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1. 发明授权

US07133448B2 Method and apparatus for rate control in moving picture video compression 有权
标题翻译：运动图像视频压缩中速率控制的方法和装置
公开(公告)号：US07133448B2
公开(公告)日：2006-11-07
申请号：US10289394
申请日：2002-11-07
申请人： Yung-Ching Chang , Jo-Tan Yao , Kuo-Ping Hsu
发明人： Yung-Ching Chang , Jo-Tan Yao , Kuo-Ping Hsu
IPC分类号： H04N7/12 , H04B1/66
CPC分类号： H04N19/115 , H04N19/14
摘要： A total activity measure for a current picture to be encoded in a set of consecutive pictures of a video sequence is calculated first. Based on the total activity measure of the current picture and an activity-to-complexity ratio of a previously encoded picture of the same type in the set of consecutive pictures, a complexity measure of the current picture is estimated. With the estimated complexity measure of the current picture, an instantaneous complexity measure for the set of consecutive pictures is updated. A target bit budget is allocated to the current picture depending on the estimated complexity measure and the instantaneous complexity measure. The current picture is encoded according to the target bit budget, and the activity-to-complexity ratio for the current picture is computed based on the total activity, actual bits consumed by the current picture, and the average quantization step size of the current picture.
摘要翻译：首先计算要在视频序列的一组连续图像中编码的当前图像的总活动度量。基于当前图像的总活动度量和连续图像集合中相同类型的先前编码图像的活动与复杂度比，估计当前图像的复杂度度量。利用当前图像的估计复杂度测量，更新该组连续图像的瞬时复杂度度量。目标比特预算根据估计的复杂度测量和即时复杂度测量分配给当前图片。根据目标比特预算对当前图像进行编码，并且基于当前图像的总活动度，实际比特消耗的当前图像的平均量化步长以及当前图像的平均量化步长来计算当前图像的活动与复杂度比。

2. 发明授权

US06847362B2 Fast line drawing method 有权
标题翻译：快速线绘图法
公开(公告)号：US06847362B2
公开(公告)日：2005-01-25
申请号：US10191159
申请日：2002-07-09
申请人： Chung-Yen Lu , Jo-Tan Yao
发明人： Chung-Yen Lu , Jo-Tan Yao
IPC分类号： G06T11/20
CPC分类号： G06T11/203
摘要： A fast line drawing method. First, the coordinates of two end points are received and a current point is assigned to one of the end points. The differences of x and y coordinates (Δx and Δy) and the sum of error E are computed, the integer part of Δx over Δy is denoted as Q. The current point is checked to determine whether it has reached the end point. If not and the value of E is negative, a point at the current point is drawn. The y-coordinate of the current point and E are updated by (Y+1) and (E−2Δx) respectively if E is non-negative, a span of pixels from (X,Y) to (X+Q−1,Y) are drawn if the coordinate of last of Q points is less than the end point. Otherwise, a span of pixels from (X,Y) to (x2,Y) are drawn.
摘要翻译：快速线条画法。首先，接收两个端点的坐标，并将一个当前点分配给一个端点。计算x和y坐标（Deltax和Deltay）的差异以及误差E的总和，Deltay上的Deltax的整数部分表示为Q.检查当前点以确定其是否已到达终点。如果不是，并且E的值为负，则绘制当前点的点。如果E是非负的，则分别由（Y + 1）和（E-2Deltax）更新当前点和E的y坐标，从（X，Y）到（X + Q-1，如果Q点的最后坐标小于终点，则绘制Y）。否则，绘制从（X，Y）到（x2，Y）的像素跨度。

3. 发明授权

US07254176B2 Apparatus for variable bit rate control in video compression and target bit allocator thereof 有权
标题翻译：用于视频压缩中的可变比特率控制及其目标比特分配器的装置
公开(公告)号：US07254176B2
公开(公告)日：2007-08-07
申请号：US10443804
申请日：2003-05-23
申请人： Yung-Ching Chang , Jo-Tan Yao , Kuo-Ping Hsu
发明人： Yung-Ching Chang , Jo-Tan Yao , Kuo-Ping Hsu
IPC分类号： H04N7/18
CPC分类号： H04N19/152 , H04N19/124 , H04N19/149 , H04N19/15 , H04N19/172 , H04N19/176 , H04N19/61
摘要： An apparatus for variable bit rate control in moving picture compression. First, a total activity measure for the current picture to be encoded in a set of consecutive pictures is calculated. Based on the total activity measure of the current picture and an activity-to-complexity ratio of a previously encoded picture of the same type in the set of consecutive pictures, a complexity measure of the current picture is estimated. A statistical complexity measure is then calculated from the complexity measure of the current picture. A target bit budget is allocated to the current picture depending on the instantaneous rate, the complexity measure and the instantaneous complexity measure. After encoding the current picture, the activity-to-complexity ratio for the current picture is computed based on the total activity measure, actual bits consumed by the current picture and an average of actual quantization step sizes used to encode the current picture.
摘要翻译：一种用于运动图像压缩中可变比特率控制的装置。首先，计算在一组连续图像中编码的当前图像的总活动度量。基于当前图像的总活动度量和连续图像集合中相同类型的先前编码图像的活动与复杂度比，估计当前图像的复杂度度量。然后从当前图片的复杂度测量中计算统计复杂度度量。目标比特预算根据瞬时速率，复杂度测量和瞬时复杂度测量分配给当前图像。在对当前画面进行编码之后，基于总活动度量，当前画面消耗的实际位数和用于编码当前画面的实际量化步长的平均值来计算当前画面的活动与复杂度比。

4. 发明授权

US5883984A Method and apparatus for contrast enhancement of color images 失效
标题翻译：彩色图像对比度增强的方法和装置
公开(公告)号：US5883984A
公开(公告)日：1999-03-16
申请号：US724892
申请日：1996-10-03
申请人： Ching-Mei Huang , Jo-Tan Yao , Hung-Ju Huang
发明人： Ching-Mei Huang , Jo-Tan Yao , Hung-Ju Huang
IPC分类号： G06T5/20 , H04N1/60 , G06K9/36
CPC分类号： H04N1/60 , G06T5/20
摘要： A method for contrast enhancement of pixel data of a decompressed color image includes the steps of computing I component values in an HSI color space for the pixel data of the color image, computing an image I component value which is an average of the computed I component values, and enhancing each of the pixel data of the color image according to the image I component value. An apparatus for contrast enhancement of pixel data of a decompressed color image is also disclosed.
摘要翻译：解压缩彩色图像的像素数据的对比度增强方法包括以下步骤：计算彩色图像的像素数据的HSI颜色空间中的I分量值，计算作为计算的I分量的平均值的图像I分量值值，并且根据图像I分量值增强彩色图像的每个像素数据。还公开了一种用于减压彩色图像的像素数据的对比度增强的装置。

5. 发明授权

US5748904A Method and system for segment encoded graphic data compression 失效
标题翻译：分段编码图形数据压缩的方法和系统
公开(公告)号：US5748904A
公开(公告)日：1998-05-05
申请号：US713598
申请日：1996-09-13
申请人： Hung-Ju Huang , Jo-Tan Yao , Chung-Heng Chen
发明人： Hung-Ju Huang , Jo-Tan Yao , Chung-Heng Chen
IPC分类号： G06T9/00 , G09G5/39 , G06F13/00
CPC分类号： G09G5/39 , G06T9/005 , G09G2340/02
摘要： A method and system for compressing graphic data by dividing the data into segments is disclosed. The size of the divided segment is programmable. A frame buffer partitioned into a compressed frame buffer and an uncompressed frame buffer stores graphic data. Each segment of the graphic data is compressed by three different algorithms that encode the graphic data as a plurality of code-words. Each code-word for the segment is taken from the algorithm that can compress the largest number of pixels in the code-word. A header is used to indicate the number of code-words and the compression method used in each code-word. The total number of bytes obtained from the compression of a segment is compared to a pre-defined limit to determine if the compression of the segment is successful. The successfully compressed data of a segment are written to the compressed frame buffer. A compression status flag buffer is used to identify if a segment is compressed or not. A decompressor decompresses or passes the graphic data to a pixel stream for display according to the compress status flag.
摘要翻译：公开了一种通过将数据划分成段来压缩图形数据的方法和系统。分段的大小是可编程的。分割成压缩帧缓冲器的帧缓冲器和未压缩帧缓冲器存储图形数据。图形数据的每个段通过将图形数据编码为多个代码字的三种不同的算法进行压缩。该段的每个码字取自可以压缩码字中最大像素数的算法。标题用于指示每个代码字中使用的代码字的数量和压缩方法。将从片段的压缩获得的字节总数与预定义的限制进行比较，以确定片段的压缩是否成功。一个段的成功压缩数据被写入压缩帧缓冲器。压缩状态标志缓冲器用于识别段是否被压缩。解压缩器根据压缩状态标志将图形数据解压缩或传递到像素流以进行显示。

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