Patent application number | Description | Published |
20090073973 | Router having black box function and network system including the same - A router having a black box function capable of storing a data block of a specific node or node group in a network, and a network system including the router are provided. The router includes: a black box memory storing node data; at least one packet preprocessor selecting and processing a data packet required to be stored in a black box from node data transferred via a wired/wireless transmission medium; a data storage storing the node data transferred through the packet preprocessor in the black box memory; a data reader reading corresponding node data in response to a node data transfer request from an external device; and a data transmitter processing the node data read by the data reader in the form of a packet and transferring the packet to the external device. | 03-19-2009 |
20120143939 | MOBILE NODE AND METHOD FOR MAINTAINING SESSION USING LOGICAL INTERFACE - A mobile node and method suitable to allocate a single Internet protocol (IP) address to a physically independent interface and to provide a logical interface that connects between an application layer and the physical interface are provided. The mobile node includes an upper layer processing unit configured to perform a packet service; a physical interface unit configured to comprise multiple physical interfaces for access to multiple wireless networks; and a logical interface unit configured to allocate a single home IP address to the multiple physical interfaces and enable the upper layer processing unit to process a packet using the single home IP address, and to process packets belonging to the same session to be transmitted and received through the same physical interface from among the multiple physical interfaces. | 06-07-2012 |
20120151583 | DDOS ATTACK DETECTION AND DEFENSE APPARATUS AND METHOD - A Distributed Denial of Service (DDoS) attack detection and defense apparatus and method are provided. The Distributed Denial of Service (DDoS) attack detection and defense apparatus includes: a flow information collection unit to collect, from one or more input packets with an IP address of an attack target system as a destination IP address, flow information including source IP addresses of the input packets and packet counts of one or more flows that are classified for each of the source IP addresses and each of different protocol types; an inspection unit to calculate packets per second (PPS) values of the flows based on the packet counts; and a response unit to determine a DDoS attack response method for each of the flows based on the PPS value and the protocol type of a corresponding flow and to process the corresponding flow using the determined DDoS attack response method | 06-14-2012 |
20120151593 | DISTRIBUTED DENIAL OF SERVICE ATTACK DETECTION APPARATUS AND METHOD, AND DISTRIBUTED DENIAL OF SERVICE ATTACK DETECTION AND PREVENTION APPARATUS FOR REDUCING FALSE-POSITIVE - Provided is a DDoS attack detection apparatus including an information collecting unit to collect DDoS detection information including rate information about traffic change, variation of a first type flow and a Packet Per Second (PPS) for a second type flow, in which the rate information about traffic change is obtained using packet count of packets input per a unit time, flow count of flows input per the unit time and the byte count of bytes input per the unit time; and a testing unit to calculate a probability of occurrence of the DDoS attack by use of a first probability determined by the rate information about traffic change, a second probability determined by the variation of the first type flow and a third probability determined by the PPS for the second type flow and detect occurrence of the DDoS attack based on the probability of occurrence of the DDoS attack. | 06-14-2012 |
Patent application number | Description | Published |
20130039421 | METHOD AND APPARATUS FOR PERFORMING INTRA-PREDICTION USING ADAPTIVE FILTER - Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction comprises the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter. | 02-14-2013 |
20130215968 | VIDEO INFORMATION ENCODING METHOD AND DECODING METHOD - The present invention relates to a method and apparatus for encoding and decoding video information. The video information encoding method according to the present invention comprises: a step of performing a prediction on a current block; and a step of entropy-encoding the predicted information and transmitting the encoded information. The step of performing a prediction comprises: a step of acquiring motion information on a neighboring block from the neighboring block of the current block; and a step of determining motion information on the current block on the basis of the acquired motion information. The transmitting step also involves transmitting information required for the prediction of the current block. According to the present invention, the complexity of video compression and the quantity of transmitted information may be reduced. | 08-22-2013 |
20130243087 | INTRA PREDICTION MODE ENCODING/DECODING METHOD AND APPARATUS FOR SAME - An intra prediction method according to the present invention comprises the following steps: deriving neighboring prediction mode information from a left neighboring prediction mode and a top neighboring prediction mode; deriving an intra prediction mode for a target unit to be decoded, using the derived neighboring prediction mode information; and performing intra prediction for the target unit to be decoded, based on the intra prediction mode. According to the present invention, video encoding/decoding efficiency may be improved. | 09-19-2013 |
20130243088 | METHOD AND APPARATUS FOR INTER PREDICTION - An inter prediction method according to the present invention comprises: a step for deriving reference motion information related to a unit to be decoded in a current picture; and a step for performing motion compensation for the unit to be decoded, using the reference motion information that has been derived. According to the present invention, image encoding/decoding efficiency can be enhanced. | 09-19-2013 |
20130251036 | INTRA PREDICTION METHOD AND APPARATUS - An intra prediction method according to the present invention comprises the following steps: performing a directional prediction using at least one of a neighboring pixel of a current block and a left upper corner pixel positioned at a left upper corner of the current block so as to obtain a first prediction value for the current block; obtaining a second prediction value for the current block using the reference sample positioned in the current block; and weighted summing the first prediction value and the second prediction value using a weighting matrix so as to obtain a final prediction value for the current block. According to the present invention, image encoding/decoding efficiency may be improved. | 09-26-2013 |
20130251044 | METHOD AND DEVICE FOR DETERMINING REFERENCE UNIT - An inter prediction method according to the present invention comprises the steps of: selecting candidate units from among reconstructed neighbor units; creating a candidate unit set with respect to units to be decoded, using the selected candidate units; determining a reference unit from among the candidate units which constitute the created candidate unit set; and performing inter prediction on the units to be decoded, using the determined reference unit. According to the present invention, image encoding/decoding efficiency can be improved. | 09-26-2013 |
20130287104 | METHOD FOR ENCODING VIDEO INFORMATION AND METHOD FOR DECODING VIDEO INFORMATION, AND APPARATUS USING SAME - Disclosed herein is a method for coding image information, including: generating prediction information by predicting information on a current coding unit; and determining whether the information on the current coding unit is the same as the prediction information, wherein when the information on the current coding unit is the same as the prediction information, a flag indicating that the information on the current coding unit is the same as the prediction information is coded and transmitted, and when the information on the current coding unit is not the same as the prediction information, the flag indicating that the information on the current coding unit is not the same as the prediction information and the information on the current coding unit are coded and transmitted. | 10-31-2013 |
20130301944 | ENTROPY CODING METHOD USING AN INDEX MAPPING TABLE, AND IMAGE-ENCODING/DECODING APPARATUS AND METHOD USING SAID ENTROPY CODING METHOD - Disclosed is an entropy coding method using an index mapping table, and an apparatus using the method. An imagedecoding method comprises: a step of mapping an inputted codeword to a code number with reference to an inverse codeword mapping table, and calculating the mapped code number in a table index; and a step of updating the inverse mapping table based on the accumulated number of occurrences of the code number, the number of sequential occurrences of the code number, neighbor block encoding/decoding information, and/or threshold value information for updating the inverse index mapping table. According to the present invention, an index mapping table is realigned based on a certain condition, thereby improving encoding/decoding efficiency. | 11-14-2013 |
20140037004 | METHOD FOR ENCODING VIDEO INFORMATION AND METHOD FOR DECODING VIDEO INFORMATION, AND APPARATUS USING SAME - A method for coding image information includes generating prediction information by predicting information on a current coding unit, and determining whether the information on the current coding unit is the same as the prediction information. When the information on the current coding unit is the same as the prediction information, a flag indicating that the information on the current coding unit is the same as the prediction information is coded and transmitted. When the information on the current coding unit is not the same as the prediction information, a flag indicating that the information on the current coding unit is not the same as the prediction information and the information on the current coding unit are coded and transmitted. At the generating of the prediction information, the prediction information is generated by using the information on the coding unit neighboring to the current coding unit. | 02-06-2014 |
20160044336 | METHOD AND APPARATUS FOR PERFORMING INTRA-PREDICTION USING ADAPTIVE FILTER - Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction comprises the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter. | 02-11-2016 |
20160044337 | METHOD AND APPARATUS FOR PERFORMING INTRA-PREDICTION USING ADAPTIVE FILTER - Provided is a method and apparatus for performing intra-prediction using an adaptive filter. The method for performing intra-prediction comprises the steps of: determining whether or not to apply a first filter for a reference pixel value on the basis of information of a neighboring block of a current block; applying the first filter for the reference pixel value when it is determined to apply the first filter; performing intra-prediction on the current block on the basis of the reference pixel value; determining whether or not to apply a second filter for a prediction value according to each prediction mode of the current block, which is predicted by the intra-prediction performance on the basis of the information of the neighboring block; and applying the second filter for the prediction value according to each prediction mode of the current block when it is determined to apply the second filter. | 02-11-2016 |
Patent application number | Description | Published |
20100150163 | ETHERNET SWITCHING APPARATUS, AND METHOD FOR REDUCING POWER CONSUMPTION OF THE SAME - A method for reducing power consumption in an Ethernet switch is provided. The method includes: checking a state of packet data input through each of connection ports; detecting a connection port which has a packet rate lower than a predetermined reference value based on a result of the checking; and generating a data transfer control frame with respect to the connection port having the low packet rate and transmitting the generated data transfer control frame to an Ethernet apparatus connected to the corresponding connection port. Accordingly, a transmission line between the Ethernet switch and an Ethernet apparatus having the low to transmission rate is maintained in a low-power state, thereby reducing energy consumption in both Ethernet apparatuses. | 06-17-2010 |
20100162033 | ETHERNET APPARATUS CAPABLE OF LANE FAULT RECOVERY AND METHODS FOR TRANSMITTING AND RECEIVING DATA - An Ethernet apparatus for performing lane fault recovery is provided. An Ethernet apparatus capable of lane fault recovery includes a data transmitter using a backup lane in the transport link to transmit data intended to be transmitted via the faulty lane when at least one faulty lane is detected from the data transfer lanes, and a data receiver recognizing the data received via the backup lane as data transferred via the faulty lane when the faulty lane is detected. In an Ethernet apparatus having a multi-lane structure, a lane fault and faulty lanes can be accurately recognized while maintaining compatibility with a standard Ethernet apparatus. | 06-24-2010 |
20100329112 | ETHERNET DEVICE AND LANE OPERATING METHOD - An Ethernet device having multiple lanes and a method of operating the lanes are provided. In one general aspect, it is possible to allocate a dummy block to each of one or more lanes such that the lanes do not selectively participate in communications. In addition, on a receiving side, the dummy block can be removed from among the genuine data blocks to enable data to be decoded. In this case, an Ethernet device on a transmission side and an Ethernet device on a receiving side can exchange information of a lane to which the dummy block is allocated by use of a lane status message, and the lane status message may be based on a link fault message specified by Ethernet standards. | 12-30-2010 |
20120155486 | ETHERNET APPARATUS AND METHOD FOR SELECTIVELY OPERATING MULTIPLE LANES - A high-speed Ethernet apparatus having a multiple lane configuration and method for selectively operating the multiple lanes to allow lanes to participate or not in data transmission and reception. The Ethernet apparatus includes: a transfer rate control unit to set a state of each of multiple physical coding sub-layer (PCS) lanes inside to be the same as a state of corresponding each of multiple physical transmission lanes based on state change information that indicates whether the each physical transmission lane is activated or not, and to remove idle blocks from data blocks which are received at a transfer rate of a physical transmission lane in active state among the multiple physical transmission lanes; and a block allocating unit to allocate the data blocks from which the idle blocks have been removed through PCS lanes in active state that correspond to the physical transmission lanes in active state. | 06-21-2012 |
Patent application number | Description | Published |
20130250051 | SIGNALING METHOD FOR A STEREOSCOPIC VIDEO SERVICE AND APPARATUS USING THE METHOD - Disclosed are a signaling method for a stereoscopic video service and an apparatus using the method. An image decoding method comprises: a step of determining a field value based on a broadcast service type and a display mode in decoding a program level descriptor; and a step of determining an encoded stream type, whether an elementary stream is a reference stream, whether the elementary stream is a left-eye image or a right-eye image, additional image upsampling information and information on a subsampled line. Thus, efficiency of encoding/decoding an additional image for a stereoscopic video content may increase. | 09-26-2013 |
20130250975 | METHOD AND DEVICE FOR PACKETIZING A VIDEO STREAM - A digital broadcasting system provides a method and device for packetizing a video stream. The packetizing device includes: a video frame check block for classifying an encoded video stream according to the frame type; a header setting block for setting a packet header for each of the classified frames; and a packetizing block for packetizing a video frame on the basis of the set packet header. The frame type may be one of an intra-coded (I) frame, a predicted (P) frame, and a bi-predictive (B) frame. Since a digital broadcasting stream is efficiently packetized, overhead due to a typical synchronization packet may be reduced, and accordingly, bandwidth may be efficiently used. | 09-26-2013 |
20140143808 | METHOD AND APPARATUS FOR PROVIDING MULTICASTING SERVICE FOR SPECIFIC GROUP - The present invention discloses a multicasting broadcasting apparatus and method. In an aspect, a multicasting broadcasting method includes receiving content from a user, inspecting the content, performing IP encapsulation on the content, reconfiguring a broadcasting frame so that the content does not interfere with other broadcasting signals, generating a modulation signal comprising the content, and broadcasting the modulation signal to target receivers over a broadcasting network. | 05-22-2014 |