Abstract:
Apparatus and method for detecting human-visual artifacts in a video presentation. In accordance with some embodiments, a sequence of frames in a video presentation is received. Non-codec based visual artifacts in the video presentation are detected by comparing at least one similarity measurement value for non-immediately successive frames to at least one similarity measurement value for immediately successive frames within the sequence.
Abstract:
Method and apparatus for storing archive images to a substrate, such as a rotatable optical disc. In some embodiments, the substrate stores a plurality of archived images in a human detectable form on a surface of the substrate and further stores control data associated with the archived images to facilitate optical recovery of said human detectable images from the surface.
Abstract:
Apparatus (136) and method (140) for detecting human-visual artifacts in a video presentation. In accordance with some embodiments, a sequence of frames (162, 200) in a video presentation is received. Non-codec based visual artifacts in the video presentation are detected (146) by comparing at least one similarity measurement value (196) for non-immediately successive frames to at least one similarity measurement value for immediately successive frames within the sequence.
Abstract:
In an optical disc mastering process in which a master disc is generated, an apparatus comprising a master driver circuit (300), operably connectable to a signal processing system which generates a modulation signal to modulate a writing beam, comprising: a latch (308) for receiving and temporarily storing successive portions of the modulation signal; and a master oscillator (310), operably coupled to the latch, which generates and supplies a master clock at a selected frequency to the latch to reclock the modulation signal at the selected frequency of the master clock.
Abstract:
A recordable medium (110), an apparatus (170) for forming the medium and a method for using the medium to support media authentication and copy protection efforts. The recordable medium (110) comprises a plurality of concentric tracks arranged to form an addressable data recording area (112). Embedded within the data recording area is a non-recordable zone (recordable medium identification, or RMID zone) is configured to permit an attempted recording operation to record data on the zone, and to prevent successful readback of the data during a subsequent readback operation. An embossment is preferably supplied to the RMID zone such as a metalized layer of pits and lands, optically contrasting marks (120) within the recordable medium, or a layer of dye (116). The embossment interferes with the ability to readback the data that was attempted to be written to the zone.
Abstract:
Method (260) and apparatus (110, 220) for compensating for differences in translation path geometries of transducers (1 12) used to access a data storage medium (100). A compensation profile is generated in relation to radial error between a first translation path geometry (134, 152) of a first transducer and a different, second translation path geometry (144, 154) of a second transducer. A control circuit (116, 170, 200) directs the first transducer to write data to a rotatable data storage medium in relation to the compensation profile to emulate the second translation path geometry. In some embodiments, the control circuit comprises a data signal clock generator ( 172), a motor rotation clock generator ( 174), and a transducer radial translation clock generator (176). A nearest pulse detector (202) identifies a closest clock signal pulse to a once-per-revolution (OPR) rotational reference (182), and the control circuit adjusts a frequency of the associated clock signal coincident with said closest pulse.
Abstract:
An apparatus and method for optimizing the writing of data to an optical disc. An optimization circuit (200) generates an optimized modulation signal which modulates a writing beam of a laser beam recorder (204), the optimized modulation signal comprising a series of data symbols (240) that correspond to resulting pits and lands on the optical disc (130, 140, 150, 160). The optimization circuit individually adjusts leading and trailing edges of the data symbols, as well as amplitudes of the data symbols. The selective placement of pit and land transitions can be used to embed a second set of data on the optical disc to provide watermarks or anti-piracy hidden codes. Electrical jitter errors, including data correlated jitter, can further be minimized through a master driver circuit (300) which can be used to reclock an initial modulation signal prior to generation of the optimized modulation signal by the optimization circuit.