Method and apparatus of modulating/demodulating data for an optical recording medium
AssigneeLG Electronics Inc.
InventorSeong Ahn
Life of this patent
Estimating the term…
Abstract
A method of modulating a source data to a code data under condition of a given code rate and run length limited (rll). The method including (a) inputting the source data, and (b) modulating the source data into code data by converting source data of 2 bits into code data of 3 bits under a condition of a given code rate. Further, the modulating step (b) further includes converting source data of 4 bits into code data of 6 bits, source data of 6 bits into code data of 9 bits, and source data of 8 bits into code data of 12 bits, based on a bit sequence of the source data.
Claims32
A method of modulating a source data to a code data under condition of a given code rate and run length limited (rll), said method comprising:
- (a) inputting the source data;
- and
- (b) modulating the source data into code data by converting source data of 2 bits into code data of 3 bits under a condition of a given code rate,
- wherein the modulating step (b) further includes converting source data of 4 bits into code data of 6 bits, source data of 6 bits into code data of 9 bits, and source data of 8 bits into code data of 12 bits, based on a bit sequence of the source data.
A method of modulating a source data to a code data under conditions of a given code rate and run length limited (rll), said method comprising:
- (a) modulating the source data into the code data by converting source data of 2 bits into code data of 3 bits under the condition of the given code rate, wherein the modulating step further includes converting source data of 4 bits into code data of 6 bits, source data of 6 bits into code data of 9 bits, and source data of 8 bits into code data of 12 bits, based on a bit sequence of the source data;
- (b) converting the modulated data into NRZI data to produce channel data;
- and
- (c) recording the channel data onto a recording medium.
A method of demodulating a code data written onto a recording medium, comprising:
- (a) reading the code data from the recording medium, the coded data having been modulated from a source data based on at least a bit sequence of the source data;
- and
- (b) demodulating the read code data by converting code data of 3 bits into source data of 2 bits, code data of 6 bits into source data of 4 bits, code data of 9 bits into source data of 6 bits, and code data of 12 bits into source data of 8 bits based on at least the bit sequence of the read code data.
A recording medium including a code data modulated from a source data under conditions of a given code rate and run length limited (rll), wherein the source data is modulated into the code data by converting source data of 2 bits into code data of 3 bits, source data of 4 bits into code data of 6 bits, source data of 6 bits into code data of 9 bits, and source data of 8 bits into code data of 12 bits, based on a bit sequence of the source data.
Dependencies are inferred from the claim text.