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:
Aug. 25, 2009
Filed:
Mar. 11, 1999
Naoki Ejima, Hirakata, JP;
Naoki Ejima, Hirakata, JP;
Panasonic Corporation, , JP;
Abstract
A sub-scrambling/descrambling method and device enhances the degree of scrambling of linear PCM data. Data is delimited at predetermined times, and the minimum value of a run is found and used as annex information. The run part is replaced with an arbitrary irreversible random data string, which is processed by a main scrambling device to generate transmission data. After main descrambling of the transmission data, a descrambling device takes out the annex Information and replaces the random data string with a predetermined '0' or '1' run according to the annex information. Thus, the degree of scrambling of linear PCM data is enhanced as much or more than compressed video data.