UPD64084 NEC, UPD64084 Datasheet - Page 23

• Manufacturer Part Number: UPD64084
• Description: THREE-DIMENSIONAL Y/C SEPARATION LSI WITH ON-CHIP MEMORY
• Manufacturer: NEC

9. WCV-ID DECODER / ID-1 DECODER BLOCK
signal of 22H and 285H (The wide clear vision standard applies only in Japan).
9.1
items. If all these items turn out to be normal, an ID signal is detected. The check and decode results are output to the
ED2 bit and bits B3 to B17 on the serial bus, respectively. In addition, the phase of the confirmation signal is detected.
This block decodes ID-1 signal of 20H/283H and an identification control signal superimposed on a wide clear vision
The WCV-ID decoder checks whether the video signal contains an ID signal by examining mainly the following seven
<1> A difference in DC level between B1 and B2 is not smaller than a certain value.
<2> The DC level of the SCH part is not higher than a certain value.
<3> The f
<4> The f
<5> Items <1> to <4> continue for at least 12 fields.
<6> The parity of the NRZ part (B3 to B5) is normal.
<7> The CRC of the NRZ part and SCH part (B3 to B23) is normal.
Note If an error is detected in item <6> or <7>, bits B3 to B17 on the serial bus hold the decoded value for the
WCV-ID Decoder
previous field.
SC
SC
SA02
Color
burst
amplitude of the NRZ part is not larger than a certain value.
amplitude of the SCH part is not smaller than a certain value (if FSCOFF = 0),
ED2 bit (0: No ID signal, 1: ID signal)
MSB
1
NRZ part
0
Figure 9-1. Wide Clear Vision ID Signal Configuration
LSB
Data Sheet S16021EJ2V0DS
SA03
MSB
Note
SCH part
Note
CRC code
LSB
0
Confirmation
signal
PD64084
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