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Recording medium and recording/replaying device thereof

A technology of playback and recording layer, which is applied in the direction of recording/reproducing by optical method, optical record carrier, digital recording/reproducing, etc., can solve the problems of not improving CD, large size, high price, etc., and achieve the effect of simple structure

Inactive Publication Date: 2003-08-20
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increase of the overall circuit leads to a complicated, large-sized and expensive circuit structure of the playback device
Therefore, it is not an appropriate method to improve CD sound quality problems

Method used

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  • Recording medium and recording/replaying device thereof
  • Recording medium and recording/replaying device thereof
  • Recording medium and recording/replaying device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Embodiments of the recording medium of the present invention will be described in detail below with reference to FIGS. 1-6.

[0027] The recording medium described in this embodiment is a recording medium for realizing higher sound quality than the first-generation CD having a sampling frequency of fs=44.1 kHz and 16 quantization bits. More specifically, the sampling frequency of the present invention is 64 times that of the first generation CD, namely 2.8224MHz. The first-generation sampling frequency of 44.1kHz is called fs, and the sampling frequency of 2.8224MHz is called 64fs below. A 1-bit ΔΣ modulated digital audio signal with a sampling frequency of 64 fs was used as the digital audio signal for recording. This new CD recording medium is hereinafter referred to as a second generation CD.

[0028] Compared with the data capacity and data transmission speed in the traditional PCM modulation signal, the 1-bit ΔΣ modulation signal can have extremely high frequency...

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Abstract

A recording apparatus for reproducing digital aural signal recording on a recording layer having a plurality of codes with many digital aural signals, including: a light probe having one digital aural signal selected from the said layers to reproduce; a plurality of decode devices, each decodes one digital aural signal; a digit-analog transform device for receiving output of a plurality of decode devices and outputing analog signals; and a select device for controlling the probe reproduce one signal selected from many digital aural signals and connecting the selected signal to one decode device, thereby the digit-analog transform device output analog signals corresponding to the selected digital aural signal.

Description

[0001] This application is a divisional application with the application number 96113204.3. The application date of the parent application is August 9, 1996, the priority is JP95-222749, and the prior application date is August 9, 1995. technical field [0002] BACKGROUND OF THE INVENTION Field of the Invention The present invention relates generally to a recording medium for recording audio data in a new data format, and more particularly to a dual-layer recording medium. Background technique [0003] As recording media with high audio quality, compact discs (CD's) are currently very popular, which generally have a diameter of about 12 cm, on which digital audio data having a sampling frequency fs equal to 44.1 kHz and 16-bit quantization are recorded. [0004] With the advancement of the audio industry and the need for higher capacity and higher transmission speeds of various recording media, higher sound quality is required for CD discs, hereinafter referred to as first-ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/12G11B7/00G11B7/004G11B7/0045G11B7/005G11B7/007G11B7/013G11B7/20G11B19/12G11B19/26G11B20/10G11B23/00G11B23/36
CPCG11B7/0045G11B23/36G11B20/10527G11B19/26G11B23/0021G11B7/005G11B19/12G11B7/24G11B7/013
Inventor 小仓康弘西尾文孝
Owner SONY CORP
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