tm1300 NXP Semiconductors, tm1300 Datasheet - Page 115

• Manufacturer Part Number: tm1300
• Description: Tm-1300 Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Figure 7-24. YUV interspersed to co-sited conversion.
Figure 7-25. YUV 4:2:0 to YUV 4:2:2 co-sited conversion.
7.13
The memory video image data formats are converted to
the output YUV 4:2:2 co-sited format and optionally up-
scaled 2 horizontally. The conversion algorithms are
detailed below.
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
Output Pixels: YU’V’ 4:2:2
Input Pixels: YUV 4:2:0
VIDEO IMAGE CONVERSION
ALGORITHMS
Output Pixels: YU’V’
YUV 4:2:2 Interspersed to YUV 4:2:2
Co-sited Conversion
Input Pixels: YUV
Y0,0
U0,0; V0,0
Y0,0; U0,0; V0,0
Co-sited Chrominance Output:
U’,V’ = (–1,5,13,–1)/16 U,V
Chrominance (U,V)
samples
Co-sited Chrominance Output:
U’,V’ = (–1,5,13,–1)/16 U,V
Chrominance (U,V)
samples
conversion on the U and V chroma data.
shows an example of interspersed to co-sited conversion.
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 TM1300 ICP unit can be invoked on U and V
to convert from YUV 4:2:0 to YUV 4:2:2 interspersed.
PRODUCT SPECIFICATION
Luminance
samples
Figure
YUV 4:2:0 to YUV 4:2:2 Co-sited
Conversion
Luminance
samples
7-25. For true vertical re-sampling of U
Enhanced Video Out
Y0
Y1
Y2
Y3
Y0, U0, V0
Y1, U0, V0
Y2, U2, V2
Y3, U2, V2
U0, V0
U2, V2
Figure 7-24
7-11