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

Image Number 19 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
Analogue-to-digital converter
Packaging sleeve
Method and apparatus for an active low power mode of a portable computing device
Method of bonding metallic members, and metallic bonded body
Method and system for reciprocal mixing cancellation of wideband modulated blockers
Adaptive switch mode LED system
Method and apparatus for soft information transfer between constituent processor circuits in a soft-value processing apparatus
  Randomly Featured Patents
Hierarchical watermarking of content that is distributed via a network
Azolylnitriles, and fungicides containing these compounds
Electric linear motion actuator and electric brake assembly
Die for electroforming a part
Matched precipitation rate rotor-type sprinkler with selectable nozzle ports
Process for the continuous melt thermoforming of polymers
Flame-resistant molding compositions
Liquid filter with chip detecting means
Apparatus and method for mounting microelectronic devices on a mirrored board assembly
Multiple hold-down clamp