How does the HDCD Decoder expand the dynamic range during decoded playback?
All CDs sound better on HDCD-equipped CD players because the HDCD Process Decoder also functions as a state-of-the-art digital filter. An HDCD encoded CD when played on an HDCD decoding CD player delivers unparalleled sound quality because; 1) the recording was made using the Model 1 (or Model 2) HDCD Digital Processor which yields the benefits of extremely accurate A/D conversion, Peak Extend (PE), Low Level Extension (LLE), and high frequency dither addition, 2) The HDCD decoder uses an interpolation filter complementary to the anti-alias filters used in the A/D filter switching process, 3) the HDCD decoder decodes Peak Extend (PE) and Low Level Expansion (LLE). The combination of these three items (PE, LLE, and dither) results in a signal with an effective dynamic range of almost 20 bits.
