
Koninklijke Philips Electronics N.V. Copyright 2001. All rights reserved.
9397 750 08865
6 of 84
Rev. 02 — 8 October 2001
Product data
PNX8510/11
Philips Semiconductors
Analog Companion Chip
2.2.1 YUV 4:2:2
This is the CCIR-656 compliant format and will mainly be used at an interface speed of 27 MHz
to feed the video encoder modules in the chip.
This is the standard interface format for the secondary video encoder pipeline unless the chip is
used in High Definition (HD) mode.
The YUV 4:2:2 format can also be used to feed the HD data path as long as the pixel clock rate
stays below 81 MHz. To operate the HD data path with 4:2:2 source material the 4:2:2 to 4:4:4
filter should be enabled to achieve the best video quality.
2.2.2 RGB 4:4:4
This mode is only useful if the HD data path in the PNX8510/11 is in operation. The RGB 4:4:4
interface mode is not applicable to the standard definition RGB path operation due to the implicit
clocking requirements. The data rate for standard definition RGB 4:4:4 data would be 13.5 MHz
per component resulting in an interface speed of 40.5 MHz. Because the chip does not contain
any PLLs, it is not possible to extract 27 MHz out of the interface clock.
2.2.3 YUV 4:4:4
This mode is useful only if the HD data path in the PNX8510/11 is in operation.
2.2.4 YUV 4:2:2 Interleaved
This mode supports two video data streams through one physical video interface. It can be used
to utilize both video encoder channels in the chip with one interface only or to hook up two
PNX8510/11 devices to one source providing an interleaved data stream. Each chip extracts
one slice from the interleaved stream. This video format is useful for the encoder standard
definition data path only.
Figure 3: YUV 4:2:2
FF
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00 EAV 80
10
80
10
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FF
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00 SAV U1 Y1
V1 Y2 U3
Y3
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.
Figure 4: RGB 4:4:4
FF
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00 EAV 80
10
80
10
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FF
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00 SAV R1 G1
B1 R2 G2
B2
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Figure 5: YUV 4:4:4
FF
00
00 EAV 80
10
80
10
..
FF
00
00 SAV Y1 U1
V1 Y2 U2
V2
..
.
Figure 6: YUV 4:2:2 Interleaved
FF
00
00 EAV EAV 80
80
10
..
.
FF
00
00 SAV SAV U1
a
U1
Y1
V1
Y2
b
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