Resources Contact Us Home
Method of evaluating a readout signal, and optical disc apparatus

Image Number 17 for United States Patent #8121226.

A method and optical disc apparatus for evaluating a quality of a read signal adapted to the PRML method by evaluating a binary code decoded from the read signal obtained by a head, in which an error bit sequence having one bit edge shift from the binary code is generated, a Euclidian distance is calculated on both a correct bit sequence and the error bit sequence with respect to a predetermined target signal level, assuming that the binary code is the correct bit sequence, a Euclidian distance difference between the Euclidian distance on the correct bit sequence and the Euclidian distance on the error bit sequence is calculated, an average Euclidian distance from the target signal level is calculated, a normalized sequence error is calculated, the binary code is evaluated using the normalized sequence error.

  Recently Added Patents
Uplink interference mitigation method and apparatus
Dihydronaphthyridinyl(organo)methanone analogs as positive allosteric mGluR5 modulators
Multiplexing channels by a medium access controller
Playback device for stereoscopic viewing, integrated circuit, and program
Magnetic circuit and speaker using same
Silicone hydrogel, lens for eye and contact lens
  Randomly Featured Patents
High efficiency water heater
Device for temporarily closing a canal in a body, in particular for assisting the function of the heart by application of counter-pressure
Low profile pump with first and second rotor arrangement
Wire rope salvaging apparatus
Active and adaptive damping devices for shock and noise suppression
Coating material
Phenolic resins for reinforced composites
Method and apparatus for determining the density and structural integrity of biological tissues, medical implants and structural parts
Circuit configuration for generating even-numbered duty factors
Flexible door seal device