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    • 1. 发明授权
    • Locating an audio source
    • 查找音频源
    • US06593956B1
    • 2003-07-15
    • US09079840
    • 1998-05-15
    • Steven L. PottsHong WangWendi Beth RabinerPeter L. Chu
    • Steven L. PottsHong WangWendi Beth RabinerPeter L. Chu
    • H04N714
    • G01S3/7865G01S3/8083H04N7/15
    • A system, such as a video conferencing system, is provided which includes an image pickup device, an audio pickup device, and an audio source locator. The image pickup device generates image signals representative of an image, while the audio pickup device generates audio signals representative of sound from an audio source, such as speaking person. The audio source locator processes the image signals and audio signals to determine a direction of the audio source relative to a reference point. The system can further determine a location of the audio source relative to the reference point. The reference point can be a camera. The system can use the direction or location information to frame a proper camera shot which would include the audio source.
    • 提供了诸如视频会议系统的系统,其包括图像拾取装置,音频拾取装置和音频源定位器。 图像拾取装置产生表示图像的图像信号,而音频拾取装置生成表示来自诸如说话人之类的音频源的声音的音频信号。 音频源定位器处理图像信号和音频信号以确定音频源相对于参考点的方向。 系统可以进一步确定音频源相对于参考点的位置。 参考点可以是相机。 该系统可以使用方向或位置信息来构成包括音频源的正确的相机拍摄。
    • 2. 发明授权
    • Motion-adaptive modelling of scene content for very low bit rate
model-assisted coding of video sequences
    • 视频序列的非常低比特率模型辅助编码的场景内容的运动自适应建模
    • US5764803A
    • 1998-06-09
    • US549994
    • 1996-04-03
    • Arnaud Eric JacquinWendi Beth Rabiner
    • Arnaud Eric JacquinWendi Beth Rabiner
    • G06T9/00H04N7/26H04N7/36H04N7/50G06K9/36
    • H04N19/527H04N19/126H04N19/154H04N19/17H04N19/196H04N19/503H04N19/61H04N19/124H04N19/20
    • A method and apparatus for video coding whereby a region of an image which includes a predetermined object such as a person's face in the foreground portion of the image is automatically determined. Specifically, the foreground portion of the image is identified, and one or more predetermined (geometric) shapes (e.g., ellipses) are compared with the shapes of objects found in the foreground portion of the image. The foreground portion of an image may be determined by performing a global motion estimation of the overall image to detect global image movement resulting, for example, from camera pan and zoom. That portion of the image whose movement is consistent with the estimated global motion may be identified as the background portion, with the remainder of the image identified as the foreground portion. The identified region of the image which includes the predetermined object and portions of the image which do not include the predetermined object may be coded with differing levels of coding accuracy (e.g., using different quantization levels), such that if the identified region contains, for example, a person's face, the quality of the coding of the face may be improved relative to the quality of the coding of other portions of the image.
    • 一种用于视频编码的方法和装置,其中自动确定在图像的前景部分中包括诸如人脸的预定对象的图像的区域。 具体地,识别图像的前景部分,并且将一个或多个预定(几何)形状(例如,椭圆)与在图像的前景部分中发现的对象的形状进行比较。 可以通过执行整个图像的全局运动估计来确定图像的前景部分,以检测例如从相机平移和缩放得到的全局图像运动。 其运动与估计的全局运动一致的图像的该部分可以被识别为背景部分,其中图像的其余部分被标识为前景部分。 包含预定对象的图像的识别区域和不包括预定对象的图像部分可以用不同编码精度(例如,使用不同的量化级别)进行编码,使得如果识别的区域包含 例如,人脸的面部的编码质量可以相对于图像的其他部分的编码质量而改善。