Overview: .. CX25870/871
Video Encoder with Adaptive Flicker Filtering and HDTV Output
Conexant’s CX25870/871 is specifically designed to meet TV out system requirements for the next-generation desktop PCs, notebook PCs, game consoles and set-top boxes. With pin and software-forward patibility to the Bt868/869, manufacturers can quickly bring to market new solutions that support adaptive flicker filtering, ATSC High-Definition Television (HDTV) output, and 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. The amount of flicker filtering and overscan pensation is entirely flexible. The CX25870/871 also provides a 3-wire analog RGB or YPRPB HDTV output. While the encoder is in HDTV output mode, the device will automatically insert horizontal tri-level synchronization pulses and vertical synchronization broad pulses. The CX25870/871 is pliant with the EIA770-3, SMPTE 274M/293M/296M standards and supports ATSC HDTV resolutions including 480p, 720p, and 1080i. All worldwide standard definition outputs are supported, including NTSC-M (N. America, Taiwan), NTSC-J (Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N (Uruguay, Paraguay), PAL-Nc (Argentina), PAL-60 (China) and SECAM. The CX25870 and CX25871 are functionally identical, except the CX25871 can output standard definition video with Macrovision Level 7.1.L1 copy protection capability.
