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Decoder and decoding method for optical driver

The technology of a decoding device and a decoding method, which is applied in the field of data decoding devices, can solve problems such as digital data string errors, signal nonlinear distortion, and RF signal asymmetry

Inactive Publication Date: 2007-06-20
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In an optical storage system, such as a known optical drive (such as a VCD drive or a DVD+ / -R drive), when reading data stored on an optical disc, the data is decoded from a known RF signal, but due to the system Due to the interference of itself or the operating environment (such as the drift of the optical read head, electronic noise interference, etc.), the RF signal will appear asymmetrical, which will cause nonlinear distortion of the demodulated signal, and further cause the decoded digital data string to occur. error

Method used

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  • Decoder and decoding method for optical driver
  • Decoder and decoding method for optical driver
  • Decoder and decoding method for optical driver

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Embodiment Construction

[0014] Please refer to FIG. 1 , which is a schematic diagram of a first embodiment of a decoding device 95 applied to an optical drive 10 according to the present invention. The optical drive 10 includes an optical pickup head (pick-up head) 15, a pre-stage equalizer 20, an analog-to-digital converter (ADC) 30, a sampling rate converter 40, an equalizer (equalizer) 60, an equalizer control circuit 50, The sampling rate control circuit 70 and the decoding device 95 . As shown in FIG. 1 , the decoding device 95 is composed of a level slicer 80 and a Viterbi detector 90 . First, the optical pick-up head 15 utilizes the laser beam to read the data recorded on the optical disc and converts the reflected laser beam into an analog signal (that is, the RF signal described in the prior art), and the analog signal is amplified by the preamplifier 20 It is input to the analog-to-digital converter 30 and converted into a digital signal. Since the sampling rate (sampling rate) and the ch...

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Abstract

A decoding device used on optical-driving consists of staged cutter for setting multiple adjustable boundary line to divide out multiple signal region and for outputting a group of state values according to signal region corresponded by input value, Witt ratio detector being connected to staged cutter and being used to decode out transmission data according to said group of state values.

Description

technical field [0001] The present invention provides a data decoding device and method, especially a decoding device and a decoding device that uses a Viterbi detector and adjusts the signal interval boundaries of a level slicer to correct nonlinear effects. decoding method. Background technique [0002] In an optical storage system, such as a known optical drive (such as a VCD drive or a DVD+ / -R drive), when reading data stored on an optical disc, the data is decoded from a known RF signal, but due to the system Due to the interference of itself or the operating environment (such as the drift of the optical read head, electronic noise interference, etc.), the RF signal will appear asymmetrical, which will cause nonlinear distortion of the demodulated signal, and further cause the decoded digital data string to occur. error. The known decoding operation uses a Viterbi detector (Viterbi detector) to decode the data, as disclosed in US Patent No. 6,754,160, which uses a DC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B20/18G11B7/00
Inventor 何维鸿
Owner REALTEK SEMICON CORP