公开(公告)号：US07055038B2

公开(公告)日：2006-05-30

申请号：US09850356

申请日：2001-05-07

申请人： Allen J. C. Porter ,  Chun Wang ,  Kevork Kechichian ,  Gabriel Varga ,  David Strasser

发明人： Allen J. C. Porter ,  Chun Wang ,  Kevork Kechichian ,  Gabriel Varga ,  David Strasser

IPC分类号： G06F12/14 ,  G06T1/00 ,  H04L9/00

CPC分类号： G06F12/1458 ,  G06F12/1441 ,  G09G5/363 ,  G09G5/39 ,  G09G2340/02 ,  G09G2360/12 ,  H04N5/4401 ,  H04N21/4405 ,  H04N21/4408 ,  H04N21/4435

摘要： A graphics processor receives a compressed encrypted video stream. The graphics processor decrypts the compressed encrypted video stream and stores a decrypted version (i.e., a decrypted compressed video stream) in a protected portion of an on-chip or off-chip video memory. The graphics processor then permits processors and other bus masters on the graphics processor to access the on-chip video memory, but conditionally limits access to other bus masters that are located off-chip, such as a central processing unit located off-chip and coupled to the graphics processor via a bus.

公开(公告)号：US07788505B2

公开(公告)日：2010-08-31

申请号：US11300542

申请日：2005-12-14

申请人： Allen J. C. Porter ,  Chun Wang ,  Kevork Kechichian ,  Gabriel Varga ,  David Strasser

发明人： Allen J. C. Porter ,  Chun Wang ,  Kevork Kechichian ,  Gabriel Varga ,  David Strasser

IPC分类号： G06F11/30

CPC分类号： G06F12/1458 ,  G06F12/1441 ,  G09G5/363 ,  G09G5/39 ,  G09G2340/02 ,  G09G2360/12 ,  H04N5/4401 ,  H04N21/4405 ,  H04N21/4408 ,  H04N21/4435

摘要： A graphics processor receives a compressed encrypted video stream. The graphics processor decrypts the compressed encrypted video stream and stores a decrypted version (i.e., a decrypted compressed video stream) in a protected portion of an on-chip or off-chip video memory. The graphics processor then permits processors and other bus masters on the graphics processor to access the on-chip video memory, but conditionally limits access to other bus masters that are located off-chip, such as a central processing unit located off-chip and coupled to the graphics processor via a bus.

摘要翻译： 图形处理器接收压缩的加密视频流。 图形处理器解密压缩的加密视频流，并将解密版本（即，解密的压缩视频流）存储在片上或片外视频存储器的受保护部分中。 然后，图形处理器允许图形处理器上的处理器和其他总线主机访问片上视频存储器，但有条件地限制对位于芯片外的其它总线主机的访问，诸如位于芯片外的耦合的中央处理单元 通过总线到图形处理器。

公开(公告)号：US20060123248A1

公开(公告)日：2006-06-08

申请号：US11300542

申请日：2005-12-14

申请人： Allen Porter ,  Chun Wang ,  Kevork Kechichian ,  Gabriel Varga ,  David Strasser

发明人： Allen Porter ,  Chun Wang ,  Kevork Kechichian ,  Gabriel Varga ,  David Strasser

IPC分类号： H04N7/16 ,  G06F11/00 ,  G06F12/14 ,  H04L9/32 ,  G06F1/26 ,  G06F17/30 ,  G08B13/00 ,  G06F11/30 ,  G06F7/04 ,  G08B21/00 ,  G06K9/00 ,  G08B29/00 ,  H03M1/68 ,  H04K1/00 ,  H04L9/00

CPC分类号： G06F12/1458 ,  G06F12/1441 ,  G09G5/363 ,  G09G5/39 ,  G09G2340/02 ,  G09G2360/12 ,  H04N5/4401 ,  H04N21/4405 ,  H04N21/4408 ,  H04N21/4435

摘要： A graphics processor receives a compressed encrypted video stream. The graphics processor decrypts the compressed encrypted video stream and stores a decrypted version (i.e., a decrypted compressed video stream) in a protected portion of an on-chip or off-chip video memory. The graphics processor then permits processors and other bus masters on the graphics processor to access the on-chip video memory, but conditionally limits access to other bus masters that are located off-chip, such as a central processing unit located off-chip and coupled to the graphics processor via a bus.

公开(公告)号：US20050265547A1

公开(公告)日：2005-12-01

申请号：US11175882

申请日：2005-07-06

申请人： David Strasser ,  Edwin Pang ,  Gabriel Varga

发明人： David Strasser ,  Edwin Pang ,  Gabriel Varga

IPC分类号： H04L9/08 ,  H04L9/30 ,  H04N7/167 ,  H04N21/418 ,  H04N21/4367 ,  H04L9/00

CPC分类号： H04N21/4181 ,  H04L9/0841 ,  H04L9/0891 ,  H04L2209/605 ,  H04N7/1675 ,  H04N21/4367

摘要： A copy protection (CP) key used by a sending source, such as a POD, to encrypt content such as audio and/or video information is derived by a first key generator associated with a first processor and is locally encrypted by the first processor using a locally generated bus encryption key to produce a bus encrypted CP key that is sent over a local unsecure bus to a second processor, such as a graphics processor. The second processor decrypts the bus encrypted copy key using a decryption engine to obtain the CP key. The second processor receives the encrypted content and in one embodiment, also uses the same decryption engine to decrypt the encrypted content. The first and second processors locally exchange public keys to each locally derive a bus encryption key used to encrypt the CP key before it is sent over the unsecure bus and decrypt the encrypted CP key after it is sent over the bus. The locally exchanged public keys are shorter in length than those used between the CPU and POD to produce the original CP key.

摘要翻译： 由POD等发送源用于加密诸如音频和/或视频信息的内容的复制保护（CP）密钥由与第一处理器相关联的第一密钥生成器导出，并且由第一处理器本地加密使用 本地生成的总线加密密钥，以产生通过本地不安全总线发送到诸如图形处理器的第二处理器的总线加密CP密钥。 第二处理器使用解密引擎解密总线加密复制密钥以获得CP密钥。 第二处理器接收加密的内容，并且在一个实施例中，也使用相同的解密引擎来解密加密的内容。 第一和第二处理器在本机之间本地交换公共密钥本地导出用于在通过不安全总线发送之前对CP密钥进行加密的总线加密密钥，并且在通过总线发送之后解密加密的CP密钥。 本地交换的公钥的长度要比在CPU和POD之间使用的公钥短，以产生原始的CP密钥。

公开(公告)号：US06335761B1

公开(公告)日：2002-01-01

申请号：US09212132

申请日：1998-12-15

申请人： David I. J. Glen ,  Michael Frank ,  David Strasser

发明人： David I. J. Glen ,  Michael Frank ,  David Strasser

IPC分类号： H04N964

CPC分类号： H04N9/641

摘要： A method and apparatus for converting the color base of an image input layer include processing that begins by interpreting a conversion flag. The processing then continues by converting the color base of the image input layer from a first color base to a second color base when the conversion flag indicates a color base conversion. Note that a color base corresponds to standardized colorometries of video signals, color space of video signals, and/or any other displaying characteristics of video signals that are standardized or may be subsequently standardized. Further note that an image input layer corresponds to a display or portion thereof (e.g., a window or a picture in picture), wherein the display is capable of presenting images from multiple video and/or graphics data sources (e.g., a television signal and a computer application).

摘要翻译： 用于转换图像输入层的色底的方法和装置包括通过解释转换标志开始的处理。 然后，当转换标志指示色彩转换时，通过将图像输入层的颜色基底从第一颜色基底转换为第二颜色基底来进行处理。 注意，色基对应于标准化的视频信号的颜色度量，视频信号的颜色空间和/或标准化或可以随后标准化的视频信号的任何其他显示特性。 进一步注意，图像输入层对应于显示器或其部分（例如，窗口或图片中的图像），其中显示器能够呈现来自多个视频和/或图形数据源的图像（例如，电视信号和 计算机应用程序）。

公开(公告)号：US20060209210A1

公开(公告)日：2006-09-21

申请号：US10907073

申请日：2005-03-18

申请人： Philip Swan ,  David Strasser

发明人： Philip Swan ,  David Strasser

IPC分类号： H04N9/475

CPC分类号： H04N5/04 ,  H04N5/602 ,  H04N7/012 ,  H04N21/4307 ,  H04N21/4363 ,  H04N21/4622

摘要： An apparatus and method provides automatic audio and video synchronization by calculating a video delay time period based on a signal processing routine to generate the video display signal and automatically setting an audio delay to approximate the video delay time period. In addition the method may include if desired, determining a master device from a plurality of master capable devices. The master device is a processing device including one or more processors capable of making configuration decisions and designating a data flow for rendering a video signal. The master-capable devices are any suitable processing devices which are capable of acting as a master device. The present invention may further include using the master device to determine a signal processing routine to generate a video display signal. The signal processing routine includes a designated data flow from one processing element to a next processing element to a next processing element and so on for different stages of video signal rendering.

摘要翻译： 一种装置和方法通过基于信号处理程序计算视频延迟时间来产生视频显示信号并自动设置音频延迟以近似视频延迟时间来提供自动音频和视频同步。 另外，如果需要，该方法可以包括从多个具有主控能力的设备确定主设备。 主设备是包括能够进行配置决定并指定用于呈现视频信号的数据流的一个或多个处理器的处理设备。 具有主设备的设备是能够充当主设备的任何合适的处理设备。 本发明还可以包括使用主设备来确定产生视频显示信号的信号处理程序。 信号处理程序包括从不同阶段的视频信号渲染的从一个处理单元到下一处理单元的指定数据流到下一处理单元等。

公开(公告)号：US20060176909A1

公开(公告)日：2006-08-10

申请号：US11054470

申请日：2005-02-09

申请人： David Strasser

发明人： David Strasser

IPC分类号： H04H1/04 ,  H04J1/00 ,  H04J3/24

CPC分类号： H04N21/835 ,  H04H60/23 ,  H04N21/42623 ,  H04N21/434

摘要： When a stream of packets (e.g. MPEG-2 transport stream) includes certain packets representing unscrambled digital television program content and certain other packets representing the content of a scrambled digital television program that is currently tuned by a receiver, interception of the unscrambled digital television program at an output of the receiver may be prevented by determining whether packets representing program content have an ascertained characteristic (e.g. have a packet ID matching one of a set of packet IDs) that uniquely identifies the packets as representing content of the scrambled program. For packets not having the characteristic, delivery to the output of the digital television receiver in an unscrambled state may be prevented, e.g., by discarding the packet or by overwriting its payload.

摘要翻译： 当分组流（例如MPEG-2传输流）包括代表未加扰的数字电视节目内容的某些分组和表示当前由接收机调谐的加扰数字电视节目的内容的某些其他分组时，截取未加扰的数字电视节目 可以通过确定表示节目内容的分组是否具有将所述分组唯一地标识为表示加扰节目的内容的确定特征（例如，具有匹配一组分组ID的分组ID）来防止接收机的输出。 对于不具有特征的分组，可以例如通过丢弃分组或重写其有效载荷来防止以未扰频状态传送到数字电视接收机的输出。

公开(公告)号：US20070146542A1

公开(公告)日：2007-06-28

申请号：US11306317

申请日：2005-12-22

申请人： David Strasser

发明人： David Strasser

IPC分类号： H04N11/00

CPC分类号： H04N21/4623 ,  H04N21/4143 ,  H04N21/418 ,  H04N21/4181 ,  H04N21/4183 ,  H04N21/4305 ,  H04N21/440218 ,  H04N21/4405 ,  H04N21/4621

摘要： To receive new services including audio or video content for presentation by a cable-compatible digital television or other digital audio/video receiver, a module may be connected to the HOST-POD interface of the digital television. The module has a receiver for receiving audio or video content in a first compression format, a transcoder for converting said audio or video content from the first compression format into a second, different compression format, and a controller for transmitting the audio or visual content in the second compression format to the digital television over a HOST-POD interface. By using such a module, front-end components of the digital television may be bypassed while back-end components may be utilized to decompress and present the content. The module may be a PC card or smart card for example.

摘要翻译： 为了接收新的服务，包括音频或视频内容，用于由电缆兼容的数字电视或其他数字音频/视频接收机呈现，模块可以连接到数字电视的HOST-POD接口。 该模块具有用于以第一压缩格式接收音频或视频内容的接收器，用于将所述音频或视频内容从第一压缩格式转换成第二不同压缩格式的代码转换器，以及用于将音频或视频内容传输到 通过HOST-POD接口向数字电视提供第二种压缩格式。 通过使用这样的模块，数字电视的前端组件可以被旁路，而后端组件可以用于解压缩并呈现内容。 该模块可以是例如PC卡或智能卡。

公开(公告)号：US20060140585A1

公开(公告)日：2006-06-29

申请号：US11019246

申请日：2004-12-23

申请人： David Strasser

发明人： David Strasser

IPC分类号： H04N5/91

CPC分类号： H04N5/913 ,  H04N2005/91328

摘要： To detect at least one of a copy protection indicator and a redistribution control indicator in an analog video signal, the video format of the analog video signal is determined, e.g., by detecting the horizontal frequency and vertical frequency of the signal. Based at least on the determined video format, a region of the analog video signal that may contain the indicator is identified. The region may for example be one or more video lines in a vertical blanking interval. The region is examined until the indicator is detected. The indicator is confirmed, e.g., by re-detecting one or more occurrences of the same indicator value(s) later in the video signal. Once confirmed, the indicated copy protection and/or redistribution control may be effected by limiting either or both of copying and redistribution of the analog video signal. The indicator may for example be Copy Generation Management System Analog plus Redistribution Control (CGMS-A+RC) information.

摘要翻译： 为了检测模拟视频信号中的复制保护指示符和再分配控制指示符中的至少一个，例如通过检测信号的水平频率和垂直频率来确定模拟视频信号的视频格式。 至少基于所确定的视频格式，识别可以包含指示符的模拟视频信号的区域。 该区域可以例如是垂直消隐间隔中的一个或多个视频行。 检查该区域直到检测到指示符。 例如，通过重新检测视频信号中稍后出现的相同指示符值的一个或多个出现来确认指示符。 一旦被确认，所指示的复制保护和/或再分配控制可以通过限制模拟视频信号的复制和重新分配中的一个或两者来实现。 指示器可以例如是复制生成管理系统模拟加再分配控制（CGMS-A + RC）信息。