cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 276

• Manufacturer Part Number: cx25870
• Description: Video Encoder With Adaptive Flicker Filtering And Hdtv Output
• Manufacturer: Conexant Systems, Inc.

Appendix E HDTV Output Mode
E.6 Allowable Resolutions
Table E-5. CX25870/CX25871 HDTV Supported Formats
E-12
(does not contain trilevel
(contains trilevel syncs)
(contains trilevel syncs)
1920x1080 = 1080i
1280x720 = 720p
720x480 = 480p
(H x V )
Format
Active
syncs)
SMPTE-274M
SMPTE-296M
SMPTE-293M
Governing
Standards
E.6 Allowable Resolutions
Table E-5
supported by the CX25870/871.
displayed with the RASTER_SEL[1:0] = 00 option. This flexibility allows the
CX25870/871 to receive resolutions not yet standardized. All HDTV Output
Mode resolutions will generate the new WSS wide screen format that provides an
aspect ratio of 16:9 yielding a movie-theatre like viewing experience.
filter blocks are bypassed. Therefore, the Y/P
not have any flickering filtering nor any overscan compensation applied to them.
For 480p, 720p, and other progressive input formats, the lack of flicker filtering
causes no degradation whatsoever in the video output quality as compared to the
digital input. For 1080i and other interlaced input formats, the lack of flicker
filtering sets off the appearance of minor flickering in screen regions with small
vertical dimensions.
horizontal and vertical edges of the active image to appear behind the bezel of the
television. This annoyance can be overcome by the insertion of a solid colored
border around the active image itself by the data master in the digital domain.
EIA-770.3
EIA-770.3
Conceivably, any HD format with a clock less than or equal to 80 MHz can be
When the encoder is in HDTV Output Mode, the internal FIFO and flicker
The lack of overscan compensation in HDTV Output Mode results in the outer
&
&
summarizes the most popular HD resolutions or ATSC video formats
(can be muxed or nonmuxed)
16 or 24 bit Digital YP
16 or 24 bit Digital YP
16 or 24 bit Digital YP
15, 16, or 24 bit RGB or
15, 16, or 24 bit RGB or
15, 16, or 24 bit RGB or
Conexant
Input Data Format
Flicker-Free Video Encoder with Ultrascale Technology
B
B
B
P
P
P
R
R
R
B
/P
Output Aspect
R
and R/G/B video outputs do
Ratio
16 : 9
16 : 9
16 : 9
CX25870/871
noninterlaced
noninterlaced
Frame Rate
interlaced
30 Hz.
60 Hz.
60 Hz.
100381B