H.264 video I/O companion ICs for automotive MOST & ADAS

February 10, 2015 // By Graham Prophet
Microchip has announced devices it positions as the first H.264 video I/O companion ICs optimised for the Media Oriented Systems Transport (MOST) high-speed automotive infotainment and Advanced Driver Assistance Systems (ADAS) network technology.

The OS85621 and OS85623 devices expand Microchip’s existing family of MOST I/O companions with a cost-effective video codec solution.

Featuring a low-latency, high-quality H.264 codec and an on-chip Digital Transmission Content Protection (DTCP) coprocessor, the OS85621 enables automotive designers to implement a comprehensive content-protected video transmission solution “within days”. Video streams with restricted access from devices—such as DIDs, digital media drives and TV tuners—can now be transmitted as encrypted H.264 over a MOST network, satisfying today’s market demand for high-quality audio and video within the automotive environment.

The OS85621’s on-chip DTCP coprocessor supports hardware acceleration of the computation-intensive operations required for DTCP authentication and content protection. Up to eight independent data streams can be simultaneously routed through the DTCP coprocessor’s cipher engine for M6 or AES-128 encryption/decryption.

The ultra-low-latency mode of the H.264 codec enables single-digit millisecond latency from video input to video output, including encoding, transmission over a MOST network and decoding. This real-time, high-speed video processing makes the OS85623 (which has no DTCP coprocessor) suitable for camera-based ADAS applications that are designed to enhance vehicle safety.

Both devices feature a number of hardware interfaces commonly used for infotainment data exchange. Their video-interface port supports a variety of industry-standard formats and resolutions, including HD for seamless interfacing to video sources. A streaming port supports legacy audio formats and 7.1 multi-channel audio up to 24 bits. Two independent, inter-chip-communication Media Local Bus (MediaLB) ports provide a seamless interface to Microchip’s Intelligent Network Interface Controllers (INICs) for MOST networks, as well as application processors. These video I/O companion chips also feature an additional Transport Stream Interface for compressed video streams.

Microchip also offers its free and ready-to-use DTCP-Stack for I/O Companions. An optional OS85621 MOST ToGo reference design assists the creation of automotive ADAS and infotainment systems, enabling designers to focus on application software development.

In a BGA 196 package, volume pricing starts at $8.00.

Microchip; www.microchip.com/OS85621-Page-020315a