Electronics and Telecommunications Research Institute

Emersys Co., Ltd

Myung-Cheol Lee

Hyun-Hwa Choi

Mi-Young Lee

Dong-Woo Lee

In-Ho Lee

Myung-Joon Kim

Byoung-Seob Kim

Chang-Soo Kim

Hun-Soon Lee

Poong-Min Kim

Hyun-Suk Kim

Jin-Wook Kim

Yong-Suk Choi

Jeong-Mo Koo

Dong-Sun Shin

Jong-Woo Kim

Disclosed herein is a method for storing blockchain transaction data. The method includes selecting at least one block file storing blockchain transactions as an encoding block file target, generating encoded chunks including parity chunks using the encoding block file target, and making at least one of the encoded chunks correspond to at least one of blockchain nodes to store at least one of the encoded chunks.

Method and apparatus for storing blockchain transaction data and distributed storage system using the same

Disclosed herein are a method and an apparatus for storing blockchain data based on error correction code. The method for storing blockchain data based on error correction code includes dividing block data to be stored into multiple subblock datasets, generating parity datasets corresponding to the block data, and storing the subblock datasets and the parity datasets in proportion to storage capacities of the blockchain data storage nodes.

Method and apparatus for storing blockchain data based on error correction code

An apparatus and method for managing stream processing tasks are disclosed. The apparatus includes a task management unit and a task execution unit. The task management unit controls and manages the execution of assigned tasks. The task execution unit executes the tasks in response to a request from the task management unit, collects a memory load state and task execution frequency characteristics based on the execution of the tasks, detects low-frequency tasks based on the execution frequency characteristics if it is determined that a shortage of memory has occurred based on the memory load state, assigns rearrangement priorities to the low-frequency tasks, and rearranges the tasks based on the assigned rearrangement priorities.

Apparatus and method for managing stream processing tasks

Disclosed herein are an apparatus and method for managing a data stream distributed parallel processing service. The apparatus includes a service management unit, a Quality of Service (QoS) monitoring unit, and a scheduling unit. The service management unit registers a plurality of tasks constituting the data stream distributed parallel processing service. The QoS monitoring unit gathers information about the load of the plurality of tasks and information about the load of a plurality of nodes constituting a cluster which provides the data stream distributed parallel processing service. The scheduling unit arranges the plurality of tasks by distributing the plurality of tasks among the plurality of nodes based on the information about the load of the plurality of tasks and the information about the load of the plurality of nodes.

Apparatus and method for managing data stream distributed parallel processing service

Provided are a system and method for processing continuous integrated queries on both data stream and stored data using user-defined shared trigger. The system includes a data stream manager for managing data stream inputted from outside; a continuous integrated queries manager for managing the continuous integrated queries inputted from an external application; a trigger manager for managing the user-defined shared trigger inputted from the external application and registering the user-defined shared trigger in an external database; a trigger result manager for forming and managing a trigger result set from a performance result of the user-defined shared trigger registered in the cooperation database; and a continuous integrated queries performer for processing the continuous integrated queries referring to the transmitted data stream and trigger result set.

System and method for processing continuous integrated queries on both data stream and stored data using user-defined shared trigger

Disclosed herein is an apparatus for producing 3D sound. The apparatus includes a determination unit, a mono sound spreading unit, a stereo sound spreading unit, a selection unit, and a 3D sound accelerator. The determination unit receives a source sound file and determines whether the source sound file is mono or stereo. The mono sound spreading unit converts the source sound into pseudo-stereo sound and performs sound spreading on the pseudo-stereo sound, if the source sound is determined to be mono. The stereo sound spreading unit performs sound spreading on the source sound, if the source sound is determined to be stereo. The selection unit receives the output of the mono sound spreading unit or stereo sound spreading unit, and transfers the output to headphones if the headphone reproduction has been selected. The 3D sound accelerator receives the output from the selection unit if speaker reproduction has been selected, removes crosstalk from the output, and transfers the crosstalk-free output to speakers.

Apparatus and method for producing 3D sound

Growing community of inventors

Daejeon, South Korea

Myung-Cheol Lee