摘要:
A holographic storage medium, and a method and an apparatus for recording/reproducing data on/from the holographic storage medium, the method recording data on the holographic storage medium as holograms recorded in datapages, and dividing one of the datapages into a plurality of regions; and recording the data at various sampling rates in the respective regions.
摘要:
A holographic storage medium, and a method and an apparatus for recording/reproducing data on/from the holographic storage medium, the method recording data on the holographic storage medium as holograms recorded in datapages, and dividing one of the datapages into a plurality of regions; and recording the data at various sampling rates in the respective regions.
摘要:
A method of and apparatus for recording/reproducing data on/from a holographic storage medium. The method of recording data on a holographic storage medium in which holograms containing data by interference between a signal light and a reference light are recorded in pages includes modulating additional information including information about a page so as to keep the rate of 0s or 1s in binarized data of the additional information constant and recording the page having the modulated additional information added thereto on the holographic storage medium.
摘要:
A holographic storage medium, and a method and an apparatus for recording/reproducing data on/from the holographic storage medium. The method including: dividing a datapage into a plurality of regions; modulating the data into codewords having different on-pixel rates; and arranging the codewords in the plurality of regions, based on the different on-pixel rates.
摘要:
A holographic storage medium, and a method and an apparatus for recording/reproducing data on/from the holographic storage medium. The method including: dividing a datapage into a plurality of regions; modulating the data into codewords having different on-pixel rates; and arranging the codewords in the plurality of regions, based on the different on-pixel rates.
摘要:
A method for to restore quantization data to binary data in a system for recording and/or reproducing the binary data includes selecting a selection region predicted to include an alignment mark from the quantization data, determining a location of the alignment mark within the selection region; and converting the quantization data to the binary data based on a comparison of the determined location of the alignment mark and an original location of the alignment mark.
摘要:
An apparatus and method to modulate address data of a disc type recording medium, include generating the address data, performing error correction coding of the address data and outputting coded address data, receiving the coded address data in a unit of at least two bits, generating a first modulated signal of the coded address data using a first modulation technique, generating a second modulated signal of the coded address data using a second modulating signal, and generating a unit wobble signal by synthesizing the first and second modulated signals.
摘要:
A disc type recording medium on which information is recorded by forming disc tracks thereon, a method of forming the disc tracks, and a recording medium for recording a program executing the method. In the above media and method, data access can be rendered in data frame units. The disc type recording medium includes a data frame composed of a plurality of sync frames. The total number of the sync frames is determined according to the length of the innermost circumference of the disc type recording medium. Accordingly, recoding the additional information in such a data frame format prevents a reduction in a rate of detecting the additional information even when the recording medium is miniaturized.
摘要:
A data modulation method to suppress a DC component using parity information of a synchronization codeword, and an apparatus for executing the method. Input data is multiplexed according to multiplexing information, the synchronization codeword including the multiplexing information for a multiplexed data stream is inserted, modulation is performed and plural modulated data streams are output, and a respective one of the modulated data streams having a DC component, which is smallest is selected from among the modulated streams. The synchronization codeword has a bit to control the parity of the codeword, and the input data is multiplexed according to whether a parity of the synchronization codeword is even or is odd. Thus, the DC component included in the modulated codeword stream may be more effectively suppressed without a decrease in a code rate.
摘要:
A method and apparatus for recording and/or reproducing holographic data and a holographic information storage medium, wherein the apparatus for recording and/or reproducing holographic information includes an optical pickup emitting light onto a holographic information storage medium and receiving the emitted light. The optical pickup includes: a light source unit emitting a signal beam and a reference beam in a recording mode; and a focusing optical system focusing the signal beam and the reference beam on one focal point in the holographic information storage medium so that information can be recorded by using an interference pattern formed along a depth direction of the holographic information storage medium in the vicinity of the focal point, wherein the numerical aperture of the focusing optical system for the signal beam is different from the numerical aperture of the focusing optical system for the reference beam.