Patent ID: 7680023

Claim:
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 a 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, wherein a respective latency of at least one part of said different memory blocks is altered in respect to a respective corresponding normally used latency of a respective position on said record carrier, 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 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.