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1. 发明授权

US06407762B2 Camera-based interface to a virtual reality application 失效
标题翻译：基于摄像头的虚拟现实应用界面
公开(公告)号：US06407762B2
公开(公告)日：2002-06-18
申请号：US08829107
申请日：1997-03-31
申请人： Mark Leavy
发明人： Mark Leavy
IPC分类号： G06T700
CPC分类号： G06F3/017 , A63F2300/1093 , G06F3/012
摘要： A method and an apparatus for navigating and manipulating a virtual object in a virtual space using a digital camera as an input device are described. The method comprises the following steps. A plurality of video frames are received and analyzed by a video data analyzer to determine whether a predetermined set of data is present. The predetermined set of data includes several variables. First, whether a person is present in the video frame. Second, if a person is present, then whether the person's head is visible in the video frame. If the person's head is visible, then the position of the person's head in 3-D space is determined and recorded. Finally, the orientation of the person's head in 3-D space is also determined. The third variable is to determine whether a hand or hands are visible. If a hand is visible, the position of the hand in 3-D space is determined and recorded. The orientation of the hand in 3-D space is then determined and recorded. Finally, the state of the hand, whether it is open or closed, is determined and recorded. Information related to these three variables provides most of the information needed by a user to navigate through the virtual space and/or to manipulate a virtual object in the virtual space. The recognition of these three variables is obtained using well-known pattern recognition algorithms.
摘要翻译：描述使用数字照相机作为输入设备来导航和操纵虚拟空间中的虚拟对象的方法和装置。该方法包括以下步骤。多个视频帧由视频数据分析器接收和分析，以确定是否存在预定数据集。预定的数据集包括几个变量。首先，一个人是否存在于视频帧中。第二，如果一个人在场，那么该人的头部是否在视频帧中可见。如果人的头部可见，则确定并记录人头在三维空间中的位置。最后，还决定了三维空间中人头的方向。第三个变量是确定手或手是否可见。如果手可见，则确定并记录手在3-D空间中的位置。然后确定并记录手在3-D空间中的方向。最后，确定和记录手的状态，无论是开放还是关闭。与这三个变量相关的信息提供了用户在虚拟空间中导航和/或操纵虚拟空间中的虚拟对象所需的大部分信息。使用众所周知的模式识别算法获得这三个变量的识别。

2. 发明授权

US5928311A Method and apparatus for constructing a digital filter 失效
标题翻译：用于构建数字滤波器的方法和装置
公开(公告)号：US5928311A
公开(公告)日：1999-07-27
申请号：US710270
申请日：1996-09-13
申请人： Mark Leavy , Albert Shen
发明人： Mark Leavy , Albert Shen
IPC分类号： H03H17/02 , G06F17/10
CPC分类号： H03H17/02
摘要： A method and apparatus for constructing a digital filter from a set of data is described. The method comprises the following steps. A plurality of magnitude components of the set of data is encoded. A plurality of phase components of the set of data is encoded. The plurality of encoded magnitude components and encoded phase components are stored in a memory. The digital filter is constructed using the encoded magnitude components and encoded phase components from the memory.
摘要翻译：描述了从一组数据构建数字滤波器的方法和装置。该方法包括以下步骤。该组数据的多个幅度分量被编码。对该组数据的多个相位分量进行编码。多个编码的幅度分量和编码的相位分量被存储在存储器中。数字滤波器使用来自存储器的编码幅度分量和编码相位分量来构造。

3. 发明授权

US5608651A Method and apparatus for scheduling and mixing media in a multi-media environment 失效
标题翻译：在多媒体环境中调度和混合媒体的方法和装置
公开(公告)号：US5608651A
公开(公告)日：1997-03-04
申请号：US381212
申请日：1995-01-31
申请人： Mark Leavy , Murali Veeramoney , Michael D. Rosenzweig , Scott D. Boss , Roger Hurwitz , Bob Davies , Daniel R. Cox
发明人： Mark Leavy , Murali Veeramoney , Michael D. Rosenzweig , Scott D. Boss , Roger Hurwitz , Bob Davies , Daniel R. Cox
IPC分类号： H04L29/06 , H04L29/08 , G06F3/16
CPC分类号： H04L29/06 , H04L65/80 , H04L29/06027 , H04L69/32
摘要： A real-time media driver for scheduling and mixing media in a multimedia environment. Implemented to operate in conjunction with a non-real-time operating system, the real-time media driver comprises a wave driver which controls a predominant percentage of the operations of the media hardware device and a mini-device driver which is software provided by the vendor of the media hardware device to support functions unique to the particular media hardware device. Furthermore, the real-time media driver comprises a media scheduler which (i) synchronizes multiple media streams prior to being input into a mixing/splitting device of the media scheduler; (ii) allows reconfiguration of attributes of media streams without loss of content prior to and after operations by the mixing/splitting device; and (iii) appropriately mixes media to produce multi-channel media according to a certain "prioritized sharing" policies.
摘要翻译：用于在多媒体环境中调度和混合媒体的实时媒体驱动程序。该实时媒体驱动器被实现为与非实时操作系统一起操作，其包括波形驱动器，该波形驱动器控制媒体硬件设备的主要百分比的操作和由该设备提供的软件的小型设备驱动程序媒体硬件设备的供应商来支持特定媒体硬件设备独有的功能。此外，实时媒体驱动器包括媒体调度器，其（i）在被输入到媒体调度器的混合/分离设备之前同步多个媒体流; （ii）允许在混合/分离设备操作之前和之后，重新配置媒体流的属性而不丢失内容; （iii）根据某些“优先分享”政策，适当地混合媒体制作多渠道媒体。

4. 发明授权

US5926400A Apparatus and method for determining the intensity of a sound in a virtual world 失效
标题翻译：用于确定虚拟世界中的声音的强度的装置和方法
公开(公告)号：US5926400A
公开(公告)日：1999-07-20
申请号：US752842
申请日：1996-11-21
申请人： Kara Kytle , Mark Leavy
发明人： Kara Kytle , Mark Leavy
IPC分类号： G06F3/00 , G06F3/01 , G06F17/50
CPC分类号： G06F3/011
摘要： A method for determining the intensity value of a sound begins by determining if a listener location is within one of an ambient ellipse region and a localized ellipse region, the ambient ellipse region and the localized ellipse region sharing a common focus at an origin of the sound and sharing a common medial axis. The intensity value of the sound is set to an ambient intensity value when the listener location is within the ambient ellipse region. The intensity value of the sound is set to a localized intensity value when the listener location is within the localized ellipse region, and the intensity value of the sound is set to zero when the listener location is not within the localized ellipse region or the ambient ellipse region.
摘要翻译：用于确定声音的强度值的方法首先通过确定听众位置是否在环境椭圆区域和局部椭圆形区域之一内，环境椭圆区域和局部椭圆形区域在声音原点共享公共焦点并共享共同的中轴。当听众位置在环境椭圆区域内时，声音的强度值被设置为环境强度值。当听众位置在局部椭圆区域内时，声音的强度值被设置为局部强度值，当收听者位置不在局部椭圆区域或环境椭圆内时，声音的强度值被设置为零地区。

5. 发明授权

US5864790A Method for enhancing 3-D localization of speech 失效
标题翻译：增强语音三维定位的方法
公开(公告)号：US5864790A
公开(公告)日：1999-01-26
申请号：US826016
申请日：1997-03-26
申请人： Mark Leavy
发明人： Mark Leavy
IPC分类号： G10L21/02 , G10L9/18
CPC分类号： G10L21/02
摘要： A computer-readable medium stores sequences of instructions to be executed by a processor. These instructions cause the processor to perform the following steps to enhance 3-D localization of a speech source. A digital speech signal is received. The maximum frequency of the digital speech signal is determined. The sampling rate of the digital speech signal is increased. Next, wide-band Gaussian noise is added to the digital speech signal to create a wide-band digital speech signal with higher frequencies. Finally, the wide-band digital speech signal can be localized via an FIR (finite impulse response) filter.
摘要翻译：计算机可读介质存储要由处理器执行的指令序列。这些指令使处理器执行以下步骤来增强语音源的3-D定位。接收数字语音信号。确定数字语音信号的最大频率。数字语音信号的采样率增加。接下来，将宽带高斯噪声添加到数字语音信号以产生具有较高频率的宽带数字语音信号。最后，宽带数字语音信号可以通过FIR（有限脉冲响应）滤波器进行定位。

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