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Optical disk replaying machine and method

A technology of a player, an optical disc, applied in the direction of recording/reproducing by optical methods, recording of information on a magnetic disc, digital recording/reproducing, etc., can solve the problems of influence, large amount of power, harmful sound quality, etc.

Inactive Publication Date: 2007-11-07
SONY CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Disc players consume a relatively large amount of power as a whole, and the operation of circuits dedicated to another type of disc can cause the disc player to malfunction and adversely affect any content being played in the disc player. The noise of the circuit in the operation of the disc
[0023] Especially in CD / HD players designed for high-fidelity audio playback, clock oscillations in circuits dedicated to the type of disc that is not currently being played in the player can have a detrimental effect on the sound quality of playback

Method used

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  • Optical disk replaying machine and method
  • Optical disk replaying machine and method
  • Optical disk replaying machine and method

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Embodiment Construction

[0045] The invention is further described below in terms of disc players suitable for both types of discs. The compact disc player is adapted to selectively read compact discs (CDs; hereinafter referred to as "CD discs" for ease of illustration and explanation) and high density recording discs and / or have CDs recorded on their first layer. signal, and an HD signal is recorded on its second layer.

[0046] Here, the CD refers to an optical disc having a first audio signal of 16 quantization bits sampled at a sampling frequency of 44.1 KHz recorded therein.

[0047] On the other hand, here, a high density (HD) recording optical disc refers to an optical disc having a second digital audio signal of 1 quantization bit (hereinafter referred to as "HD signal") sampled at a sampling frequency of 64*44.1 KHz.

[0048] Referring now to FIG. 1, there is schematically illustrated in block diagram form an embodiment of an optical disc player according to the present invention suitable fo...

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Abstract

A disc player for selectively reading multi-bit digital signal obtained by sampling with a sampling signal Fs and one-bit digital signal obtained by sampling with a sampling signal nxFs (n is an integer larger than 2), is adapted to control, when one of the digital signals is selected for reading, a signal processing circuit for the other digital signal to stand in a power saving mode, thereby permitting a long time of playing.

Description

technical field [0001] The present invention relates to an optical disc player suitable for selectively reading first and second layers formed in an optical disc, said first layer having multi-bit digital signals recorded therein obtained by sampling with a sampling signal Fs, And the second layer has a unit digital signal recorded therein obtained by sampling with a sampling signal n×Fs (n is an integer greater than 2). [0002] The present invention also relates to an optical disc player adapted to selectively read first and second type optical discs having a multi-bit digital signal recorded therein obtained by sampling with a sampling signal Fs, and the The second type of optical disc has unit digital signals recorded therein obtained by sampling with a sampling signal n×Fs (n is an integer greater than 2). Background technique [0003] Optical disc players for playing back optical discs, typically compact discs (CDs; for ease of illustration and explanation, hereinafte...

Claims

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Application Information

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IPC IPC(8): G11B19/12G11B19/00G11B7/005G11B19/02G11B20/10
CPCG11B7/005G11B19/02G11B20/10
Inventor 关井康彰
Owner SONY CORP
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