摘要:
A recording method for modulating data and recording the modulated data on a recording medium. When recording data on a recording medium, according to the type of data recorded on the recording medium, switching is performed between selection methods for selecting conversion tables stored in a storage block for converting m-bit data into n-bit data (m
摘要:
An optical recording medium having plural recording layers which are layered together. The optical recording medium includes at least a first recording layer on which first data is to be recorded and a second recording layer on which second data is to be recorded. The first and second recording layers are layered together, with the second data being recorded at a location in the second recording layer in the vicinity of a location in the first recording layer where the first data relevant to the second data is recorded. Replay signals of variable configurations can be obtained by suitably synthesizing data read out from the respective recording layers.
摘要:
When data recording on a disk is interrupted due to the termination of data reception and recording is then resumed with reception of new data, specific data generated by a data generator (23) is added to the last block of the data received immediately before recording interruption and to the first block of the data received immediately after release of recording interruption to secure the interleave length of the aforementioned last and first blocks, respectively. Thus, the data in the last block of the received data is modulated into recording data and is recorded on the disk before recording interruption. Disk recording is resumed with recording data obtained by modulating data of the first block of the newly received data so that new recording data can be recorded so as to be continuous to the terminal end of the data already recorded on the disk without employing any link blocks.
摘要:
A recording medium includes an area for recording data which has been subjected to error correction/coding by a first error correction code. In this area, data of a format decodable by a second error correction code which is different from the first error correction code is mixed/recorded. The data of the format decodable by the second error correction code constitutes at least a part of encryption key data.
摘要:
In an error detection method of the present invention, as shown in figure 1, target code strings which are inputted in a discontinuous arrangement are subjected to a syndrome operation, and simultaneously, the target code strings which are inputted in a discontinuous arranged are subjected to a first error detection code operation while correcting the inter-data continuity by skipping the data so that the arrangement of the code strings have continuity. Then, error data positions and error data numerical values of the target code strings are calculated on the basis of a syndrome obtained in the syndrome operation, and only the error data position among the target code strings are subjected to a second error detection code operation again on the basis of the error data positions and the error data numerical values. Using the operation result, the operation result by the first error detection code operation is updated, thereby simultaneously performing ECC processing and EDC processing for the target code strings which are inputted in a discontinuous arrangement.
摘要:
A method for recording data comprising: forming recording data by adding a pattern of connection bits selected from among a plurality of patterns of connection bits to the end of an m-bit data symbol, the selected pattern of connection bits causing an increase in an accumulated value of direct-current components per unit time when the n-bit data symbol is a special data symbol and is added to a data symbol other than the special data symbol, when m-bit data is converted into the n-bit data symbol (m
摘要翻译:一种用于记录数据的方法,包括:通过将从连续位的多个模式中选择的连接位的模式添加到m位数据符号的结尾来形成记录数据,所选择的连接位模式导致累积的 当n位数据符号是特殊数据符号时,每单位时间的直流分量的值被加到特殊数据符号以外的数据符号,当m位数据被转换成n位数据符号时 m
摘要:
A recording medium having an area in which data that has been encoded with a first error correction code is recorded, wherein data that can be decoded with a second error correction code that is different from the first error correction code is recorded to the area along with the data that has been encoded with the first error correction code, and wherein the data that can be decoded with the second error correction code composes at least part of encryption key data.
摘要:
An optical recording medium with recording layers laminated is provided. The optical recording medium includes at least a first recording layer where first data is recorded and a second recording layer where second data associated with the first data is recorded. The first and second recording layers are laid one over another, and the second data is recorded at a location on the second recording layer, the location being in the neighborhood of the location on the first recording layer where the first data associated with the second data is recorded. Signals can be reproduced in various forms by properly combining data read from the recording layers.
摘要:
A codeword (102) for use in error correction of digital optical media, the codeword (102) having a plurality of data symbols and a plurality of parity symbols (PA1, PA2, PB3, PB4), and includes an augmented channel word (DAB) which can be read as either a first value (DA) or a second alternate value (DB). The augmented channel word is one of the plurality of data and parity symbols, wherein the augmented channel word retains its value irrespective of any error correction performed.