Record medium with different latencies

An emulator for a non-original optical or magneto-optical recording medium, wherein the non-original optical or magneto-optical recording medium comprises different memory blocks with corresponding latencies for corresponding positions on the non-original recording medium, and wherein at least one latency of said different memory blocks varies from a corresponding at least one latency of said different memory blocks of an original optical or magneto-optical recording medium, wherein latency is the waiting time from the request of data to the receiving of the requested data in relation to a rotation speed for receiving of the requested data, the emulator configured to receive data read from the non-original recording medium and to emulate said corresponding at least one latency of said different memory blocks of said original optical or magneto-optical recording medium by outputting different emulator memory blocks so that

• at least one respective latency of at least one part of said different emulator memory blocks output by the emulator corresponds to said corresponding at least one latency of said different memory blocks of said original recording medium,
• wherein said corresponding at least one latency of the different memory blocks of the original optical or magneto-optical recording medium is emulated such that memory blocks with different corresponding latencies are arranged in a predetermined pattern, wherein within said predetermined pattern at least one memory block with a first latency is situated between at least two memory blocks with latencies that are longer than said first latency.

A computer readable storage medium storing computer program instructions which, when executed by a processor, cause the processor to function as an emulator for a non-original optical or magneto-optical recording medium, wherein the non-original optical or magneto-optical recording medium comprises different memory blocks with corresponding latencies for corresponding positions on the non-original recording medium, and wherein at least one latency of said different memory blocks varies from a corresponding at least one latency of said different memory blocks of an original optical or magneto-optical recording medium, wherein latency is the waiting time from the request of data to the receiving of the requested data in relation to a rotation speed for receiving of the requested data, the emulator configured to receive data read from the non-original recording medium and to emulate said corresponding at least one latency of said different memory blocks of said original optical or magneto-optical recording medium by outputting different emulator memory blocks so that at least one respective latency of at least one part of said different emulator memory blocks output by the emulator corresponds to said corresponding at least one latency of said different memory blocks of said original recording medium,

• wherein said corresponding at least one latency of the different memory blocks of the original optical or magneto-optical recording medium is emulated such that memory blocks with different corresponding latencies are arranged in a predetermined pattern, wherein within said predetermined pattern at least one memory block with a first latency is situated between at least two memory blocks with latencies that are longer than said first latency.

An optical or magneto-optical recording medium writing device for writing data onto an optical or magneto-optical recording medium comprising different memory blocks with respective corresponding latencies, the different memory blocks having bits arranged with respective corresponding densities according to the respective corresponding latencies, wherein latency is the waiting time from the request of data to the receiving of the requested data in relation to a rotation speed for receiving of the requested data, the writing device comprising:

• a recording density variation unit configured to alter a respective latency of at least one part of said different memory blocks in respect to a respective corresponding normally used latency for the respective position on the recording medium, wherein said recording density variation unit is configured to change the relative speed of writing data bits and rotating the recording medium, wherein
• when said at least one part of said different memory blocks has a shorter latency, the bits are arranged in a higher density, and when said at least one part of said different memory blocks has a shorter latency, the bits are arranged in a lower density than a normally used density of bits for said at least one part of said different memory blocks;
• and
• said recording density variation unit is configured to arrange memory blocks with different latencies in a predetermined pattern on said optical or magneto-optical recording medium, wherein within said predetermined pattern at least one memory block with a first latency is situated between at least two memory blocks with latencies that are longer than said first latency.

A recording medium accessing device for accessing data from an optical or magneto-optical recording medium comprising different memory blocks with respective corresponding latencies, the different memory blocks having bits arranged with respective corresponding densities according to the respective corresponding latencies, wherein latency is the waiting time from the request of data to the receiving of the requested data in relation to a rotation speed for receiving of the requested data, the accessing device comprising:

• a recording medium verification unit configured to determine whether a respective latency of at least one part of said different memory blocks is altered in respect to a respective corresponding normally used latency for the position on the recording medium, wherein when said at least one part of said different memory blocks has a shorter latency, the bits are arranged in a higher density, and when said at least one part of said different memory blocks has a longer latency, the bits are arranged in a lower density than a normally used density of bits for said at least one part of said different memory blocks, and
• wherein the recording medium verification unit is configured to determine whether memory blocks with different corresponding latencies are arranged in a predetermined pattern on said optical or magneto-optical recording medium, wherein within said predetermined pattern at least one memory block with a first latency is situated between at least two memory blocks with latencies that are longer than said first latency.