公开(公告)号：US20160295283A1

公开(公告)日：2016-10-06

申请号：US14677762

申请日：2015-04-02

Applicant: QUALCOMM Incorporated

Inventor： Roberto AVANZI ,  Simo Petteri KANGASLAMPI ,  Ron KEIDAR ,  Chang-Kuk CHOI

IPC: H04N21/4627 ,  H04N21/439

CPC classification number: H04N21/4627 ,  G06F21/10 ,  G06F2221/07 ,  H04L2209/603 ,  H04N21/4394 ,  H04N21/4398

Abstract: Techniques for preventing circumvention of digital rights management protections on electronic content are provided. A method according to these techniques includes receiving a content stream, obtaining samples from the content stream, generating a histogram based on the samples from the content stream, classifying the content stream as including audio content or non-audio content based on the histogram, and modifying portions of the content stream responsive to classifying the content stream as including non-audio content. The content stream can be modified such that any video content included in the content stream would be rendered unplayable, while audio content included in the content stream remains playable.

Abstract translation: 提供了防止数字版权管理保护电子内容的技术。 根据这些技术的方法包括接收内容流，从内容流获得样本，基于来自内容流的样本生成直方图，基于直方图将内容流分类为包括音频内容或非音频内容;以及 响应于将内容流分类为包括非音频内容来修改内容流的部分。 可以修改内容流，使得包含在内容流中的任何视频内容将被渲染为不可播放，而包含在内容流中的音频内容保持可播放。