Why does the QDesign Music Codec perform so much better than other codecs at low bitrates?
1.The QDesign Music Codec takes a fundamentally new approach to encoding audio for low bitrate applications. Older technology, psychoacoustic codecs (such as MPEG, AC-3) analyze the audio through static filterbanks or transforms, which are used to approximate the characteristics of the human auditory system. These systems were developed to minimize the bitrate required to preserve ‘transparent’ audio quality, and were not designed to function below the threshold where coding artifacts become audible. 2. Although the QDesign Music Codec employs well-known psychoacoustic principles in the analysis, it also builds a source model of the signal, separating the signal into perceptually-relevant ‘audio building blocks’ and developing a parametric representation which can be efficiently encoded for transmission or storage. 3. This joint source and receiver model allows the QDesign Music Codec to minimize audible distortion well below the bitrates previously attained by codecs employing psychoa
Related Questions
- OK, a Layer-2 codec at low bitrates may sound poor today, but couldn that be improved in the future? I guess you just told me before that the encoder is not fixed in the standard.
- I export a file using the QDesign Music Codec, and nothing happens for a very long time. Am I doing something wrong?
- Why does the QDesign Music Codec perform so much better than other codecs at low bitrates?
