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Information reproducing apparatus, information carrier, and information recording apparatus

An information carrier and information reproduction technology, which is applied to the recording of information on the magnetic disk, magnetic recording, information storage, etc., can solve the problems of the average reproduction rate reduction, reduce noise, reduce the average reproduction time, and reduce the average access time Effect

Inactive Publication Date: 2002-06-05
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the above-mentioned technique of switching CLV control and CAV control, when the disc is sequentially read from the inner circle to the outer circle, the switching operation of CLV control and CAV control occurs every time the information type is changed, resulting in a decrease in the average reproduction rate

Method used

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  • Information reproducing apparatus, information carrier, and information recording apparatus
  • Information reproducing apparatus, information carrier, and information recording apparatus
  • Information reproducing apparatus, information carrier, and information recording apparatus

Examples

Experimental program
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Embodiment 1

[0053] An information reproducing apparatus and a reproducing method thereof according to Embodiment 1 of the present invention will be described below. FIG. 1 is a schematic diagram showing the configuration of an information reproducing apparatus according to Embodiment 1. As shown in FIG.

[0054] The optical pickup 3 reads information recorded on the disc 1 . Specifically, the optical pickup 3 accurately focuses a light beam onto a pit or a mark recorded on a track of the disc 1 by using a focusing portion located therein, and reads a signal according to the intensity of the light emitted. The beam is moved to a desired track on the disc 1 by a traverse motor 4 that moves the optical pickup 3 in the radial direction of the disc 1 .

[0055] The light beam is focused on the disc by the control circuit 8 having the following functions, and the pit sequence (track) is correctly scanned with the light beam. The focus error signal and the tracking error signal input from the ...

Embodiment 2

[0071] An information reproducing apparatus and a reproducing method thereof according to another embodiment of the present invention will be described below.

[0072] In Embodiment 1, switching between CLV control and CAV control is performed according to the length of continuous information. In Embodiment 2, conversion is performed according to the type of information (audio / video information or code information). Specifically, it is first determined whether the information is moving image information, and then the moving image information is reproduced. Based on the results, an optimal rendering rate is provided for proper rotation control. It is highly possible to determine whether information to be reproduced is moving image information by identifying additional information on functions and content recorded on a disc other than moving image information.

[0073] The structure of the information reproducing apparatus of Embodiment 2 is basically similar to that shown in ...

Embodiment 3

[0101] An information carrier (disc) according to Embodiment 3 of the present invention will be described below. FIG. 4 is a plan view showing an information carrier of Embodiment 3. FIG.

[0102] As shown in FIG. 4, the information recording carrier of the present invention comprises a plurality of information recording areas (areas 1 and 2) separated in the radial direction of the information carrier. Information is recorded in each of these information recording areas according to the information length of continuous information. Specifically, information with an information length of continuous information larger than a predetermined length, such as audio information and video information, is recorded in area 1 on the inner circle side of the information carrier, and information with Information of the information length of continuous information smaller than a predetermined length, such as a short file (ie, code information). If the information length of the information...

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PUM

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Abstract

An information reproduction apparatus of the present invention comprises a rotating section 2 for rotating an information carrier 1 on which a unit of continuous information capable of being continuously read out is recorded, a CLV control section 9 for controlling the rotating section in such a manner that the information carrier is rotated at a constant linear velocity, a CAV control section 9 for controlling the rotating section in such a manner that the information carrier is rotated at a constant angular velocity, a rotation control selection 14 for selectively operating the CLV or CAV control section, and an information determination section 14 for detecting an information length of the continuous information. The rotation control selection section is constructed in such a manner as to selectively operate the CLV or CAV control section based on a result of the detection of the information length of the continuous information.

Description

technical field [0001] The present invention relates to an information reproducing device for reproducing information recorded on a disc-shaped information carrier, a disc-shaped information carrier, and an information recording device for recording information on the information carrier. Background technique [0002] CD (Compact Disc) and DVD (Digital Versatile Disc) respectively have unified physical format standards, wherein, regardless of whether the information is audio / video information or code information, for CD, the information is recorded at a linear velocity of 1.3m / s to the pre- For DVD, information is recorded into the pre-pit at a linear velocity of 3.49m / s. [0003] For a device (CD player or DVD player) that reproduces audio / video information recorded on a disc at a constant linear velocity, generally, access performance is considered unimportant, and CLV (Constant Linear Velocity) control is performed to ensure Low levels of noise and vibration. In CLV con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B19/12G11B19/28H04N5/781
CPCG11B19/12G11B19/28G11B19/20
Inventor 木村直浩渡边克也石桥広通
Owner PANASONIC CORP
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