EFFICIENT MULTI-FRAME MOTION ESTIMATION FOR VIDEO COMPRESSION
    61.
    发明申请
    EFFICIENT MULTI-FRAME MOTION ESTIMATION FOR VIDEO COMPRESSION 审中-公开
    用于视频压缩的有效的多帧运动估计

    公开(公告)号:US20100215106A1

    公开(公告)日:2010-08-26

    申请号:US12775312

    申请日:2010-05-06

    IPC分类号: H04N7/12 G06K9/54

    CPC分类号: H04N19/573

    摘要: There is disclosed a method of digital signal compression, coding and representation, and more particularly a method of video compression, coding and representation system that uses multi-frame motion estimation and includes both device and method aspects. The invention also provides a computer program product, such as a recording medium, carrying program instructions readable by a computing device to cause the computing device to carry out a method according to the invention.

    摘要翻译: 公开了一种数字信号压缩,编码和表示的方法,特别是使用多帧运动估计的视频压缩,编码和表示系统的方法,包括设备和方法两个方面。 本发明还提供了诸如记录介质的计算机程序产品,其携带由计算设备可读的程序指令,以使计算设备执行根据本发明的方法。

    EFFICIENT RATE ALLOCATION FOR MULTI-RESOLUTION CODING OF DATA
    62.
    发明申请
    EFFICIENT RATE ALLOCATION FOR MULTI-RESOLUTION CODING OF DATA 有权
    数据的多分辨率编码的有效率分配

    公开(公告)号:US20100150463A1

    公开(公告)日:2010-06-17

    申请号:US12638225

    申请日:2009-12-15

    IPC分类号: G06K9/36

    摘要: There are disclosed three fast rate control methods that can efficiently reduce or remove the computation and memory usage redundancy over conventional PCRD methods. The first method, called successive bit-plane rate allocation (SBRA), assigns the maximum allowable bit-rate for each bit-plane of each code-block by using the currently available rate-distortion information only. The second method is called priority scanning rate allocation (PSRA). This first predicts the order of magnitude of each truncation point's rate-distortion slope and then encodes the truncation points based on the order (priority) information. The third method uses PSRA to obtain a significantly smaller amount of data than PCRD for optimal truncation and is called priority scanning with optimal truncation (PSOT). SBRA provides the highest computational complexity and memory usage reduction, and the lowest coding/transmission delay. The computational complexity reduction can be up to about 90% of the entropy coding process. However this method gives the lowest PSNR performance of the three. PSRA provides higher PSNR performance than SBRA with the penalty of lower memory usage reduction and higher delay. PSOT provides the best (optimal) quality while it is the least efficient method in term of computational complexity, memory usage and the coding/transmission delay. The three methods provide different degree of computation complexity and memory reduction, coding/transmission delay and PSNR performance. The most suitable rate control method can be chosen based on application requirements.

    摘要翻译: 已经公开了三种快速速率控制方法,其可以有效地减少或消除常规PCRD方法的计算和存储器使用冗余。 称为连续位平面速率分配(SBRA)的第一种方法仅通过使用当前可用的速率失真信息为每个码块的每个位平面分配最大允许比特率。 第二种方法称为优先扫描速率分配(PSRA)。 这首先预测每个截断点的速率 - 失真斜率的数量级,然后根据顺序(优先级)信息对截断点进行编码。 第三种方法使用PSRA获得比PCRD更少的数据量以获得最佳截断,并称为具有最佳截断(PSOT)的优先扫描。 SBRA提供了最高的计算复杂度和内存使用减少,以及最低的编码/传输延迟。 计算复杂度降低可高达熵编码过程的大约90%。 然而,这种方法给出了三种最低的PSNR性能。 PSRA提供比SBRA更高的PSNR性能,同时降低内存使用量的降低和更高的延迟。 PSOT提供最佳(最优)的质量,而在计算复杂度,内存使用和编码/传输延迟方面,PSOT是最不有效的方法。 这三种方法提供了不同程度的计算复杂度和内存缩减,编码/传输延迟和PSNR性能。 最合适的速率控制方法可以根据应用需求进行选择。

    Methods and apparatus for hiding data in halftone images
    63.
    发明授权
    Methods and apparatus for hiding data in halftone images 失效
    在半色调图像中隐藏数据的方法和装置

    公开(公告)号:US07697715B2

    公开(公告)日:2010-04-13

    申请号:US11233732

    申请日:2005-09-22

    IPC分类号: G06K9/00

    摘要: We propose methods for generating a halftone image, in which each pixel takes one of two tone values. The generated image contains hidden data, which is present at data storage pixels chosen using a pseudo-random number generator. In a first case, the data is hidden within an existing halftone image by reversing the tone value at certain of the data storage pixels, and at pixels neighbouring the data storage pixels. In a second case, the halftone image is generated from a grey-scale image, and data is hidden during this conversion process.

    摘要翻译: 我们提出了生成半色调图像的方法,其中每个像素采用两个色调值之一。 生成的图像包含存在于使用伪随机数生成器选择的数据存储像素处的隐藏数据。 在第一种情况下,通过反转某些数据存储像素处的色调值和与数据存储像素相邻的像素,将数据隐藏在现有的半色调图像内。 在第二种情况下,从灰度图像生成半色调图像,并且在该转换处理期间数据被隐藏。