Optical information recording apparatus, optical information recording method, optical information recording/reproducing apparatus and optical information recording/reproducing method

An optical information recording/reproducing apparatus to record/reproduce information using holography, comprising:

• a signal generation unit;
• a pick up;
• and
• a signal processing unit;
• wherein the signal generation unit modulates input data, adds at least one control bit to each group of N bits, performs NRZI-modulation on the modulated data, determines the at least one control bit such that a digital sum value of the NRZI-modulated data falls within a predetermined range, performs NRZI modulation on the data whose at least one control bit was determined, and rearranges the data to generate 2-dimensional data;
• wherein the pickup records the 2-dimensional data generated by the signal generation unit in a hologram disc and reproduce the 2-dimensional data from the hologram disc;
• wherein the signal processing unit corrects image distortions of the 2-dimensional data reproduced by the pickup, performs NRZI-modulation on the 2-dimensional data that has undergone a binarization operation, removes the at least one control bit added during the recording, and demodulates the data according to a modulation rule used during the recording.

An optical information recording method for recording information using holography, comprising the steps of:

• modulating input data;
• adding at least one control bit to each group of N bits;
• determining the at least one control bit such that a digital sum value of the NRZI-modulated data falls within a predetermined range;
• performing NRZI-modulation on the data whose at least one control bit was determined;
• rearranging the data to generate 2-dimensional data;
• and
• recording the generated 2-dimensional data in a hologram disc.

An optical information recording apparatus to record information using holography

• a signal generation unit;
• and
• a pick up;
• wherein the signal generation unit modulates input data, adds at least one control bit to each group of N bits, determines the at least one control bit such that a digital sum value of the modulated data falls within a predetermined range, inverts the data whose at least one control bit was determined according to the at least one control bit, and rearranges the data to generate 2-dimensional data;
• wherein the pickup records the 2-dimensional data generated by the signal generation unit in a hologram disc.

An optical information recording/reproducing apparatus to record/reproduce information using holography, comprising:

• a signal generation unit;
• a pick up;
• and
• a signal processing unit;
• wherein the signal generation unit modulates input data, adds at least one control bit to each group of N bits, determines the at least one control bit such that a digital sum value of the modulated data falls within a predetermined range, inverts the data whose at least one control bit was determined according to the at least one control bit, and rearranges the data to generate 2-dimensional data;
• wherein the pickup records the 2-dimensional data generated by the signal generation unit in a hologram disc and reproduce the 2-dimensional data from the hologram disc;
• wherein the signal processing unit corrects image distortions of the 2-dimensional data reproduced by the pickup, inverts the 2-dimensional data that has undergone a binarization operation according to the at least one control bit, removes the at least one control bit added during the recording, and demodulates the data according to a modulation rule used during the recording.

An optical information recording method for recording information using holography, comprising the steps of:

• modulating input data;
• adding at least one control bit to each group of N bits;
• determining the at least one control bit such that a digital sum value of the modulated data falls within a predetermined range;
• inverting the data whose at least one control bit was determined according to the at least one control bit;
• rearranging the data to generate 2-dimensional data;
• and
• recording the generated 2-dimensional data in a hologram disc.