The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2013
Filed:
Jan. 06, 2009
Tae Joon Park, Gyeonggido, KR;
Tae Joon Park, Gyeonggido, KR;
LG Electronics Inc, Seoul, KR;
Abstract
A copy prevention method and apparatus of a digital magnetic recording/reproducing system performs the copy prevention function by encoding to insert a marker involving copy prevention function information and executing the function and allows a program supplier to realize a desired copy prevention function of various patterns, in which the marker formed by a control word for scrambling audio and video bit straps and copy prevention information for preventing an illegal copy is encrypted by an encoded key to be multiplexed with the audio and video bit strips scrambled by the control word. The marker transmitted is detected from the bit strips to be decrypted and analyzed by the encoded key to determine whether the copy is permitted or not, so that the detected marker is updated to be recorded on a video tape and the control word is produced from the marker to perform the descrambling to supply the result to a monitor to be displayed. Thus, the program supplier selects the copy prevention function, and a separate format converting apparatus is not required since a field defined within a GA format is utilized while an existing DVCR is not need to be changed for performing the copy prevention function as the data amount to be recorded is not increased.A method and apparatus for recording digital data are discussed. According to an embodiment, the invention is directed to a method of recording digital data using a data recording/reproducing apparatus, the data recording/reproducing apparatus including a scrambler, the method comprising: scrambling, by the scrambler, at least one data units included in the digital data based on control data, the control data being used for controlling a parameter of a scrambling/descrambling operation, wherein one or more succeeding data units included in the digital data are scrambled based on the same control data; and recording, by the data recording/reproducing apparatus, the at least one scrambled data unit and the control data in a portable data storage.
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