Information recording device, information recording method, information recording program, and recording medium

Abstract

In an information recording device and method, user data are recorded in a recording medium having two or more recording layers and having a data area in which user data is recordable for each recording layer. A closing command is received after recording of user data in the data area of the recording medium is performed in response to a user-data write request. A minimum amount of lead-out data are written to the recording medium following an end position of the recorded user data in the data area of the recording medium, based on the received closing command.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a U.S. continuation application filed under 35 USC 111(a) claiming benefit under 35 USC 120 and 365(c) of International Application No. PCT / JP2004 / 003916, filed on Mar. 23, 2004, which claims benefit of priority from Japanese patent application No. 2003-083360, filed on Mar. 25, 2003, and Japanese patent application No. 2003-357396, filed on Oct. 17, 2003. The entire contents of the foregoing three applications are hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an information recording device and method which records user data in a recording medium having two or more recording layers each of which has a data area capable of recording information, such as a dual-layer DVD-R. Moreover, the present invention relates to a computer program product embodied therein for causing the computer to execute the information recording method whic...

AI Technical Summary

Benefits of technology

[0020] An object of the present invention is to provide an improved information recording device and method in which the above-described problems are eliminated.

[0021] Another object of the present invention is to provide an information recording device and method which can maintain reproduction compatibility with a predetermined read-only type optical recording medium by avoiding having a non-recorded region left in the data areas of a dual-layer optical disk after recording of user data in the dual-layer optical disk is completed in the middle of the data area of one recording layer.

[0022] Another object of the present invention is to provide a computer program product embodied therein for causing a computer to execute an information processing method which can maintain reproduction compatibility with a predetermined read-only type optical recording medium by avoiding having a non-recorded region left in the data areas of a dual-layer optical disk after recording of user data in the dual-layer optical disk is completed in the middle of the data area of one recording layer.

[0027] According to the present invention, the lead-out data are written to the dual-layer optical disk following the end position of the recorded user data in the data areas thereof even when recording of the user data in the dual-layer optical disk is completed in the middle of the data area of one recording layer. Therefore, it is possible to maintain reproduction compatibility with a predetermined read-only type optical disk having two or more recording layers.

[0028] Moreover, the minimum amount of lead-out data are recorded in the duel-layer optical disk, and it is not necessary to write the lead-out data to all the non-recorded regions. Therefore, the time needed to complete the user data recording and the removal of the optical disk can be shortened.

Problems solved by technology

Consequently, the difficulty of the reproduction of the data of the first layer may arise.

If recording of user data is completed in the middle of the data area of the second layer, the non-recorded region is left in the data area of the second layer, which will cause the dual-layer DVD+R disk to lose reproduction compatibility with the read-only type DVD because of the non-recorded region left in the data area of the second layer.

Moreover, if the focused laser beam is directed to the second layer by chance during the seeking of the target address when reproducing the user data from the first layer, the address information cannot be acquired from the second layer.

In such a case, the problem that the user data of the first layer cannot be read arise.

The same problem may arise when the recording of the user data is completed in the middle of the data area of the first layer without recording any of the user data in the second layer.

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