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.