Variable parameter self-adaptive PRML (Partial Response Maximum Likelihood) data sink and data processing method thereof

Abstract

The invention relates to a variable parameter self-adaptive PRML (Partial Response Maximum Likelihood) data sink for a high density optical disk storage system on the basis of freedom clock sampling and a data processing method thereof. The data sink comprises a free clock sampling module, a variable parameter self-adaptive signal conditioning module, a clock recovering module, a self-adaptive maximum likelihood coding module and a target response selecting module; according to the invention, by adopting a variable parameter self-adaptive signal conditioning technology, a digital interpolating clock recovering technology and a PRML (Partial Response Maximum Likelihood) principle-based maximum likelihood coding technology, high speed data transmission requirements when high-density storage data is read out can be met, meanwhile the intersymbol interference can be well eliminated, and the error rate is reduced.

Description

technical field [0001] The invention relates to high-density optical storage, in particular to a variable parameter adaptive partial response maximum likelihood (Partial-Response and Maximum-Likelihood, referred to as PRML) data receiver based on free clock sampling for high-density optical disk storage systems and The data processing method thereof is hereinafter referred to as variable parameter adaptive PRML data receiver and data processing method thereof. Background technique [0002] The development history of optical storage technology is relatively short. The earliest optical disc was the compact disc (CD) that appeared in the early 1970s. In the field of optical storage, people have been advancing along the road of large-capacity storage. Now a single-sided single-layer Blu-ray disc can store more than 25G bytes of data. In the optical disc system, according to the linear system model proposed by Bergmans, the light intensity function of the focused light spot of t...

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Problems solved by technology

Although such a data receiving system can be well applied to low-density optical storage, it cannot meet the requirements of high-density optical storage with high data transmission rate and high information storage density. It is necessary to design a data readout system suitable for high-density optical storage. system

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