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US 6,618,552 B1Granted
Method for processing audio and video DVD data
AssigneeOak Technology, Inc.
InventorGene Sonu
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AssigneeOak Technology, Inc.
InventorGene Sonu
Estimating the term…
A method for processing a digitized analog signal read from a DVD media and provided to a digital processing system is described herein. The method includes the steps of forming a first set of data from actual data read from a location on a DVD media, the location containing a known test data sequence, forming a second set of data comprising the known data bits making up the known test data sequence. The method proceeds with the steps of comparing the first set of data to the second set of data; and determining the magnitude of no more than two variables, the two variables representing at least three coefficients in an impulse response relationship which models the digital processing system, the magnitude of the no more than two variables being determined so that the error rate between the first and said second sets of data is minimized.
A method for processing a digitized analog signal read from a DVD media and provided to a digital processing system, the method comprising the steps of:
A computer-readable medium recording software, the software disposed on a computer to perform a method for routing signal lines in an integrated circuit design, the method comprising the steps of:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Digital recording or reproducing: improvement or modification of read or write signals
Information storage based on relative movement between record carrier and transducer
Term ended 29 Dec 2018 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to electronic systems employing CD-ROM or DVD readers as read-only storage devices. More particularly, the present invention relates to a method and apparatus for reducing or eliminating read errors from such storage devices.
2. The Background Art
FIG. 1 is a block diagram of one embodiment of the present invention.
FIG. 2A is a state diagram showing the possible transitions from one state to another. FIG. 2B describes a single state transition according to the schema of FIG. 2A.
FIG. 3A is a trellis diagram representing the possible transitions from one state to another according to the embodiment of FIG. 1.
Those of ordinary skill in the art will realize that the following description of the present invention is illustrative only and not in any way limiting. Other embodiments of the invention will readily suggest themselves to such skilled persons.
FIG. 1 is a block diagram of one embodiment of the present invention.
Referring to FIG. 1, decoder 10 comprises a preprocessor 12, and a signal processor 14. Preprocessor 12 comprises a signal input 16, and two variable “b” representing variables “a” and “b” which are coefficients in the impulse response relationship to be disclosed herein. The actual values of the “a” and “b” coefficients are determined by comparing an actual incoming data sequence to the known ideal data sequence, and then setting variables “a” and “b” to values which would minimize the error rate of the output of the decoder as described herein.