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公开(公告)号：US06233256B1
公开(公告)日：2001-05-15
申请号：US08816457
申请日：1997-03-12
IPC分类号： H04J307
CPC分类号： H04L43/0847 , H04J3/0632 , H04L43/00 , H04L43/045 , H04L43/06 , H04L43/087 , H04L43/0882 , H04L43/0888 , H04L43/106 , H04L43/18 , H04L2012/5616 , H04L2012/5636 , H04L2012/5674 , H04L2012/5684 , H04Q11/0478
摘要： A method and apparatus for analyzing and monitoring packet streams in “real time”. The packet analyzer comprises an input buffer, a real-time analysis unit, a non-real-time analysis unit, a graphics unit, a monitor and a flushing circuit. A packet stream is received into the input buffer where the data is either read by the real-time analysis unit or flushed by the flushing circuit. Messages are passed between the real-time analysis unit and the non-real-time analysis unit to report on detected errors or to update packet stream information. In turn, real time packet stream information are displayed and updated on a display via the graphic unit. A method of detecting framing errors in a packet stream is incorporated by setting a 9th bit in the input buffer for each byte of data in a packet.
摘要翻译： 一种用于“实时”分析和监视分组流的方法和装置。 分组分析器包括输入缓冲器，实时分析单元，非实时分析单元，图形单元，监视器和冲洗电路。 分组流被接收到输入缓冲器中，其中数据被实时分析单元读取或被冲洗电路冲洗。 消息在实时分析单元和非实时分析单元之间传递，以报告检测到的错误或更新分组流信息。 反过来，通过图形单元在显示器上显示和更新实时分组流信息。 通过在分组中为数据的每个字节设置输入缓冲器中的第9位来合并检测分组流中的成帧错误的方法。
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公开(公告)号：US06400400B1
公开(公告)日：2002-06-04
申请号：US08902965
申请日：1997-07-30
IPC分类号： H04N1700
CPC分类号： H04N17/004
摘要： An apparatus and concomitant method for creating and applying an encoded bitstream to evaluate the performance of a black box video decoder. The encoded bitstreams are designed such that the results from the DUT can be evaluated without the need of a human observer. The method applies the encoded bitstream to both a DUT and a compliant reference decoder and compares the results from both decoders to determine compliance of the DUT. Additional embodiments address postprocessing and the selection of a subset of test frames for evaluation.
摘要翻译： 一种用于创建和应用编码比特流以评估黑盒视频解码器的性能的装置和并发方法。 编码比特流被设计成使得可以在不需要人类观察者的情况下评估来自DUT的结果。 该方法将编码的比特流应用于DUT和兼容参考解码器，并比较来自两个解码器的结果以确定DUT的符合性。 另外的实施例涉及后处理和用于评估的测试帧子集的选择。
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3.发明授权
公开(公告)号：US6100940A
公开(公告)日：2000-08-08
申请号：US123238
申请日：1998-07-28
CPC分类号： H04N19/198 , H04N19/114 , H04N19/142 , H04N19/162 , H04N19/177 , H04N19/179 , H04N19/192 , H04N19/196 , H04N19/40 , H04N19/46 , H04N19/61 , H04N19/63 , H04N19/64 , H04N19/87 , H04N19/10 , H04N19/107 , H04N19/115 , H04N19/13 , H04N19/146 , H04N19/152 , H04N19/60 , H04N19/91
摘要： A method and apparatus for pre-processing an image sequence to extract side information concerning the image sequence. In one embodiment, the side information is inserted into the image sequence, such that upon being encoded at a later time, the encoder can utilize the side information to best select one or more coding parameters. Alternatively, the side information can be stored on a storage device and is then made available to an encoder that is tasked with encoding the image sequence.
摘要翻译： 一种用于预处理图像序列以提取关于图像序列的侧面信息的方法和装置。 在一个实施例中，侧信息被插入到图像序列中，使得在稍后编码时，编码器可以利用边信息来最佳地选择一个或多个编码参数。 或者，侧面信息可以存储在存储设备上，然后使其可用于编码图像序列的编码器。
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公开(公告)号：US07996234B2
公开(公告)日：2011-08-09
申请号：US10926572
申请日：2004-08-26
IPC分类号： G10L21/00
CPC分类号： G10L19/24 , H04N21/2335 , H04N21/23614 , H04N21/2368 , H04N21/4341 , H04N21/4348 , H04N21/4621
摘要： A method and apparatus for producing a variable bit rate audio signal is disclosed. An audio signal is encoded into a plurality of encoded audio signals at different bit rates. A variable bit rate audio signal is produced by selecting between the plurality of encoded audio frames of different bit rates in accordance with a selection criterion.
摘要翻译： 公开了一种用于产生可变比特率音频信号的方法和装置。 音频信号以不同的比特率被编码成多个编码的音频信号。 通过根据选择标准在不同比特率的多个编码音频帧之间进行选择来产生可变比特率音频信号。
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公开(公告)号：US06219067B1
公开(公告)日：2001-04-17
申请号：US09143912
申请日：1998-08-31
IPC分类号： H04N591
CPC分类号： H04N17/004 , H04N5/04 , H04N21/4307
摘要： Compressed bitstreams are characterized by generated graphical displays that display useful information related, for example, to the quality of the data contained in the bitstream. One set of graphical displays indicates lead time between receipt of packetized data and the corresponding decode or presentation time-stamp. Another set of bar graphical displays provides information related to bits per picture by (A) indicating fractions of useful bits versus zero-stuffing bits per picture, (B) distinguishing field pictures from frame pictures, and (C) plotting bars as a function of presentation or decode time rather than picture number to indicate the presence of 3:2 pulldown frame structure in the bitstream. Yet another set of graphical displays corresponds to coefficient/quantization (C/Q) diagrams that plot combinations of quantization level and number of non-zero quantized coefficients for sets of picture blocks.
摘要翻译： 压缩比特流的特征在于生成的图形显示器，其显示与例如包含在比特流中的数据的质量相关的有用信息。 一组图形显示表示接收分组数据与相应的解码或呈现时间戳之间的提前时间。 另一组条形图形显示器通过（A）指示有用位的分数与每图像的零填充位相比提供与每个图像的位相关的信息，（B）区分场图像与帧图像，以及（C）绘制条作为 表示或解码时间而不是图像号，以指示位流中存在3：2下拉帧结构。 另一组图形显示对应于绘制图像块集合的量化级别和非零量化系数数量的组合的系数/量化（C / Q）图。
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公开(公告)号：US20110173013A1
公开(公告)日：2011-07-14
申请号：US13069248
申请日：2011-03-22
IPC分类号： G10L19/00
CPC分类号： G10L19/24 , H04N21/2335 , H04N21/23614 , H04N21/2368 , H04N21/4341 , H04N21/4348 , H04N21/4621
摘要： A method and apparatus for producing a variable bit rate audio signal is disclosed. An audio signal is encoded into a plurality of encoded audio signals at different bit rates. A variable bit rate audio signal is produced by selecting between the plurality of encoded audio frames of different bit rates in accordance with a selection criterion.
摘要翻译： 公开了一种用于产生可变比特率音频信号的方法和装置。 音频信号以不同的比特率被编码成多个编码的音频信号。 通过根据选择标准在不同比特率的多个编码音频帧之间进行选择来产生可变比特率音频信号。
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公开(公告)号：US20090028232A1
公开(公告)日：2009-01-29
申请号：US12091875
申请日：2006-10-30
IPC分类号： H04B17/00
CPC分类号： H04N17/04 , H04N17/004
摘要： A system and method of evaluating a decoder under test can include the steps of storing a first segment of a video sequence for creating a first test frame portion including a first image, storing a second segment of video sequence for creating a second test frame portion including a second image, combining the first and second test frame portions into a visualization segment, streaming the visualization segment to the decoder, displaying the resultant output stream from the decoder under test, and determining if a defect exists in the displayed decoded output stream. Determining if a defect exists can include: if the display of the displayed visualization segment shows a steady picture, then determining there is a defect in the decoded picture, and if the display of the visualization segment shows flickering or flashing detail, then determining that there is a defect in the decoded picture.
摘要翻译： 评估被测解码器的系统和方法可以包括以下步骤：存储用于创建包括第一图像的第一测试帧部分的视频序列的第一段，存储用于创建第二测试帧部分的第二视频序列段，包括 第二图像，将第一和第二测试帧部分组合成可视化段，将可视化段传送到解码器，显示来自被测解码器的结果输出流，以及确定显示的解码输出流中是否存在缺陷。 确定是否存在缺陷可以包括：如果显示的可视化段的显示显示稳定的图像，则确定解码图像中存在缺陷，并且如果可视化段的显示显示闪烁或闪烁的细节，则确定在那里 是解码图片的缺陷。
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8.发明授权公开(公告)号：US06233278B1
公开(公告)日：2001-05-15
申请号：US09629300
申请日：2000-07-31
IPC分类号： H04B166
CPC分类号： H04N19/198 , H04N19/10 , H04N19/107 , H04N19/114 , H04N19/115 , H04N19/13 , H04N19/142 , H04N19/146 , H04N19/152 , H04N19/162 , H04N19/177 , H04N19/179 , H04N19/192 , H04N19/196 , H04N19/40 , H04N19/46 , H04N19/60 , H04N19/61 , H04N19/63 , H04N19/64 , H04N19/87 , H04N19/91
摘要： A method and apparatus for pre-processing an image sequence to extract side information concerning the image sequence is disclosed. In one embodiment, the side information is inserted into the image sequence, such that upon being encoded at a later time, the encoder can utilize the side information to best select one or more coding parameters. Alternatively, the side information can be stored on a storage device and is then made available to an encoder that is tasked with encoding the image sequence.
摘要翻译： 公开了一种用于预处理图像序列以提取关于图像序列的侧面信息的方法和装置。 在一个实施例中，侧信息被插入到图像序列中，使得在稍后编码时，编码器可以利用边信息来最佳地选择一个或多个编码参数。 或者，侧面信息可以存储在存储设备上，然后使其可用于编码图像序列的编码器。
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公开(公告)号：US5767746A
公开(公告)日：1998-06-16
申请号：US660300
申请日：1996-06-07
CPC分类号： H03L7/093 , H03L7/113 , H03L7/181 , H04N21/4305
摘要： A method and apparatus for adjusting the parameters of a PLL in a communication system. The method measures the rate of transmission of clock reference information by measuring the time of arrival of successive clock references or the difference of the clock reference values. The method applies the measured transmission rate to a plurality of predefined transmission rate ranges to acquire the proper gain factor values. These gain factor values are used to control the responsiveness of the PLL to new clock reference information.
摘要翻译： 一种用于调整通信系统中PLL的参数的方法和装置。 该方法通过测量连续时钟参考的到达时间或时钟参考值的差异来测量时钟参考信息的传输速率。 该方法将测量的传输速率应用于多个预定义的传输速率范围以获得适当的增益因子值。 这些增益因子值用于控制PLL对新时钟参考信息的响应。
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公开(公告)号：US08275625B2
公开(公告)日：2012-09-25
申请号：US13069248
申请日：2011-03-22
IPC分类号： G10L21/00
CPC分类号： G10L19/24 , H04N21/2335 , H04N21/23614 , H04N21/2368 , H04N21/4341 , H04N21/4348 , H04N21/4621
摘要： A method and apparatus for producing a variable bit rate audio signal is disclosed. An audio signal is encoded into a plurality of encoded audio signals at different bit rates. A variable bit rate audio signal is produced by selecting between the plurality of encoded audio frames of different bit rates in accordance with a selection criterion.
摘要翻译： 公开了一种用于产生可变比特率音频信号的方法和装置。 音频信号以不同的比特率被编码成多个编码的音频信号。 通过根据选择标准在不同比特率的多个编码音频帧之间进行选择来产生可变比特率音频信号。
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