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1. 发明授权

US06925126B2 Dynamic complexity prediction and regulation of MPEG2 decoding in a media processor 有权
标题翻译：媒体处理器中MPEG2解码的动态复杂度预测和调节
公开(公告)号：US06925126B2
公开(公告)日：2005-08-02
申请号：US09837036
申请日：2001-04-18
申请人： Tse-Hua Lan , Yingwei Chen , Zhun Zhong
发明人： Tse-Hua Lan , Yingwei Chen , Zhun Zhong
IPC分类号： G06T9/00 , H04N19/156 , H04N21/258 , H04N21/2662 , H04N21/462 , H04N7/12
CPC分类号： H04N21/4621 , H04N19/126 , H04N19/132 , H04N19/156 , H04N19/176 , H04N19/18 , H04N19/46 , H04N19/59 , H04N19/61 , H04N19/90 , H04N21/25808 , H04N21/2662
摘要： A method and system of regulating the computation load of an MPEG decoder in a video processing system are provided. The video processing system processes the header information of a compressed video data stream including a plurality of macroblocks with a motion vector associated therewith. Then, the computation load of each functional block of the MPEG decoder is adjusted according to predetermined criteria; thus, substantial computational overhead is desirably avoided.
摘要翻译：提供了一种在视频处理系统中调节MPEG解码器的计算负荷的方法和系统。视频处理系统处理包括具有与其相关联的运动矢量的多个宏块的压缩视频数据流的标题信息。然后，根据预定标准调整MPEG解码器的每个功能块的计算负荷; 因此，期望避免大量的计算开销。

2. 发明授权

US07020672B2 Reduced complexity IDCT decoding with graceful degradation 失效
公开(公告)号：US07020672B2
公开(公告)日：2006-03-28
申请号：US09823363
申请日：2001-03-30
申请人： Tse-Hua Lan , Zhun Zhong , Yingwei Chen
发明人： Tse-Hua Lan , Zhun Zhong , Yingwei Chen
IPC分类号： G06F17/14
CPC分类号： H04N19/625 , H04N19/122 , H04N19/126 , H04N19/132 , H04N19/137 , H04N19/156 , H04N19/176 , H04N19/18 , H04N19/44 , H04N19/59 , H04N19/61 , H04N19/90
摘要： Data compressed according to a lossy DCT-based algorithm, such as the MPEG or MPEG2 algorithms, is decompressed according to a dynamically-selected set of DCT coefficients, with unused coefficients masked out. A macroblock of the data exhibiting little motion is decompressed with a small subset of DCT coefficients, while a macroblock exhibiting more motion is decompressed using a larger subset of DCT coefficients up the full set of DCT coefficients. Average computational complexity is thus kept low, enabling the use of inexpensive equipment, while degradation is minimized.

3. 发明授权

US07016414B2 Method and system for skipping decoding of overlaid areas of video 失效
公开(公告)号：US07016414B2
公开(公告)日：2006-03-21
申请号：US10082859
申请日：2001-10-19
申请人： Yingwei Chen , Shaomin Peng , Tse-Hua Lan , Zhun Zhong
发明人： Yingwei Chen , Shaomin Peng , Tse-Hua Lan , Zhun Zhong
IPC分类号： H04N7/18
CPC分类号： H04N19/577 , H04N19/132 , H04N19/139 , H04N19/157 , H04N19/159 , H04N19/17 , H04N19/172 , H04N19/23 , H04N19/46 , H04N19/587
摘要： A system and method that reduces computational complexity of a decoder by identifying a skippable region in an overlaid area. The invention provides a system for processing encoded video data, comprising: an analysis system that determines if a current video frame having an overlaid area acts as a reference for future video frames; and a system for identifying a skippable region in the overlaid area. The invention may also include a system for identifying a portion of the overlaid area as the skippable based on analysis of motion vectors or motion vector ranges.

4. 发明授权

US06985635B2 System and method for providing a single-layer video encoded bitstreams suitable for reduced-complexity decoding 有权
标题翻译：用于提供适合于复杂度降低的解码的单层视频编码比特流的系统和方法
公开(公告)号：US06985635B2
公开(公告)日：2006-01-10
申请号：US10127528
申请日：2002-04-22
申请人： Yingwei Chen , Zhun Zhong
发明人： Yingwei Chen , Zhun Zhong
IPC分类号： G06K9/36 , G06K9/46
CPC分类号： H04N19/18 , H04N19/126 , H04N19/132 , H04N19/156 , H04N19/61
摘要： A method and system of reducing the computation load of an MPEG decoder by changing the encoding algorithms in a video-processing system are provided. During an encoding mode, a stream of data blocks is received and at least one motion vector and one motion compensation prediction value for each macro-block are generated. The prediction value is transformed into a set of DCT coefficients. Prior to the quantizing step, the set of DCT coefficients are modified according to predetermined criteria. To this end, the total energy level of the DCT coefficients excluding the lowest 2×2 DCT coefficients is computed, and last column and last row of the DCT coefficients is discarded alternatively until the total energy level of the DCT coefficients reaches a predetermined energy level. Therafter, the discarded column or row is assigned to a predetermined value. The modified DCT coefficients are then quantized and encoded, thereby generating a bit stream of encoded macro-blocks, which are subsequently decoded according to a conventional decoding process.
摘要翻译：提供了通过改变视频处理系统中的编码算法来减少MPEG解码器的计算负荷的方法和系统。在编码模式期间，接收数据块流，并生成每个宏块的至少一个运动矢量和一个运动补偿预测值。将该预测值变换为一组DCT系数。在量化步骤之前，根据预定标准修改DCT系数集合。为此，计算除最低2×2 DCT系数之外的DCT系数的总能级，并且DCT系数的最后一行和最后一行被替换地丢弃，直到DCT系数的总能级达到预定的能级。 Therafter将丢弃的列或行分配给预定值。然后对经修改的DCT系数进行量化和编码，从而生成经编码的宏块的比特流，其随后根据常规解码过程进行解码。

5. 发明授权

US07079692B2 Reduced complexity video decoding by reducing the IDCT computation in B-frames 失效
公开(公告)号：US07079692B2
公开(公告)日：2006-07-18
申请号：US09912131
申请日：2001-07-24
申请人： Tse-Hua Lan , Zhun Zhong , Yingwei Chen
发明人： Tse-Hua Lan , Zhun Zhong , Yingwei Chen
IPC分类号： G06K9/36
CPC分类号： H04N19/577 , H04N19/132 , H04N19/156 , H04N19/176 , H04N19/18 , H04N19/48 , H04N19/59 , H04N19/90
摘要： The present invention is directed to reduced B-frame decoding. According to the present invention, the number of transform coefficients in B-frames are reduced to produce reduced B-frames. Also, inverse scanning and inverse quantization is performed on the reduced B-frames. Further, an inverse transform is performed on the reduced B-frames. In one embodiment of the present invention, the reduced B-frames are produced by identifying blocks associated with the B-frames and selecting transform coefficients included in a predetermined area of the identified blocks.

6. 发明授权

US06608867B2 Detection and proper scaling of interlaced moving areas in MPEG-2 compressed video 有权
标题翻译： MPEG-2压缩视频中隔行移动区域的检测和适当缩放
公开(公告)号：US06608867B2
公开(公告)日：2003-08-19
申请号：US09823361
申请日：2001-03-30
申请人： Zhun Zhong , Tse-hua Lan , Yingwei Chen
发明人： Zhun Zhong , Tse-hua Lan , Yingwei Chen
IPC分类号： H04N712
CPC分类号： H04N19/137 , H04N19/112 , H04N19/61
摘要： The present invention provides a method of and system for determining whether a local area of a compressed video stream represented by a plurality of DCT encoded blocks subject to decoding and filtering/scaling is a stationary area or an interlaced moving area. Further, given such information, the invention relates to dynamically switching between frame- or field-based operations in a smart way, thus optimizing the output picture quality. Also, a DCT-domain-filtering scheme for field-based filtering/scaling of frame-DCT data is provided herein.
摘要翻译：本发明提供了一种用于确定经过解码和滤波/缩放的多个DCT编码块表示的压缩视频流的局部区域是静止区域还是隔行移动区域的方法和系统。此外，给定这样的信息，本发明涉及以智能方式动态地切换基于帧或场的操作，从而优化输出画面质量。此外，本文提供了用于帧DCT数据的基于场的滤波/缩放的DCT域滤波方案。

7. 发明申请

US20060155794A1 Reduced complexity IDCT decoding with graceful degradation 审中-公开
公开(公告)号：US20060155794A1
公开(公告)日：2006-07-13
申请号：US11338023
申请日：2006-01-24
申请人： Tse-Hua Lan , Zhun Zhong , Yingwei Chen
发明人： Tse-Hua Lan , Zhun Zhong , Yingwei Chen
IPC分类号： G06F17/14
CPC分类号： H04N19/625 , H04N19/122 , H04N19/126 , H04N19/132 , H04N19/137 , H04N19/156 , H04N19/176 , H04N19/18 , H04N19/44 , H04N19/59 , H04N19/61 , H04N19/90
摘要： Data compressed according to a lossy DCT-based algorithm, such as the MPEG or MPEG2 algorithms, is decompressed according to a dynamically-selected set of DCT coefficients, with unused coefficients masked out. A macroblock of the data exhibiting little motion is decompressed with a small subset of DCT coefficients, while a macroblock exhibiting more motion is decompressed using a larger subset of DCT coefficients up the full set of DCT coefficients. Average computational complexity is thus kept low, enabling the use of inexpensive equipment, while degradation is minimized.

8. 发明授权

US06980599B2 Video decoding system and method having post-processing to reduce sharpness prediction drift 失效
标题翻译：具有后处理以降低锐度预测漂移的视频解码系统和方法
公开(公告)号：US06980599B2
公开(公告)日：2005-12-27
申请号：US10161795
申请日：2002-06-04
申请人： Zhun Zhong , Yingwei Chen
发明人： Zhun Zhong , Yingwei Chen
IPC分类号： H04N7/26 , H04N7/46 , H04B1/66
CPC分类号： H04N19/59 , H04N19/156 , H04N19/428 , H04N19/80
摘要： A video processing system comprising: a decoder having a complexity reduction system; and a post-processing system for processing an output of the decoder, wherein the post-processing system includes a filter for intentionally blurring a set of frames in a group of pictures (GOP) to achieve a smooth visual transition between frames.
摘要翻译：一种视频处理系统，包括：具有复杂度降低系统的解码器; 以及用于处理解码器的输出的后处理系统，其中后处理系统包括用于有意地模糊一组图像（GOP）中的一组帧的滤波器，以实现帧之间的平滑视觉转换。

9. 发明授权

US06909750B2 Detection and proper interpolation of interlaced moving areas for MPEG decoding with embedded resizing 有权
标题翻译：用于具有嵌入式调整大小的MPEG解码的隔行移动区域的检测和适当插值
公开(公告)号：US06909750B2
公开(公告)日：2005-06-21
申请号：US09846528
申请日：2001-05-01
申请人： Zhun Zhong , Yingwei Chen , Tse-Hua Lan
发明人： Zhun Zhong , Yingwei Chen , Tse-Hua Lan
IPC分类号： H04N7/32 , G06T9/00 , H03M7/36 , H04N7/01 , H04N7/26 , H04N7/36 , H04N7/50 , H04N7/12 , H04N11/02
CPC分类号： H04N7/014 , H04N19/105 , H04N19/112 , H04N19/137 , H04N19/503 , H04N19/61
摘要： The present invention is directed to MPEG decoding with embedded resizing that includes detecting and interpolating moving areas in interlaced video in order to eliminate irregularities in the output video. According to the present invention, the decoding includes down scaling a motion vector. Also, detecting a moving area in an interlaced video reference frame and modifying the reduced resolution motion vector. Further, retrieving pixel values from the interlaced video reference frame according to the modified motion vector.
摘要翻译：本发明涉及具有嵌入式调整大小的MPEG解码，其包括在隔行视频中检测和内插移动区域，以消除输出视频中的不规则性。根据本发明，解码包括向下缩放运动矢量。此外，检测隔行视频参考帧中的移动区域并修改缩小的分辨率运动矢量。此外，根据经修改的运动矢量从隔行视频参考帧中检索像素值。

10. 发明申请

US20070121777A1 Methods to resolve tsf timer ambiguity of ieee 802.11e schedule element 有权
标题翻译：解决ieee 802.11e调度元素的tsf定时器模糊度的方法
公开(公告)号：US20070121777A1
公开(公告)日：2007-05-31
申请号：US10572925
申请日：2004-09-20
申请人： Javier Del Prado Pavon , Amjad Soomro , Sai Nandagopalan , Stefan Mangold , Zhun Zhong
发明人： Javier Del Prado Pavon , Amjad Soomro , Sai Nandagopalan , Stefan Mangold , Zhun Zhong
IPC分类号： G04F10/04
CPC分类号： H04W56/00 , H04W72/12
摘要： A plurality of methods, computer program product, and apparatus that use a lower 32 bit field of a 64-bit 802.11 TSF timer, so as to encode the reference time instant without the ambiguity as to whether there the reference time is referring to a future time or a past time. According to an aspect of the present invention, the fact that the low order 32 bits of the TSF timer wraps over in about 71 minutes is exploited to remove any ambiguity in the reference times contained in the Schedule Element frame. One method employs an algorithm base on distance between two reference points to determine whether the timer has wrapped around a time period, and another method uses a delay interval or a timeout to determine whether or not the TSF timer is wrapped or unwrapped. Another method includes determining whether an absolute value of X−O is less than, or greater than or equal to maximum value M/2.
摘要翻译：使用64位802.11 TSF定时器的低32位字段的多种方法，计算机程序产品和装置，以便对参考时刻进行编码，而不存在关于参考时间是指未来的歧义时间或过去的时间。根据本发明的一个方面，利用了大约71分钟内TSF定时器的低阶32位包裹的事实来消除包含在时间表元素帧中的参考时间中的任何歧义。一种方法采用基于两个参考点之间的距离的算法来确定定时器是否已经缠绕了一段时间，另一种方法使用延迟间隔或超时来确定TSF定时器是否被包装或解包。另一方法包括确定X-O的绝对值是否小于或大于或等于最大值M / 2。

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