Video Encoder. CX25899 Datasheet
Video Encoder with Adaptive
Flicker Filtering and HDTV
February 14, 2006
© 2006, Conexant Systems, Inc.
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Conexant Proprietary and Confidential
This document contains information on a new product. The parametric information,
although not fully characterized, is the result of testing initial devices.
Video Encoder with Adaptive Flicker Distinguishing Features
Filtering and HDTV Output
4 high-performance, 10-bit DACs
HDTV output mode
Conexant’s CX25898/9 is specifically designed to meet TV out system
requirements for the next-generation desktop PCs, notebook PCs, game
consoles, portable media players, progressive DVD players, and set-top
boxes. With software-forward compatibility to the CX25870/1/2/3/4/5,
manufacturers can quickly bring to market new solutions that require
adaptive flicker filtering, ATSC High-Definition Television (HDTV) outputs,
and standard TV out active VGA resolutions from 320 x 200 (minimum) to
1024 x 768 (maximum).
Adaptive flicker filtering is a Conexant technology in which the encoder
looks at the characteristics of the video content on a pixel-by-pixel basis
and automatically determines the optimal amount of flicker filtering
required. If an end-user wants to work on a spreadsheet while watching a
DVD movie in a window, both the text-intensive application requiring a lot
of flicker filtering, and the DVD movie requiring very little flicker filtering
can look their best.
– Compliant with EIA770-3 and
SMPTE296M (720p), ITU-
R.BT1358 (625p and 525p) and
ITU-R.BT.709-4 (1035i and CIF
30/ PsF and 60/ I) standards
– Automatic trilevel sync and
broad pulse generation
– Direct YPRPB or RGB HDTV
outputs from progressive
RGB or YCrCb graphics video
in 1080i, 720p, 480p ATSC and
ITU-R.BT.1358 625p and 525p
– Support for Japan D1 (525i),
D2 (D1+525p), D3 (D2+750p),
D4 (D3+1125i) HDTV formats
The CX25898/9 also provides an analog RGB or YPRPB HDTV output. The Software and register compatible
CX25898/9 is compliant with the EIA770-3 and SMPTE 274M/293M/296M
with the CX25870/1/2/3/4/5
standards and supports all major ATSC HDTV resolutions including 480p, Worldwide standard-definition
625p (576p), 720p, and 1080i.
TV support: NTSC-M, J, 4.43,
All worldwide standard definition composite outputs are supported,
including NTSC-M (N. America, Taiwan), NTSC-J (Japan), NTSC 4.43, PAL-
PAL-B, D, G, H, I, M, N, Nc, 60,
B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N (Uruguay, Paraguay), PAL-
Nc (Argentina), PAL-60 (China) and SECAM. For enhanced TV viewing, S-
video (SVHS) can be transmitted as well. The CX25898 and CX25899 are
Adaptive flicker filtering for
enhanced image quality (patents
pending), and peaking filters for
functionally identical, except the CX25899 can output standard definition
video with Macrovision® Level 7.1.L1 copy protection capability, and HDTV
compensation from 0% to 25%
with Macrovision 525p (480p) copy protection for progressive scan outputs. Programmable power
Functional Block Diagram
Wide-Screen Signaling (WSS)
and CGMS support for variable
– Adheres to EIAJ CPR-1204
and 1204-1, 1204-2, and
EN300 294 standards
3.3 V operation with scalable
low-voltage graphics controller
ColorstreamTM (EIA 770.2) and
Super ColorstreamTM component
Component YCR CB analog
Luma and chroma comb filtering
(Continued on next page)
Conexant Proprietary and Confidential