Invention Grant
US09003558B1 Allowing degraded play of protected content using scalable codecs when key/license is not obtained
有权
当没有获得密钥/许可证时,允许使用可扩展编解码器来保护受保护内容的播放
- Patent Title: Allowing degraded play of protected content using scalable codecs when key/license is not obtained
- Patent Title (中): 当没有获得密钥/许可证时,允许使用可扩展编解码器来保护受保护内容的播放
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Application No.: US13553630Application Date: 2012-07-19
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Publication No.: US09003558B1Publication Date: 2015-04-07
- Inventor: David Kimbal Dorwin , Aaron James Colwell , Andrew Martin Scherkus , Francis Galligan
- Applicant: David Kimbal Dorwin , Aaron James Colwell , Andrew Martin Scherkus , Francis Galligan
- Applicant Address: US CA Mountain View
- Assignee: Google Inc.
- Current Assignee: Google Inc.
- Current Assignee Address: US CA Mountain View
- Agency: Byrne Poh LLP
- Main IPC: H04L29/06
- IPC: H04L29/06

Abstract:
Embodiments are directed towards enabling a portion of a protected content stream to be played in a degraded quality or experience at a client device when a key and/or license for some other portion of the content stream is unobtainable, or is not obtained by the client device. A content stream has a plurality of layers, with a baseline layer having a lowest quality level of the plurality of layers that is unencrypted, while at least one other layer is encrypted. When the key to decrypt the encrypted layer(s) is unobtained, at least the baseline unencrypted layer is allowed to still play at the client device.
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