Methods for reading watermarks in unknown data types, and DVD drives with such functionality

   
   

To prevent playback of pirated, non-encrypted video, a DVD-based system examines data read from a DVD disk for MPEG-like characteristics. If such attributes are detected, the data is examined for the presence of a video usage-control watermark. The presence of such watermark indicates that the video should be distributed only in encrypted form, so playback of video from the disk is prevented.

Para impedir o playback do vídeo pirateado, non-encrypted, um sistema DVD-baseado examina dados lido de um disco de DVD para MPEG-COMO características. Se tais atributos forem detectados, os dados estão examinados para a presença de um watermark video do uso-controle. A presença de tal watermark indica que o vídeo deve ser distribuído somente no formulário cifrado, assim que o playback do vídeo do disco é impedido.

 
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