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US 2006/0133243 A1Published application
Method and apparatus for reproducing information
AssigneeVictor Company of Japan, Ltd.
InventorsJunichiro Tonami, Takayuki Ohki
Life of this patent
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AssigneeVictor Company of Japan, Ltd.
InventorsJunichiro Tonami, Takayuki Ohki
Estimating the term…
An information signal is read from a recording medium to generate a reproduced signal. A sync detector detects a sync signal in the reproduced signal on a pattern search basis during operation in a direct mode. The sync detector sets a detection window and detects a sync signal in the reproduced signal in the detection window during operation in an inertia mode. A special pattern signal in the reproduced signal is detected and counted to generate a count result. The count result is reset in response to detection of a first special signal in the reproduced signal. A detection flag is generated in cases where a second special signal in the reproduced signal is detected when the count result denotes a last sector in a block of the reproduced signal. The sync detector changes its operation from the inertia mode to the direct mode when the detection flag is generated.
1-13. (canceled)
A recording medium storing an information signal divided into a plurality of blocks each including “m” sectors, each of the sectors being divided into “n” frames having a length corresponding to a prescribed number of clock periods, “m” and “n” denoting natural numbers equal to or greater than 2, each of the frames including a sync signal having a pattern selected from a plurality of different patterns, each of the blocks including a first special signal in a position before a first sector, each of the blocks including a second special signal in a position after a last sector, the second special signal having a pattern equal to one of the different patterns for the sync signal, each of the sectors including a special pattern signal.
A recording medium as recited in claim 1, wherein the first special signal has a pattern equal to one of the different patterns for the sync signal.
A recording medium as recited in claim 1, wherein the special pattern signal is the sync signal in a first frame in each sector.
A recording medium as recited in claim 1, wherein the special pattern signal has a pattern differing from the different patterns for the sync signal.
An apparatus for detecting sync signals from a recording medium and reproducing information from the recording medium in response to the detected sync signals, the recording medium storing an information signal divided into a plurality of blocks each including “m” sectors, each of the sectors being divided into “n” frames having a length corresponding to a prescribed number of clock periods, “m” and “n” denoting natural numbers equal to or greater than 2, each of the frames including a sync signal having a pattern selected from a plurality of different patterns, each of the blocks including a first special signal in a position before a first sector, each of the blocks including a second special signal in a position after a last sector, the second special signal having a pattern equal to one of the different patterns for the sync signal, each of the sectors including a special pattern signal, the apparatus comprising:
A computer program in a computer readable medium for use in an apparatus for detecting sync signals from a recording medium and reproducing information from the recording medium in response to the detected sync signals, the recording medium storing an information signal divided into a plurality of blocks each including “m” sectors, each of the sectors being divided into “n” frames having a length corresponding to a prescribed number of clock periods, “m” and “n” denoting natural numbers equal to or greater than 2, each of the frames including a sync signal having a pattern selected from 10 or less different patterns, each of the blocks including a first special signal in a position before a first sector, each of the blocks including a second special signal in a position after a last sector, the second special signal having a pattern equal to one of the different patterns for the sync signal, each of the sectors including a special pattern signal, the apparatus reading the information signal from the recording medium to generate a reproduced signal, the computer program comprising the steps of:
A computer program as recited in claim 6, further comprising the step of replacing the direct detection mode of operation by the inertia mode of operation for detection of a sync signal and setting a position of the sync detection window to a predicted position of a sync signal in a first frame when the first-special-signal detection flag is generated.
A computer program in a computer readable medium for use in an apparatus for detecting sync signals from a recording medium and reproducing information from the recording medium in response to the detected sync signals, the recording medium storing an information signal divided into a plurality of blocks each including “m” sectors, each of the sectors being divided into “n” frames having a length corresponding to a prescribed number of clock periods, “m” and “n” denoting natural numbers equal to or greater than 2, each of the frames including a sync signal having a pattern selected from 10 or less different patterns, each of the blocks including a first special signal in a position before a first sector, each of the blocks including a second special signal in a position after a last sector, the second special signal having a pattern equal to one of the different patterns for the sync signal, the information signal including a sector address signal, the apparatus reading the information signal from the recording medium to generate a reproduced signal, the computer program comprising the steps of:
Dependencies are inferred from the claim text.