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    • 1. 发明授权
    • Error resilient transcoding for video over wireless channels
    • 通过无线频道对视频进行弹性转码错误
    • US06339450B1
    • 2002-01-15
    • US09399689
    • 1999-09-21
    • Shih-Fu ChangJustin Che-I ChuangGustavo De Los ReyesAmy Ruth Reibman
    • Shih-Fu ChangJustin Che-I ChuangGustavo De Los ReyesAmy Ruth Reibman
    • H04N704
    • H04N19/40H04N19/107H04N19/147H04N19/164H04N19/89
    • A method and system for maintaining the quality of video transported over wireless channels uses a transcoder to modify and maintain the optical resilience of an encoded bitstream. The transcoder increases the spatial resilience by reducing the number of blocks per slice, and increases the temporal resilience by increasing the proportion of I-blocks that are transmitted in each frame. Also, the transcoder maintains the same input bit rate by dropping less significant coefficients as it increases resilience. The transcoder of the present invention maintains the resilience at an optimal level to accommodate the prevailing channel conditions as measured by the BER of the wireless channel. Rate distortion theory is applied to determine the optimal allocation of bit rate among spatial resilience, temporal resilience and source rate, where it is has been found that the optimal allocation of the present invention (which occurs in near-real time) provides nearly the same result as doing an exhaustive search.
    • 用于维持通过无线信道传输的视频的质量的方法和系统使用代码转换器来修改和维持编码比特流的光弹性。 代码转换器通过减少每个片段的块数来增加空间弹性,并且通过增加在每个帧中发送的I块的比例来增加时间弹性。 此外,代码转换器通过在增加复原力的同时降低较不重要的系数来维持相同的输入比特率。 本发明的代码转换器将弹性保持在最佳水平以适应由无线信道的BER测量的主要信道条件。 应用速率失真理论来确定空间弹性,时间弹性和源速率之间的比特率的最佳分配,其中已经发现本发明的最佳分配(以近实时发生)提供几乎相同的 结果是做一个详尽的搜索。
    • 3. 发明授权
    • Video concept classification using audio-visual atoms
    • 使用视听原子的视频概念分类
    • US08135221B2
    • 2012-03-13
    • US12574716
    • 2009-10-07
    • Wei JiangCourtenay CottonShih-Fu ChangDaniel P. EllisAlexander C. Loui
    • Wei JiangCourtenay CottonShih-Fu ChangDaniel P. EllisAlexander C. Loui
    • G06K9/62G06K9/54
    • G06K9/00765G10L25/00
    • A method for determining a classification for a video segment, comprising the steps of: breaking the video segment into a plurality of short-term video slices, each including a plurality of video frames and an audio signal; analyzing the video frames for each short-term video slice to form a plurality of region tracks; analyzing each region track to form a visual feature vector and a motion feature vector; analyzing the audio signal for each short-term video slice to determine an audio feature vector; forming a plurality of short-term audio-visual atoms for each short-term video slice by combining the visual feature vector and the motion feature vector for a particular region track with the corresponding audio feature vector; and using a classifier to determine a classification for the video segment responsive to the short-term audio-visual atoms.
    • 一种用于确定视频段的分类的方法,包括以下步骤:将视频段分解成多个短视频片段,每个短片段包括多个视频帧和音频信号; 分析每个短期视频片段的视频帧以形成多个区域轨道; 分析每个区域轨迹以形成视觉特征向量和运动特征向量; 分析每个短期视频片段的音频信号以确定音频特征向量; 通过将特定区域轨道的视觉特征向量和运动特征向量与相应的音频特征向量组合,形成每个短期视频片段的多个短期视听原子; 并且使用分类器来确定响应于短期视听原子的视频片段的分类。
    • 5. 发明授权
    • Image description system and method
    • 图像描述系统和方法
    • US07254285B1
    • 2007-08-07
    • US09831215
    • 1999-11-05
    • Seungup PaekAna BenitezShih-Fu ChangChung-Sheng LiJohn R. SmithLawrence D. BergmanAtul PuriQian Huang
    • Seungup PaekAna BenitezShih-Fu ChangChung-Sheng LiJohn R. SmithLawrence D. BergmanAtul PuriQian Huang
    • G06K9/60
    • G06K9/4685
    • Systems and methods for describing image content establish image description records which include an object set (24), an object hierarchy (26) and entity relation graphs (28). For image content, image objects can include global objects (O0 8) and local objects (O1 2 and O2 6). The image objects are further defined by a number of features of different classes (36, 38 and 40), which in turn are further defined by a number of feature descriptors. The relationships between and among the objects in the object set are defined by the object hierarchy (26) and entity relation graphs (28). The image description records provide a standard vehicle for describing the content and context of image information for subsequent access and processing by computer applications such as search engines, filters, and archive systems.
    • 用于描述图像内容的系统和方法建立包括对象集(24),对象层次(26)和实体关系图(28)的图像描述记录。 对于图像内容,图像对象可以包括全局对象(O 0 8)和本地对象(O 1 2和O 2 6)。 图像对象由不同类别(36,38和40)的许多特征进一步限定,这些特征又由许多特征描述符进一步限定。 对象集合中的对象之间和之间的关系由对象层次结构(26)和实体关系图(28)定义。 图像描述记录提供用于描述图像信息的内容和上下文的标准车辆,用于随后由计算机应用(例如搜索引擎,过滤器和归档系统)的访问和处理。
    • 6. 发明授权
    • Method and apparatus for watermarking images
    • 水印图像的方法和装置
    • US06879703B2
    • 2005-04-12
    • US10220776
    • 2002-01-10
    • Ching-Yung LinShih-Fu Chang
    • Ching-Yung LinShih-Fu Chang
    • G06T1/00H04N1/32G06K9/10
    • G06T1/0057G06T1/0042G06T1/005G06T2201/0052G06T2201/0061H04N1/32165H04N1/32187H04N1/32277H04N1/3232H04N2201/3236H04N2201/327
    • Digital watermarks are embedded in image data (102)in order to enable authentication of the image data and/or replacement of rejected portions of the image data. Authentication codes are derived by comparing selected discrete cosine transform (DCT) (104) coefficients within DCT data (106) derived from the original, spatial-domain image data. The authentication codes thus generated are embedded in DCT coefficients (612) other than the ones which were used to derive the authentication codes. The resulting, watermarked data can be sent or made available to one or more recipients who can compress or otherwise use the watermarked data. Image data derived from the watermarked data—e.g, compressed versions of the watermarked data—can be authenticated by: extracting the embedded authentication codes, comparing DCT coefficients derived from the coefficients from which the original authentication codes were generated; and determining whether the compared DCT coefficients are consistent with the extracted authentication codes.
    • 数字水印被嵌入在图像数据(102)中,以便能够对图像数据进行认证和/或替换图像数据的被拒绝的部分。 通过比较从原始的空间域图像数据导出的DCT数据(106)内的选定的离散余弦变换(DCT)(104)系数,导出认证码。 这样生成的认证码被嵌入除了用于导出认证码的那些之外的DCT系数(612)中。 所得到的水印数据可以被发送或使其可用于可压缩或以其他方式使用水印数据的一个或多个接收者。 从水印数据导出的图像数据(例如,水印数据的压缩版本)可以通过以下方式来认证:提取嵌入的认证码,比较从产生原始认证码的系数导出的DCT系数; 以及确定所述比较的DCT系数是否与所提取的认证码一致。
    • 10. 发明申请
    • MULTIMEDIA INTEGRATION DESCRIPTION SCHEME, METHOD AND SYSTEM FOR MPEG-7
    • 多媒体集成描述MPEG-7的方案和方法
    • US20090157736A1
    • 2009-06-18
    • US12372052
    • 2009-02-17
    • Ana Belen BenitezShih-Fu ChangQian HuangSeungyup PaekAtul Puri
    • Ana Belen BenitezShih-Fu ChangQian HuangSeungyup PaekAtul Puri
    • G06F17/30G06F15/16
    • G06F17/30044G06F17/3002G06F17/30038G06F17/30858G06F17/30914G06F17/30958Y10S707/99945Y10S707/99948
    • The invention provides a system and method for integrating multimedia descriptions in a way that allows humans, software components or devices to easily identify, represent, manage, retrieve, and categorize the multimedia content. In this manner, a user who may be interested in locating a specific piece of multimedia content from a database, Internet, or broadcast media, for example, may search for and find the multimedia content. In this regard, the invention provides a system and method that receives multimedia content and separates the multimedia content into separate components which are assigned to multimedia categories, such as image, video, audio, synthetic and text. Within each of the multimedia categories, the multimedia content is classified and descriptions of the multimedia content are generated. The descriptions are then formatted, integrated, using a multimedia integration description scheme, and the multimedia integration description is generated for the multimedia content. The multimedia description is then stored into a database. As a result, a user may query a search engine which then retrieves the multimedia content from the database whose integration description matches the query criteria specified by the user. The search engine can then provide the user a useful search result based on the multimedia integration description.
    • 本发明提供一种用于以允许人,软件组件或设备容易地识别,表示,管理,检索和分类多媒体内容的方式来集成多媒体描述的系统和方法。 以这种方式,例如,可能有兴趣从数据库,因特网或广播媒体定位特定的多媒体内容的用户可以搜索和查找多媒体内容。 在这方面,本发明提供了一种接收多媒体内容并将多媒体内容分离成分配给多媒体类别(诸如图像,视频,音频,合成和文本)的组件的系统和方法。 在多媒体类别的每一个内,对多媒体内容进行分类,并且生成多媒体内容的描述。 然后使用多媒体集成描述方案对所述描述进行格式化,集成化,并且为多媒体内容生成多媒体集成描述。 然后将多媒体描述存储到数据库中。 结果,用户可以查询搜索引擎,该搜索引擎然后从整合描述与用户指定的查询标准匹配的数据库中检索多媒体内容。 然后,搜索引擎可以基于多媒体整合描述向用户提供有用的搜索结果。