System and Method for Signaling Segment Encryption and Key Derivation for Adaptive Streaming

摘要

An apparatus for decoding a media stream includes a memory module, a processor module coupled to the memory module, wherein the memory module contains instructions that when executed by the processor cause the apparatus to perform the following: receive a media stream including a segment signaling information and a plurality of segments, wherein the plurality of segments includes encoded and unencoded segments, wherein the segment signaling information includes identification of at least two segment groups each including at least one segment, identify at least one segment group using the segment signaling information in the media stream, identify at least one segment decoding algorithm for the at least one segment group, identify at least one decoding key for the at least segment group, and decode each encoded segment within the at least segment group using the at least segment decoding algorithm and the at least one decoding key.

主权项

1. An apparatus in a media distribution network for decrypting a media stream, wherein the apparatus comprises:
a processor; and a memory coupled to the processor and storing programming; the processor is configured to execute the programming to perform operations of: receiving the media stream distributed by a server in the media distribution network, wherein the media stream comprising a plurality of consecutive groups of segments, each of the consecutive groups being formed according to a common group structure with a predefined total number of segments comprising consecutive unencrypted segments and consecutive encrypted segments; obtaining a manifest file comprising segment signaling information, wherein the segment signaling information indicates a number of groups in the plurality of consecutive groups and a number of the consecutive unencrypted segments in the common group structure; and decrypting the plurality of consecutive groups of segments in the media stream based on the segment signaling information.