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    Distributed on-demand media transcoding system and method
    5.
    发明授权
    Distributed on-demand media transcoding system and method 有权
    分布式按需媒体转码系统和方法

    公开(公告)号：US07355531B2

    公开(公告)日：2008-04-08

    申请号：US11825705

    申请日：2007-07-09

    申请人： Angela C. W. Lai ,  Howard E. Chartock ,  Christopher V. Pirazzi ,  Steve H. Chen ,  Jody Shapiro ,  James Peter Hoddie

    发明人： Angela C. W. Lai ,  Howard E. Chartock ,  Christopher V. Pirazzi ,  Steve H. Chen ,  Jody Shapiro ,  James Peter Hoddie

    IPC分类号： H03M7/34

    CPC分类号： H04N21/2404 ,  H04N7/17318 ,  H04N19/40 ,  H04N21/23106 ,  H04N21/234309 ,  H04N21/23439 ,  H04N21/2405 ,  H04N21/2408 ,  H04N21/2743 ,  H04N21/4622 ,  H04N21/6125 ,  H04N21/6336 ,  H04N21/6379 ,  H04N21/643 ,  H04N21/64769 ,  H04N21/8193

    摘要： A method for delivering media content over a network includes transcoding the media content to generate multiple copies of the media content, each of the multiple copies having a different destination type or a different source type or both, storing the multiple copies in a cache, receiving requests for the media content, and selecting and delivering a copy of one of the multiple copies in response to each of the requests. A further method for providing media content transcoding services includes fetching media content, selecting one of multiple transcoders for transcoding from multiple source types to multiple destination types, wherein the one transcoder is selected based at least on the destination type, sending the media content to the selected transcoder, transcoding the media content to the destination type, thereby generating transcoded media content, and transmitting the transcoded media content.

    摘要翻译： 一种用于通过网络递送媒体内容的方法包括对媒体内容进行代码转换以生成媒体内容的多个副本，多个副本中的每一个具有不同的目的地类型或不同的源类型或两者，将多个副本存储在高速缓存中，接收 请求媒体内容，以及响应于每个请求选择和传送多个副本之一的副本。 用于提供媒体内容转码服务的另一方法包括获取媒体内容，选择多个代码转换器之一用于从多个源类型转码为多个目的地类型，其中至少基于目的地类型选择一个代码转换器，将媒体内容发送到 选择的代码转换器，将媒体内容转码为目的地类型，从而生成代码转换的媒体内容，以及发送经转码的媒体内容。

    Distributed on-demand media transcoding system and method
    6.
    发明授权
    Distributed on-demand media transcoding system and method 有权
    分布式按需媒体转码系统和方法

    公开(公告)号：US07242324B2

    公开(公告)日：2007-07-10

    申请号：US10644602

    申请日：2003-08-20

    申请人： Angela C. W. Lai ,  James Peter Hoddie ,  Howard E. Chartock ,  Christopher V. Pirazzi ,  Steve H. Chen ,  Jody Shapiro

    发明人： Angela C. W. Lai ,  James Peter Hoddie ,  Howard E. Chartock ,  Christopher V. Pirazzi ,  Steve H. Chen ,  Jody Shapiro

    IPC分类号： H03M7/00

    CPC分类号： H04N21/2404 ,  H04N7/17318 ,  H04N19/40 ,  H04N21/23106 ,  H04N21/234309 ,  H04N21/23439 ,  H04N21/2405 ,  H04N21/2408 ,  H04N21/2743 ,  H04N21/4622 ,  H04N21/6125 ,  H04N21/6336 ,  H04N21/6379 ,  H04N21/643 ,  H04N21/64769 ,  H04N21/8193

    摘要： A method for delivering media content over a network includes transcoding the media content to generate multiple copies of the media content, each of the multiple copies having a different destination type or a different source type or both, storing the multiple copies in a cache, receiving requests for the media content, and selecting and delivering a copy of one of the multiple copies in response to each of the requests. A further method for providing media content transcoding services includes fetching media content, selecting one of multiple transcoders for transcoding from multiple source types to multiple destination types, wherein the one transcoder is selected based at least on the destination type, sending the media content to the selected transcoder, transcoding the media content to the destination type, thereby generating transcoded media content, and transmitting the transcoded media content.

    摘要翻译： 一种用于通过网络递送媒体内容的方法包括对媒体内容进行代码转换以生成媒体内容的多个副本，多个副本中的每一个具有不同的目的地类型或不同的源类型或两者，将多个副本存储在高速缓存中，接收 请求媒体内容，以及响应于每个请求选择和传送多个副本之一的副本。 用于提供媒体内容转码服务的另一方法包括获取媒体内容，选择多个代码转换器之一用于从多个源类型转码为多个目的地类型，其中至少基于目的地类型选择一个代码转换器，将媒体内容发送到 选择的代码转换器，将媒体内容转码为目的地类型，从而生成代码转换的媒体内容，以及发送经转码的媒体内容。

    Rectifying overflow and underflow in equalized audio waveforms
    10.
    发明授权
    Rectifying overflow and underflow in equalized audio waveforms 有权
    在均衡的音频波形中整流溢出和下溢

    公开(公告)号：US06795740B1

    公开(公告)日：2004-09-21

    申请号：US09516387

    申请日：2000-03-01

    申请人： Ke Chiang Chu ,  Hong Kaura ,  James Peter Hoddie

    发明人： Ke Chiang Chu ,  Hong Kaura ,  James Peter Hoddie

    IPC分类号： G06E1700

    CPC分类号： H03G3/3089 ,  H03G7/007 ,  H03G11/008

    摘要： The invention is a method, apparatus and computer readable program for eliminating overflow and underflow by re-adjusting or rectifying the audio levels of an audio signal in those portions where overflow/underflow occurs. In a first preferred embodiment a single stage scale down solution is provided in starting and end points of the overflow/underflow areas in the audio signal are detected, and a number of discrete sampling points along the audio signal curve between these two points are adjusted by a predetermined multiplier in order to reduce the positive level (in the case of overflow) or negative level (in the case of underflow) of each discrete sampling point. Using the single stage scale down solution of the present invention, a new audio signal is created having no overflow/underflow, yet maintaining the former generally smooth shape of the audio signal waveform and signal characteristics, without completely clipping the audio levels. In a second preferred embodiment a multi-stage scale down solution is provided in which the overflow/underflow is divided into sections, such that the discrete sampling points in one section may be adjusted by a first multiplier in order to reduce their audio levels; while discrete sampling points in another, section may be adjusted by a second multiplier (which is preferably different than the first multiplier) in order to reduce their audio levels. Accordingly, a new audio signal is constructed with reduced overflow/underflow, yet maintaining a generally smooth signal curve and characteristics, without completely clipping the audio levels.

    摘要翻译： 本发明是一种用于通过在发生溢出/下溢的部分中重新调整或整流音频信号的音频电平来消除上溢和下溢的方法，装置和计算机可读程序。在第一优选实施例中，单级缩小解决方案是 检测在音频信号中的溢出/下溢区域的起点和终点中设置的，并且通过预定的乘数来调整沿着这两个点之间的音频信号曲线的多个离散采样点，以便减少正的水平（在 溢出的情况）或每个离散采样点的负电平（在下溢的情况下）。 使用本发明的单级缩小方案，创建了没有上溢/下溢的新的音频信号，并且保持了音频信号波形和信号特性的前者大致平滑的形状，而没有完全限制音频电平。在第二 优选实施例提供了一种多级缩小的解决方案，其中溢出/下溢被分成多个部分，使得一个部分中的离散采样点可以被第一乘法器调整以便降低它们的音频电平; 而另一部分中的离散采样点可以由第二乘法器（其优选地与第一乘法器不同）来调整，以便降低它们的音频电平。 因此，新的音频信号被构造为具有减少的溢出/下溢，但是在没有完全限制音频电平的情况下保持大致平滑的信号曲线和特性。