Patent ID: 7783039
Filing Date: 2010-08-24
Classification: G11B,H04N

Abstract:
1. A digital recording apparatus comprising: a data control circuit which receives a digital recording signal; a memory which is capable of communicating information with the data control circuit; an encryption circuit which is capable of communicating information with the data control circuit, the encryption circuit encrypting the digital recording signal, the encryption circuit being deactivated before the data control circuit receives the digital recording signal to be encrypted; a recording unit which is controlled by the data control circuit, the recording unit recording the digital recording signal on a recording medium; and a recording signal processing circuit which causes the data control circuit to control transmission of the digital recording signal; wherein when the digital recording signal needs to be encrypted, the encryption circuit begins to start up and the digital recording signal is transmitted from the data control circuit to the memory to be stored in the memory during start-up of the encryption circuit, and when the encryption circuit becomes capable of operation, the digital recording signal stored in the memory is transmitted via the data control circuit to the encryption circuit and is encrypted by the encryption circuit to be recorded in the recording unit, and when the digital recording signal needs to be encrypted, the memory secures a vacant capacity larger than a capacity capable of storing the digital recording signal from a time when the digital recording signal needs to be encrypted to a time when the encryption circuit becomes capable of operation.