公开(公告)号：WO2014205450A2

公开(公告)日：2014-12-24

申请号：PCT/US2014043728

申请日：2014-06-23

Applicant: GEN INSTRUMENT CORP

Inventor： MORONEY PAUL ,  MANGALORE GEETHA ,  FRANKS WILLIAM P

IPC: H04N21/845

CPC classification number: H04N21/64715 ,  H04L9/0861 ,  H04L63/00 ,  H04L63/061 ,  H04L63/123 ,  H04L65/1026 ,  H04L65/608 ,  H04L65/80 ,  H04L69/16 ,  H04L2209/20 ,  H04L2209/60 ,  H04N7/1675 ,  H04N7/17318 ,  H04N21/23439 ,  H04N21/2351 ,  H04N21/2381 ,  H04N21/26258 ,  H04N21/26613 ,  H04N21/4126 ,  H04N21/4181 ,  H04N21/433 ,  H04N21/435 ,  H04N21/4363 ,  H04N21/440218 ,  H04N21/4408 ,  H04N21/47217 ,  H04N21/4825 ,  H04N21/6118 ,  H04N21/6131 ,  H04N21/64322 ,  H04N21/6587 ,  H04N21/8355 ,  H04N21/8456

Abstract: A method for DTCP to HLS conversion is provided that starts with a standard DTCP Protected Content Packet (PCP) structure. The PCP payload data is chunked at defined chunk boundaries. Each chunk is then appended with a pad to be compatible with HLS. An HLS playlist is then provided using the PCP header with identification of the chunks and a keytag. The chunk is encrypted with a DTCP key calculated by the DTCP standard using: (a) copy control bits; (b) a nonce, and (c) an exchange key ID. Relevant PCP header fields are provided in the keytag for the HLS playlist supporting the transaction that enables calculation of the DTCP content key to enable later decryption of the chunks. The system further provides a revised HLS GET for DLNA to enable trick play seek operations to be performed on the converted HLS.

Abstract translation: 提供了一种以标准DTCP保护内容分组（PCP）结构为起点的DTCP到HLS转换的方法。 PCP有效载荷数据在定义的块边界处分块。 然后每个块都附加一个与HLS兼容的焊盘。 然后使用具有块的标识和密钥标签的PCP头提供HLS播放列表。 使用以下方式由DTCP标准计算的DTCP密钥对该块进行加密：（a）复制控制位; （b）随机数，和（c）交换密钥ID。 在支持该事务的HLS播放列表的密钥标签中提供相关的PCP头字段，该消息能够计算DTCP内容密钥以便稍后解密该块。 该系统进一步提供用于DLNA的经修订的HLS GET，以便在转换的HLS上执行特技播放搜索操作。