Patent application number | Description | Published |
20090125310 | APPARATUS AND METHOD FOR INSERTING/EXTRACTING CAPTURING RESISTANT AUDIO WATERMARK BASED ON DISCRETE WAVELET TRANSFORM, AUDIO RIGHTS PROTECTION SYSTEM USING THE SAME - An apparatus and method for embedding and extracting a capturing-resistant audio watermark based on discrete wavelet transform, and a copyright management system using the same are provided. The apparatus for embedding a wavelet based audio watermark includes: a framing unit for dividing an input audio signal into small signals with a regular length; a discrete wavelet transform unit for calculating an mean value of wavelet coefficients by transforming the small signals based on a discrete wavelet transform; and an embedding unit for changing the calculated mean value according to a watermark where a synchronization signal is inserted and inserting the watermark into the audio signal. | 05-14-2009 |
20090172404 | Method and Apparatus for Hybrid Watermarking - A hybrid watermark insertion method includes the steps of dividing the digital image into a low frequency region and a high frequency region using an edge map of the digital image; inserting a watermark into the low frequency region of the image by employing a watermarking method using a human visual system (HVS); and inserting the watermark into the high frequency region of the image by employing a quantization index modulation (QIM) method. A hybrid watermark extraction method includes the steps of estimating a reference value used when inserting a watermark, and searching a maximum value of correlation coefficients in an image of the watermark image while changing the estimated reference value within a designated range, to thereby find out the watermark insertion method. Accordingly, the watermark insertion method can be easily identified, thereby enabling the watermark extraction in a more readily manner. | 07-02-2009 |
20090238465 | APPARATUS AND METHOD FOR EXTRACTING FEATURES OF VIDEO, AND SYSTEM AND METHOD FOR IDENTIFYING VIDEOS USING SAME - An apparatus for extracting features from a video includes a frame rate converter for performing a frame rate conversion on the video to a preset frame rate, a gray scale converter for performing a grey scale conversion on the frame rate-converted video, a frame size normalizer for performing a frame size normalization on the gray scale-converted video to a preset image size, and a feature extractor for partitioning the normalized video into image blocks of a predetermined size, and extracting features from the image blocks on the basis of luminance values of the image blocks. A video identification system employs the feature extracting apparatus to identify an original video and an object video. | 09-24-2009 |
20100063978 | APPARATUS AND METHOD FOR INSERTING/EXTRACTING NONBLIND WATERMARK USING FEATURES OF DIGITAL MEDIA DATA - An apparatus and method for inserting/extracting a nonblind watermark using features of digital media data are provided. The apparatus and method inserts a watermark adaptively using watermark-related information determined by analyzing the characteristics of digital media data, also extracts features of the digital media data, automatically searches original media data corresponding to the features, and simultaneously and efficiently extracts a watermark using watermark-related information. Therefore, When the watermark is extracted, the original media data can be searched automatically. | 03-11-2010 |
20100149424 | SYSTEM AND METHOD FOR DETECTING SCENE CHANGE - The present invention relates to a system for scene change detection including a decoder decoding input digital video data into video data compressed by a single codec or uncompressed video data in a codec-independent format, a normalizer normalizing the video data decoded by the decoder in a temporally and spatially uniform format, and a scene change detector computing a mode ratio for each frame of the normalized video data through a mode determination, and determining, when a frame has a mode ratio higher than a preset threshold value, that a scene change has occurred at the frame. The decoder decodes video data compression-coded by various video codecs into uncompressed video frames. | 06-17-2010 |
20100150233 | FAST MODE DECISION APPARATUS AND METHOD - A fast mode decision apparatus includes a data storage for storing therein data on a reference picture, a per-mode calculator for computing values on a macroblock to be encoded and a mode decision unit for determining an optimal encoding mode for the macroblock to be encoded based on the values computed by the per-mode calculator and data on the reference picture stored in the data storage. The apparatus further includes a mode deactivator for deactivating P8×8 mode I4×4 mode, wherein the mode decision unit selects, as the optimal encoding mode, one among modes other than the modes deactivated by the mode deactivator. | 06-17-2010 |
20100182401 | SYSTEM AND METHOD FOR MANAGING DIGITAL VIDEOS USING VIDEO FEATURES - A method for managing digital videos includes extracting a feature of an input digital video, searching for candidate features having similarity to the extracted feature, and comparing the extracted feature with each of the candidate features to select at least one of the candidate features similar to the extracted feature and provide information on a digital video corresponding to the selected candidate feature. | 07-22-2010 |
20100268715 | INDEX DATABASE CREATING APPARATUS AND INDEX DATABASE RETRIEVING APPARATUS - An index database creating apparatus includes a feature extracting unit for extracting features from a content; an index creating unit for creating feature indices of the extracted features; an index selector for selecting one or more of the feature indices based on frequency-based importance levels thereof; and a feature index database for storing therein the selected feature indices along with locations thereof in the content. The index selector obtains the frequency-based importance levels based on frequency distributions of the feature indices in the content and in other contents to be stored in the feature index database. | 10-21-2010 |
20110261997 | FORENSIC MARK INSERTION APPARATUS AND METHOD - A forensic mark insertion apparatus includes: an original content segment storage unit for storing multiple original contents; and a service control unit for, in response to a request for a content from a user, retrieving an original content corresponding to the request for the content from the original content segment storage unit, separating the retrieved original content into plurality of content segments, selectively inserting a forensic mark into some of the content segments, and assembling the content segments to produce an forensic-mark inserted content to be provided to the user. | 10-27-2011 |
20120124473 | SYSTEM AND METHOD FOR PLAYING MUSIC USING MUSIC VISUALIZATION TECHNIQUE - A music playing system using a music visualization technique includes: a music information extraction unit for extracting one or more pieces of music information regarding basic characteristics, meta-characteristics and emotional characteristics of music, the music including music being played at present, music selected for playing, and music selected for visualization; and a display control unit that provides a user interface window for visualizing the extracted music information and controls the user interface window, wherein the user interface window includes a visualization configuration panel having a setup function for selecting the music information to be extracted. | 05-17-2012 |
20130104242 | METHOD AND SYSTEM FOR FORENSIC MARKING OF DIGITAL CONTENTS - Disclosed are a forensic marking method and a forensic marking system capable of inserting in real-time a forensic mark for user information in digital contents provided online. The forensic marking method of the digital content according to an exemplary embodiment of the present disclosure includes generating a first content created by inserting a first forensic mark in an original content and a second content created by inserting a second forensic mark in the original content by a content server; transmitting the first and second contents to a client terminal by the content server; and combining fragments of the first and second contents in a combination order corresponding to user information to generate a third content by the client terminal | 04-25-2013 |
20130301869 | FORENSIC MARKING APPARATUS AND METHOD FOR REAL-TIME CONTENT SERVICE - A forensic marking apparatus includes a preprocessing unit configured to selectively perform preprocessing for forensic processing on content to be provided to a user terminal; and a forensic processing unit configured to perform forensic marking on the content by combining content files preprocessed by the preprocessing unit or perform the forensic marking on an uncompressed original content file in real time, in accordance with a forensic processing method set for the content. Further, the forensic marking apparatus includes a control unit configured to determine the forensic processing method for the content, to control the forensic processing unit so that forensic processing is performed on the content in accordance with the determined method, and to provide the forensic-processed content to the user terminal. | 11-14-2013 |