摘要:
A phase-change optical storage medium includes a recording layer that has an alloy of Ge—Sb—In—Sn, as a main component in the materials that constitute the recording layer. Composition ratios of Ge, Sb, In and Sn in the alloy satisfy ranges 0.08≦a≦0.20, 0.60≦b≦0.80, 0.05≦c≦0.20, and 0.01≦d≦0.15, where “a”, “b”, “c” and “d” are the composition ratios of Ge, Sb, In and Sn, respectively, at a +b+c+d=1. A percentage of the alloy in the materials that constitute the recording layer may be 50% or higher.
摘要翻译:相变光存储介质包括在构成记录层的材料中具有Ge-Sb-In-Sn合金作为主要成分的记录层。 合金中的Ge,Sb,In和Sn的组成比满足范围0.08 <= a <=0.20,0.60≤b≤0.80,0.05≤c≤0.20,0.01≤d≤0.15,其中“ a + b + c + d = 1时,分别为Ge,Sb,In和Sn的组成比,“b”,“c”和“d” 构成记录层的材料中的合金的百分比可以为50%以上。
摘要:
A recording medium includes first information selected from a plurality of information patterns and second information selected from another plurality of information patterns for the true-false judgement. A true-false judging device performs a statistic analysis when any coincidence is found between the readout combination of the first and second information and registered combination patterns, to identify an inspected recording medium as a forged product based on the result of the statistic analysis.
摘要:
An optical information recording medium (1) is composed of a pit recording area (2), wherein various control information is recorded by a prepit, and a user recording area (3) having a guide groove formed in a groove format, and a phase depth for the prepit and the groove are approximately the same wherein the phase depth is less than or equal to λ/10, wherein λ is a wavelength for reproducing light source. A recording/reproducing apparatus (4) for the optical information recording medium (1) includes decoding means (12) for decoding information by detecting a tangential push-pull reproduced signal from the prepit recording area (2) and detecting an aggregated signal from the user recording area (3).
摘要:
An optical disc has a support base and at least one information-retrieval layer formed over the support base. The information-retrieval layer is transparent and thinner than the support base. The information-retrieval layer exhibits variation in birefringence within ±20 nmpp (nano meter peak to peak) under double-pass measurements during one rotation of the optical disc.
摘要:
Errors in a first data signal of a first error correction code system in a reproduced signal are corrected to get first correction-resultant data. Errors in a second data signal of a second error correction code system in the reproduced signal are corrected to get second correction-resultant data. All address information pieces in the second correction-resultant data for every error correction block are subjected to error checks. When at least one of all the address information pieces is correct, a descramble initial value is set in response to the correct address information piece. When all the address information pieces are erroneous, a correct address information piece is estimated from an address information piece associated with a previous error correction block and the descramble initial value is set in response to the estimated correct address information piece. The first correction-resultant data are descrambled in response to the descramble initial value.
摘要:
An input two-dimensional image is divided into equal-size blocks. MIP maps with different resolutions are generated in response to each of the blocks. A memory stores data representative of the MIP maps for each of the blocks. Polygon data represent conditions of a polygon and also a correspondence between the polygon and positions of pixels of a two-dimensional image to be applied to the polygon. On the basis of the polygon data, at least one is selected from the MIP maps represented by the data in the memory as a desired MIP map on a pixel-by-pixel basis. Data representative of the desired MIP map are read from the memory. Calculation is made as to a color intensity of each pixel in a final image in which the desired MIP map is applied to the polygon on a pixel-by-pixel basis. Data representative of each calculated pixel color intensity are outputted.
摘要:
In a data using apparatus, first data use history information is generated in accordance with every use of data. The first data use history information represents a starting time and an ending time of every use of data. The first data use history information is sent toward an external apparatus. Second data use history information is received from the external apparatus. Calculation is made as to first data use terms between the starting times and the ending times represented by the first data use history information. Calculation is made as to second data use terms between starting times and ending times represented by the second data use history information. Multiple apparatus use notice information is generated when at least one of the calculated first data use terms and at least one of the calculated second data use terms overlap each other.
摘要:
In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10%. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas 31 and 32. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recording/reproducing area 32 respectively, are more than 0.1 and satisfy an inequality 1.5≧T1/T2≧0.5.
摘要:
An optical disc of a recordable type or a rewritable type has a plurality of recording layers including first and second recording layers. A laser beam is applied to the second recording layer through a used area in the first recording layer to record arbitrary information on at least a part of the second recording layer. The used area in the first recording layer has been used for at least one of information recording and data recording. Positional information is generated. The generated positional information is of a blank area in the second recording layer which occurs due to the presence of an unused area in the first recording layer. The blank area adjoins the unused area. The generated positional information is recorded on a predetermined area in the optical disc.
摘要:
A packet recording/reproducing system is provided which records or reproduces packets on or from tracks formed in time sequence on a magnetic tape. In a recording operation, the packet recording/reproducing system adds to input packets time stamps whose values are synchronous with packet arrival time control clocks produced by the system. The timing with which the packets are recorded on the magnetic tape is controlled by the arrival time control clocks so that a given number of the packets inputted at high data rate are recorded within a one-track area, a two-track area, or a one-track over area defined across at least two of the tracks, thereby minimizing the loss of capacity of the magnetic tape.