Philips CD721 - Page 30

Peak detector output
In place of the CRC-bits(Cyclic Redundancy
Check) 81 to 96, the peak detector information is added
to the Q-channel data. The peak information corresponds
to the highest audio level and is measured on positive
peaks.
Digital output interface
The biphase-mark digital output signal at pin DOBM is
according to the format defined by the IEC958 specificati-
on. The digital audio output consists of 32-bit words
transmitted in biphase-mark code( two transitions for
logic 1 and one transition for a logic 0). Left and right
audio samples are transmitted alternately.
Kill circuit
The kill circuit detects digital silence by testing for an all-
zero or all-ones data word in the left or right channel
before the digital filter. The. KILL pin 27 is active-LOW
when digital selence has been detected in. the LEFT
channel for 200 ms, and V3 pin 26 is active-LOW when
digital silence has been detected in the RIGHT channel
for 200 ms. _— ;
When MUTE is active then the KILL outputs are forced
LOW.
PCS 60 963