Conexant CX2584x

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.

Overview/Features

Analog video inputs

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

Analog audio inputs

Audio decoding capabilities are following:

Capability	CX25840	CX25841	CX25842	CX25843
A2, NICAM, AM, FM	✘ No	✘ No	✔ Yes	✔ Yes
BTSC, EIA-J	✔ Yes	✔ Yes	✘ No	✔ Yes
BTSC with DBX	✘ No	✔ Yes	✘ No	✔ Yes

External Links

• Conexant Product Page