PCM sound transmission system using quadrature amplitude modulation of the video carrier is evaluated to apply second generation EDTV(Enhanced TV) by BTA(Broadcasting Technology Association) audio working group. The system employs ISO/IEC 11172-3 Layer H for a source coding method. Besides the conventional two analog sound channels, four digital sound channels are available due to the sophisticated compression technique. Subjective tests to assess the impaired sound signal with transmission error was conducted. Acceptable quality of the impaired sound signal is clarified by the result.
