The DTC-320 StreamXpert is software for analyzing and monitoring MPEG-2 transport streams. It can decode and analyze DVB/SI and ATSC/PSIP tables, provide detailed PID and service statistics, and monitor streams for TR 101 290 compliance using customizable templates. It supports SD and HD video decoding and works with various input adapters, making it a portable transport stream analyzer. Its applications include transport stream validation, debugging of output equipment, and quality monitoring in broadcast environments.