MEDIA DECODING CONTROL WITH HARDWARE-PROTECTED DIGITAL RIGHTS MANAGEMENT

摘要

Innovations in the field of hardware protected digital rights management (DRM) systems are presented. For example, a hardware protected DRM system includes a trusted layer and an untrusted layer. In an untrusted layer, the control module receives source media data including encrypted media data. The control module processes metadata about the media data. Maybe the metadata exposed by the module in the trusted layer is not opaque within the untrusted hierarchy. In the trusted layer, using the key data, the module decrypts the encrypted media data, which may be encrypted media data from the source media data or its transcripted version. A module in the trusted layer decodes the decrypted media data. The host decoder in the untrusted layer may be configured to manage at least some aspects of decoding, rendering and / or display in the trusted layer without exposing the decrypted media data or key data within the untrusted layer Use metadata.