Abstract: An apparatus for transmitting content includes a content request transmitter to transmit a request message for content requested by a client device to content servers, a response delay time calculator to calculate a response delay time of each content server on the basis of a response message of each content server for the request message, a byte range determiner to determine one or more content servers to which a byte range request for the content is to be transmitted, from among the content servers, on the basis of the response message and/or the response delay time and determine a size of a byte range request and the number of byte range request for each content server, and a content acquirer to acquire the content from the content servers through the byte range request based on the size of a byte range request and the number of byte range requests.

Abstract: An apparatus for transmitting content includes a content request transmitter to transmit a request message for content requested by a client device to content servers, a response delay time calculator to calculate a response delay time of each content server on the basis of a response message of each content server for the request message, a byte range determiner to determine one or more content servers to which a byte range request for the content is to be transmitted, from among the content servers, on the basis of the response message and/or the response delay time and determine a size of a byte range request and the number of byte range request for each content server, and a content acquirer to acquire the content from the content servers through the byte range request based on the size of a byte range request and the number of byte range requests.

Abstract: Provided is a method and apparatus for classifying applications in traffic easily and accurately by utilizing only statistical data of traffic at transport layer. A method of the present invention includes determining candidate applications by comparing at least one of smallest packet size, biggest packet size and average packet size of collected packets for a flow with corresponding reference data of potential applications; and comparing mode set of packet size for the collected packets with corresponding reference data of the candidate applications to identify the flow as an application which has identical elements in the same order, the number of the identical elements being equal to or more than a predetermined number.

Abstract: An apparatus for load balancing multiple servers on a network includes: a delay calculation unit for calculating a server-side delay for each server by using network transmission delay, network waiting delay, and operation processing delay of each of the servers; and a load regulating unit for regulating loads to be assigned to each server based on the server-side delay for each server calculated by the delay calculation unit. The apparatus of further includes a status detection unit for monitoring a change in the server-side delay of each server to determine the status of each server.

Abstract: Provided is a method and apparatus for classifying applications in traffic easily and accurately by utilizing only statistical data of traffic at transport layer. A method of the present invention includes determining candidate applications by comparing at least one of smallest packet size, biggest packet size and average packet size of collected packets for a flow with corresponding reference data of potential applications; and comparing mode set of packet size for the collected packets with corresponding reference data of the candidate applications to identify the flow as an application which has identical elements in the same order, the number of the identical elements being equal to or more than a predetermined number.

Abstract: Provided are a system and method for identifying a peer-to-peer (P2P) application service. The method includes the steps of: (a) collecting an Internet protocol (IP) packet and generating a flow; (b) identifying the P2P application service on the basis of a port number using the generated flow; (c) when the P2P application service is identified in step (b), verifying the identified application service; (d) when it is verified that the identification is not correct, or the P2P application service is not identified in step (b), identifying the P2P application service on the basis of a payload; (e) when the P2P application service is identified in step (d) or it is verified in step (c) that the identification is correct, generating a SET table using a flow of the identified P2P application service; and (f) identifying the P2P application service for a flow not identified in either step (b) or step (d) using the SET table.

Abstract: A dematrixing processor for an MPEG-2 multichannel audio decoder, which is capable of performing a decoding matrix process with respect to five compositely decoded signals to restore them to their original status. To this end, the dematrixing processor comprises an arithmetic/control logic unit for performing a dematrixing operation with respect to the five compositely decoded signals to restore them to their original status, and an IIR filter for low pass filtering an output signal from the arithmetic/control logic unit and providing the low pass filtered result to the arithmetic/control logic unit.

Abstract: A phase locked loop for synchronizing decoding clocks with encoding clocks in a Moving Picture Experts Group (MPEG) system. The phase-locked loop circuit includes a voltage controlled oscillator for converting a decoding clock into an encoding clock, a register unit for storing multiplexing program clock reference signals, each input with a desired number of bits, a counter being initialized by a first program clock reference signal output from the register unit, thereby generating a local program clock reference signal, and a phase error control unit for combinationally operating the program clock reference signal stored in the register unit and the local program clock reference signal, thereby generating a phase error signal for controlling the voltage controlled oscillator.

Abstract: A synthesis filter for an MPEG-2 audio decoder comprising a first coefficient ROM for storing cosine matrix coefficients therein, a first queue memory for storing subband data therein, a first MAC unit for performing a matrixing operation by multiplying the subband data stored in the first queue memory by the cosine matrix coefficients stored in the first coefficient ROM, a second queue memory for storing output data from the first MAC unit therein, a third queue memory being copied with the contents of the second queue memory, a second coefficient ROM for storing window coefficients therein, a second MAC unit for synthesizing the contents copied to the third queue memory with the window coefficients stored in the second coefficient ROM to produce audio data, an FIFO memory for storing the audio data from the second MAC unit therein, a D/A converter for converting the audio data stored in the FIFO memory into an analog audio signal and outputting the converted analog audio signal to a speaker, and a controlle

Abstract: A device and a method for performing a denormalization operation to restore channel signals, normalized into specified levels due to a multichannel process in an MPEG-2 multichannel audio decoder, to their original levels. The denormalization device performs the denormalization operation on the basis of one multiplication operation. To this end, the denormalization device comprises a ROM for storing therein denormalization information to be multiplied by data to be denormalized, a multiplier for multiplying the data to be denormalized, by the denormalization information stored in the ROM, and a controller for controlling the ROM and the multiplier.

Abstract: A composite decoding device for an MPEG-2 multichannel audio decoder. The composite decoding device is capable of simultaneously decoding information coded in a dynamic crosstalk coding manner and information coded in a phantom coding manner. To this end, the composite decoding device comprises an arithmetic unit for receiving a control word, information and a scale factor from a first-in-first-out memory, performing an arithmetic operation with respect to the received information and scale factor on the basis of a dynamic crosstalk coding manner or a phantom coding manner determined by the received control word and outputting the arithmetic result to a dual port memory, and a controller for generating a plurality of sequential control signals in response to the control word from the first-in-first-out memory to control the arithmetic unit.