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:
Sep. 12, 1995
Filed:
Apr. 19, 1993
Gustavus L Van Eijck, Eindhoven, NL;
Gerardus C Lokhoff, Eindhoven, NL;
Franciscus A Kneepkens, Eindhoven, NL;
John F Sherry, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
Systems, apparatus and methods for recording or reproducing from a re-recordable record carrier digital signals, representing a digital audio signal, containing information which results in concealment of a portion of a replica of the digital audio signal during its reproduction to prohibit audio distortions resulting from a boundary between two digital signals, wherein one of those digital signal is newly-recorded over a previously-recorded other digital signal. The concealment information can also be included in auxiliary signals recorded on reproduced from the record carrier along with the digital signals. In a recording apparatus, a digital signal including audio information (i.e., data-reduced samples of sub-band signals derived from sub-band coding a digital audio signal, and bit allocation information and scale factor information relating to the quantized samples) is provided with, via a signal processing unit, mutilated information or a concealment code (possibly included in an auxiliary signal instead) indicating that a portion of the replica of the digital audio signal is to be concealed during its reproduction, and then, recorded on a re-recordable record carrier. The reproducing apparatus acts, via a concealment control signal and a concealment unit, as a result of the mutilated information or the concealment code included in a digital signal (or auxiliary signal) read or received from a re-recordable record carrier, to conceal a portion of the replica of the digital audio signal during its reproduction. In embodiments in which concealment codes are used, a detector is included in the reproducing apparatus to detect the concealment code.