Hyundai Electronics Industries Co. Ltd.

Hyundai Curitel, Inc.

Jong Deuk Kim

Joo Hee Moon

Cheol Soo Park

Jae Won Chung

Nam Kyu Kim

Hae Kwang Kim

A method and apparatus for retrieving multimedia data using shape information. The multimedia data retrieval apparatus comprises a shape information feature extractor for receiving shape information of a query image and extracting a feature of the received shape information using a shape information descriptor based on eigen vectors of a multilayer covariance matrix, an image feature extractor for extracting a feature of each image data in the same manner as the shape information feature extractor, a multimedia database creator for creating a multimedia database on the basis of the features extracted by the image feature extractor, a similarity comparator for comparing the feature of the query image extracted by the shape information feature extractor with the features of the image data in the multimedia database to calculate similarities therebetween, and a compared result output unit for outputting the results calculated by the similarity comparator. Multimedia data can accurately and rapidly be retrieved by defining and using a shape information descriptor with a consistency against rotation, scaling and translation of the shape information.

Method and apparatus for retrieving multimedia data using shape information

A method for coding a digital interlaced moving video. Picture-unit overhead information is first transmitted and it is then determined whether a video packet to be coded is a first packet of a given picture. A video packet header including overhead information for an interlaced decoding operation is transmitted if the video packet is not the first packet of the given picture. If the video packet is the first packet of the given picture or after the video packet header is transmitted, it is determined whether the given picture is an intra picture. If the given picture is the intra picture, the video packet is coded and transmitted in an interlaced intra picture manner. The video packet is coded and transmitted in an interlaced inter picture manner if the given picture is not the intra picture. If the video packet is not a last packet of the given picture, a digital interlaced coding operation is repeatedly performed. The digital interlaced coding operation is ended if the video packet is the last packet of the given picture. Even when the coded, interlaced moving video is transmitted through a channel where a transmission error may often occur, such as a mobile communication channel, a decoder can perform an error concealment operation of high performance to reconstruct a moving picture of high quality.

Method for coding digital interlaced moving video

A method and apparatus for generating a bounding rectangle of a VOP for interlaced scan type video signals, which are capable of accurately generating a bounding rectangle, thereby preventing a color bleeding from occurring in the field-based chrominance shape subsampling. The method includes bounding rectangle formation step of forming a bounding rectangle of a video object plane in such a fashion that the bounding rectangle contains an object therein, based on input luminance shape information, optimum setting determination step of determining whether or not a spatial reference point of the bounding rectangle is positioned on an x-y coordinate of coordinate value (2m, 4n) (m and n&equals;0, 1, 2, 3, 4, . . . ), and bounding rectangle adjustment step of varying the bounding rectangle, when it is determined at the optimum setting determination step that the spatial reference point of the bounding rectangle is not positioned on the x-y coordinate of coordinate value (2m, 4n), in such a fashion that the spatial reference point of the bounding rectangle is positioned on an x-y coordinate of coordinate value (2m, 4n).

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Seoul, South Korea

Jong Deuk Kim