公开(公告)号：KR1020080004392A

公开(公告)日：2008-01-09

申请号：KR1020070067031

申请日：2007-07-04

Applicant: 한국전자통신연구원 ,  경희대학교 산학협력단

Inventor： 정세윤 ,  박광훈 ,  박민우 ,  신승표 ,  서덕영 ,  문경애 ,  홍진우

IPC: H04N19/30 ,  H04N19/105 ,  H04N19/51

Abstract: A scalable video encoding/decoding method and an apparatus thereof are provided to override an existing weight given in a slice unit to a corresponding block of an enhancement layer of a reference frame with a greater weight than the existing weight in forming the reference block of the enhancement layer when the video data of a macro block of a basic layer is in a skip mode, thereby improving efficiency of SVC(Scalable Video Coding). A scalable video encoding method comprises the following steps of: determining whether the block of a basic layer corresponding to the block of an enhancement layer of a current frame to encode is in a skip mode(S210); overriding an existing weight set in the block of the enhancement layer of a reference frame corresponding to the block of the enhancement layer of the current frame with a new weight when the block of the basic layer is in the skip mode(S220); and generating a reference block for the block of the enhancement layer of the current frame based on the block of the enhancement layer of the reference frame and the block of the basic layer of the current frame by using the new weight(S230).

Abstract translation: 提供了一种可分级的视频编码/解码方法及其装置，以将在片单元中给出的现有权重覆盖参考帧的增强层的对应块，其中权重大于现有权重，以形成参考块的参考块 当基本层的宏块的视频数据处于跳过模式时，增强层，从而提高SVC（可缩放视频编码）的效率。 可扩展视频编码方法包括以下步骤：确定与要编码的当前帧的增强层的块相对应的基本层的块是否处于跳过模式（S210）; 当基本层的块处于跳过模式时，用当前帧的当前帧的增强层的块对应的参考帧的增强层的块中的现有权重集合（S220）; 并且通过使用新的权重，基于参考帧的增强层的块和当前帧的基本层的块来生成当前帧的增强层的块的参考块（S230）。

公开(公告)号：KR1020080004340A

公开(公告)日：2008-01-09

申请号：KR1020070040969

申请日：2007-04-26

Applicant: 한국전자통신연구원 ,  경희대학교 산학협력단

Inventor： 정세윤 ,  박광훈 ,  박민우 ,  신승표 ,  서덕영 ,  문경애 ,  홍진우

IPC: H04N19/30 ,  H04N19/103

CPC classification number: H04N19/34 ,  H04N19/132 ,  H04N19/157 ,  H04N19/176 ,  H04N19/196 ,  H04N19/61

Abstract: A method for scalable encoding of video data and an apparatus thereof are provided to override an existing weight value given in a slice unit with a greater weight when the reference block of an enhancement layer is generated if the video data of a macro block of a base layer is in a skip mode, thereby improving efficiency of the scalable video encoding. A method for scalable encoding of video data comprises the following steps of: generating a reference block by using a weight set for a corresponding block when the video data of a macro block can be predicted from the video data of reference pictures for the video data of the macro block(220); and generating the reference block by using a weight given to a slice belonging to a current frame when the video data of the macro block can not be predicted from the video data of the reference pictures.

Abstract translation: 提供一种用于视频数据的可分级编码的方法及其装置，用于当生成增强层的参考块时，以更大的权重来覆盖在片单元中给出的现有权重值，如果基址的宏块的视频数据 层处于跳过模式，从而提高可扩展视频编码的效率。 一种用于视频数据的可分级编码的方法包括以下步骤：当可从根据视频数据的视频数据的参考图像的视频数据预测宏块的视频数据时，通过使用对于相应块的权重来生成参考块 宏块（220）; 以及当所述宏块的视频数据不能从所述参考图像的视频数据中预测时，通过使用给予属于当前帧的切片的权重来生成所述参考块。

公开(公告)号：KR1020070040303A

公开(公告)日：2007-04-16

申请号：KR1020060098098

申请日：2006-10-09

Applicant: 한국전자통신연구원 ,  학교법인 경희학원

Inventor： 박광훈 ,  박민우 ,  정세윤 ,  김규헌 ,  홍진우

IPC: H04N19/30 ,  H04N19/177 ,  H04N19/895

CPC classification number: H04N21/2383 ,  H04N19/29 ,  H04N19/33 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/61 ,  H04N19/70 ,  H04N19/89 ,  H04N19/895 ,  H04N21/2402 ,  H04N21/2404 ,  H04N21/2662 ,  H04N21/40

Abstract: 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.