METHOD AND DEVICE FOR REPRODUCING DATA

专利名称：METHOD AND DEVICE FOR REPRODUCING

DATA

发明人：IWAMURA, Ryuichi,MASUDA, Shozo Sony

Corporation,AKIYAMA, Yoshiyuki

申请号：EP94927795.8申请日：19940928公开号：EP0671738A1公开日：19950913

专利附图：

摘要：Data are recorded on an optical disk (1) by adding double parities of internaland external parities to the data. The internal parity is added to interleaved data and

used for the correction of internal codes, and the external parity is added to non-interleaved data and the internal parity and used for the correction of the external codes.Reproduced data from the disk (1) are supplied to and stored in a ring buffer memory (5)and, at the same time, supplied to an error correction circuit (71) which corrects theerrors in the external codes. The correction results are supplied to the memory (5) andoverwritten therein. The data stored in the memory (5) are again read out to the circuit(71) and the errors in the internal codes are corrected. For sector address detection by asector detection circuit (72), the data of which the errors of the external codes arecorrected are used. In special reproduction, only the external code correction isperformed.

申请人：SONY CORPORATION

地址：7-35 Kitashinagawa 6-chome Shinagawa-ku Tokyo 141 JP

国籍：JP

代理机构：Cotter, Ivan John

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