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    • 5. 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码器
    • WO2007043793A1
    • 2007-04-19
    • PCT/KR2006/004073
    • 2006-10-10
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEKYUNGHEE UNIVERSITYPARK, Gwang-HoonPARK, Min-WooJEONG, Se-YoonKIM, Kyu-HeonHONG, Jin-Woo
    • PARK, Gwang-HoonPARK, Min-WooJEONG, Se-YoonKIM, Kyu-HeonHONG, Jin-Woo
    • H04N7/24
    • 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相对于上层的编号编号的当前关键图像的解码 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中通过编码密钥图像进行编码,通过连续执行闭环编码来检测在解码期间的关键图像的丢失,可以有效地对由于关键图像的丢失引起的错误采取行动 预测关键图片。 此外,当在上层的关键图像丢失的情况下,通过使用下基层的对应图片的解码图像的数据,通过隐藏由不正确参考引起的错误来降低图像质量的劣化, 通过具有多层结构的视频流来保证下基层的传输。
    • 6. 发明申请
    • INTERFRAME WAVELET CODING APPARATUS AND METHOD CAPABLE OF ADJUSTING COMPUTATIONAL COMPLEXITY
    • 帧间小波编码装置和能够调整计算复杂性的方法
    • WO2005051000A1
    • 2005-06-02
    • PCT/KR2004/001130
    • 2004-05-13
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEJEONG, Se-YoonKIM, Kyu-HeonKIM, WonhaKIM, Jin-Woong
    • JEONG, Se-YoonKIM, Kyu-HeonKIM, WonhaKIM, Jin-Woong
    • H04N7/24
    • H04N19/615H04N19/122H04N19/13H04N19/139H04N19/172H04N19/1883H04N19/61H04N19/63H04N19/635
    • Provided is an inter-frame wavelet coding apparatus that can reduce the computation complexity of a decoder by adjusting a decomposition level and a filter length based on the information amount of a frame during wavelet transform and a method therefor. The inter-frame wavelet coding apparatus includes: a Motion Compensated Temporal Filtering (MCTF) unit for computing a motion vectors of a group of pictures (GOP) and filtering the GOP with respect to the temporal axis, to thereby obtain filtered frame; a wavelet transforming unit for performing spatial wavelet transform on the filtered frame and outputting a wavelet coefficient; a quantization unit for quantizing the wavelet coefficient; an entropy coding unit for entropy-coding the motion vector computed in the MCTF unit and the quantized wavelet coefficient, to thereby generate an entropy-coded bit stream; and a wavelet filter managing unit for selecting a decomposition level and a filter length for the wavelet transforming unit based on motion estimation information of the GOP video computed in the MCTF unit, wherein the decomposition level and the filter length are included in the entropy-coded bit stream.
    • 提供一种帧间小波编码装置,其能够通过在小波变换期间基于帧的信息量调整分解级别和滤波器长度来减少解码器的计算复杂度及其方法 。 该帧间小波编码装置包括:运动补偿时间滤波(MCTF)单元,用于计算图像组(GOP)的运动矢量并相对于时间轴对GOP进行滤波,从而获得滤波后的帧; 小波变换单元,用于对经滤波的帧执行空间小波变换并输出小波系数; 量化单元,用于量化小波系数; 熵编码单元,用于对在MCTF单元中计算的运动矢量和量化的小波系数进行熵编码,从而生成熵编码的比特流; 以及小波滤波器管理单元,用于基于在MCTF单元中计算的GOP视频的运动估计信息来选择用于小波变换单元的分解级别和滤波器长度,其中分解级别和滤波器长度被包括在熵编码 比特流。
    • 10. 发明申请
    • TERMINAL FOR DECODING DMB CONTENTS AT HIGH SPEED AND METHOD THEREOF
    • 用于高速解码DMB内容的终端及其方法
    • WO2006062360A1
    • 2006-06-15
    • PCT/KR2005/004195
    • 2005-12-08
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTENET & TV INC.CHEONG, Won-SikKIM, Kyu-HeonLIM, Young-Kwon
    • CHEONG, Won-SikKIM, Kyu-HeonLIM, Young-Kwon
    • H04N7/00
    • H04H60/27H04H60/90H04H60/93H04N21/235H04N21/434H04N21/4341H04N21/435H04N21/4384H04N21/44012H04N21/6112
    • Provided is a digital multimedia broadcasting (DMB) receiving terminal for decoding broadcasting contents at a high speed, the terminal including: a tuner for selecting broadcasting signals of a predetermined channel based on a user request from a wireless broadcasting signal inputted from the outside; a tuner and channel decoder for acquiring ensembles by performing channel decoding on the broadcasting signals of the channel; a storage for storing decoding information required for decoding broadcasting contents of the channel selected by a user; an ensemble and transport stream demultiplexer for acquiring transport streams from the ensembles by using the decoding information stored in the storage, extracting Program Map Table (PMT) and elementary stream (ES) from the transport streams by using the decoding information, and extracting Initial Object Descriptor (IOD) included in the PMT; a decoder for decoding the ES and the IOD; and a scene compositor for forming a broadcasting contents scene by using the information decoded in the decoder.
    • 提供了一种用于高速解码广播内容的数字多媒体广播(DMB)接收终端,该终端包括:根据从外部输入的无线广播信号,根据用户请求选择预定频道的广播信号的调谐器; 调谐器和信道解码器,用于通过对信道的广播信号执行信道解码来获取集合; 用于存储用于解码由用户选择的频道的广播内容所需的解码信息的存储器; 用于通过使用存储在存储器中的解码信息从集合获取传输流的集成和传输流解复用器,通过使用解码信息从传输流中提取节目映射表(PMT)和基本流(ES),并且提取初始对象 描述符(IOD)包含在PMT中; 用于对ES和IOD进行解码的解码器; 以及用于通过使用在解码器中解码的信息形成广播内容场景的场景合成器。