Tian Holdings, LLC

Wen-Jeng Chang

Kun-Long Lin

An encoding method for recording gap regions or sectors having repeated data is disclosed. At least one sector is entirely encoded and stored in a memory buffer of the optical recording system. If the currently encoded are gap regions or sector having repeated data embedded in the fields of user data, only those portions affected by the modified header will be encoded to derive associated P code and Q code. The error detection code is firstly generated in the mode 1 standard when a gap region is encoded. P code is then encoded for those regions affected by the sequentially modified header and error detection code, while associated Q code is then derived according the modified header, error detection code, and P code. In the mode 2 form 1 and mode form 2 standards, only those regions affected by the sequentially modified header should be re-encoded again. Since the remaining portions employ the same data as the last encoded one in the memory buffer so that the encoding performance would be significantly upgraded whatever encoding standards are employed.

Encoding recording data on optical disks

A method is proposed for utilizing a memory of a de-interleaving unit comprising the steps of determining a size of the memory according to a maximal symbol number of a data frame, a delay value, an adjustable parameter, and a half of a total symbol number of the data frame; accessing the memory according to a write memory address determined by a first algorithm during data buffering; and accessing the memory according to a read memory address determined by a second algorithm during data retrieving. The conventional access method has the drawback of ineffective use of the memory space of the de-interleaving unit, while the proposed method uses only about half the memory space for implementation.

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Yonghe, Taiwan

Wen-Jeng Chang