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Signal correcting device and method

A signal and analog signal technology, applied in the direction of digital signal error detection/correction, digital recording/reproduction, etc., can solve problems such as failure to fall on the ideal target level

Inactive Publication Date: 2005-02-09
TIAN HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a method and device for signal correction, which can overcome the above-mentioned situation where serious offset occurs and cannot fall on the ideal target level

Method used

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Embodiment Construction

[0025] See Figure 4 , which is a functional block diagram of a preferred embodiment of the digital data recording and reading system developed by the present invention, wherein an error control encoder (Error Control Encoder) 11, a regulator (Modulator) 12, a writing device 13, The operating principles of the read head 14, the equalizer 15, the detector 16, the demodulator (Demodulator) 17, and the error control decoder (Error Control Decoder) 18 are the same as those of the prior art, so they will not be described in detail here. Here, the equalizer 15 adjusts the partial response channel into a form of PR(1, 2, 1). The feature of the present invention is mainly that the present invention is provided with a signal correction device 30 between the equalizer 15 and the detector 16, and it receives an analog signal output by the output end of the equalizer 15 (in the optical disc system, it is a radio frequency signal (RF signal). Signal)), and the analog signal contains a plu...

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Abstract

The signal correcting device and method is applied to the output of partially responding channel. The correcting device includes four delayers connected serially and successively to the channel output; one first comparator connected to the output of the first three delayer; one second comparator connected to the channel output and the output of the fourth delayer; and one correcting circuit connected to the output of the second delayer. The correcting method includes the steps of: receiving from the channel output one analog signal including several sample points of sample period T; determining one group of 3T sample points from the sample points based on some judgement standard; and correcting the value in the central sample point of the 3T sample points as one of the first or the fourth position in the partially corrected responding target.

Description

technical field [0001] The present invention relates to a signal correction device and method, in particular to a signal correction device and method applied to an output end of a part of the response channel. Background technique [0002] See figure 1 , which is a functional block diagram of a digital data recording and readout system, where u represents a digital data sequence, and the digital data sequence u is encoded by an Error Control Encoder (ErrorControl Encoder) 11, and then passed through a regulator (Modulator) ) 12 to generate a recording signal x suitable for writing into a digital data recording medium, and write it into a digital data recording medium 10 through a writing device 13, and pass the read head 14 to the The signal recorded on the digital data recording medium is taken out, then adjusted to signal y by the equalizer 15, and then processed by the detector 16 to restore the read signal x' with the same format as the write signal x, and the read sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/10G11B20/18
Inventor 马清文
Owner TIAN HLDG LLC