Optical record carrier

摘要

The invented optical record carrier, such as optical disk with information signal record, such as audio signal has a recorded digital representation of modulated signal, which alone is a representation of an encoded digital signal, corresponding to the recorded information signal, whereby the digital representation is recorded in the form of a combination of depressions and depression-free sections corresponding to NRZ-1 modulation, forming a sequence of depressions and depression-free sections that represent a sequence of bits in information blocks with ni1 bites corresponding to individual coded words of the encoded digital signal, and having each in intermediate separation blocks ni2 bits. In a successive sequence of individual bits following each other in a sequence being formed by at least an information block of ni1 bits, a separation block of ni2 bites and another information block of ni1 bits, the channel bits of logical value 1 are separated from each other by at least d channel bits and at the most k channel bits of the logical value 0, wherein d is greater than or equal to 2 and k is at the most equal to n-4, wherein n is the number of bits in channel code words, whose are represented by sequences of depressions and depression-free sections on the record carrier. Each separation block is formed by a bit sequence that consists of either logical zeroes in all ni2 bit positions or logical zeroes in all ni2 bit positions with exception of one bit position, where the logical zero meets the condition of the number of ai1 logical zeroes in preceding and subsequent places of the channel bits d is less than or equal to ai1 which in turn is less than or equal to k and for which the value of numerical sum in the NRZ-I modulation has from the beginning of the information signal up to each corresponding information block the least absolute value.