会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 87. 发明申请
    • METHOD FOR ENCODING/DECODING VIDEO SEQUENCE BASED ON MCTF USING ADAPTIVELY-ADJUSTED GOP STRUCTURE
    • 使用ADAPP调整GOP结构编码/解码基于MCTF的视频序列的方法
    • US20090080519A1
    • 2009-03-26
    • US11576572
    • 2005-10-18
    • Se Yoon JeongKyu Heon KimJin Woo HongGwang Hoon ParkMin Woo Park
    • Se Yoon JeongKyu Heon KimJin Woo HongGwang Hoon ParkMin Woo Park
    • H04N5/917
    • H04N19/615H04N19/114H04N19/13H04N19/147H04N19/172H04N19/61H04N19/63H04N19/70
    • Provided is a method for performing motion compensated temporal filtering (MCTF)-based coding on a video sequence using the structure of adaptively divided group of pictures (GOP). The method includes the steps of, for each predefined 2N frame-sized group of pictures (GOP) of the video sequence, (a) encoding the 2N frame-sized GOP of the video sequence based on each of the different GOP sizes from the maximum size, 2N, to the minimum size, 2N (M is an integer between 1 and N) and obtaining different values between frames reconstructed after the encoding is performed and frames after the MCTF is performed, based on each of the different GOP sizes; (b) selecting at least one sub-GOP based on the difference values obtained by encoding the 2N frame-sized GOP of the video sequence based on each of the different GOP sizes; and (c) generating a bitstream by encoding the 2N-frame-sized GOP based on the at least one selected sub-GOP. Thereby, the MCTF-based video coding is performed by adaptively dividing the GOP size based on performance and thereby obtains high coding efficiency.
    • 提供了一种使用自适应划分的图像组(GOP)的结构对视频序列执行基于运动补偿时间滤波(MCTF)的编码的方法。 该方法包括以下步骤:针对视频序列的每个预定义的2N帧大小的图像组(GOP),(a)基于每个不同GOP大小从最大值编码视频序列的2N个帧大小的GOP 基于每个不同的GOP大小,2N(M是1和N之间的整数)并且在执行编码之后重构的帧和执行MCTF之后的帧获得不同的值; (b)基于通过基于每个不同GOP大小对视频序列的2N个帧大小的GOP进行编码而获得的差值来选择至少一个子GOP; 以及(c)基于所述至少一个选择的子GOP来对所述2N帧大小的GOP进行编码来生成比特流。 因此,通过基于性能自适应地划分GOP大小来执行基于MCTF的视频编码,从而获得高的编码效率。
    • 88. 发明申请
    • Method of Scalable Video Coding and the Codec Using the Same
    • 可扩展视频编码方法和使用它的编解码器
    • US20080232470A1
    • 2008-09-25
    • US12089419
    • 2006-10-10
    • Gwang Hoon ParkMin Woo ParkSe Yoon JeongKyu Heon KimJin Woo Hong
    • Gwang Hoon ParkMin Woo ParkSe Yoon JeongKyu Heon KimJin Woo Hong
    • H04B1/66H04N7/12
    • H04N21/2383H04N19/29H04N19/33H04N19/44H04N19/46H04N19/503H04N19/61H04N19/70H04N19/89H04N19/895H04N21/2402H04N21/2404H04N21/2662H04N21/40
    • Since joint scalable video coding (JSVC) adopts a scheme in which numbers are assigned to all of the pictures according to the order in which the pictures are displayed, it is difficult to detect a drop (or loss) of a key picture and thus it is difficult to effectively take action against an error caused by the loss of the key picture. The present invention provides a coding method of detecting a loss of a key picture by numbering key pictures in JSVC in which predictive (P) pictures have a closed-loop structure and of effectively taking action against an error in the case of a loss of a key picture, and a codec using the coding method. The SVC method includes performing encoding while assigning a number to a key picture of an upper layer and performing decoding with respect to the number-encoded current key picture of the upper layer using data of a decoded image of a picture of a lower layer that is temporally matched with the current key picture of the upper layer when a loss of a key picture between the number-encoded current key picture of the upper layer and a previous key picture that is number-encoded prior to the current key picture is detected. Therefore, it is possible to effectively take action against to an error caused by a loss of a key picture by detecting the loss of a key picture during decoding by encoding using numbering of key pictures in JSVC in which closed-loop coding is performed by consecutively predicting key pictures. Moreover, it is possible to minimize degradation in image quality by concealing an error caused by an incorrect reference by using data of a decoded image of a corresponding picture of a lower base layer when a key picture of an upper layer is lost in an environment where transmission of the lower base layer is guaranteed with a video stream having a multi-layered structure.
    • 由于联合可缩放视频编码(JSVC)采用根据图像显示顺序将数字分配给所有图像的方案,因此难以检测到关键图像的下降(或丢失),因此它 难以有效地采取行动打击由于失去关键图片而造成的错误。 本发明提供了一种通过对JSVC中的关键画面进行编号来检测关键画面的损失的编码方法,其中预测(P)画面具有闭环结构,并且在丢失了 关键图片和使用编码方法的编解码器。 SVC方法包括在向上层的关键图像分配数字的同时执行编码,并且使用下层的图像的解码图像的数据来执行关于上层的编号编号的当前密钥图像的解码 当检测到在上一层的编号编码的当前关键图像与在当前关键图像之前被编码的先前的关键图像之间的关键图像的丢失时,与上层的当前关键图像暂时匹配。 因此,通过在JSVC中通过使用编码密钥图像进行编码的解码期间通过检测密钥图像的丢失而有效地采取对由于密钥图像丢失引起的错误的动作,其中连续执行闭环编码 预测关键图片。 此外,当在上层的关键图像丢失时,通过使用下基层的对应图片的解码图像的数据,在由于不正确的参考引起的错误隐藏的情况下,可以最小化图像质量的劣化, 通过具有多层结构的视频流来保证下基层的传输。
    • 89. 发明授权
    • Method and apparatus for estimating camera motion
    • 用于估计摄像机运动的方法和装置
    • US06710844B2
    • 2004-03-23
    • US10029794
    • 2001-12-31
    • Kyu Seo HanByung Tae ChunJae Yeon LeeJung SohHo Sub YoonSe Yoon JeongYoung Lae Bae
    • Kyu Seo HanByung Tae ChunJae Yeon LeeJung SohHo Sub YoonSe Yoon JeongYoung Lae Bae
    • G03B1918
    • H04N5/145
    • A method and an apparatus for estimating a camera motion include a frame picture memory unit for storing a plurality of moving picture frames, a buffer for sequentially extracting the frames and storing them, a block division unit for dividing each of the frames stored in the buffer into a plurality of blocks, a mean picture generation unit for generating horizontal and vertical mean pictures using the blocks, a horizontal and a vertical mean picture memory unit for storing the data of the horizontal and vertical mean pictures, a motion vector extraction unit for extracting motion vectors from the blocks using horizontal and vertical mean picture data, a motion vector memory unit for storing the data of the motion vectors, and a camera motion estimation unit for estimating a camera motion using the motion vector data.
    • 用于估计摄像机运动的方法和装置包括:用于存储多个运动图像帧的帧图像存储单元,用于顺序提取帧并存储它们的缓冲器;块分割单元,用于分割存储在缓冲器中的每个帧 用于使用该块生成水平和垂直平均图像的平均图像生成单元,用于存储水平和垂直平均图像的数据的水平和垂直平均图像存储单元,用于提取的运动矢量提取单元 使用水平和垂直平均图像数据的块的运动矢量,用于存储运动矢量的数据的运动矢量存储单元和用于使用运动矢量数据估计相机运动的相机运动估计单元。