Recording medium coding method

An encoding method and a technology for recording media, which are applied in the field of data encoding processing, can solve problems such as encoding speed delay, and achieve the effect of improving efficiency

Inactive Publication Date: 2009-03-11
IND TECH RES INST
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  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, the longer the path length of the look-ahead path calculation (that is, the more pre-calculated continuation data words), the better the characteristics of the overall coded digital string, but the corresponding amount of pre-calculated data will also be smaller. The larger the value, the amount of computation usually increases exponentially with the path length of the look-ahead path operation, which will cause the overall encoding speed to become much slower.

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Embodiment Construction

[0026] The invention proposes a recording medium encoding method of an improved look ahead path calculation method. It further improves the overall speed of modulation and encoding of recording media by means of reducing the calculation amount of the look-ahead path.

[0027] In the forward-looking path calculation adopted in the prior art, its calculation amount is as shown in Figure 1, assuming that after the current data word (data word) there are always two candidate code words (code word) to choose from, then when the following When a path length (p+1) forward path operation is performed, four different path combinations will be generated, and when the next two path length (p+2) forward path operations are performed, eight different path combinations will be generated. Calculations of path combinations... By analogy, when performing forward path calculations with p path lengths, at most 2 (p+1) calculations of different path combinations will be generated. The amount of ...

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Abstract

The invention discloses a encoding method of recording media. It is a speedup method to change encoding in recording media. It is according to the preset state and path in the encoding program to simplify the actual operation of the possible path in the look ahead path operation process to achieve the purpose of fastening encoding. Thus, the efficiency would be improved.

Description

technical field [0001] The present invention relates to a method related to data encoding processing, in particular to a modulation encoding applied to recording media, which can simplify the actual calculation amount in the look ahead path calculation process and achieve the speed of encoding method. Background technique [0002] The modulation coding mechanism applied to the recording medium is mainly used to convert the original data word (dataword) into a digital word (code word) through calculation and encoding of a specific rule of coding technology, which can be stored in a regular and relatively small format. It is recorded in the recording medium in the form of space, and then the original data words can be restored for use through certain decoding rules. [0003] In the modulation coding process, since the modulation coding efficiency will directly affect the information capacity that can be stored in the recording medium, high-efficiency modulation coding methods...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M5/14G11B20/14
Inventor 杨永吉刘碧海
Owner IND TECH RES INST
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