公开(公告)号：WO2003090469A2

公开(公告)日：2003-10-30

申请号：PCT/IB2003/001608

申请日：2003-04-15

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： CHEN, Yingwei ,  ZHONG, Zhun

IPC: H04N7/24

CPC classification number: H04N19/18 ,  H04N19/126 ,  H04N19/132 ,  H04N19/156 ,  H04N19/61

Abstract: A method and system (10) 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 (12). The prediction value is transformed (14) into a set of DCT coefficients. Prior to the quantizing step, the set of DCT coefficients are modified (14) according to predetermined criteria. To this end, the total energy level of the DCT coefficients excluding the lowest 2x2 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. Thereafter, the discarded column or row is assigned to a predetermined value. The modified DCT coefficients are then quantified (16) and encoded (20), thereby generating a bit stream of encoded macro-blocks, which are subsequently decoded according to a conventional decoding process.

Abstract translation: 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（10）。 在编码模式期间，接收数据块流，并且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（12）。 将预测值变换（14）成一组DCT系数。 在量化步骤之前，根据预定标准修改（14）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。 此后，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（16）并对其进行编码（20），从而生成经过编码的宏块的比特流，其随后根据传统的解码过程被解码。

公开(公告)号：WO2003021968A3

公开(公告)日：2003-03-13

申请号：PCT/IB2002/003507

申请日：2002-08-23

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： ZHONG, Zhun ,  CHEN, Yingwei

IPC: H04N7/26

Abstract: The present invention is directed to a method of scaling interlaced video. According to the present invention, the method includes a step (30) in which an interlaced video frame is divided into blocks, a step (32) for determining if any of the blocks correspond to a moving area in the interlaced video frame, a step (34) in which field-based scaling is performed on blocks corresponding to a moving area, and a step (36) in which frame-based scaling is performed on blocks not corresponding to a moving area.

公开(公告)号：WO2003010971A1

公开(公告)日：2003-02-06

申请号：PCT/IB2002/002609

申请日：2002-06-26

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

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

IPC: H04N7/26

CPC classification number: H04N19/577 ,  H04N19/132 ,  H04N19/156 ,  H04N19/176 ,  H04N19/18 ,  H04N19/48 ,  H04N19/59 ,  H04N19/90

Abstract: 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 are 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.

Abstract translation: 本发明涉及减少B帧解码。 根据本发明，减少B帧中的变换系数的数量以产生减少的B帧。 此外，对缩小的B帧进行逆扫描和逆量化。 此外，对缩小的B帧进行逆变换。 在本发明的一个实施例中，通过识别与B帧相关联的块并选择包括在所识别的块的预定区域中的变换系数来产生缩减的B帧。

公开(公告)号：WO2006013533A1

公开(公告)日：2006-02-09

申请号：PCT/IB2005/052500

申请日：2005-07-25

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  ZHONG, Zhun

Inventor： ZHONG, Zhun

IPC: H04L12/28

CPC classification number: H04W28/12 ,  H04W84/12

Abstract: A system and method for load balancing in wireless LANs is provided. The system and method uses a new management command comprising a management frame for load balancing purposes. The new "load balancing" management frame comprises a two part frame body: at least one AP Information set and at least one switch condition set. The switch condition set may further comprise specification of a predetermined algorithm.

Abstract translation: 提供了一种用于无线LAN中的负载平衡的系统和方法。 系统和方法使用包括用于负载平衡目的的管理帧的新的管理命令。 新的“负载平衡”管理帧包括两部分帧体：至少一个AP信息集和至少一个开关条件集合。 切换条件集还可以包括规定的预定算法。

公开(公告)号：WO2005125248A1

公开(公告)日：2005-12-29

申请号：PCT/IB2005/051931

申请日：2005-06-10

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  DEL PRADO PAVON, Javier ,  CHALLAPALI, Kiran ,  ZHONG, Zhun

Inventor： DEL PRADO PAVON, Javier ,  CHALLAPALI, Kiran ,  ZHONG, Zhun

IPC: H04Q7/36

CPC classification number: H04W16/14 ,  H04W28/16 ,  H04W36/16

Abstract: Wireless networks and their method of implementation include a first network and one or more networks. The first network assigns designated time slots to each of the one or more networks during which at least one device of at least one of the networks may communicate with at least one other device of its respective network.

Abstract translation: 无线网络及其实现方法包括第一网络和一个或多个网络。 第一网络将指定的时隙分配给一个或多个网络中的每个网络，在该网络期间，至少一个网络的至少一个设备可以与其相应网络的至少一个其他设备通信。

公开(公告)号：WO2004077718A3

公开(公告)日：2004-09-10

申请号：PCT/IB2004/000477

申请日：2004-02-23

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  ZHONG, Zhun ,  CHOI, Sunghyun

Inventor： ZHONG, Zhun ,  CHOI, Sunghyun

IPC: H04L12/56

Abstract: An apparatus and method are provided by the present invention for power management in an Independent Basic Service Set Wireless Local Area Network (WLAN). The present invention uses explicit booking by wireless stations and implicit booking by overhearing booking and data frame transmission conversations by the wireless stations to achieve higher throughput thereby optimizing power use in an IBSS WLAN for a given Ad-hoc Traffic Indication Message (ATIM) window size.

公开(公告)号：WO2004043016A3

公开(公告)日：2004-05-21

申请号：PCT/IB2003/004779

申请日：2003-10-27

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  U.S. PHILIPS CORPORATION

Inventor： ZHONG, Zhun ,  PORTOLES, Marc

IPC: H04L12/56

Abstract: In a wireless local area network (WLAN), the present invention provides a system and method for identifying traffic suffering from bad link quality and dynamically adjusting channel access to restrict the effect of this bad link quality. The dynamic adjustment to channel access is accomplished by lowering or raising the limit on the number of packets that can be transmitted between an AP and the wireless station over the a link as determined by the link quality. The link quality is determined by tracking the number of successive packet transmission successes and errors.

公开(公告)号：WO2003090469A3

公开(公告)日：2003-10-30

申请号：PCT/IB2003/001608

申请日：2003-04-15

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： CHEN, Yingwei ,  ZHONG, Zhun

IPC: H04N7/30

Abstract: A method and system (10) 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 (12). The prediction value is transformed (14) into a set of DCT coefficients. Prior to the quantizing step, the set of DCT coefficients are modified (14) according to predetermined criteria. To this end, the total energy level of the DCT coefficients excluding the lowest 2x2 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. Thereafter, the discarded column or row is assigned to a predetermined value. The modified DCT coefficients are then quantified (16) and encoded (20), thereby generating a bit stream of encoded macro-blocks, which are subsequently decoded according to a conventional decoding process.

公开(公告)号：WO2002051161A3

公开(公告)日：2002-06-27

申请号：PCT/IB2001/002316

申请日：2001-12-05

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： CHEN, Yi ,  ZHONG, Zhun

IPC: H04N7/50

Abstract: The present invention is directed to frame-type dependent (FTD) processing in which a different type of processing (including scaling) is performed according to the types (I, B, or P) of pictures or frames being processed. The basis for FTD processing is that errors in B pictures do not propagate to other pictures since decoded B pictures are not used as anchors for the other type of pictures. In other words, since I or P pictures do not depend on B pictures, any errors in a B picture are not spread to any other pictures. Therefore, the present invention puts more memory and processing power to pictures that are most critical to overall video quality.

公开(公告)号：WO2006051509A1

公开(公告)日：2006-05-18

申请号：PCT/IB2005/053749

申请日：2005-11-14

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  MANGOLD, Stephan ,  ZHONG, Zhun ,  DEL PRADO PAVON, Javier

Inventor： MANGOLD, Stephan ,  ZHONG, Zhun ,  DEL PRADO PAVON, Javier

IPC: H04L12/28

CPC classification number: H04W16/14 ,  H04W24/00

Abstract: A new type of measurement (150) recently adopted in the IEEE 802.11 wireless LAN standard is used by the a system and method that allows devices (301) to detect if microwave ovens (302) are operating in their vicinity. By scanning the medium, the devices (301) derive information about whether a commercial and/or residential microwave oven causes interference on the medium (310). The information is derived from the collected pattern of medium occupancy times that is characteristic of microwave ovens by using medium sensing histograms (150) defined by the standard.

Abstract translation: 最近在IEEE 802.11无线LAN标准中采用的新型测量（150）被允许设备（301）检测微波炉（302）在其附近操作的系统和方法。 通过扫描介质，设备（301）得到关于商业和/或住宅微波炉是否对介质（310）造成干扰的信息。 该信息是通过使用由该标准定义的介质感测直方图（150）从微波炉的特征的收集的中等占用时间的模式导出的。