decompression processes.

Abstract translation: 根据本发明的文本和图像增强技术被集成到JPEG标准必然要求的解码或逆量化步骤中。 本发明通过使用两个不同的量化表来整合两者：用于在压缩步骤期间量化图像数据的第一量化表（QE）和在解压缩处理期间在解码或逆量化期间使用的第二量化表。 第二量化表QD根据参考图像中的能量的预定函数和扫描图像中的能量与第一量化表相关。 在扫描过程中由扫描图像中的能量表示的参考图像的能量在解压缩处理期间通过根据预定函数适当缩放第二量化表来恢复。 两个表之间的差异，特别是两个表的比率决定了在两个步骤中完成的图像增强量。 通过集成图像增强和逆量化步骤，该方法不需要比压缩和解压缩过程已经需要的任何额外的计算。