Abstract: Disclosed is a method for suppressing an inter-carrier interference and noise signal, and an orthogonal frequency division multiplexing receiver for performing the same. Here, a method for an orthogonal frequency division multiplex (OFDM) receiver to suppress an inter-carrier interference and noise signal by using a symbol interference free interval without inter-symbol interference (ISI) in a guard interval (GI) includes: performing a weighting operation between sample data of the symbol interference free interval and sample data of the effective symbol interval by using a signal-to-noise ratio (SNR) of the symbol interference free interval and an SNR of an effective symbol interval corresponding to the symbol interference free interval; and performing a fast Fourier transform (FFT) on FFT input data configured by including the weighting-operated sample data into the effective symbol interval.

Abstract: An audio system sets a signal line path between the medium of an audio device and an external device and uploads a digital audio file from the external device to the audio device according to a user's manipulation of the audio. In addition, a communication system selectively uses USB and UART communications by commonly using a single USB connector and connects a connector of an external device and an audio/USB/UART common connector through a single cable, so that audio/USB or audio/UART signals are selectively outputted through a common audio signal line. Accordingly, the audio system can interface with various kinds of external devices without external modification or additional installation of a dedicated interface in the audio device with a USB connector. In addition, the USB/UART common communication system can commonly use the USB connector without regard to USB and UART connection signals and can selectively output the audio/USB or audio/UART signals through the single cable in the audio device.

Abstract: Provided a media connect device which serves as a medium between a media player and an audio device, controls the media player in response to a user's manipulation of the audio device, performs USB-packet processing on an audio signal reproduced by the media player, and provide the audio signal packets to the audio device such that sound can be outputted from the audio device. Through the media connect device, an audio device having a USB host interface can be connected to an existing media player without the exterior being modified. Further, even in a case of DRM contents, a user can enjoy songs, which have been previously purchased, without a separate software being supported or repurchased.

Abstract: An audio system sets a signal line path between the medium of an audio device and an external device and uploads a digital audio file from the external device to the audio device according to a user's manipulation of the audio. In addition, a communication system selectively uses USB and UART communications by commonly using a single USB connector and connects a connector of an external device and an audio/USB/UART common connector through a single cable, so that audio/USB or audio/UART signals are selectively outputted through a common audio signal line. Accordingly, the audio system can interface with various kinds of external devices without external modification or additional installation of a dedicated interface in the audio device with a USB connector. In addition, the USB/UART common communication system can commonly use the USB connector without regard to USB and UART connection signals and can selectively output the audio/USB or audio/UART signals through the single cable in the audio device.

Abstract: A media processing device uses an external storage device. The media processing device includes a storage device access module, an information source, a program memory, a system memory, a signal processor, a user interface and a system controller. The system controller accesses the external storage device, reads file information, and constructs contents to be displayed. When the system controller receives a command to select a media file, the system controller accesses the external storage device, searches for the selected media file, reads data of the searched media file, copies the read data, and provides the copied data to be decoded. When the system controller receives a commend to encode a signal, the system controller controls the signal processor to encode the input signal into media data, constructs a media file from the encoded media data, positions the media file, and copies the constructed media file when the external storage device is accessible through the storage device access module.

Abstract: Disclosed herein is a media processing device using an external storage device. The media processing device includes a storage device access module, an information sourcing module, a program memory module, a system memory module, a signal processing module, a user interface module and a system control module. The system control module accesses the external storage device, reads file information, and constructs contents to be displayed. When the system control module receives a commend to select a media file, the system control module accesses the external storage device, searches for the selected media file, reads data of the searched media file, copies the read data, and provides the copied data to be decoded.