Newport Beach, Calif. Conexant Systems announced the availability of two OpenCable-compliant cable set-top box (STB) reference designs for high-definition (HD) personal video recording (PVR) applications. The reference designs are based on the recently announced CX2445X DOCSIS 2.0+ and EuroDOCSIS 2.0+ cable modem integrated circuits, and can be configured with either the CX24500 single-channel or CX2427X dual-channel HD MPEG-2/H.264/VC-1 video decoder. The integrated solutions also include core software and drivers which enable developers to develop middleware and innovative applications for next-generation cable STBs.
The reference designs include support for OpenCable applications platform (OCAP), a middleware software layer specification, enabling manufacturers to develop products which will run on any cable television system in North America, independent of the STB receiver hardware or operating system software. An embedded processor enables advanced hardware security features, and supports major industry security standards including downloadable conditional access system (DCAS) and multi-stream CableCARD (M-Card). The reference designs also support major operating systems such as Linux.
The CX2445X family of DOCSIS 2.0+ front-end cable STB chips feature three demodulators with downstream channel bonding capability, which increases bandwidth capacity. An integrated out-of-band cable physical layer (PHY)is also included, which provides compatibility with legacy U.S. cable systems, and supports Society of Cable Telecommunications Engineers (SCTE) standards 55-1 and 55-2.
The reference designs are offered with either the CX24500 single-channel video decoder for mass market STB devices with PVR capabilities, or the CX2427X dual-channel device, which is capable of decoding two HDTV programs simultaneously for picture-in-picture display, and supporting networked PVR for whole-house video solutions. Both of the decoders support key video compression standards including MPEG-2, MPEG-4 advanced video coding (AVC)/H.264, and VC-1. The CX2427X and CX24500 are based on an ARM 1176 processor and include double data rate memory (DDR2) interface with unified memory, an integrated level two (L2) cache, an advanced graphics rendering engine and Jazelle Java hardware accelerator for improved Java performance and reduced memory foot print.
The video decoders feature three USB ports, audio digital-to-analog converters (DACs), multiple video outputs including HD multimedia interface (HDMI) 1.3 with high-bandwidth digital content protection (HDCP) 1.2, a Broadcast Television Systems Committee (BTSC) stereo encoder and channel 3/4 RF modulator and two Ethernet media access controllers (MACs) with a media independent interface (MII). This enables future expansion for networking technologies including MoCA, HomePlug A/V, or 802.11 wireless networking. The reference designs also have a serial advanced technology attachment (SATA) interface which facilitates the transfer of data to and from hard disks for PVR applications.
Data Sheet: CX2445X
Conexant Systems, 888-855-4562, www.conexant.com