CXD2755Q

CXD2755Q Super Audio CD Format Book ANNEX D&E Conformal Metering Description The CXD2755Q is the signal processor for signal level measurement of DSD (Direct Stream Digital) conformed to ANNEX D&E of Super Audio CD Format Book V1.2. This LSI can measure up to 8 channel DSD signals to detect the maximum level of each frequency band specified in ANNEX D&E of Super Audio CD format and output the peak values of every 44.1kHz cycle for the signal level measurement and display. Functions Up to 8 channels of 1bit, 2.8224MHz (44.1kHz × 64) DSD input supported. MaxPeak measurement (ANNEX D3): 28-tap 1st-order moving average filter is used for MaxPeak level measurement. DC removal filter: DC removal filter (fc = about 0.1Hz) is inserted to HF/MF/LF filters. HF measurement (ANNEX D4): 40kHz 5th-order Butterworth high-pass filter and 100kHz 5th-order Butterworth low-pass filter are used for HF band measurement. In addition, "Mean-Square" and "Square-Root" are calculated for RMS metering. MF measurement (ANNEX E2): 20kHz 10th-order Butterworth high-pass filter and 50kHz 5th-order Butterworth low-pass filter are used for MF band measurement. LF measurement: 20kHz 10th-order Butterworth low-pass filter is used for LF band measurement. DC measurement (ANNEX E4): 0.1Hz 2nd-order low-pass filter is used for DC measurement. MF over warning flag (ANNEX E2): As the MF specification has the exceptional condition for warning, the signal level of MF and LF are continuously compared a...