| Popis: |
The purpose of this paper is to discuss the statistical analysis of the outcome of subjective tests on the basic audio quality (BAQ) of several 5-channel audio bitrate reduction systems. The test conditions are based on the ITU-R-Draft Recommendation “Methods for the Subjective Assessment of Small Impairments in Audio Systems including Multichannel Sound Systems”. The report on the MPEG test contains a complete explanation and presentation of the results. The aims of the tests were the verification of the recent audio quality of 8 codec systems under test and the comparison between two types of codec systems: MPEG-codecs, backwards compatible (BC): Layer II and Layer III at 320 kbit/s; and non-backwards-compatible codecs (NBC): Dolby (denoted by NBC1) and AT&T (denoted by NBC2) at 320 kbit/s. |
