SOLID STATE DRIVE AND JOINT ENCODING/DECODING METHOD THEREOF
First Claim
1. A joint encoding/decoding method for a solid state drive, the joint encoding/decoding method comprising steps of:
- implementing a data-writing process for encoding a user data by a hard codec and a soft codec respectively, thereby generating a first number of parity bits and a second number of parity bits;
writing the user data, the first number of parity bits and the second number of parity bits into a flash memory module; and
implementing a data-reading process for decoding the user data by the hard codec according to the first number of parity bits, wherein if the user data is successfully decoded, the user data is outputted, wherein if the user data is unsuccessfully decoded, the joint encoding/decoding method further comprises a step of decoding the user data by the soft codec according to the second number of parity bits.
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Abstract
A joint encoding/decoding method for a solid state drive is provided. Firstly, a data-writing process is implemented for encoding a user data by a hard codec and a soft codec respectively, thereby generating a first number of parity bits and a second number of parity bits. Then, the user data, the first number of parity bits and the second number of parity bits are written into a flash memory module. Then, a data-reading process is implemented for decoding the user data by the hard codec according to the first number of parity bits. If the user data is successfully decoded, the user data is outputted. If the user data is unsuccessfully decoded, a step of decoding the user data by the soft codec according to the second number of parity bits is performed.
29 Citations
17 Claims
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1. A joint encoding/decoding method for a solid state drive, the joint encoding/decoding method comprising steps of:
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implementing a data-writing process for encoding a user data by a hard codec and a soft codec respectively, thereby generating a first number of parity bits and a second number of parity bits; writing the user data, the first number of parity bits and the second number of parity bits into a flash memory module; and implementing a data-reading process for decoding the user data by the hard codec according to the first number of parity bits, wherein if the user data is successfully decoded, the user data is outputted, wherein if the user data is unsuccessfully decoded, the joint encoding/decoding method further comprises a step of decoding the user data by the soft codec according to the second number of parity bits. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A joint encoding/decoding method for a solid state drive, the joint encoding/decoding method comprising steps of:
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implementing a data-writing process for encoding a user data by a hard codec and a soft codec respectively, thereby generating a first number of parity bits and a second number of parity bits; writing the user data, the first number of parity bits and the second number of parity bits into a flash memory module; and implementing a data-reading process for decoding the user data by the soft codec according to the second number of parity bits, wherein if the user data is successfully decoded, the user data is outputted, wherein if the user data is unsuccessfully decoded, the joint encoding/decoding method further comprises a step of decoding the user data by the hard codec according to the first number of parity bits. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A solid state drive, comprising:
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plural flash memory modules; and a memory controller connected with the plural flash memory modules, and comprising plural hard codecs correspond to the plural flash memory modules and a soft codec, wherein a user data is encoded by one of the hard codecs and the soft codec of the memory controller to generate a first number of parity bits and a second number of parity bits respectively, wherein the user data, the first number of parity bits and the second number of parity bits are written into a corresponding one of the plural flash memory modules, wherein during a data-reading process, the memory controller selectively uses the corresponding hard codec to decode the user data according to the first number of parity bits and/or uses the soft codec to decode the user data according to the second number of parity bits. - View Dependent Claims (14, 15)
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16. A joint encoding/decoding method for a solid state drive, the joint encoding/decoding method comprising steps of:
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implementing a data-writing process for encoding a user data by a first encoding method and a second encoding respectively, thereby generating a first number of parity bits and a second number of parity bits; writing the user data, the first number of parity bits and the second number of parity bits into a flash memory module; and implementing a data-reading process for decoding the user data according to the first number of parity bits, wherein if the user data is successfully decoded, the user data is outputted, wherein if the user data is unsuccessfully decoded, the joint encoding/decoding method further comprises a step of decoding the user data according to the second number of parity bits. - View Dependent Claims (17)
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Specification