公开(公告)号：WO2002098135A1

公开(公告)日：2002-12-05

申请号：PCT/IB2002/001857

申请日：2002-05-24

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： ZHONG, Zhun

IPC: H04N7/24

CPC classification number: H04N19/90 ,  H04N19/112 ,  H04N19/117 ,  H04N19/16 ,  H04N19/172 ,  H04N19/48 ,  H04N19/527 ,  H04N19/80 ,  H04N19/86

Abstract: A system and method for filtering interlaced video in the DCT domain. The invention implements an even length symmetric filter necessary for filtering the bottom field of pixel data using the steps of: decomposing the even symmetric spatial filter design into two identical odd length symmetric filter designs have a one pixel phase difference therebetween; creating a discrete cosine transform (DCT) filter that corresponds to the odd length symmetric filter designs; filtering the field of interlaced video data in the DCT domain using DCT filter to create a set of filtered DCT data; converting the set of filtered DCT data into a set of spatial domain data; and filtering the spatial domain data with a (1,1) filter.

Abstract translation: 用于在DCT域中对隔行扫描视频进行滤波的系统和方法。 本发明实现了使用以下步骤对像素数据的底场进行滤波所必需的均匀长度对称滤波器：将均匀对称空间滤波器设计分解成两个相同的奇数长度对称滤波器设计之间具有一个像素相位差; 创建对应于奇数长度对称滤波器设计的离散余弦变换（DCT）滤波器; 使用DCT滤波器对DCT域中的隔行视频数据的场进行滤波，以创建一组滤波DCT数据; 将该滤波后的DCT数据转换成一组空间域数据; 并用（1,1）滤波器对空间域数据进行滤波。

公开(公告)号：WO2002089476A1

公开(公告)日：2002-11-07

申请号：PCT/IB2002/001465

申请日：2002-04-23

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： ZHONG, Zhun ,  CHEN, Yingwei ,  LAN, Tse-Hua

IPC: H04N7/01

CPC classification number: H04N7/014 ,  H04N19/105 ,  H04N19/112 ,  H04N19/137 ,  H04N19/503 ,  H04N19/61

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2002085031A1

公开(公告)日：2002-10-24

申请号：PCT/IB2002/001321

申请日：2002-04-11

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： LAN, Tse-Hua ,  CHEN, Yingwei ,  ZHONG, Zhun

IPC: H04N7/50

CPC classification number: H04N21/4621 ,  H04N19/126 ,  H04N19/132 ,  H04N19/156 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/59 ,  H04N19/61 ,  H04N19/90 ,  H04N21/25808 ,  H04N21/2662

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2002085028A3

公开(公告)日：2002-10-24

申请号：PCT/IB2002/001232

申请日：2002-04-04

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： ZHONG, Zhun

IPC: H04N7/26

Abstract: The present invention can complement and benefit virtually any method utilizing motion compensation to decode an inputted digital video data stream by determining a likely local nature of reference frame data area in the video data stream, and then applying proper interpolation to the reference frame data area according to the determined likely local nature of the reference frame data area. The present invention can also complement and benefit virtually any decoding system utilizing motion compensation to decode an inputted digital video data stream by providing a motion compensation predictor (550) that is adapted to determine a likely local nature of a reference frame data area in the video data stream, and then apply proper interpolation to the reference frame data area according to the determined likely local nature of the reference frame data area.

公开(公告)号：WO2002080569A2

公开(公告)日：2002-10-10

申请号：PCT/IB2002/001000

申请日：2002-03-26

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： LAN, Tse-Hua ,  ZHONG, Zhun ,  CHEN, Yingwei

IPC: H04N7/30

CPC classification number: H04N19/625 ,  H04N19/122 ,  H04N19/126 ,  H04N19/132 ,  H04N19/137 ,  H04N19/156 ,  H04N19/176 ,  H04N19/18 ,  H04N19/44 ,  H04N19/59 ,  H04N19/61 ,  H04N19/90

Abstract: 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.

Abstract translation: 根据动态选择的一组DCT系数对根据诸如MPEG或MPEG2算法之类的基于有损DCT的算法压缩的数据进行解压缩，并将未使用的系数屏蔽掉。 表现出很少运动的数据的宏块用DCT系数的小子集进行解压缩，而表现出更多运动的宏块在整个DCT系数集上用DCT系数的较大子集进行解压缩。 平均计算复杂度因此保持较低，使得使用便宜的设备成为可能，同时降低最小化。

公开(公告)号：WO2002080564A2

公开(公告)日：2002-10-10

申请号：PCT/IB2002/001176

申请日：2002-04-02

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： ZHONG, Zhun ,  LAN, Tse-Hua ,  CHEN, Yingwei

IPC: H04N7/26

CPC classification number: H04N19/137 ,  H04N19/112 ,  H04N19/61

Abstract: 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.

Abstract translation: 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。