Abstract: An orthogonal frequency division multiplexing (OFDM) signal transmission apparatus and a method thereof are disclosed. The OFDM signal transmission apparatus includes an inverse Fourier transform (IFT) unit for transforming a frequency domain OFDM signal to a time domain OFDM signal according to one of transmission modes of 4K, 16K, and 32K; a guard interval inserting unit for inserting a guard interval into the transformed time domain OFDM signal according to a predetermined guard interval inserting rate; and a transmitting unit for transmitting the OFDM signal having the guard interval. Therefore, the data transmission rate is enhanced.

Abstract: A method and apparatus for efficiently transmitting large multimedia data over a wireless network are provided. A wireless device includes a device information reading unit which receives and reads information regarding available capabilities of devices included in a wireless network; a control unit which selects a first device which can process a video stream and a second device which can process an audio stream from the devices based on the information; a stream generation unit which generates a video stream and an audio stream which form the same content; and a wireless transmission/reception unit which transmits the generated video stream to the first device and transmits the generated audio stream to the second device.

Abstract: A transmission packet structure for transmitting uncompressed AV data is provided. The transmission packet structure includes a payload including multiple TDUs error-correction coded at a predetermined coding rate, wherein the payload is classified according to importance of bits constituting the uncompressed AV data; a MAC header added to the payload, wherein information for medium access control is recorded in the MAC header; and a PHY header comprising information about the coding rate, wherein the PHY header is added to the MAC header.

Abstract: A beacon packet is provided. The packet includes a first information field that includes channel-time-allocation information in a wireless network; and information about whether there is residual channel time that can be allocated to a device that belongs to the wireless network.

Abstract: Apparatuses and methods are provided for transmitting/receiving uncompressed data in which, when the uncompressed data is transmitted or received over a wireless network, different code rates are applied to the data according to the significance of bits or bit groups included in the data. An apparatus for transmitting uncompressed data includes: a mode determining unit which determines a mode corresponding to a condition; a grouping unit which classifies bits of each pixel included in the uncompressed data into at least two groups according to the mode; an error correction coding unit which performs error correction coding on each of the groups at a code rate corresponding to the mode; and an RF processing unit which transmits the coded uncompressed data.

Abstract: A method and apparatus for efficiently transmitting large multimedia data over a wireless network are provided. A wireless device includes a device information reading unit which receives and reads information regarding available capabilities of devices included in a wireless network; a control unit which selects a first device which can process a video stream and a second device which can process an audio stream from the devices based on the information; a stream generation unit which generates a video stream and an audio stream which form the same content; and a wireless transmission/reception unit which transmits the generated video stream to the first device and transmits the generated audio stream to the second device.

Abstract: A method and apparatus of transmitting uncompressed audio and/or video (AV) data are provided. The method includes transmitting the uncompressed AV data; determining whether an error occurs in the uncompressed AV data during the transmission; and if it is determined that the error occurs in the uncompressed AV data, retransmitting a portion of the uncompressed AV data having a predetermined level of significance.

Abstract: Provided is a method of differentially coding uncompressed AV data. A method for transmitting uncompressed AV data according to an embodiment of the invention includes grouping bits of the uncompressed AV data into a plurality of groups according to significance of the bits; determining a code rate for every group; applying error correction coding to each group at the determined code rate; and transmitting the groups to which the error correction coding has been applied.

Abstract: An unequal-error-protection method is disclosed. The method includes performing error-correction coding in parallel; and performing symbol mapping by applying one of a plurality of gains to each of the plurality of error-correction-coded bit streams.

Abstract: Provided is a radio communication technique, more particularly, a method and apparatus for formatting a transmission packet according to significance of data. A method of transmitting uncompressed AV data includes receiving bits constituting the uncompressed AV data; separating the received bits into a plurality of bit levels according to significance; multiplexing the separated bits according to the bit levels; and transmitting the multiplexed bits.

Abstract: An apparatus and a method for high-speed data transceiving, and an apparatus and a method for error-correction processing for the same are provided. The high speed data transmitting apparatus includes an error-correction coding unit which performs error-correction coding of input data in parallel, and a radio-transmitting unit which processes the input data which has been error-correction coded by the error-correction coding unit and outputs the input data which has been processed to a wireless medium.

Abstract: A decoding device having a turbo decoder and an RS decoder concatenated serially and a method of decoding performed by the same. A turbo decoder decodes received data of a channel and an RS decoder RS decodes the turbo decoded data. A controller controls the turbo decoder to iteratively turbo-decode the data according to a number of iterations determined by a stored iteration number and to cease the turbo decoding if an error correction completion signal is received from the RS decoder. The controller decreases the iteration number for a next frame of the data if the completion signal is received within the predetermined number of iterations and increases the iteration number for a next frame if the completion signal is not received within the predetermined number of iterations. The iteration number is changeable within maximum and minimum limits and may exceed the maximum limit in special cases.

Abstract: A decoding device having a turbo decoder and an RS decoder concatenated serially and a method of decoding performed by the same. A turbo decoder decodes received data of a channel and an RS decoder RS decodes the turbo decoded data. A controller controls the turbo decoder to iteratively turbo-decode the data according to a number of iterations determined by a stored iteration number and to cease the turbo decoding if an error correction completion signal is received from the RS decoder. The controller decreases the iteration number for a next frame of the data if the completion signal is received within the predetermined number of iterations and increases the iteration number for a next frame if the completion signal is not received within the predetermined number of iterations. The iteration number is changeable within maximum and minimum limits and may exceed the maximum limit in special cases.