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1.发明授权Method and apparatus for operating a transport stream encoder to produce a stream of packets carrying data representing a plurality of component signals 失效用于操作传输流编码器以产生携带表示多个分量信号的数据的分组流的方法和装置
公开(公告)号：US5574505A
公开(公告)日：1996-11-12
申请号：US442429
申请日：1995-05-16
IPC分类号： H04L12/801 , H04L12/911 , H04N7/10 , H04N7/52 , H04N19/00 , H04N21/236 , H04N21/2362 , H04N21/2389 , H04Q11/04 , H04N7/24
CPC分类号： H04N21/4347 , H04N21/2365 , H04N7/52
摘要： A method and apparatus are disclosed for operating a transport stream encoder to produce a stream of packets carrying data representing a plurality of component signals which comprises the following steps. The packet stream is partitioned into successive groups, each group containing a predetermined number of packet slots. A plurality of priority lists is maintained, one for each of the packet slots in the group. Each priority list contains a plurality of entries, and each entry identifies one of the component signals. When a packet slot is to be produced, the entries in the priority list corresponding to that packet slot are traversed, one at a time. For each of those entries it is determined whether the component signal identified by that entry can produce a packet. If it can, a packet containing data representing that component signal is produced. Only if none of the component signals identified by the entries in the priority list can produce a packet is a null packet produced.
摘要翻译： 公开了一种用于操作传输流编码器以产生携带表示多个分量信号的数据的分组流的方法和装置，其包括以下步骤。 分组流被划分成连续的组，每个组包含预定数量的分组时隙。 保持多个优先级列表，一组用于组中的每个分组时隙。 每个优先级列表包含多个条目，并且每个条目标识组件信号之一。 当要生成分组时隙时，遍历与该分组时隙对应的优先级列表中的条目，一次一个。 对于这些条目中的每一个，确定由该条目标识的分量信号是否可以产生分组。 如果可以，则产生包含表示该分量信号的数据的分组。 只有当优先级列表中的条目标识的分量信号都不能产生分组时，才产生一个空分组。
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公开(公告)号：US5621463A
公开(公告)日：1997-04-15
申请号：US442430
申请日：1995-05-16
IPC分类号： H04L12/70 , H04N7/10 , H04N7/52 , H04N19/00 , H04N21/236 , H04N21/2389 , H04Q11/04
CPC分类号： H04N21/23655 , H04N7/52
摘要： A transport stream encoder is disclosed which comprises a plurality of FIFO buffers coupled to sources of component signals. Each of the FIFO buffers has a data output terminal for producing component signal data. A packetizer has a data input terminal for receiving component signal data, and produces a packet stream. A data bus is coupled in common to the data output terminals of the FIFO buffers and the data input terminal of the packetizer.
摘要翻译： 公开了一种传输流编码器，其包括耦合到分量信号源的多个FIFO缓冲器。 每个FIFO缓冲器具有用于产生分量信号数据的数据输出端。 打包器具有用于接收分量信号数据的数据输入端，并产生分组流。 数据总线共同耦合到FIFO缓冲器的数据输出端和打包器的数据输入端。
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公开(公告)号：US4831439A
公开(公告)日：1989-05-16
申请号：US194671
申请日：1988-05-16
CPC分类号： H04N21/4302 , H04N19/50 , H04N19/61 , H04N19/90 , H04N21/242 , H04N21/44004 , H04N19/107
摘要： In a DPCM video digital data communication system, each scan line of a video frame is refreshed with PCM data over a refresh cycle comprising a plurality of frames. Refresh generators at the transmitter and at the receiver are synchronized with an initialization signal and with subsequent refresh cycle synchronizing signals. Also the scan lines and frames are synchronized with corresponding transmitted marker synchronizing signals. The refresh generators run asynchronously between marker synchronizing signals to select scan lines for refresh. The refresh generators each employ counters for counting a selected number M which is an integer having no factors in common with the number of scan lines of a frame to select scan lines for refresh which have different spatial positions in adjacent successive frames to avoid generating visible refresh artifacts.
摘要翻译： 在DPCM视频数字数据通信系统中，通过包括多个帧的刷新周期用PCM数据刷新视频帧的每条扫描线。 在发射机和接收机处的刷新发生器与初始化信号和随后的刷新周期同步信号同步。 扫描线和帧也与相应的传输的标记同步信号同步。 刷新生成器在标记同步信号之间异步运行，以选择要刷新的扫描线。 刷新发生器各自使用计数器来计数选定数量M，这是一个整数，其没有与帧的扫描线数相同的因素，以选择在相邻连续帧中具有不同空间位置的用于刷新的扫描线，以避免产生可见的刷新 文物。
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公开(公告)号：US4706260A
公开(公告)日：1987-11-10
申请号：US928042
申请日：1986-11-07
CPC分类号： H03M3/042 , H04N19/503 , H04N19/61 , H04N19/80 , H04N19/82
摘要： In a differential pulse code modulator for image-representative signals, a coder codes difference signals to produce coded signals which have a highly variable rate, which depends upon motion in the image being represented. A rate buffer receives the coded signals and generates a control signal representative, at least in part, of the rate of fill of the rate buffer. Various filters, decimators and/or coarse quantizers associated with the modulator have characteristics controlled by the control signal in order to tend to control the rate of fill of the rate buffer. This aids in preventing loss of information at the receiver.
摘要翻译： 在用于图像代表信号的差分脉冲编码调制器中，编码器对差分信号编码以产生具有高可变速率的编码信号，这取决于所表示的图像中的运动。 速率缓冲器接收编码信号并产生至少部分代表速率缓冲器的填充速率的控制信号。 与调制器相关联的各种滤波器，抽取器和/或粗量化器具有由控制信号控制的特性，以便倾向于控制速率缓冲器的填充速率。 这有助于防止接收机丢失信息。
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5.发明授权Splicing compressed, local video segments into fixed time slots in a network feed 有权将压缩的本地视频片段拼接到网络供稿中的固定时隙公开(公告)号：US07188354B2
公开(公告)日：2007-03-06
申请号：US09912433
申请日：2001-07-25
CPC分类号： H04N21/2625 , H04N21/23406 , H04N21/23424 , H04N21/23608 , H04N21/2389 , H04N21/4385 , H04N21/44004 , H04N21/44016 , H04N21/812
摘要： A method for seamlessly splicing a local commercial segment into an existing network time slot, without decoder buffer overflow or underflow. The vbv_delay of the commercial segment is manipulated (e.g., for a minimum delay or a maximum delay). The pictures from the commercial segment are output for at least a portion of the associated network time slot duration. A determination is made regarding the number of pictures remaining in a stored portion of the incoming network feed or the commercial segment and the output rate is adjusted as required. The vbv_delay of the stored network feed or the vbv_delay of the local commercial segment is adjusted to match the vbv_delay of the incoming network feed.
摘要翻译： 一种将本地商业广告段无缝拼接成现有网络时隙的方法，无需解码器缓冲区溢出或下溢。 操纵商业片段的vbv_delay（例如，对于最小延迟或最大延迟）。 输出商业片段的图片至少部分相关的网络时隙持续时间。 确定进入网络馈送或广告段的存储部分中剩余的图像数量，并且根据需要调整输出速率。 存储的网络馈送的vbv_delay或本地商业广告段的vbv_delay被调整为匹配传入网络馈送的vbv_delay。
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6.发明授权Single clock reference for compressed domain processing systems with interspersed transport packets 有权用于具有散置传输数据包的压缩域处理系统的单时钟参考公开(公告)号：US06473007B2
公开(公告)日：2002-10-29
申请号：US09912432
申请日：2001-07-25
IPC分类号： H03M700
CPC分类号： H04N21/4302 , H04N7/52 , H04N21/242 , H04N21/4305
摘要： A system and method for generating a transport packet stream having an output formatted as an ASI group having a plurality of short and long ASI packets in a fixed sequence. The short and long ASI packet each have an associated transport packet and a fixed number of special idle characters and the transport packets are dispersed among the special idle characters.
摘要翻译： 一种用于产生传输分组流的系统和方法，该传输分组流具有格式化为具有固定序列中的多个短和长ASI分组的ASI组的输出。 短和长的ASI分组各自具有关联的传输分组和固定数量的特殊空闲字符，并且传输分组分散在特殊空闲字符之间。
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7.发明授权Symbol code generation processing from interframe DPCM of TDM'd spatial-frequency analyses of video signals 失效视频信号TDM'd空间频率分析的帧间DPCM的符号码生成处理
公开(公告)号：US4827336A
公开(公告)日：1989-05-02
申请号：US135184
申请日：1987-12-18
CPC分类号： H04N11/046 , H04N19/152 , H04N19/186 , H04N19/503 , H04N19/61 , H04N19/63 , H04N19/50
摘要： At a sending station in a digital television transmission system embodying the invention, time-division multiplexing either of the spatial-frequency analyses of the video signals from a television camera or of their interframe DPCM responses, both of which have uniform coding rates, is completed prior to symbol coding of interframe DPCM samples. This obviates the problems of time-division multiplexing symbol codes of variable length and of irregular coding rate. Time-division multiplexing is done so as to facilitate symbol coding protocols which include run-length encoding of DPCM samples. At a receiving station in the digital television transmission system time-division demultiplexing takes place after symbol decoding, being done on a per scan line basis.
摘要翻译： 在体现本发明的数字电视传输系统中的发送站，对来自电视摄像机的视频信号的空间频率分析或其帧间DPCM响应进行时分复用，均具有均匀的编码率 在帧间DPCM样本的符号编码之前。 这消除了可变长度和不规则编码率的时分复用符号码的问题。 进行时分复用，以便于包括DPCM样本的游程长度编码的符号编码协议。 在数字电视传输系统的接收站，在符号解码之后进行时分解复用，在每个扫描线的基础上进行。
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公开(公告)号：US5168356A
公开(公告)日：1992-12-01
申请号：US814207
申请日：1991-12-20
IPC分类号： H04J3/16 , H04N5/44 , H04N7/015 , H04N7/24 , H04N7/52 , H04N7/54 , H04N7/60 , H04N19/89 , H04N21/2383 , H04N21/2389 , H04N21/438 , H04N21/4385
CPC分类号： H04N21/2383 , H04J3/1605 , H04N19/37 , H04N19/89 , H04N21/23892 , H04N21/4382 , H04N21/4385 , H04N5/4401 , H04N7/54 , H04N7/015
摘要： A vide signal encoding system includes apparatus for segmenting encoded video data into transport blocks for signal transmission. The transport block format enhances signal recovery at the receiver by virtue of providing header data from which a receiver can determine re-entry points into the data stream on the occurrence of a loss or corruption of transmitted data. The number of re-entry points are maximized by providing secondary transport headers embedded within encoded video data in respective transport blocks.
摘要翻译： 视频信号编码系统包括用于将编码的视频数据分割成用于信号传输的传输块的装置。 传输块格式通过提供标题数据来增强接收机处的信号恢复，接收器可以在接收器发送发送的数据的丢失或损坏的情况下确定重入点到数据流中。 通过在相应传输块中嵌入编码视频数据内的辅助传输头来最大化重入点的数量。
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9.发明授权Line-sequential pyramid processing of a plurality of raster-scanned image variables 失效多个光栅扫描图像变量的线序金字塔处理
公开(公告)号：US4982283A
公开(公告)日：1991-01-01
申请号：US190905
申请日：1988-05-06
申请人： Alfonse A. Acampora
发明人： Alfonse A. Acampora
IPC分类号： H04N7/26 , H04N7/36 , H04N21/236 , H04N21/2368 , H04N21/434
CPC分类号： H04N19/186 , H04N19/503 , H04N19/63
摘要： A plurality of raster-scanned image variables are time-compressed and time-division multiplexed on a line-sequential basis for pyramid analysis. The resulting differential pulse code modulation is statistically encoded and assembled together with digital audio code and synchronizing code. The assembler supplies a serial stream of bits to a transmitter. Receiving apparatus for a video teleconferencing station includes a receiver complementary to the transmitter and a parser for separating digital codewords. Those codewords that are statistical codes descriptive of differential pulse code modulation of video are demodulated. The demodulation results are formatted for a pyramid synthesizer. The stream of samples provided as output signal from the pyramid synthesizer is time-division demultiplexed and time expanded to recover the plurality of raster-scanned image variables.
摘要翻译： 多个光栅扫描图像变量被以时间压缩的方式进行时间序列分组复用，用于金字塔分析。 所产生的差分脉冲编码调制被统计编码并与数字音频代码和同步代码组合在一起。 汇编器向发送器提供串行串行数据流。 用于视频电话会议台的接收装置包括与发射机互补的接收机和用于分离数字码字的解析器。 作为描述视频的差分脉冲编码调制的统计代码的码字被解调。 解调结果被格式化为金字塔合成器。 作为来自金字塔合成器的输出信号提供的样本流被时分解复用并且时间扩展以恢复多个光栅扫描图像变量。
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10.发明授权DPCM system with adaptive quantizer having unchanging bin number ensemble 失效具有自适应量化器的DPCM系统具有不变的箱号合并
公开(公告)号：US4897855A
公开(公告)日：1990-01-30
申请号：US127335
申请日：1987-12-01
申请人： Alfonse A. Acampora
发明人： Alfonse A. Acampora
CPC分类号： H04N19/00 , H03M3/042 , H04N19/152 , H04N19/587 , H04N19/59 , H04N19/50
摘要： Difference signals are coarsely quantized in a plurality of modes in a DPCM TV system. The fill and rate of fill of the transmitting rate buffer is monitored to prevent errors due to underflow and overflow of the transmitting rate buffer. The data rate is adaptively reduced in response to the rate of fill and fill by an adaptive coarse quantizer which is switched to a more coarse quantizing mode to reduce the transmit data rate. The coarse quantizing values are selected from among the members of the ensemble of values used for the least coarse quantizing mode. This avoids quantizer mode information having to be transmitted to the receiver and giving rise to additional transmitting overhead.
摘要翻译： 差分信号在DPCM TV系统中以多种模式进行粗量化。 监视发送速率缓冲器的填充和填充速率，以防止由于传输速率缓冲器的下溢和溢出引起的错误。 响应于自适应粗量化器的填充和填充速率自适应地降低数据速率，自适应粗量化器被切换到更粗略的量化模式以降低发送数据速率。 从用于最小粗量化模式的值的集合的成员中选择粗量化值。 这避免了量化器模式信息必须被发送到接收机并且引起额外的发送开销。
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