Patent ID: 7174088
Filing Date: 2007-02-06
Classification: H04N

Abstract:
1. A digital signal recording method of recording a digital signal included in a digital packet input via a digital interface, comprising: providing a packet information area for storing said digital signal and a packet header area for storing additional information of said packet information area to said digital packet; storing first information indicative of copy restriction of said digital signal and second information for setting necessity of protection by encryption of said packet information area in said packet information area; storing third information indicative of status of encryption of said packet information area in said packet header; and determining fourth information indicative of copy restriction of a digital signal to be recorded to a recording medium on a basis of combination of said first, second and third information and recording said fourth information in said recording medium, when a digital signal has been input via said digital interface, wherein said fourth information is set so as to indicate “once copy is enabled” under conditions that said first information is indicative of “copy is enabled without restriction of copy times”, and said second information being indicative of “protection is necessary”, and said third information is indicative of “once copy is enabled”.