Electronics and Telecommunications Research Institute

Hae-Won Jung

Bheom-Soon Joo

Hyeong-Ho Lee

Dae-Ub Kim

Tae-Sik Cheung

Do-Young Kim

Mi-Suk Lee

Byungjun Ahn

YongWook Ra

Myung-Hee Son

Jong-kuk Lee

Jin-Ho Hahm

Sung-soo Kang

Tae-kyu Kang

Provided is an audio coding apparatus and method that can selectively apply a operation mode of a coding module for stereo or multi-channel representation according to input signal characteristics of each channel, when voice or music signals are transmitted using an audio codec in portable terminals capable of stereo or multi-channel input and output. The audio coding apparatus includes a down-mixer for down-mixing multi-channel audio signals into mono signals; a coder for coding the mono signals; an input channel correlation analyzer for deciding whether to give them stereo effect based on their signal distribution characteristics, and outputting a control signal indicating whether to perform stereo representation process; and a stereo representation unit for performing stereo representation process onto the multi-channel audio signals when the control signal indicating to perform stereo representation process.

Apparatus and method for coding audio data based on input signal distribution characteristics of each channel

Provided are a packet processing apparatus for realizing a wire-speed, and a method thereof. The packet processing apparatus realizes a wire-speed by making an inputted packet be processed in another packet processing apparatus instead of processing the inputted packet for itself. The packet processing apparatus for realizing a wire-speed by having an inputted packet processed in a packet processor of another packet processing apparatus by making an inputted packet detour a packet processor into a detour path, includes: a packet classifier for classifying and storing the inputted packet in a multi-queue based on a priority; a queue manager for including the multi-queue, determining a detour packet among packets stored in the multi-queue and marking the packet as a detour packet; and a packet scheduler for transmitting the packet designated as the detour packet to the detour path. The apparatus is used for a packet communication system.

Packet processing apparatus for realizing wire-speed, and method thereof

An apparatus and method for a redundancy control in duplex switch boards in a high speed network system are provided. The apparatus includes: a switching unit for switching data inputted one of the duplex switch boards to a destination line card; a state controlling unit for controlling a clock state of an opponent switch board between the duplex switch boards; an IPC controlling unit for controlling an inter processor communication (IPC) of a platform of the communication network system; a processing unit for controlling the IPC controlling unit and the state controlling unit of the duplex switch boards; and a clock controlling unit for synchronizing a clock between the duplex switch boards.

Apparatus and method for redundancy control of duplex switch board

Provided are a data receiving apparatus that can determine data by adjusting a reference level for determining a logic value of inputted data based on Inter-Symbol Interference in a data signal inputted through a transmission line, and receive the data without errors by compensating for timing margin decrease caused by the inter-symbol interference, and a method thereof. The apparatus includes: a reference generator for monitoring the level of an inputted data signal or generating reference levels according to an external control command; a comparator for comparing the inputted data with the reference levels and determining logic values of the inputted data; a selector for selecting the logic values of the inputted data as a valid logic value; and a selection controller for monitoring the valid logic value of the selector, transmitting a selection control signal to the selector, and controlling a process for selecting the valid logic value.

Data receiving apparatus capable of compensating for reduced timing margin caused by inter-symbol interference and method thereof

Provided is an Ethernet port apparatus supporting multiple physical media, a physical medium managing method, and a switching system using the same. The Ethernet port apparatus of the present research can use and manage multiple transmission media by freely selecting and exchanging the transmission media in a system using an Ethernet port. The Ethernet port apparatus supporting multiple physical media, which includes: a main board unit for supporting hot swap and power supply; a detachable physical medium-based sub-board unit for generating a control signal, transmitting the control signal to the main board means, performing a transceiving function suitable for the desired physical medium; and a physical medium support fixing unit for transmitting variable power, a power control signal, a physical medium control signal, a physical medium state information, and physical medium-dependent bitstream between the main board unit and the sub-board unit.

Ethernet port apparatus supporting multiple physical media, media managing method therefor, and switching system using the same

Provided is a topology discovery method for an Ethernet network that can effectively discover a physical topology with respect to the Ethernet network of a mesh structure without developing and using a separate control protocol. The topology discovery method in an Ethernet network includes the steps of: acquiring an interface management information base (MIB) and a bridge MIB; defining and storing information for discovering a physical topology; discovering an edge bridge that divides a boundary between a bridge network and a host network; discovering the physical topology with respect to the bridge network by using the schema; discovering the connection relationship with the host network by using an address learning address forwarding table (AFT) with respect to the edge bridge included in the bridge network; and outputting the connection relationship of the bridge network and the host network as a graph.

Method for discovering topology in Ethernet network

A method for providing IP multicast service using a VLAN in a network including an IP multicast/VLAN manager for supporting an IGMP and a GVRP, and multicast group members, includes: after generating an IP multicast group, allowing a sender to request the IP multicast/VLAN manager to search for at least one host joining the IP multicast group; allowing the IP multicast/VLAN manager to check whether the host supports the VLAN; and allowing the sender to transfer a packet through the VLAN if the host joining the IP multicast group supports the VLAN and allowing the sender to broadcast a packet though IP multicast if not.

Method for providing IP multicast service using virtual LAN

Provided are a method and apparatus for multiplexing and demultiplexing variable-length high-speed packets. According to the method and apparatus, a plurality of one-gigabit Ethernet frames are multiplexed into a single 10-gigabit Ethernet frame and the single 10-gigabit Ethernet frame is demultiplexed into the plurality of one-gigabit Ethernet frames. In order to process variable-length high-speed packets, packet multiplexing instead of simple TDM is used and a larger input bandwidth than an output bandwidth is used, so that a statistical multiplex effect is accomplished. In addition, standard interface is used for input and output interface, so existing universal chips can be used.

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Daejon, South Korea

Hae-Won Jung