Devices, systems and methods for converting analog data to digital data or digital data to analog data for enabling speech recognition processing on a portable data device are provided. The system includes at least one portable data device including an input module configured to receive analog audio signals; a processing module configured to convert the analog audio signals to digital audio data; a communication module configured to transmit the digital audio data to a remote processor and to receive digital text data from the remote processor; and a display module for displaying the received digital text data; the remote processor configured for receiving digital audio data, converting the digital audio data to digital text data and transmitting the converted digital text data to the at least one portable data device; and a communications network for coupling the remote processor to the at least one portable data device.