CX25840/1/2/3 is a broadcast audio/video decoder family of ICs from Conexant. According to Conexant, its a "... second generation of Audio/Video (A/V) decoders built on the success of the CX23880 family ...". Typically used in combination with other PCI bridge/MPEG encoder chip like CX23415/6/8.
CX2584x chips are fully supported by Linux kernel using the cx25840 driver.
All chips of CX2584x family have the same video decoding capabilities.
- Autodetection and decoding of NTSC (M, J, 4.43), PAL (B, D, G, H, I, M, N, Nc), SECAM (K, L), PAL-60
- Five-line adaptive comb filter for NTSC and PAL.
- Two 10 bit ADCs
- Eight composite inputs
- Four Y/C inputs
- VBI data slicing and decoding
Audio decoding capabilities are following:
|A2, NICAM, AM, FM||✘ No||✘ No||✔ Yes||✔ Yes|
|BTSC, EIA-J||✔ Yes||✔ Yes||✘ No||✔ Yes|
|BTSC with DBX||✘ No||✔ Yes||✘ No||✔ Yes|