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DivFix++ AVI Fix
Meteorite MKV RepairShutter Control for 3D Glasses
The BCM20730, combined with the BCM20702, provides full system support for 3D glasses on televisions. The
BCM20702 gets frame synchronization signals from the TV, converts them into proprietary timing control
messages, then passes these messages to the BCM20730. The BCM20730 uses these messages to synchronize
the shutter control for the 3D glasses with the television frames.
The BCM20730 can provide up to four synchronized control signals for left and right eye shutter control. These
four lines can output pulses with microsecond resolution for on and off timing. The total cycle time can be set
for any period up to 65535 msec. The pulses are synchronized to each other for left and right eye shutters.
The BCM20730 seamlessly adjusts the timing of the control signals based on control messages from the
BCM20702, ensuring that the 3D glasses remain synchronized to the TV display frame.
3D hardware control on the BCM20730 works independently of the rest of the system. The BCM20730
negotiates sniff with the BCM20702 and, except for sniff resynchronization periods, most of the BCM20730
circuitry remains in a low power state while the 3D glasses subsystem continues to provide shutter timing and
control pulses. This significantly reduces total system power consumption.