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The signal is converted to a serial signal in the HDMI TRANSMITTER together with the video signal, and the serial
signal is output from the HDMI connector CN3 on the VPR-118 board.
1-13-3.
Synchronization Signal Processing System
The reference video signal input from the REF.VIDEO INPUT connector (CN5) on the VPR-118 board is transferred
to the SYNC SEP circuit for separating the sync signals. The separated sync signals are input into PHOT (IC900) on
the HPR-55 board.
PHOT generates the following clock signals in synchronization with the separated sync signals or the extracted sync
signals from the reference video signal or from the SD/HDSDI input signal.
• 74.25 MHz/74.1758 MHz reference clocks
• 27 MHz reference clock
• 24.576 MHz (512 FS) reference clock
With these reference clocks, PHOT generates sync timing signals such as HD, VD, and Frame, and supplies them to
devices together with the clock signals.
When no signals are input into the REF.VIDEO INPUT connector or SD/HDSDI INPUT connector, sync timing signals
are generated from the 74 MHz or 27 MHz clock of free-running oscillation.
1-13-4.
IO System Control System
This unit mounts a RISC microprocessor (referred to as CPU: IC101/SY-438 board hereafter) as a I/O system control
CPU compatible with a real-time OS "iTRON", which provides the functions below.
PCI Bus Interface
The CPU is connected to PIERe (IC1200)/PHOT (IC1900) on the HPR-55 board via the PCI bus interface to control
them and for mutual data transfer.
The CPU also sends/receives data to/from the following devices through PIERe.
• DEC/ENC Proxy Audio DSP (IC1600, IC1601/HPR-55 board)
• LVIS (IC500/HPR-55 board)
Furthermore, the CPU also sends/receives data to/from the following devices through PHOT.
• VAX (IC200/HPR-55 board)
• A/D converter for DC power voltage detection (IC1133/HPR-55 board)
• D/A converter for free-running frequency adjustment (IC1100/HPR-55 board)
• REC AUDIO DSP, PB/MONI AUDIO DSP (IC1500, IC1501/HPR-55 board)
• NATH (IC600/HPR-55 board)
• Analog audio control (AU-366 board)
• EEPROM for analog audio level data saving (IC806/AU-366 board)
• ROVO (IC300/VPR-118 board)
• D/A converter (IC502/VPR-118 board) for adjusting composite video level and SC phase
• VSW (IC801/VPR-118 board)
• D/A converter (IC502/VPR-118 board) for saving composite video level data and adjusting SYSTEM SC
• Character generator (IC105, IC106/VPR-118 board)
• FPAC (IC401/FP-209 board )
This CPU is also connected to the CPU board through the PCI-PCI Bridge in PHOT to transfer data between the IT
system and the IO system.
PDW-HD1550
1-34
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