DOUG CARSON & ASSOCIATES, INC.
|DOUG CARSON & ASSOCIATES, INC. Patent applications|
|Patent application number||Title||Published|
|20130141643||Audio-Video Frame Synchronization in a Multimedia Stream - Apparatus and method for synchronizing audio and video frames in a multimedia data stream. In accordance with some embodiments, the multimedia stream is received into a memory to provide a sequence of video frames in a first buffer and a sequence of audio frames in a second buffer. The sequence of video frames is monitored for an occurrence of at least one of a plurality of different types of visual events. The occurrence of a selected visual event is detected that spans multiple successive video frames in the sequence of video frames. A corresponding audio event is detected that spans multiple successive audio frames in the sequence of audio frames. The relative timing between the detected audio and visual events is adjusted to synchronize the associated sequences of video and audio frames.||06-06-2013|
|20110216433||Writing Repeating Patterns of Features to a Substrate - Method and apparatus for writing repeating patterns of features to a substrate, such as a data storage medium. In accordance with some embodiments, a multi-dimensional pattern of discrete features of different sizes to be written to a substrate is divided into a plurality of contiguous regions. A unique set of compensation values is assigned to each region. A write beam of a write system is used to write the features to the substrate responsive to said unique sets of compensation values so that all of the features having a common size in at least one region are written using the same compensation values from the associated set.||09-08-2011|
|20110032633||Deflection Reference Adjustment for Variable Track Pitch Media - Apparatus and method for generating an analog waveform, such as a deflection signal used to deflect a write beam during the writing of data to a rotatable medium having a variable track pitch (TP). In accordance with various embodiments, a first digital to analog converter (DAC) is configured to output a deflection signal having an analog voltage level corresponding to a magnitude of a first multi-bit digital input value applied to the first DAC. A second DAC is configured to supply a rail voltage to the first DAC having an analog voltage level corresponding to a magnitude of a second multi-bit digital input value applied to the second DAC. The deflection signal is used to deflect a write beam supplied by a write beam generator.||02-10-2011|
|20100195469||Media Pre-Write With Track-Aligned Write Beam Deflection and Write Frequency Adjustment - Method and apparatus for formatting a data storage medium, such as a magnetic or optical disc. In accordance with various embodiments, a data storage medium is rotated while a write beam is used to write data to the rotating medium. The data are written in the form of a plurality of concentric data tracks. A deflection angle of the write beam is continuously adjusted in an axial direction along each track. In some embodiments, the axial deflection of the write beam imparts a desired angular offset between a beginning point of a first track and a beginning point of an immediately adjacent second track. This allows a first translation geometry, such as a linear translation path of a linear actuator, to emulate a different second translation geometry, such as a rotary translation path of a rotary actuator.||08-05-2010|
|20100195461||Multi-Session Pre-Recorded Storage Medium - Apparatus characterized as a multi-session data storage medium such as an optical disc, and method for formatting the same. In accordance with various embodiments, a first session is recorded onto the medium with a first set of user data. A second session is subsequently recorded onto the medium with a second set of user data. The second session contactingly abuts the first session without the use of an intervening linking area therebetween. This enhances the data storage capacity of the medium irrespective of the total number of sessions applied thereto. In some embodiments, the first session is described by a first file system and the second session is described by a different, second file system independent of the first file system. The respective file systems may be accessed by different readback systems, such a personal computer (PC) and a gaming system.||08-05-2010|
|20100142087||Variable Track Width Recording Compensation - Method and apparatus for providing a storage medium with variable track widths. In accordance with various embodiments, a data storage medium is rotated by a motor. A write transducer is used to write concentric data tracks to the storage medium during said rotation. The tracks are provided with variable track widths established by selectively changing a rotational velocity of the medium. The variable track widths can be gradual and/or abrupt, depending on the requirements of a given application. Gradual variations in track width can be used by a linear actuator with a linear translation path to emulate tracks written along a pivot translation path of a rotary actuator. Abrupt variations in track width can be used to provide different zones of tracks having different specified track widths. The tracks may be written using an electron beam recorder (EBR) with a constant write beam power level.||06-10-2010|
|20100061004||Compensation for Different Transducer Translation Path Geometries - Method and apparatus for compensating for differences in translation path geometries of transducers used to access a data storage medium. A compensation profile is generated in relation to radial error between a first translation path geometry of a first transducer and a different, second translation path geometry of a second transducer. A control circuit 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, a motor rotation clock generator, and a transducer radial translation clock generator. A nearest pulse detector identifies a closest clock signal pulse to a once-per-revolution (OPR) rotational reference, and the control circuit adjusts a frequency of the associated clock signal coincident with said closest pulse.||03-11-2010|
Patent applications by DOUG CARSON & ASSOCIATES, INC.