公开(公告)号：US20090257588A1

公开(公告)日：2009-10-15

申请号：US12420947

申请日：2009-04-09

申请人： Yasushi AYAKI ,  Takuya Nishimura ,  Kazunari Fujiwara

发明人： Yasushi AYAKI ,  Takuya Nishimura ,  Kazunari Fujiwara

IPC分类号： H04N7/167 ,  H04L9/06

CPC分类号： H04N7/1675 ,  H04L9/0844 ,  H04N21/4367

摘要： An AV data transmission apparatus having two or more output channels, the apparatus comprising: an encryption unit which encrypts AV data using an encryption key; an AV data transmission unit which transmits the encryption key and the encrypted AV data to AV data reception apparatuses from each output channel; an encryption key switching unit which switches an encryption key generation scheme to another one for the encryption key transmitted through a selected output channel; an output suspension unit which suspends output of the encrypted AV data transmitted through a selected output channel; and a control unit which causes (i) the output suspension unit to select an output channel and suspend the output of the encrypted AV data through the selected output channel, and then causes (ii) the encryption key switching unit to select the same output channel and switch the encryption key generation scheme to another one for the output channel.

摘要翻译： 一种具有两个或多个输出通道的AV数据传输装置，所述装置包括：加密单元，其使用加密密钥对AV数据进行加密; AV数据发送单元，其从每个输出通道向AV数据接收装置发送加密密钥和加密的AV数据; 加密密钥切换单元，其将加密密钥生成方案切换到另一个加密密钥生成方案，用于通过选择的输出信道发送的加密密钥; 输出悬挂单元，其暂停通过所选输出通道发送的加密AV数据的输出; 以及控制单元，其使得（i）输出停止单元选择输出通道并通过所选择的输出通道暂停加密的AV数据的输出，然后使（ii）加密密钥切换单元选择相同的输出通道 并将加密密钥生成方案切换到另一个用于输出通道。