Recording method and recording/reproduction apparatus therefor

A technology of a recording device and a reproducing device, applied in the directions of optical recording/reproduction, digital recording/reproduction, magnetic recording, etc., can solve the problems of not improving CD, large size, high price, etc., and achieve the effect of simple structure

Inactive Publication Date: 2003-08-06
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 method and recording/reproduction apparatus therefor
  • Recording method and recording/reproduction apparatus therefor
  • Recording method and recording/reproduction apparatus therefor

Examples

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Embodiment Construction

[0022] Embodiments of the recording medium of the present invention will be described in detail below with reference to FIGS. 1-6.

[0023] 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.

[0024] 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 medium which realizes high sound quality and is playable on a conventional playback device has a recording layer provided with a double-layered structure having at least a first layer L1 and a second layer L2, an audio data program is recorded on the first layer in the first data format, which is the conventional format, and the audio data program is recorded on the second layer in a second, new data format. The audio data programs recorded on the first layer and on the second layer are the same program and can be produced using 1-bit DELTASIGMA modulation having a high sampling rate as the new format, the DELTA SIGMA modulated signal being passed through successive decimation filters to form the lower sampling rate signal of the conventional format. The double-layered disk can be played back using a disk judging unit that detects the disk's table of contents and controls a laser beam focus of a pick up, an operating clock frequency, and the decoder for reading out the data recorded in pits formed on the disk.

Description

technical field [0001] 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 [0002] As a recording medium with high audio quality, a compact disc (CD) is very popular at present, which generally has a diameter of about 12 cm, and digital audio data having a sampling frequency fs equal to 44.1 kHz and 16-bit quantization are recorded thereon. [0003] 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-generation CDs, and in order to realize such high sound quality, The first method to consider is to increase the sampling frequency. [0004] More specifically, the sampling frequency fs=44.1kHz of the first-generation CD limits the fr...

Claims

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Application Information

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Patent Type & Authority Patents(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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