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    • 52. 发明授权
    • Methods and systems for providing lawful intercept of a media stream in a media gateway
    • 在媒体网关中提供合法拦截媒体流的方法和系统
    • US07092493B2
    • 2006-08-15
    • US10676234
    • 2003-10-01
    • Hao HouYong HeTuan Minh NguyenAhmed Doleh
    • Hao HouYong HeTuan Minh NguyenAhmed Doleh
    • H04M1/24H04M3/08H04M3/22
    • H04L63/00H04L29/06027H04L63/30H04L65/103H04L65/1043H04M3/2281H04M7/006H04M15/47H04M15/58H04M2215/0148H04M2215/0188
    • Methods and systems for providing lawful intercept of a media stream in a media gateway include establishing a call context between a first termination and a second termination and establishing a tap context with at least one tap termination, which refer to the first termination. The call context defines a call media stream between the first and second terminations associated with a call between first and second end users. The tap context defines at least one tap media stream from the first termination to the at least one tap termination. The tap media stream is a one-way media stream that carries either the mouth portion of the call media stream, the ear portion of the media stream, or a combination of the mouth and ear portions of the media stream from the first termination to the at least one tap termination. Multiple tap contexts can be created to support the lawful intercept of the call by multiple law enforcement agencies.
    • 用于提供媒体网关中的媒体流的合法截取的方法和系统包括在第一终止和第二终止之间建立呼叫上下文,并且建立具有至少一个抽头终止的抽头上下文,其涉及第一终止。 呼叫上下文定义与第一和第二终端用户之间的呼叫相关联的第一和第二终端之间的呼叫媒体流。 抽头上下文定义从第一终止到至少一个抽头终止的至少一个抽头媒体流。 抽头媒体流是单向媒体流,其携带呼叫媒体流的嘴部分,媒体流的耳朵部分,或媒体流的口部和耳朵部分的组合,从第一终止到第 至少一个抽头终止。 可以创建多个分支背景,以支持多个执法机构合法拦截电话。
    • 53. 发明申请
    • Method and apparatus to detect anchor frames from digital video streams
    • 从数字视频流中检测锚帧的方法和装置
    • US20060072832A1
    • 2006-04-06
    • US10952116
    • 2004-09-28
    • Robert NemiroffYong He
    • Robert NemiroffYong He
    • G06K9/36
    • H04N19/107H04N19/114H04N19/137H04N19/172H04N19/40H04N19/61
    • A method (60) and apparatus process video in a multiple encoder system by identifying (61) those frames that were originally encoded as anchor frames in the first encoder and ensuring that the second encoder (e.g., the re-encoder) encodes (65) these identified frames as anchor frames rather than bidirectional frames or non-anchor frames. In addition, the second encoder identifies (62) those frames that were originally encoded as non-anchor frames in the first encoder and encodes (66) the non-anchor frames, such as bidirectional frames, as non-anchor frames during the second encoding process. Once the anchor frames (and non-anchor frames) are identified, the present invention also determines (63) a frame-type pattern output by the first encoder and synchronizes (64) the second encoder to the identified frame-type pattern of the first encoder, thereby ensuring optimal utilization of encoder resources. A method for determining frame type (80) based on relative spatial activity is also set forth. Moreover, methods for frame-type-synchronizing (70, 100) are disclosed as well. Moreover, a method for determining a pattern of frame types is disclosed.
    • 一种方法(60),并且在多编码器系统中通过识别(61)最初被编码为第一编码器中的锚帧的帧并且确保第二编码器(例如,重编码器)编码(65)的装置来处理视频, 这些识别的帧作为锚帧,而不是双向帧或非锚帧。 另外,第二编码器识别(62)在第一编码器中最初被编码为非锚定帧的那些帧,并且在第二编码期间将(66)非锚定帧(例如双向帧)编码为非锚定帧 处理。 一旦锚定帧(和非锚定帧)被识别,本发明还确定(63)由第一编码器输出的帧型图案,并且将第二编码器与第一编码器识别出的帧类型图案同步(64) 编码器,从而确保编码器资源的最佳利用。 还提出了一种基于相对空间活动来确定帧类型(80)的方法。 此外,还公开了帧类型同步的方法(70,100)。 此外,公开了一种用于确定帧类型的模式的方法。
    • 54. 发明授权
    • Methods and apparatus for rate control during dual pass encoding
    • 双通道编码时速率控制的方法和装置
    • US06961376B2
    • 2005-11-01
    • US10183196
    • 2002-06-25
    • Siu-Wai WuVincent LiuYong He
    • Siu-Wai WuVincent LiuYong He
    • H04N7/26H04N7/12
    • H04N19/194H04N19/115H04N19/14H04N19/172
    • Methods and apparatus for rate control in a dual pass encoding scheme are provided. A first pass encoder encodes alternate slices of anchor frames as I-slices and P-slices respectively in order to generate statistics for both I and P frame encoding for the same anchor frame. An initial complexity estimate for encoding a current frame is determined by the first pass encoder based on statistics from first pass encoding of the current frame and from first pass encoding of a prior encoded frame. A second pass encoder estimates an encoding complexity for the current frame based on the initial complexity and statistics from second pass encoding of the prior encoded frame. The second pass encoder then determines a bit budget for second pass encoding of the current frame based on the encoding complexity.
    • 提供了双通道编码方案中的速率控制方法和装置。 第一遍编码器将锚帧的替代片分别编码为I片和P片,以便产生用于相同锚帧的I和P帧编码的统计。 用于编码当前帧的初始复杂度估计由第一遍编码器基于来自当前帧的第一遍编码和先前编码帧的第一遍编码的统计确定。 第二遍编码器基于来自先前编码帧的第二遍编码的初始复杂度和统计信息来估计当前帧的编码复杂度。 然后,第二遍编码器基于编码复杂度确定当前帧的第二遍编码的比特预算。
    • 55. 发明申请
    • Methods and systems for performing call handover in a media gateway
    • 用于在媒体网关中执行呼叫切换的方法和系统
    • US20050048973A1
    • 2005-03-03
    • US10653674
    • 2003-09-02
    • Hao HouYong HeTuan NguyenAhmed Doleh
    • Hao HouYong HeTuan NguyenAhmed Doleh
    • H04L29/06H04W36/12H04Q7/20
    • H04W36/12H04L29/06027H04L65/103H04L65/1043H04L65/1083
    • Methods and systems for controlling media stream handover in a media gateway includes establishing a call context between a first termination and a second termination in a media gateway. The first and second terminations are capable of bi-directional media stream communications associated with a call between first and second end users. In response to a handover event affecting the first termination, a third termination is added to the context. The third termination is initially capable of receive-only communications. The context is then modified such that the third termination becomes capable of bidirectional media stream communications and the first termination becomes capable of receive-only communications. The first termination is then removed from the context. The media stream handover may be performed using extensions to a media gateway control protocol and without using a conference bridge.
    • 用于控制媒体网关中的媒体流切换的方法和系统包括在媒体网关中的第一终止和第二终止之间建立呼叫上下文。 第一和第二终端能够与第一和第二终端用户之间的呼叫相关联的双向媒体流通信。 响应于影响第一终止的切换事件,将第三终端添加到上下文。 第三个终端最初只能接收通信。 然后修改上下文,使得第三终端变得能够进行双向媒体流通信,并且第一终端变得能够仅接收通信。 然后从上下文中删除第一个终止。 可以使用媒体网关控制协议的扩展来执行媒体流切换,而不使用会议桥。