Optical recording media

Abstract

The invention relates to a disc which can use the wide range record of land pre-pit disc to improve the address ability, wherein it comprises land pre-pit synchronous bit, relative address bit and user data bit; the first concave of land pre-pit is P1, the second concave is P2, and the third concave is P3, while the lengths of concaves are LP1, LP2, and LP3; the distance between land pre-pit and magnetic track is Tp meets that 2Tp>=LP1>LP2>=LP3.

Description

【Technical field】 [0001] This invention relates to optical recording media, and more particularly to optical discs using land pre-pit signals addressed together with DVD-R / RW in wide range. 【Background technique】 [0002] Generally, pits will be formed according to recording / or formation and reproduction of certain track information in optical discs that can record, remove, and reproduce information, such as DVD-RAM and DVD-RW. This dimple is formed during the manufacture of the stamper used to manufacture the substrate. [0003] In addition, the control of the spindle servo (servo) operation in the recordable optical disc and the clock (clock) for data recording / reproduction must include address information in the optical disc structure. [0004] But the biggest difference between DVD-RAM and DVD-RW is in the recording area. [0005] That is, DVD-RAM is recorded in the pit area and the land area, and the area where the address (address) of each unit exists in order to fin...

AI Technical Summary

Problems solved by technology

[0008] Next, in the case of DVD-R / RW which uses land pre-pit addressing with uniform amplitude and jitter of one cycle number, the recording range gradually increases. There are many problems when recording with a wide range of DCD like CD.

[0009] In particular, the level (level) and amplitude (Amplitude) of the land pre-pit signal for addressing after the entire recording and part of the recording vary greatly depending on the recording and reproduction conditions of the wide range of the magnetic disk. Therefore, the address translation after recording The BELRa of code performance will increase, which is a disadvantage

[0010] Then, if the length of the land pre-pit is increased to make up for this shortcoming, it will be greatly interfered by a particularly small signal (3T signal). In addition, if the amplitude of the land pre-pit is increased, the RF signal will be distorted.

At this time, the above-mentioned distorted signal will not only cause uneven signal waveform but also cause parity A error and degradation of signal jitter characteristics, which are the most important signal characteristics.

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