公开(公告)号：WO2016120619A1

公开(公告)日：2016-08-04

申请号：PCT/GB2016/050177

申请日：2016-01-27

Applicant: BRITISH BROADCASTING CORPORATION

Inventor： POOLE, Chris ,  EARNSHAW, Nigel

IPC: H04N21/835 ,  H04N21/2389 ,  H04N21/2362 ,  H04N21/236 ,  H04N21/6334 ,  H04N21/434 ,  H04N21/442 ,  H04N21/443

CPC classification number: H04N21/835 ,  H04N21/23614 ,  H04N21/2362 ,  H04N21/23892 ,  H04N21/4345 ,  H04N21/4348 ,  H04N21/44236 ,  H04N21/4433 ,  H04N21/63345

Abstract: An encoder for encoding an MPEG transport stream of MPEG sections comprises means for processing the MPEG sections using a hash function to provide multiple hash outputs each hash output being associated with one or more MPEG sections. The hash outputs and corresponding section identifying information are signed using a private key corresponding to a public key available at receivers to produce signatures. The hash output section identifying information and signatures are then coded into one or more MPEG sections themselves which are designated as signature MPEG sections. The signature MPEG sections and MPEG transport stream are broadcast together. A receiver is able to verify using the signature MPEG sections that the MPEG transport stream has been provided by a known source and has not been tampered with.

Abstract translation: 用于编码MPEG部分的MPEG传输流的编码器包括用于使用散列函数处理MPEG部分以提供多个散列输出的装置，每个散列输出与一个或多个MPEG部分相关联。 哈希输出和相应的部分识别信息使用与在接收机可用的公共密钥相对应的私钥来签名以产生签名。 然后，哈希输出部分识别信息和签名被编码成被指定为签名MPEG部分的一个或多个MPEG部分本身。 签名MPEG部分和MPEG传输流一起广播。 接收机能够使用签名MPEG部分验证MPEG传输流已经由已知来源提供并且未被篡改。