Encoding method and apparatus for recording data with an identification code and an error check code
AssigneeSony Corporation
InventorsMasato Tanaka, Takuji Himeno, Yoichiro Sako
Life of this patent
Estimating the term…
Abstract
For recording digital data on a recording medium, an identification code for indicating that the digital data is a series of recording data and an error check code for error checking of digital data forming a block are added for each block of the data. The identification code is inherently contained in the error code to suppress an increase of redundancy.
Claims18
An encoding method employing an identification code and a first error check code for sequentially recording block data, with plural words, having the identification code and the error check code, onto a recording medium for every occurrence of a predetermined number of words, comprising the steps of:
- forming the error check code from said predetermined number of words for checking an error;
- performing a predetermined operation for combining the error check code and said identification code to form a modified error check code;
- and
- adding the modified error check code in which said identification code is contained inherently through said predetermined operation to a block containing said predetermined number of words.
An encoding method employing an identification code and an error check code for sequentially recording block data, with plural words, having the identification code and the error check code, onto a recording medium for every occurrence of a predetermined number of words, comprising the steps of:
- forming the error check code having a bit number larger than that of the identification code, from said predetermined number of words for checking an error;
- performing a predetermined operation for combining said identification code and the same bits of the error check code as the identification code to form a modified error check code;
- and
- adding the modified error check code in which said identification code is contained inherently through said predetermined operation to a block containing said predetermined number of words.
An encoding method employing an identification code and an error check code for sequentially recording block data having the identification code and the error check code onto a recording medium for every occurrence of a predetermined number of words, comprising the steps of:
- forming the error check code having a bit number larger than that of the identification code, from said predetermined number of words for checking an error;
- developing a modified identification code from this identification code;
- performing a predetermined operation with the identification code, the modified identification code and said error check code to form a modified error check code;
- and
- adding the modified error check code obtained by said predetermined operation to a block containing said predetermined number of words.
An encoder for encoding an identification code and a first error check code in sequentially recording block data having said codes on a recording medium for every occurrence of a predetermined number of words, comprising:
- means for forming the error check code, from said predetermined number of words for checking of an error;
- means for performing a predetermined operation employing the error check code and the identification code;
- and
- means for adding the error check code with the identification code contained therein by said predetermined operation to a sequence containing the predetermined number of words and for outputting said sequence.
An encoder for encoding an identification code and an error check code in sequentially recording block data having said codes on a recording medium for every occurrence of a predetermined number of words, comprising:
- means for forming the error check code, from said predetermined number of words, for checking of an error;
- means for developing a modified identification code;
- means for performing a predetermined operation employing the identification code, the modified identification code and the error check code;
- and
- means for adding the error check code obtained by said predetermined operation to a sequence containing the predetermined number of words and for outputting said sequence.
Dependencies are inferred from the claim text.