Patent ID: 8707021
Filing Date: 2014-04-22
Classification: G11B,H04N

Abstract:
1. A data recording device having a program data recording unit for recording program stream data to be distributed through a network, comprising: a program data collating and appending unit to collate distributed program stream data in response to a later request for recording which one user has made with recorded program stream data already recorded successfully in said program data recording unit in response to an earlier request for recording which another user has made and to append, based on results from the collation, only newly distributed program stream data to said program data recording unit, said later request being independent of said earlier request; and a demand range recording unit to record recording demand range information representing a range of said program stream data that a user makes a request for recording and to record user information to identify said user in a manner to be associated with said record demand range information, said user information which is used, at time of redistribution, for judging as to whether or not said user has an authority to watch/listen to said range of said program stream data, and wherein said program data collating and appending unit reads out sequentially said distributed program stream data by specified amount from a receiving buffer, collates the specified amount of data having been sequentially read out, with said recorded program stream data, and appends only at least one chopped portion in which no recording range is duplicated therebetween, out of said distributed program stream data to said program data recording unit.