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1. 发明申请

WO0225950A3 LOAD BALANCING AND MODE SELECTION IN A MULTI-PROCESSOR VIDEO TRANSCODER 审中-公开
标题翻译：多处理器视频转换器中的负载平衡和模式选择
公开(公告)号：WO0225950A3
公开(公告)日：2003-08-28
申请号：PCT/US0125878
申请日：2001-08-20
申请人： GEN INSTRUMENT CORP , LIU VINCENT , NEMIROFF ROBERT S , WU SIU-WAI , LUTHRA AJAY , WANG LIMIN
发明人： LIU VINCENT , NEMIROFF ROBERT S , WU SIU-WAI , LUTHRA AJAY , WANG LIMIN
IPC分类号： H04N7/26 , H04N7/50
CPC分类号： H04N19/40 , H04N19/156 , H04N19/42 , H04N19/436 , H04N19/61
摘要： An efficient processing system, such as for transcoding video data. In an embodiment that is suitable for single or multiple processor embodiments, a processing mode is set for each input video frame, e.g., as a full transcode mode (740), which uses motion compensation, a requantization mode (755), which avoids motion compensation, or a bypass mode (750). The processing mode selection is based on a number or processing cycles that are available to process a frame, and an expected processing requirement of the frame. The bypass or requantization modes are selected to avoid a buffer overflow of the processor.
摘要翻译：一种高效的处理系统，例如用于对视频数据进行代码转换。在适用于单个或多个处理器实施例的实施例中，为每个输入视频帧设置处理模式，例如，使用运动补偿的全代码转换模式（740），避免运动的重新排序模式（755）补偿或旁路模式（750）。处理模式选择基于可用于处理帧的数量或处理周期以及帧的预期处理要求。选择旁路或再量化模式以避免处理器的缓冲区溢出。

2. 发明申请

WO0228108A3 STATISTICAL REMULTIPLEXING WITH BANDWIDTH ALLOCATION AMONG DIFFERENT TRANSCODING CHANNELS 审中-公开
标题翻译：带有不同转码通道的带宽分配的统计重新映射
公开(公告)号：WO0228108A3
公开(公告)日：2002-10-31
申请号：PCT/US0127243
申请日：2001-09-04
申请人： GEN INSTRUMENT CORP , WU SIU-WAI , NEMIROFF ROBERT S , LIU VINCENT , LUTHRA AJAY
发明人： WU SIU-WAI , NEMIROFF ROBERT S , LIU VINCENT , LUTHRA AJAY
IPC分类号： H04N7/26 , H04N7/50 , H04N21/236 , H04N21/2365 , H04N7/24
CPC分类号： H04N21/23608 , H04N19/115 , H04N19/126 , H04N19/15 , H04N19/152 , H04N19/176 , H04N19/196 , H04N19/197 , H04N19/40 , H04N19/61 , H04N21/23655
摘要： An efficient statistical remultiplexer for processing a number of channels that include video data. In one aspect, transcoding of the video data is delayed while statistical information is obtained from the data. Bit rate need parameters for the data are determined based on the statistical information, and the video data is transcoded (110, 112, 200, 300) based on the respective bit rate need parameters following the delay. In another aspect, a transcoding bit rate for video frames is updated a plurality of times at successive intervals to allow a closer monitoring of the bit rate. Minimum and maximum bounds for the transcoding bit rate, e.g., for buffer overflow and underflow protection, are also updated in each interval. In another aspect, the pre-transcoding quantization scales of the macroblocks in a frame are scaled to provide corresponding new quantization scales of the macroblocks in a frame are scaled to provide corresponding new quantization scales for transcoding based on a ratio of pre-transcoding amount of data in the frame and a target, post-transcoding amount of data for the frame. The quantization scales are adjusted for different poritons of the frame as transcoding progresses to ensure that a minimum amount of transcoding bandwidth is allocated to each macroblock.
摘要翻译：一种高效的统计再复用器，用于处理包含视频数据的多个通道。在一个方面，视频数据的转码被延迟，同时从数据获得统计信息。基于统计信息确定数据的比特率需求参数，并且基于延迟之后的相应比特率需要参数对视频数据进行代码转换（110,112,200,300）。在另一方面，用于视频帧的转码比特率以连续的间隔多次更新以允许对比特率进行更密切的监视。转码比特率的最小和最大范围（例如，用于缓冲区溢出和下溢保护）也在每个间隔中更新。另一方面，缩放帧中宏块的预代码转换量化比例以提供帧中宏块的对应新量化比例，以基于预编码转换量的比率来缩放以提供用于转码的对应新量化比例帧和目标中的数据，帧的转码后数据量。量化比例随着代码转换的进行而针对帧的不同区域进行调整，以确保将最小量的代码转换带宽分配给每个宏块。

3. 发明申请

WO0225952A3 REGENERATION OF PROGRAM CLOCK REFERENCE DATA FOR MPEG TRANSPORT STREAMS 审中-公开
标题翻译： MPEG运输流程序时钟参考数据的再生
公开(公告)号：WO0225952A3
公开(公告)日：2002-07-04
申请号：PCT/US0127191
申请日：2001-08-31
申请人： GEN INSTRUMENT CORP , NEMIROFF ROBERT S , LIU VINCENT , WU SIU-WAI
发明人： NEMIROFF ROBERT S , LIU VINCENT , WU SIU-WAI
IPC分类号： H04N7/26 , H04N21/2343 , H04N21/236 , H04N21/2365 , H04N7/24 , H04N7/58
CPC分类号： H04N21/2365 , H04N19/40 , H04N21/2343 , H04N21/23608
摘要： A system for providing an accurate time reference for multiple input and output digital video signals of a transcoder (100) that is particularly suited for use with MPEG data. The multiple streams are synchronized with a single master system time clock (155) at the transcoder (100). Timing data from the master clock is compared to timing data from packets that are input to the transcoder to determine an offset (120, 130). In particular, timing data, such as a program clock reference (PCR) field, is recovered from packets (104) of different channels that are input to the transcoder (122, 132). For each channel, timing data is then provided for packets (106) that are output from the transcoder based on the offset and timing data of the master clock (155) at the respective output times. In particular, the adjusted timing data is determined as a sum of the offset and an associated hardware error, less a delay (PcrSysDla) associated with the transcoder, which includes a lookahead delay and a buffer delay. The associated hardware error represents an error of the master clock and/or a system time clock of an encoder that encoded the particular channel.
摘要翻译：一种用于为特别适合于与MPEG数据一起使用的代码转换器（100）的多个输入和输出数字视频信号提供准确的时间基准的系统。多个流与代码转换器（100）处的单个主系统时钟（155）同步。将来自主时钟的定时数据与来自输入到代码转换器的分组的定时数据进行比较以确定偏移（120,130）。具体地，诸如节目时钟参考（PCR）字段的定时数据从输入到代码转换器（122,132）的不同信道的分组（104）中恢复。对于每个通道，随后基于在相应输出时间的主时钟（155）的偏移和定时数据从代码转换器输出的分组（106）提供定时数据。特别地，调整的定时数据被确定为偏移量和相关联的硬件错误之和，减去与代码转换器相关联的延迟（PcrSysDla），其包括前瞻延迟和缓冲延迟。相关联的硬件错误表示编码特定信道的编码器的主时钟和/或系统时钟的错误。

4. 发明申请

WO02100110A2 SPLICING OF DIGITAL VIDEO TRANSPORT STREAMS 审中-公开
标题翻译：数字视频传输流的分布
公开(公告)号：WO02100110A2
公开(公告)日：2002-12-12
申请号：PCT/US0215499
申请日：2002-05-14
申请人： GEN INSTRUMENT CORP , LIU VINCENT , NEMIROFF ROBERT S , WU SIU-WAI
发明人： LIU VINCENT , NEMIROFF ROBERT S , WU SIU-WAI
IPC分类号： H04N21/234 , H04N21/236 , H04N21/81 , H04N7/24
CPC分类号： H04N21/23608 , H04N21/23424 , H04N21/812
摘要： A mechanism for splicing advertisements, local programming and the like into a digital video transport stream is provided. In order to achieve proper splicing, an appropriate number of frames is inserted between bitstream to properly close a GOP of the first bistream into which a second bitstream carrying the spliced content is inserted. Program clock references (PCRS) of the bitstreams are adjusted as necessary in order to force continuity between the bistreams. For inserting advertisements, the PCR of the program stream and ad stream can be tracked, and the PCR of the program stream can be used both before and after splicing. For local program insertion (which are typically substantially longer than advertisements), the PCR of the local program can be used, after adjustment thereof with an offset to maintain continuity at the splice point. The PTS an/or DTS of the inserted bistream can be modified to keep them continuous at the splice point for both video and audio streams. The spliced bitstream is transcoded to maintain a desired output bit rate, and to provide overflow/underflow protection of the video buffers.
摘要翻译：提供了一种用于将广告，本地编程等拼接成数字视频传输流的机制。为了实现适当的拼接，在比特流之间插入适当数量的帧以恰当地关闭插入了拼接内容的第二比特流的第一双向流的GOP。根据需要调整比特流的编程时钟参考（PCRS），以便强制双向传送器之间的连续性。为了插入广告，可以跟踪节目流和广播流的PCR，并且可以在拼接之前和之后使用节目流的PCR。对于本地程序插入（其通常比广告更长），可以使用本地程序的PCR进行调整之后使用偏移量来保持拼接点的连续性。可以修改插入的双向流的PTS a /或DTS，以使它们在视频和音频流的拼接点处保持连续。拼接的比特流被转码以保持期望的输出比特率，并提供视频缓冲器的溢出/下溢保护。

5. 发明申请

WO2005067427A3 AUDIO SPLICE PROCESS FOR DIGITAL AD INSERTION 审中-公开
标题翻译：用于数字广告插入的音频播放过程
公开(公告)号：WO2005067427A3
公开(公告)日：2005-09-22
申请号：PCT/US2004023417
申请日：2004-07-20
申请人： GEN INSTRUMENT CORP , CHEN JINGYANG , NEMIROFF ROBERT S
发明人： CHEN JINGYANG , NEMIROFF ROBERT S
IPC分类号： H04N7/025 , H04N7/10 , H04N7/16
CPC分类号： H04N7/025 , H04N7/10 , H04N21/23424 , H04N21/2401 , H04N21/8106 , H04N21/812
摘要： A system and method for audio splicing (insertion) of an Ad audio stream in the compressed domain, where variable early delivery of the Ad audio stream and variable bit rate are allowed, without creating audio distortion, glitches, or other digital artefacts or errors, in the resultant audio stream is disclosed. The present system and method provides for a splice delay buffer which delays the first five Ad audio frames until transmission of the last frame of the primary audio stream, but before the splice time. Subsequent Ad audio frames are delayed by a fixed amount, where the fixed amount is greater than the frame delay of the primary audio stream, to allow for ease of splice back to the primary audio stream.
摘要翻译：用于音频拼接（插入）压缩域中的Ad音频流的系统和方法，其中允许可变的早期传送Ad音频流和可变比特率，而不产生音频失真，毛刺或其他数字伪像或错误，在所得到的音频流中被公开。本系统和方法提供了一种拼接延迟缓冲器，其将前五个Ad音频帧延迟，直到主音频流的最后一帧传输，但在拼接时间之前。随后的广告音频帧被延迟固定的量，其中固定量大于主音频流的帧延迟，以便容易地将主音频流连接起来。

6. 发明申请

WO2014066434A3 IMPROVED ALGORITHMS FOR DETERMINING BITRATE FOR A STATISTICAL MULTIPLEXING SYSTEM TO ACCOUNT FOR SIGNAL COMPLEXITY INCLUDING FILM MODE AND GOP STRUCTURAL CHANGES 审中-公开
标题翻译：用于确定用于统计复合系统的双向数据的改进的算法用于信号复杂性，包括电影模式和GOP结构变化
公开(公告)号：WO2014066434A3
公开(公告)日：2014-07-10
申请号：PCT/US2013066250
申请日：2013-10-22
申请人： GEN INSTRUMENT CORP
发明人： VAN VELDHUISEN BRENDA L , CHEN JING YANG , NEMIROFF ROBERT S
IPC分类号： H04N21/2365
CPC分类号： H04N19/146 , H04N21/23655
摘要： A statistical multiplexer (statmux) system for encoding multiple channels of digital television data is provided with improved algorithms for determining bitrate for encoding and decoding to account for signal complexity, including accounting for film mode and GOP structural changes. In film mode when the lower frame per second rate for film mode is identified, rather than faster rate SD or HD modes, instead of determining bit rate from viewing the next picture in the look ahead buffer (LAB), the system looks at a start time stamp for specific data in the LAB. Accounting for GOP structural changes includes identifying the number of pictures (N) between I type pictures in data provided to an encoder and the number of pictures (M) between P type pictures, rather than using a fixed number for N and M.
摘要翻译：提供了一种用于对多个数字电视数据进行编码的统计多路复用器（statmux）系统，用于确定编码和解码的比特率以解决信号复杂度的改进算法，包括计算胶片模式和GOP结构变化。在电影模式下，当识别电影模式的每秒低帧速率时，而不是更快速率的SD或HD模式，而不是确定在前瞻缓冲区（LAB）中查看下一个图像的比特率，系统会看起来 LAB中具体数据的时间戳。考虑GOP结构变化包括识别提供给编码器的数据中的I型图像之间的图像数（N）和P型图像之间的图像数（M），而不是使用固定数量的N和M.

7. 发明专利

CA2421794C STATISTICAL REMULTIPLEXING WITH BANDWIDTH ALLOCATION AMONG DIFFERENT TRANSCODING CHANNELS 未知
公开(公告)号：CA2421794C
公开(公告)日：2013-06-25
申请号：CA2421794
申请日：2001-09-04
申请人： GEN INSTRUMENT CORP
发明人： WU SIU-WAI , NEMIROFF ROBERT S , LIU VINCENT , LUTHRA AJAY
IPC分类号： H04N21/2365 , H04N7/26 , H04N7/50 , H04N21/236
摘要： An efficient statistical remultiplexer for processing a number of channels that include video data. In one aspect, transcoding of the video data is delayed while statistical information is obtained from the data. Bit rate need parameters for the data are determined based on the statistical information, and the video data is transcoded (110, 112, 200, 300) based on the respective bit rate need parameters following the delay. In another aspect, a transcoding bit rate for video frames is updated a plurality of times at successive intervals to allow a closer monitoring of the bit rate. Minimum and maximum bounds for the transcoding bit rate, e.g., for buffer overflow and underflow protection, are also updated in each interval. In another aspect, the pre-transcoding quantization scales of the macroblocks in a frame are scaled to provide corresponding new quantization scales of the macroblocks in a frame are scaled to provide corresponding new quantization scales for transcoding based on a ratio of pre-transcoding amount of data in the frame and a target, post-transcoding amount of data for the frame. The quantization scales are adjusted for different poritons of the frame as transcoding progresses to ensure that a minimum amount of transcoding bandwidth is allocated to each macroblock.

8. 发明专利

CA2449124A1 SPLICING OF DIGITAL VIDEO TRANSPORT STREAMS 未知
公开(公告)号：CA2449124A1
公开(公告)日：2002-12-12
申请号：CA2449124
申请日：2002-05-14
申请人： GEN INSTRUMENT CORP
发明人： NEMIROFF ROBERT S , LIU VINCENT , WU SIU-WAI
IPC分类号： H04N21/234 , H04N21/236 , H04N21/81 , H04N7/24 , H04N7/52
摘要： A mechanism for splicing advertisements, local programming and the like into a digital video transport stream is provided. In order to achieve proper splicing, an appropriate number of frames is inserted between bitstream to properly close a GOP of the first bistream into which a second bitstream carrying the spliced content is inserted. Program clock references (PCRS) of the bitstreams are adjusted as necessary in order to force continuity betwee n the bistreams. For inserting advertisements, the PCR of the program stream a nd ad stream can be tracked, and the PCR of the program stream can be used both before and after splicing. For local program insertion (which are typically substantially longer than advertisements), the PCR of the local program can be used, after adjustment thereof with an offset to maintain continuity at the splice point. The PTS an/or DTS of the inserted bistream can be modified to keep them continuous at the splice point for both video and audio streams. T he spliced bitstream is transcoded to maintain a desired output bit rate, and t o provide overflow/underflow protection of the video buffers.

9. 发明专利

CA2421794A1 STATISTICAL REMULTIPLEXING WITH BANDWIDTH ALLOCATION AMONG DIFFERENT TRANSCODING CHANNELS 未知
公开(公告)号：CA2421794A1
公开(公告)日：2002-04-04
申请号：CA2421794
申请日：2001-09-04
申请人： GEN INSTRUMENT CORP
发明人： LUTHRA AJAY , LIU VINCENT , NEMIROFF ROBERT S , WU SIU-WAI
IPC分类号： H04N7/26 , H04N7/50 , H04N21/236 , H04N21/2365 , H04N7/58 , H04N7/24
摘要： An efficient statistical remultiplexer for processing a number of channels that include video data. In one aspect, transcoding of the video data is delayed while statistical information is obtained from the data. Bit rate ne ed parameters for the data are determined based on the statistical information, and the video data is transcoded (110, 112, 200, 300) based on the respectiv e bit rate need parameters following the delay. In another aspect, a transcodi ng bit rate for video frames is updated a plurality of times at successive intervals to allow a closer monitoring of the bit rate. Minimum and maximum bounds for the transcoding bit rate, e.g., for buffer overflow and underflow protection, are also updated in each interval. In another aspect, the pre- transcoding quantization scales of the macroblocks in a frame are scaled to provide corresponding new quantization scales of the macroblocks in a frame are scaled to provide corresponding new quantization scales for transcoding based on a ratio of pre-transcoding amount of data in the frame and a target , post-transcoding amount of data for the frame. The quantization scales are adjusted for different poritons of the frame as transcoding progresses to ensure that a minimum amount of transcoding bandwidth is allocated to each macroblock.

10. 发明专利

CA2552312C METHOD AND APPARATUS FOR PROCESSING A BITSTREAM IN A DIGITAL VIDEO TRANSCODER 未知
公开(公告)号：CA2552312C
公开(公告)日：2013-03-26
申请号：CA2552312
申请日：2005-01-10
申请人： GEN INSTRUMENT CORP
发明人： NEMIROFF ROBERT S , WU SIU-WAI
IPC分类号： H04N7/12 , H04N7/26 , H04N7/50
摘要： [0052] A method and apparatus for processing a bitstream in a digital video transcoder is described. In one example, an adjustment factor is determined (408) that relates a number of bits representing a selected frame defined by the bitstream to a target number of bits for the selected frame. An average spatial activity value among sets of video data is associated (410) with the selected frame. A spatial activity value for a selected set of the sets of video data is determined (414). A normalized spatial activity value for the selected set of frequency video data is then computed (416) in response to the average spatial activity value, the spatial activity value, and a function of the adjustment factor. Target bit reduction for each of the sets of video data may be computed using a function of the normalized spatial activity value and the adjustment factor.

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