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1. 发明申请

WO2007025476A1 多媒体通信的传输保护方法审中-公开
公开(公告)号：WO2007025476A1
公开(公告)日：2007-03-08
申请号：PCT/CN2006/002232
申请日：2006-08-30
申请人：华为技术有限公司 , 罗忠 , 杨付正 , 万帅 , 常义林
发明人：罗忠 , 杨付正 , 万帅 , 常义林
IPC分类号： H04N7/24
CPC分类号： H04N19/89 , H04N19/467
摘要： An transport protection method for multimedia video or still image communication in multimedia communication field, can improve quality of multimedia communication service with the precondition of no burden increase of communication systems or network. Wherein, the key data information is concealed in encoded key-not data information in the compressed images by using digital watermark technique; and the normally transmitted key data is detected right or not through the key data protection backup protected by digital watermarks, therefore, error in transport can be detected; the blocks at the same position in the fore-and-aft block groups are performed reciprocal backup circularly; the motion vector is performed encode, then is embedded into the DCT transform coefficients correspondingly unimportant with form of digital watermark, at the same time, it must ensure the video data not to be influenced as possible; when happened error, if the key data backup is right, it will be used to displace the original key data directly, if not, the average value of the neighbor block key data in the same frame will be used to displace the original key data approximatively.

2. 发明申请

WO2007000103A1 一种多媒体视频通信的质量检测方法审中-公开
公开(公告)号：WO2007000103A1
公开(公告)日：2007-01-04
申请号：PCT/CN2006/001433
申请日：2006-06-23
申请人：华为技术有限公司 , 杨付正 , 罗忠 , 万帅 , 常义林
发明人：杨付正 , 罗忠 , 万帅 , 常义林
IPC分类号： H04N1/56
CPC分类号： H04N17/004 , G06T1/0028 , G06T2201/0051 , G06T2201/0061 , G06T2201/0083 , G06T2201/0202
摘要： A method for detecting the quality of the multimedia communication is disclosed. Sais method objectively represents the quality of the multimedia communication by inserting and extracting the watermark without the influence of the quality of the multimedia video data. Every frame of the multimedia data is uniformly blocked and the watermark is inserted to every block to realize the uniform distribution of the watermark. The multimedia data is multiframe grouped and the watermark is inserted into part frames of the every group with equal interval to further reduce the influence of the watermark to the data. The watermark information is directly inserted into the spatial domain of the original multimedia data. The PSNR of the multimedia data is fitted with the accuracy rate of the comparison of the recovered watermark and the original watermark as the measurement standard of quality of the multimedia communication. A post-processing is made on the video image after extracting the watermark, such as smoothed filtering, to remove the influence of the watermark to the multimedia data.

3. 发明申请

WO2006133613A1 一种降低图像方块效应的方法审中-公开
公开(公告)号：WO2006133613A1
公开(公告)日：2006-12-21
申请号：PCT/CN2006/000650
申请日：2006-04-11
申请人：华为技术有限公司 , 罗忠 , 杨付正 , 万帅 , 常义林
发明人：罗忠 , 杨付正 , 万帅 , 常义林
IPC分类号： H04N7/30 , G06T9/00 , G06T5/00
CPC分类号： H04N19/527
摘要：本发明公开了一种降低图像方块效应的方法，该方法包括以下步骤：A．在当前图像中选取需要处理的图像块，并确定量化后的DCT系数的取值范围；B．根据所选取的图像块及其相邻图像块的像素值，在所述取值范围内调整所选取的图像块的量化后的DCT系数，得到量化结果；C．根据所述量化结果继续进行图像的压缩编码。本发明根据DCT变换的性质调整DCT系数的量化以降低方块效应，有效改善了视频的主观质量和客观质量，而且不会引入额外的视频模糊。本发明方法中的算法计算复杂度较低，提高了处理的效率。另外，本发明的方法与标准兼容，不需要对解码器做任何调整；在降低方块效应的同时，不会损伤图像的细节。

4. 发明申请

WO2006111087A1 基于H.264的压缩视频传输误码消除方法审中-公开
公开(公告)号：WO2006111087A1
公开(公告)日：2006-10-26
申请号：PCT/CN2006/000722
申请日：2006-04-19
申请人：华为技术有限公司 , 罗忠 , 宋彬 , 常义林 , 周宁兆
发明人：罗忠 , 宋彬 , 常义林 , 周宁兆
IPC分类号： H04N7/64
CPC分类号： H04N19/89 , H04N19/107 , H04N19/164 , H04N19/174 , H04N19/61
摘要： The present invention discloses an error eliminating method for compressed video transmission, and further discloses such an error eliminating method based on H.264 for compressed video transmission that error can be eliminated in an uncomplicated and highly efficient way. In the present invention, error elimination is realized by an error information feedback mechanism combined with error concealment and error propagation restraint. Error generation is detected via the NALU sequence number and the information carrying Slice, and the error information statistics e.g. the position of the lost data is analyzed. By defining the extended SEI message, the internal feedback path for the error information is established in a H.264 system. By performing intra-frame encoding refreshment for the slices divided up time by time, error propagation restraint is realized.

5. 发明申请

WO2006111063A1 基于纠删码的数据传输保护方法审中-公开
公开(公告)号：WO2006111063A1
公开(公告)日：2006-10-26
申请号：PCT/CN2006/000389
申请日：2006-03-14
申请人：华为技术有限公司 , 罗忠 , 宋彬 , 常义林
发明人：罗忠 , 宋彬 , 常义林
IPC分类号： H03M13/00
CPC分类号： H03M13/1102 , H03M13/3761
摘要：本发明提供一种基于纠删码的数据传输保护方法，其核心为：设置仅具有一层校验节点层的纠删码，并根据所述纠删码进行数据传输保护。本发明在确保数据传输保护能力没有显著下降的情况下，通过设置仅具有一层校验节点层的纠删码，从而有效减少了纠删码生成校验节点层的运算量，大大降低了数据传输的延时，使数据传输保护的性价比得到提高，进而使本发明的数据传输保护方法能够很好地适用于H.263以及H.264等技术领域，提高了数据传输的效率，并且促进了H.264等新技术的应用。

6. 发明申请

WO2006105713A1 基于H.264的视频传输保护方法审中-公开
公开(公告)号：WO2006105713A1
公开(公告)日：2006-10-12
申请号：PCT/CN2006/000536
申请日：2006-03-29
申请人：华为技术有限公司 , 罗忠 , 宋彬 , 周宁兆 , 常义林
发明人：罗忠 , 宋彬 , 周宁兆 , 常义林
IPC分类号： H04N7/14
CPC分类号： H03M13/353 , H03M13/373 , H03M13/3761 , H04N7/147 , H04N7/148 , H04N19/102 , H04N19/166 , H04N19/61 , H04N19/89
摘要： The invention discloses video transmission protection technique, especially a video transmission protection method based on H.264, so that video stream protection strategy can be adjusted adaptively according to network communication condition, thus it achieves high efficiency and high reliability of video transmission effect. In the invention, receiver counts communication quality and feeds it back to transmitter, then the transmitter adaptively adjust protection strategy; the receiver counts accumulated packet-lost rate and position information of lost data according to discontinuous situation of NALU sequence number; the receiver feeds statistic information back to the transmitter by expansion of SEI message; the transmitter sets two groups of protection strategy series to protect key data and non-key data separately, and selects appropriate level of protection strategy according to fedback accumulated packet-lost rate; the receiver sends position information of lost data back to the transmitter, then the transmitter retransmits these lost data.

7. 发明申请

WO2007128234A1 一种视频码流过滤方法和过滤节点审中-公开
公开(公告)号：WO2007128234A1
公开(公告)日：2007-11-15
申请号：PCT/CN2007/001463
申请日：2007-04-29
申请人：华为技术有限公司 , 罗忠
发明人：罗忠
IPC分类号： H04N7/16
CPC分类号： H04N7/163 , H04N21/44209 , H04N21/4542
摘要： A method and a node for filtering the video stream in the multimedia communication. The method includes obtaining the intra frame form the video stream and decoding the intra frame; identifying the bad content in the decoded intra frame for determining whether stopping the playing of the video stream. The node includes a video stream delay module, a switch module, an I frame detecting/decoding module, content identifying module and a determining module.

8. 发明申请

WO2007095811A1 一种视频伽玛特性参数传送方法和装置审中-公开
公开(公告)号：WO2007095811A1
公开(公告)日：2007-08-30
申请号：PCT/CN2006/003378
申请日：2006-12-12
申请人：华为技术有限公司 , 罗忠
发明人：罗忠
IPC分类号： H04N5/57 , H04N5/44 , H04N7/14
CPC分类号： H04N5/202
摘要： A method for transmitting video gamma characteristic parameters in video communication includes the following steps: selecting input luminance discrete values according to the function of the density distribution of the video luminance discrete probability, such that the ratio of the points of the selected input luminance discrete values selected at any given area to the total points of the input luminance discrete values is substantially proportional to the video luminance distribution probability at the area; and determining a corresponding output luminance discrete value to each selected input luminance discrete value respectively; and writing the selected input luminance discrete values and the output luminance discrete values into the video stream to transmit. A corresponding device for transmitting video gamma characteristic parameters includes a determining module for determining the input luminance discrete values, a determining module for determining the output luminance discrete values, and a transmitting module for transmitting the video stream. By using the method or the device, the high accuracy gamma parameters may be obtained and transmitted between the communication terminals.

9. 发明申请

WO2007045141A1 支持容错弹性的多媒体数据传送方法审中-公开
公开(公告)号：WO2007045141A1
公开(公告)日：2007-04-26
申请号：PCT/CN2006/001846
申请日：2006-07-25
申请人：华为技术有限公司 , 罗忠 , 宋彬
发明人：罗忠 , 宋彬
IPC分类号： H04L12/54 , H04N7/24 , H04L29/06
CPC分类号： H04L1/0009 , H04L1/0017 , H04L65/80
摘要： A method for supporting multimedia data transmission with error resilience is disclosed, thereby the error resilience mechanism of multimedia data real-time transmission can be realized on the transmission protocol layer. In present invention, at first, it provides multimedia data real-time transmission by providing the ERRTP protocol which carrying information about the forward error correction(FEC) coding manner to the exist RTP protocol, so that it can mark the information about the corresponding FEC coding manner for multimedia data at the same time it is transmitted on ERRTP, thereby the error resilience mechanism can be introduced in transmission layer. Next, each standby FEC coding manner can be selected according to present network condition and the level of importance about the multimedia data at transmitting end, so that it can achieve the purpose of protect based on the level, and can realize the equilibrium about the protect ability and the transmission efficiency.

10. 发明申请

WO2007006209A1 伽玛特性协商校正方法及系统和终端审中-公开
公开(公告)号：WO2007006209A1
公开(公告)日：2007-01-18
申请号：PCT/CN2006/001577
申请日：2006-07-05
申请人：华为技术有限公司 , 罗忠
发明人：罗忠
IPC分类号： H04N9/69 , G06F13/00
CPC分类号： H04N5/202 , G06F3/14 , G09G2320/0276 , H04N21/21 , H04N21/23 , H04N21/615
摘要：本发明涉及视频通信技术，特别涉及终端之间交互的通信信号的伽玛特性校正方法以及应用系统和终端，以解决现有技术两方通信中任意多个伽玛特性环节没有通用校正方法的问题。所述方法包括如下步骤：通信双方在通信前或通信建立过程中，根据通信双方的校正能力信息协商决定是否进行校正，若进行校正则选择其中一个作为校正执行端校正双方之间交互信号的伽玛特性的、或者双方分别作为校正执行端各自校正从对端收到的信号，否则不进行校正，其中，通信双方可以直接进行协商或通过一个中央服务器进行协商仲裁。通过中央服务器进行仲裁时，校正系统包括设置在终端上的校正模块和与校正模块通信连接的中央处理器。

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