PNX1301EH NXP Semiconductors, PNX1301EH Datasheet - Page 121

• Manufacturer Part Number: PNX1301EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1301EH

• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
Figure 7-24. YUV interspersed to co-sited conversion.
Figure 7-22. Image storage in planar memory format
for YUV 4:2:2.
Figure 7-23. YUV 4:2:2+alpha overlay format.
7.13.1
The EVO accepts data from SDRAM in either YUV 4:2:2
co-sited, YUV 4:2:2 interspersed, or YUV 4:2:0 inter-
spersed formats. If the input data is in YUV 4:2:2 or YUV
4:2:0 interspersed format, interspersed-to-co-sited con-
version is performed to generate co-sited output. The
EVO uses a 4-tap, (–1, 5, 13, –1)/16 filter to perform this
conversion on the U and V chroma data.
shows an example of interspersed to co-sited conversion.
Y_BASE_ADR
U_BASE_ADR
OL_BASE_ADR
OL_OFFSET
Y_OFFSET
U_OFFSET
Output Pixels: YU’V’
YUV 4:2:2 Interspersed to YUV 4:2:2
Co-sited Conversion
Y0
Input Pixels: YUV
pix0
pix0
pix0
U0
WIDTH/2 pixels
pix1
pix2
pix1
α
YUV 4:2:2+α
pix2
OVERLAY_WIDTH pixels
pix2
•
WIDTH pixels
•
•
•
•
•
•
Y1
V_BASE_ADDR,
•
(Repeated for
•
V_OFFSET)
Figure 7-24
V0
W–1
W–1
pix
pix
Co-sited Chrominance Output:
U’,V’ = (–1,5,13,–1)/16×U,V
Chrominance (U,V)
samples
α
7.13.2
YUV 4:2:0 to YUV 4:2:2 conversion is a variation of YUV
4:2:2 interspersed-to-co-sited conversion. The YUV
4:2:0 format has the U and V pixels positioned between
lines as well as between pixels within each line. It also
has half the number of U and V pixels compared to YUV
4:2:2 formats. The EVO converts YUV4:2:0 to YUV 4:2:2
co-sited by using the U and V chrominance pixel values
for both surrounding lines and converting the resulting U
and V pixels from interspersed to co-sited format. This is
shown in
and V, the PNX1300 ICP unit can be invoked on U and
V to convert from YUV 4:2:0 to YUV 4:2:2 interspersed.
7.13.3
In the YUV-2× modes, the EVO performs 2× horizontal
upscaling of the YUV data from SDRAM. No vertical up-
scaling is performed. The width of the result image
(IMAGE_WIDTH) should be an even number. Upscaling
is performed by 4-tap filtering. For all 3 memory formats,
Y luminance data is upscaled using a (–3,19,19,–3)/32
filter to generate the missing output pixels. Output pixels
at the same location as the input pixels use the corre-
sponding input pixel values, as shown in
The U and V chrominance values are generated in the
same way as the Y luminance signal for 2× upscaling, as-
suming that both the input and output use YUV 4:2:2 co-
sited chrominance coding. The U and V output pixels at
the same location as the U and V input pixels use the cor-
responding input pixel values. The U and V output pixels
between the U and V input pixels are generated using the
(–3,19,19,–3)/32 filter, as shown in
If the input chroma is interspersed, a (–1,13,5,–1)/16 fil-
ter is used to generate the U and V output pixels that are
displaced by half a Y pixel from the U and V input pixels,
and a (–1,5,13,–1)/16 filter is used to generate the addi-
tional upscaled U and V output pixels that are displaced
by 1. 5 pixels from the U and V input pixels. This is shown
in
7.13.4
The EVO uses a 4-tap filter for upscaling and for convert-
ing from interspersed to co-sited format. One extra pixel
is needed at the beginning and two at the end of each
line processed by this filter. These pixels are supplied
PRELIMINARY SPECIFICATION
Figure
7-27.
Figure
YUV 4:2:0 to YUV 4:2:2 Co-sited
Conversion
YUV-2x Upscaling
Pixel Mirroring for Four-tap Filters
Luminance
samples
7-25. For true vertical re-sampling of U
Enhanced Video Out
Figure
Figure
7-26.
7-26.
7-11