JVC RX-D702, RX-D402 RangeRangeExpansionExpansionSectionSection, Range Expansion Block Diagram

CC Converter

FrequencyFrequencyConversionConversionSectionSection

RX-D702

The frequency conversion section doubles or quadruples the sampling frequency for playback of high-frequency signals that a following stage generates.

RangeRangeExpansionExpansionSectionSection

The range expansion section applies the JVC-exclusive range expansion processing to compensate for the conversion distortion that occurs when the analog signal is converted into a digital signal.

The human ear, it is said, cannot hear frequencies above 20kHz, but removing frequencies higher than 20kHz changes the waveform of audible frequencies, resulting in a signal that sounds different from the original. The range expansion section overcomes this problem by deducing the original waveform of a signal before A/D and D/A conversion and modifying the signal’s waveform accordingly. For playback of frequencies above 20kHz generated by this waveform processing, the range expansion section has a frequency conversion section preceding it.

Range Expansion Block Diagram

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