HDCP on MOST

The MOST(R) Cooperation – the standardization organization for the leading automotive multimedia network Media Oriented Systems Transport (MOST) – has approved the specification for the High-bandwidth Digital Content Protection (HDCP) Scheme on MOST, which meets the requirements of the HDCP Independent Interface Specification of the Digital Content Protection LLC. This allows a MOST network to move for example HDMI content with the required content protection. The MOST Cooperation has optimized the MOST network for high quality video streaming. MOST150 enables direct isochronous transport of, for example, MPEG video streams without bit-stuffing or transcoding. Now, the MOST standard supports approved content protection schemes for both Digital Transmission Content Protection (DTCP) and HDCP, thus enabling the digital transmission of DVD audio and video, HD-DVD, Blu-ray and HDMI content.

High-bandwidth Digital Content Protection

DTCP is used for the networked distribution of protected content and has been approved for MOST for many years. However, HDCP is used for a more direct point-to-point connection between the output of a data source and a renderer. HDMI requires HDCP protection. Data cannot be extracted from an HDCP system and moved with a different protection scheme. With this new specification, the integration of HDMI applications into vehicles is no longer an issue. In addition to much higher bandwidth, MOST150 offers an isochronous channel to support streams that are not synchronized to the MOST frame rate, so bit-stuffing or transcoding are no longer necessary. As with MOST25 and MOST50, application developers can take advantage of secure pipes for transferring sensitive content. The HDCP scheme in the MOST specification describes the MOST functions and services required to enable an HDCP system interface independent adaptation. To implement HDCP mechanisms, the data to be protected is encrypted, transmitted and decrypted in packetized form.