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Method for determining type of digital versatile disc

一种多功能、光碟的技术，应用在分辨DVD-与DVD+光碟片领域，能够解决位置信息品质变差、易误判等问题，达到提高正确判断率的效果

Active Publication Date: 2008-02-06
TIAN HLDG LLC
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The disadvantage of this method is that the relevant parameters used by DVD+ and DVD- must be able to cover most of the discs, especially the discs that have been burned, the quality of the position information on it will deteriorate, and it is often easy to misjudge

Method used

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  • Method for determining type of digital versatile disc
  • Method for determining type of digital versatile disc
  • Method for determining type of digital versatile disc

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Embodiment Construction

[0045] The key of an embodiment of the present invention is to read the pan-swing signal (including the swing signal and other signals that can be read together) and find out its maximum hold value (peak hold value) and minimum hold value (bottom hold value), Then obtain the peak-to-peak voltage value (peak-to-peakvoltage) of the pan-swing signal (for example, the gap between a maximum continuous value and an adjacent minimum continuous value, and is usually the result after converting analog to digital), And according to the size of the peak-to-peak voltage to distinguish between DVD+ and DVD- (even DVD-ROM). As for the difference between the peak-to-peak voltage values ​​of these two DVDs, please refer to Figure 2 and Figure 3.

[0046] FIG. 2 shows a pan-wobble signal of DVD+, which only includes a wobble signal 201, and a plurality of phase change regions 202 are included in the wobble signal 201. Referring to FIG. The maximum sustained value of the wobble signal 201 is m...

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Abstract

A method for determining the type of a digital versatile disc (DVD) so that a DVD+ can be distinguished from a DVD-. The main steps for determining the type of a DVD include setting up related parameters, reading a general wobble signal or a wobble signal within the general wobble signal from a DVD to obtain a peak hold value and a trough hold value. The peak and trough hold values of the general wobble signal are read to derive a peak-to-peak voltage. Finally, if the peak-to-peak voltage is greater than a predetermined threshold value, the DVD is classified as a DVD-, otherwise it is classified as a DVD+.

Description

technical field [0001] The present invention relates to a method for judging the type of a digital versatile disc, and in particular to a method for distinguishing DVD- and DVD+ discs. Background technique [0002] Digital versatile discs (digital versatile discs, referred to as DVDs), which are very popular nowadays, except for DVD-ROMs that can only be used to read data (the following "ROM" stands for read-only memory, that is, read only memory) In addition, there are also types of data that can be burned. The DVDs that can be used for burning data are divided into two types: DVD- and DVD+ due to different specifications. At present, most of the DVD players are compatible with different specifications, so it is an important technology to determine the type of optical disc inserted by the user. [0003] The current method is to use the position information contained in the pre-groove wobble signal (hereinafter referred to as the wobble signal) to determine the type of DVD...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B19/12
CPCG11B19/12
Inventor 张肇峰卢志春
Owner TIAN HLDG LLC
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