CD disc reproducing device

A playback device, optical disc technology, applied in optical recording/reproduction, TV, color TV, etc., can solve the problem of data transmission bit rate change and other issues

Inactive Publication Date: 2003-12-17
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, when all the data transfer bit rates are different from PG#1 to PG#4, although the data transfer bit rate per reprod

Method used

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  • CD disc reproducing device
  • CD disc reproducing device
  • CD disc reproducing device

Examples

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Embodiment Construction

[0034] An embodiment of the present invention will be described below using FIGS. 1 to 8 . Fig. 1 is a block diagram showing the overall structure of an optical disk reproducing apparatus in an embodiment of the present invention. In FIG. 1 , a spindle motor 1 rotates an optical disc 20 , and an optical pickup 2 reads signals recorded on the optical disc 20 . The mechanism controller 3 controls the mechanism including the spindle motor 1 that drives the optical disk 20 and the optical pickup 2 that reads out the signal recorded on the optical disk 20 . Specifically, the mechanism controller 3 controls the actuator of the optical pick-up 2 to move the position of the optical pick-up while controlling the speed of the spindle motor 1 according to the track position information indicated by the system controller 17. When the correct track is found, it moves to record the desired physical sector, and continuously reads the signal from the desired position.

[0035] The signal pr...

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Abstract

The present invention provides an optical disc playback apparatus which realizes the scan search in which the scan search time for performing the scan search of plural programs having different playback data transfer bit rates is proportional to the real playback time of each program. In the scan search for playing back necessary data among audio/video data from an optical disc 20 which is rotated by a spindle motor 1 using an optical pickup 2, a system control unit 17 reads title set management information from a title set management information storage unit 13, and obtains last position data, initial position data and the playback time of each program including the necessary data. The address amount of relative motion per one scan search operation in each program is decided on the basis of a value which is obtained by subtracting the initial position data of the program from the last position data, and dividing the subtraction result by the playback time of the program. These processes are applied similarly to each program.

Description

technical field [0001] The present invention relates to the case when arbitrary playback unit programs are respectively played back using an optical disk which records multimedia data including digital moving image data and digital audio data and has different playback data transfer bit rates between playback unit programs , an optical disc playback device that realizes a scanning search operation at a speed proportional to the playback speed. technical background [0002] In recent years, instead of conventional laser discs and video CDs, DVD (Versatile Disc)-Video, whose recording capacity has been greatly improved, has been popularized, and many movie titles are being released. This DVD-Video standard disc focuses on video playback and standardizes it, but does not pay attention to various audio playback, for example: sampling frequency 192KHz, 24 bits, 2 channels, 74 minutes that can be performed using linear PCM There is no specification for the above playback or playb...

Claims

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Application Information

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IPC IPC(8): G11B7/0037G11B20/12G11B27/00G11B27/10G11B27/32H04N5/85H04N9/804H04N9/806H04N9/82
CPCH04N5/85G11B2020/10592G11B27/329G11B27/105G11B2220/211H04N9/8063G11B7/0037H04N9/8227G11B2220/2583G11B2220/2562H04N9/8042
Inventor 山田二郎
Owner PANASONIC CORP
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