Patent ID: 9066082
Filing Date: 2015-06-23
Classification: G11B,H04L,H04N

Abstract:
1. A method, comprising: receiving a set of multi-channel media content comprising a plurality of content frames, wherein each content frame in the plurality of content frames comprises a first channel content frame and second channel content frame; grouping each of the first channel content frames in the plurality of content frames into a first group of content frames; grouping each of the second channel content frames in the plurality of content frames into a second group of content frames, where the second group of content frames is separate from the first group of content frames; encoding each content frame in the first group of content frames, wherein each of a set of content frames in the first group of content frames that has been encoded comprises at least one variation, wherein each of the variations is a different version of a given section of the multi-channel media content; encoding each content frame in the second group of content frames, wherein the second group of content frames that has been encoded is absent any content frames comprising a variation; encrypting each of the set of content frames with a separate and different encryption key that is also separate and different from an encryption key used to encrypt content frames in the first group of content frames that are absent a variation, the encrypting configuring each of the set of content frames to be decoded by a multi-key decoder of a playback device; and encrypting each content frame in the second group of content frames with an encryption key used to encrypt the content frames in the first group of content frames that are absent a variation, the encrypting configuring each content frame in the second group of content frames to be decoded by a single-key decoder of the playback device.