Abstract:
The invention discloses an error-correcting apparatus for decoding an input signal by using a Viterbi algorithm to generate a Viterbi-decoded signal, including an erasure unit and a decoder. The erasure unit is configured to generate at least one logic signal according to at least one path metric difference of path metrics in the Viterbi algorithm, and generate erasure information, wherein the erasure information indicates data reliability of at least one location of the Viterbi-decoded signal. The decoder is configured to decode the Viterbi-decoded signal according to the erasure information.
Abstract:
A method for tuning a plurality of write strategy parameters of an optical storage device includes detecting a plurality of lengths, each length corresponding to a pit or a land on an optical storage medium accessed by the optical storage device, performing calculations corresponding to a plurality of data set types and generating a plurality of data-to-clock edge deviations respectively corresponding to the data set types, and utilizing the data-to-clock edge deviations for tuning the write strategy parameters corresponding to the data set types respectively.
Abstract:
An optical recording system and method. A radiation source provides a radiation beam writing marks separated by spaces on a rewritable optical disc. A pulse generator generates a recording pulse signal based on a preset data signal to drive the radiation source, wherein the recording pulse signal comprises a cooling pulse, and wherein the preset data signal corresponds to a mark and space of equal length and is recorded onto the rewritable optical disc in terms of a written mark and space. A pulse controller determines a final width for the cooling pulse according to a difference between lengths of the written mark and the written space.
Abstract:
The invention relates to recording on a medium, and in particular, to laser control during recording data on an optical medium. A laser control method for dynamically adjusting laser power during recording data onto an optical disc comprises: recording normal data onto the optical disc according to an initial laser power; stopping recording when a trigger is generated; reading back the recorded normal data and generating a first recording quality index; recording a test pattern at a test pattern starting point according to a selected laser power; reading back the test pattern and generating a second recording quality index; and determining an adaptive laser power to continually record the normal data according to the first recording quality index and the second recording quality index.
Abstract:
A method for determining an optimum write power for writing data to an optical disc is disclosed. The method includes utilizing a plurality of candidate write powers for writing data to the optical disc; measuring at least a writing quality parameter corresponding to each of the candidate write powers, respectively; determining a characteristic curve of the writing quality parameters to the candidate write powers; and determining the optimum write power according to a write power corresponding to a target inflection point of the characteristic curve.
Abstract:
A method for tuning a write strategy parameter of an optical storage device, includes: writing a segment of data according to a plurality of write strategies; reading the data back and detecting a plurality of lengths, each length corresponding to a pit or a land on an optical storage medium accessed by the optical storage device; performing calculations according to the lengths and a plurality of data types to generate a plurality of calculation results, each of the data types corresponding to at least a specific target pit length or at least a specific target land length; and utilizing the calculation results to determine a proper write strategy.
Abstract:
A method for tuning a plurality of write strategy parameters of an optical storage device includes detecting a plurality of lengths, each length corresponding to a pit or a land on an optical storage medium accessed by the optical storage device, performing calculations corresponding to a plurality of data set types and generating a plurality of data-to-clock edge deviations respectively corresponding to the data set types, and utilizing the data-to-clock edge deviations for tuning the write strategy parameters corresponding to the data set types respectively.
Abstract:
A method of determining a write strategy when storing data on an optical disc in an optical storage device includes detecting a characteristic of the optical disc, determining an initial write strategy according to the detected characteristic of the optical disc, adjusting the initial write strategy by performing a write pulse adjustment including adjusting a first edge of a write pulse in the initial write strategy by a first time unit to thereby generate an adjusted write strategy, writing data on the optical disc utilizing the adjusted write strategy, measuring reproduced signal quality values when reading the data from the optical disc, and determining a write strategy according to the reproduced signal quality values.
Abstract:
An optical recording system and method. A radiation source provides a radiation beam writing marks separated by spaces on a rewritable optical disc. A pulse generator generates a recording pulse signal based on a preset data signal to drive the radiation source, wherein the recording pulse signal comprises a cooling pulse, and wherein the preset data signal corresponds to a mark and space of equal length and is recorded onto the rewritable optical disc in terms of a written mark and space. A pulse controller determines a final width for the cooling pulse according to a difference between lengths of the written mark and the written space.
Abstract:
A method, for tuning a plurality of write strategy parameters of an optical storage device, includes: detecting a plurality of lengths, each length corresponding to a pit or a land on an optical storage medium accessed by the optical storage device; performing calculations according to the lengths and a plurality of data set types to generate a plurality of calculation results respectively corresponding to the data set types, each of the data set types corresponding to a combination of at least a specific target pit length and a specific target land length or a combination of at least a specific target land length and a specific target pit length, the combination corresponding to a specific write strategy parameter; and utilizing the calculation results for tuning the write strategy parameters corresponding to the data set types, respectively.