公开(公告)号：US07020194B2

公开(公告)日：2006-03-28

申请号：US09808627

申请日：2001-03-14

申请人： Dong Gyu Sim ,  Hae Kwang Kim ,  Mun Churl Kim ,  Jin Woong Kim

发明人： Dong Gyu Sim ,  Hae Kwang Kim ,  Mun Churl Kim ,  Jin Woong Kim

IPC分类号： H04B1/66

CPC分类号： G06F17/30247 ,  G06F17/30017 ,  G06K9/6261

摘要： The present invention relates to an apparatus and a method for vector descriptor representation and multimedia data retrieval, which can quantize a plurality of feature values described by a vector descriptor respectively, represent the quantized feature values in the form of bit or orthogonally transform the quantized bector feature values, and rearrange the feature values represented in the form of bit from the highest bit to the lowest bit or rearrange the transformed coefficient from low frequency to high frequency to represent the vector descriptor hierarchically. Moreover, when retrieving multimedia data, the present invention can code in variable length and store the rearranged feature values and the number of feature values which are input, inversely code only the feature values corresponding to the number of the feature values of the stored feature values, inversely arrange the inversely coded feature values to be restored to original feature values, inversely quantize the restored feature values, and compare the feature values restored by the inverse quantization with the feature values stored in a multimedia database to retrieve multimedia data.

摘要翻译： 本发明涉及一种用于向量描述符表示和多媒体数据检索的装置和方法，其可以分别量化由矢量描述符描述的多个特征值，以比特形式的量化特征值或正交变换量化的矩阵 特征值，并将从最高位到最低位的位形式表示的特征值重新排列，或将变换后的系数从低频重新排列到高频，以分层表示向量描述符。 此外，当检索多媒体数据时，本发明可以以可变长度编码并存储重排的特征值和输入的特征值的数量，仅对与存储的特征值的特征值的数量相对应的特征值进行逆代码 将反编码的特征值反向排列成要恢复到原始特征值，逆量化恢复的特征值，并将由逆量化恢复的特征值与存储在多媒体数据库中的特征值进行比较以检索多媒体数据。