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Optical record device reading channel frequency by using dither signal detection and playing method thereof

A technology of jittering the signal and channel frequency, which is applied in the recording/reproducing, data recording, recording signal processing and other directions by optical methods, and can solve the problem of taking a considerable amount of time.

Inactive Publication Date: 2007-07-04
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] This, for the frequency detection of traditional RF signals, takes considerable time

Method used

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  • Optical record device reading channel frequency by using dither signal detection and playing method thereof
  • Optical record device reading channel frequency by using dither signal detection and playing method thereof
  • Optical record device reading channel frequency by using dither signal detection and playing method thereof

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Embodiment Construction

[0038] Embodiments of the optical recording device and its playback method using jitter signal detection and reading channel frequency of the present invention will be described in detail below with reference to the accompanying drawings. The components in the following figures are required to be attached with reference symbols. Even if the same components are identified in different figures, the same symbols can be used, and the well-known functions and structures will not be described in detail here.

[0039] Fig. 3 is a block diagram of an optical recording device for detecting a channel frequency using a dither signal according to an embodiment of the present invention.

[0040] In the embodiment, the optical recording device comprises: an optical pickup 300 , a frequency detection device 30 , a frequency information conversion device 304 , and a phase control device 31 .

[0041] The above-mentioned frequency detection device 30 includes: an analog-to-digital converter (A...

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Abstract

The invention relates to optical record device and method which uses shake signal to detect signal frequency, said device includes: optical pick-up which detects shake signal and radio frequency (RF) signal recorded in the optical record medium; frequency detect device which generates the shake signal and sync signal; frequency information conversion device which calculates the radio frequency analogy wave frequency information using the shake signal and sync signal; phase control device which controls the radio frequency signal phase using the calculated radio frequency analogy wave frequency information. The invention confirms the input frequency bit data input frequency using the shake signal in recording disc such as CD-R,DVD+-R / RW,BD-R / W, the synchronism of channel can be achieved quickly and precisely.

Description

technical field [0001] The invention relates to an optical recording device and a playback method thereof for detecting and reading channel frequency by using a jitter signal, especially for playing CD-R, DVD+-R / RW, BD-R / RW and other recording discs for storing sequential bit data, For the necessary process, that is, the synchronization process corresponding to the radio frequency (RF) analog signal, the method of obtaining the frequency content of the data input to the read channel is obtained by using all existing wobble signals in the recording disc. Background technique [0002] Bit information that is divided into 0 and 1 is recorded on the surface of the optical disc. Because there is a difference in the reflectance of the read laser in the optical pickup, the radio frequency analog waveform corresponding to the form of 0 and 1 is read. The radio frequency analog waveform generated in this way is read in the optical disc playback receiver, and the bit data recorded on ...

Claims

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Application Information

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IPC IPC(8): G11B7/00G11B20/00G11B20/10
Inventor 具健载
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI