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公开(公告)号：US5586200A
公开(公告)日：1996-12-17
申请号：US178948
申请日：1994-01-07
IPC分类号： H04N5/92 , G06T5/00 , G06T9/20 , H03M7/30 , H04N5/937 , H04N7/26 , H04N9/804 , H04N9/808 , G06K9/36
CPC分类号： G06T7/0085 , G06T9/20
摘要： An image processing system encodes a natural image into a segmented or mosaic image having well-defined edges and a residual image. The segmented image is encoded using a lossless encoding technique while the residual image is encoded using a lossy technique. This encoded image may be recorded on a video tape such that the segmented image may be recovered in picture-in-shuttle modes such as fast forward and fast rewind. In addition, the recorded image may be decoded and reencoded through several generational levels without experiencing significant degradation in perceived image quality. The segmented image is produced by an encoder which employs a multi-scale edge finder that is able to resolve transitions occurring over two, four and eight pixels into an edge located between two pixels. In addition, the lossless encoder includes circuitry which chain-encodes the segmented image into a low-resolution image and multiple complementary images such that the low-resolution image may be stored as a single data packet and, thus, recovered as a unit from the tape in picture-in-shuttle mode.
摘要翻译： 图像处理系统将自然图像编码为具有明确定义的边缘和残留图像的分割或马赛克图像。 使用无损编码技术对分割图像进行编码，同时使用有损技术对残差图像进行编码。 该编码图像可以被记录在录像带上，使得分割的图像可以以诸如快进和快退的快照模式恢复。 此外，所记录的图像可以通过几代代等级被解码和重新编码，而不会感觉到感知图像质量的显着劣化。 分割图像由编码器产生，该编码器采用多尺度边缘检测器，其能够将在两个，四个和八个像素上发生的转换分解成位于两个像素之间的边缘。 此外，无损编码器包括将分割图像链接编码为低分辨率图像和多个互补图像的电路，使得低分辨率图像可以作为单个数据分组存储，并因此作为单元从 磁带在图像在穿梭模式。
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2.发明授权
公开(公告)号：US5420971A
公开(公告)日：1995-05-30
申请号：US213127
申请日：1994-03-15
CPC分类号： G06T9/20 , G06T7/0085
摘要： An edge finder for an image processing system locates edges in a digitized image over several different ranges of pixel values and assigns, to each pixel value an edge characteristic value which represents a minimum edge value for the pixel in the image. The exemplary edge finder that is able to resolve transitions occurring between two pixels or over groups of four or eight pixels to determine whether an edge should be defined between the original two pixels. The edge finder simultaneously examines four edges in two dimensions to determine the edgeness value for each pixel in the digitized image.
摘要翻译： 用于图像处理系统的边缘查找器将数字化图像中的边缘定位在几个不同的像素值范围上，并且向每个像素值分配表示图像中的像素的最小边缘值的边缘特征值。 能够解析发生在四个或八个像素的两个像素或以上组之间的转换的示例性边缘寻找器，以确定是否应当在原始两个像素之间定义边缘。 边缘检索器同时检查二维中的四个边，以确定数字化图像中每个像素的渐近值。
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3.发明申请Methods and Apparatus for Secure and Adaptive Delivery of Multimedia Content 有权多媒体内容的安全和自适应传送的方法和装置公开(公告)号：US20080013719A1
公开(公告)日：2008-01-17
申请号：US11781699
申请日：2007-07-23
IPC分类号： H04K1/04
CPC分类号： H04L65/602 , H04L29/06027 , H04L65/607
摘要： Techniques for securely and adaptively delivering multimedia content. It is assumed that a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each access unit from the set of alternate access units of the previous time slot are obtained. An encryption stream index is then assigned to each access unit in the set of alternate access units in the current time slot, such that the encryption index increases over time. Thus, the invention overcomes the problem of encrypting a multimedia stream that may have multiple access units for each time slot by selecting the encryption index for each access unit such that the encryption index increases, regardless of which access unit the delivery system (e.g., server) selects for transmission.
摘要翻译： 安全和自适应地传送多媒体内容的技术。 假设获得了用于每个时隙的一组备用存取单元。 然后，获得来自前一时隙的一组备用访问单元的每个访问单元的加密流索引。 然后，将加密流索引分配给当前时隙中的备用访问单元集合中的每个访问单元，使得加密索引随时间增加。 因此，本发明克服了通过选择每个接入单元的加密索引来加密每个时隙可能具有多个接入单元的多媒体流的问题，使得加密索引增加，而不考虑哪个接入单元的传送系统（例如，服务器 ）选择进行传输。
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公开(公告)号：US20070130359A1
公开(公告)日：2007-06-07
申请号：US11670512
申请日：2007-02-02
IPC分类号： G06F15/16
CPC分类号： H04L29/06 , H04L29/06027 , H04L65/4076 , H04L65/607 , H04L65/608 , H04L67/306 , H04L69/329
摘要： A resource-efficient live streaming system includes a broadcaster and a streaming server. The broadcaster receives a live feed and broadcasts a media stream to the streaming server containing several descriptions of the live feed along with control information. The broadcaster includes a stream thinner that implements a pruning algorithm. If descriptions from different streams are similar enough, one or more of them may be discarded without penalizing the quality of service perceived by the receivers. The streaming server assembles compressed data units into streams according to the control information from the broadcaster. The streaming server may also gather client feedback in order to estimate the status of the transmission channels and forwards the information to the broadcaster. The streaming server builds and streams media information to clients according to user preferences and receiver capabilities.
摘要翻译： 一个资源有效的直播流系统包括一个广播公司和一个流媒体服务器。 广播公司收到实时订阅源，并将媒体流广播到流媒体服务器，其中包含有关实时供稿的多个描述以及控制信息。 广播者包括实现修剪算法的流更薄。 如果来自不同流的描述足够相似，则可以丢弃它们中的一个或多个，而不会损害接收器感知到的服务质量。 流媒体服务器根据来自广播公司的控制信息将压缩数据单元组装成流。 流服务器还可以收集客户端反馈，以估计传输信道的状态并将信息转发给广播者。 流媒体服务器根据用户偏好和接收机功能，将媒体信息建立并传输给客户端。
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5.发明授权公开(公告)号：US06614935B2
公开(公告)日：2003-09-02
申请号：US09666667
申请日：2000-09-20
IPC分类号： G06K936
CPC分类号： H04N19/87 , H04N19/115 , H04N19/124 , H04N19/14 , H04N19/142 , H04N19/15 , H04N19/172 , H04N19/176 , H04N19/177 , H04N19/179 , H04N19/182 , H04N19/192 , H04N19/61
摘要： Systems and methods are provided for for encoding units of digital information such as pictures, whereby all the data is first analyzed by running a compression pass over all the data, using the in the encoder embedded rate control mechanism. Picture attributes, such as quantization scale setting and bits produced will be extracted from the resulting bitstream, and analyzing this, indiviudal unit (picture) quantization scale and bit allocation settings are prepared for a next pass for either a constant- or variable bit rate, whereby buffer boundaries are observed. In a second compression pass through the same data, a constant- or variable bit rate compressed bitstream is produced, but this time bypassing the embedded rate control mechanism, and using the prepared picture bit allocation and quantization scale settings instead. Additionally, a mechanism will supervise the total bit production accuracy.
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6.发明授权Methods and apparatus for secure and adaptive delivery of multimedia content 有权用于安全和自适应地传送多媒体内容的方法和装置公开(公告)号：US09071664B2
公开(公告)日：2015-06-30
申请号：US12533643
申请日：2009-07-31
CPC分类号： H04L65/602 , H04L29/06027 , H04L65/607
摘要： Techniques for securely and adaptively delivering multimedia content are disclosed in which a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each access unit from the set of alternate access units of the previous time slot are obtained. An encryption stream index is then assigned to each access unit in the set of alternate access units in the current time slot, such that the encryption index increases over time. Thus, the invention overcomes the problem of encrypting a multimedia stream that may have multiple access units for each time slot by selecting the encryption index for each access unit such that the encryption index increases, regardless of which access unit the delivery system (e.g., server) selects for transmission.
摘要翻译： 公开了用于安全和自适应地递送多媒体内容的技术，其中获得了用于每个时隙的一组备用访问单元。 然后，获得来自前一时隙的一组备用访问单元的每个访问单元的加密流索引。 然后，将加密流索引分配给当前时隙中的备用访问单元集合中的每个访问单元，使得加密索引随时间增加。 因此，本发明克服了通过选择每个接入单元的加密索引来加密每个时隙可能具有多个接入单元的多媒体流的问题，使得加密索引增加，而不考虑哪个接入单元的传送系统（例如，服务器 ）选择进行传输。
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公开(公告)号：US08345766B2
公开(公告)日：2013-01-01
申请号：US12128935
申请日：2008-05-29
IPC分类号： H04N7/12
CPC分类号： H04N21/23439 , H04N19/159 , H04N19/164 , H04N19/172 , H04N19/587 , H04N19/61 , H04N21/2662
摘要： An apparatus and corresponding method are provided for selecting one of several alternate input streams for transmission, the method including determining bandwidth requirements for each of the alternate input streams, measuring bandwidth currently available for transmission, and selecting for transmission one of the alternate input streams that has the highest determined bandwidth requirement less than or equal to the measured bandwidth currently available for transmission.
摘要翻译： 提供了一种装置和相应方法，用于选择若干替代输入流中的一个以进行传输，所述方法包括确定每个替代输入流的带宽需求，测量当前可用于传输的带宽，以及选择传输替代输入流之一， 具有小于或等于当前可用于传输的测量带宽的最高确定带宽要求。
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8.发明申请Methods and Apparatus for Secure and Adaptive Delivery of Multimedia Content 有权多媒体内容的安全和自适应传送的方法和装置公开(公告)号：US20090290706A1
公开(公告)日：2009-11-26
申请号：US12533643
申请日：2009-07-31
IPC分类号： H04L9/00
CPC分类号： H04L65/602 , H04L29/06027 , H04L65/607
摘要： Techniques for securely and adaptively delivering multimedia content are disclosed in which a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each access unit from the set of alternate access units of the previous time slot are obtained. An encryption stream index is then assigned to each access unit in the set of alternate access units in the current time slot, such that the encryption index increases over time. Thus, the invention overcomes the problem of encrypting a multimedia stream that may have multiple access units for each time slot by selecting the encryption index for each access unit such that the encryption index increases, regardless of which access unit the delivery system (e.g., server) selects for transmission.
摘要翻译： 公开了用于安全和自适应地递送多媒体内容的技术，其中获得了用于每个时隙的一组备用访问单元。 然后，获得来自前一时隙的一组备用访问单元的每个访问单元的加密流索引。 然后，将加密流索引分配给当前时隙中的备用访问单元集合中的每个访问单元，使得加密索引随时间增加。 因此，本发明克服了通过选择每个接入单元的加密索引来加密每个时隙可能具有多个接入单元的多媒体流的问题，使得加密索引增加，而不考虑哪个接入单元的传送系统（例如，服务器 ）选择进行传输。
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公开(公告)号：US07249264B2
公开(公告)日：2007-07-24
申请号：US10114140
申请日：2002-04-02
CPC分类号： H04L63/0428
摘要： A system, method and computer readable medium for providing secure IP-based streaming in a format independent manner is disclosed. The method on a content mastering system begins with an encoded media file consisting of content data and associated metadata. First, the metadata is read from the encoded media file. Next, the encoded media file including the content data and the associated metadata is encrypted. Then, in a streaming server system, the encoded/encrypted media file is divided into more than one data packet, streamed in accordance with one or more parameters in the metadata. Each data packet includes a portion of the encoded/encrypted media file and an offset value corresponding to a location within the encoded/encrypted media file. The data packets are then streamed to a client information processing system (i.e., the client) over a network.
摘要翻译： 公开了一种以格式独立的方式提供安全的基于IP的流传输的系统，方法和计算机可读介质。 内容母版制系统上的方法以包含内容数据和关联元数据的编码媒体文件开始。 首先，从编码的媒体文件中读取元数据。 接下来，加密包含内容数据和关联元数据的编码媒体文件。 然后，在流服务器系统中，编码/加密的媒体文件被分成多个数据包，根据元数据中的一个或多个参数流式传输。 每个数据分组包括编码/加密的媒体文件的一部分和对应于编码/加密的媒体文件内的位置的偏移值。 数据包然后通过网络流式传输到客户端信息处理系统（即，客户端）。
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公开(公告)号：US20060215676A1
公开(公告)日：2006-09-28
申请号：US11090616
申请日：2005-03-25
IPC分类号： H04L12/56
摘要： A system and method that selects among multiple encodings of the same content to adapt to available bandwidth and meet delay constraints by minimizing the switching lag is disclosed. The system and method include one buffer serving multiple data streams and a switching device. The switching device switches between the multiple data streams and discards data from the buffer that does not belong to a new stream to eliminate switching lag after a switching decision has been made.
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