Abstract: A receiving unit, receiving method, and semiconductor device that reduce the size of circuits in a receiving unit. A receiving section receives signals sent from a base station and transmitted through a plurality of paths. A path tracking section detects timing of each of the plurality of paths through which the signals received by the receiving section were transmitted. A demodulating section demodulates the received signals by performing a despreading process according to the timing of the plurality of paths detected by the path tracking section. A correlation value calculating section calculates a correlation value between the received signals and a spreading code.

Abstract: An information record medium is provided with: a first record layer (107) for recording first information, and one or more second record layers (207) disposed on said first record layer, each second layer being for recording second information, each layer of said second layers has a predetermined area (PCA1-1) where a power calibration is performed to detect an optimum recording power of recording laser beam transmitted through the first record layer and another layer of the second layers, said another layer positioned closer to said first record layer than said each layer, and in opposite areas (TA) of said another layer and said first record layer, said opposite areas being opposite to said predetermined area of said each layer of said second layers, a first absolute amount of at least one of width and depth of a groove is increased and thereby light transmittance in said opposite areas is approached to (i) light transmittance under an assumption that the first absolute amount is not increased and said anot

Abstract: A semiconductor device that quickly saves data stored in an area to which power is supplied intermittently. Power is supplied intermittently to a first area. Power is supplied continuously to a second area. A memory is located in the second area. A save circuit saves data used in the first area in the memory before the supply of power being stopped. A restoration circuit restores data which has been saved in the memory to a predetermined circuit in the first area. A power supply control circuit supplies power to the memory if data has been saved in the memory. Otherwise the power supply control circuit stops the supply of power to the memory.

Abstract: An object of the invention is to provide an optical disc in which the influence of recording interference is reduced to make it possible to narrow the interval between adjacent recording tracks and increase the recording density of information. The optical disc comprises a substrate 1 on which the grooves G are formed, a reflecting layer 2 for reflecting an optical beam, a recording layer 3, and a cover layer 5 for protecting the recording layer 3, in which the cover layer 5, the recording layer 3, the reflecting layer 2 and the substrate 1 are disposed in this order from the side where the optical beam is applied, and the thickness of the recording layer 3 formed in an area opposed to the groove G and forming a recording track TR is greater than the thickness of the recording layer 3 formed in an area opposed to an area on the substrate 1 between two adjacent grooves G.

Abstract: A processor (1) having an instruction memory (2) supplies addressing information and setting values to be set to registers (REGA to REGD) to a setting interface unit (3), and address values of the registers are outputted from an address output unit (5) based on the addressing information. The outputted address values and the setting values are outputted respectively to registers to set setting values, so that the processor can set the setting values to be set to the registers without being conscious of the addresses of the registers, and thus it becomes possible to reduce addressing portions of the respective registers in the instruction codes, and reduce the number of instruction codes, which facilitates coding of the instruction codes.

Abstract: There are provided an arithmetic unit and a receiver unit which execute an arithmetic operation at a high speed and allow reduction of the size thereof. An input section inputs data of the data group. First to n-th (n>1) storage sections have a capacity capable of storing at least part or all of the data group. A readout section selects one of the first to n-th storage sections and reads out therefrom a data group already stored therein. An arithmetic section performs a predetermined arithmetic operation between the data group read out by the readout section and the data group newly inputted by the input section. A writing section writes a result of the predetermined arithmetic operation by the arithmetic section in a predetermined one of the storage sections, which is not selected by the reading section as the one from which the data group already stored therein is to be read out.

Abstract: A write-once-type information recording medium is provided with: a user data area to record therein record data; a spare area to alter thereto one portion of addresses of said user data area, along with defect management in said user data area or logical overwriting to said user data area; and a defect management area to record therein defect management information which includes an alternative list and identification information, the alternative list indicating a correspondence relationship between an alternative source address in said user data area which is altered to said spare area and an alternative destination address in said spare area, the identification information being intended to identify whether each alternative is based on the defect management or the logical overwriting.

Abstract: Shift code patterns at four continuous phases obtained by dividing 15 shift code patterns given to the respective flip-flops of a linear feedback shift register of degree 4 into four parts are stored in a code memory (11). Besides, mask code patterns to shift a phase of a PN code (PN) to be generated by every four phases, are stored in a code mask memory (12). Next, a logical operation is performed at a phase shift circuit (13) by using the shift code pattern outputted from the code memory (11) and the mask code pattern outputted from the code mask memory (12), to generate a PN code (PN) having a code length of 15 from a random phase.

Abstract: A receiving unit that reduces the amount of power consumed for detecting the timing of each of a plurality of paths via which received signals were received. A receiving section receives signals sent from a base station and transmitted via a plurality of paths. A path detecting section detects the timing of each of the plurality of paths via which the received signals received by the receiving section were transmitted. A path detection range setting section sets a range where a path is detected by the path detecting section on the basis of information indicative of path timing detected by the path detecting section.

Abstract: A recording medium is one on which recording information can be recorded at one or several types of recording speeds. The recording medium comprises a recording area on which the recording information is recorded, and a recording speed range information recording area which can be necessarily used when recording the recording information on the recording medium and contains at least a basic recording speed preset for each type of the recording medium, and on which recording speed range information indicating a range of the recording speed preset for each type of the recording medium is recorded.

Abstract: An optical disc capable of repeated recording, such as a DVD?RW, is applicable. An information recording and reproducing apparatus starts recording by making a sync pattern of recording data correspond to a recording reference position determined by an LPP formed on the disc at the time of recording new data on the disc. Afterward, the apparatus continues the recording by gradually shifting a position of the sync pattern of the recording data with respect to the recording reference position, and performs the recording with a shift quantity fixed to the predetermined shift quantity when the shift quantity thereof reaches a quantity equal to or larger than a predetermined quantity. Thereby, at a rewriting portion on the optical disc, the shift between recorded data and a recording start position of recording data for rewriting can be small, and establishing synchronization at the time of reproducing or rewriting can be stably performed.

Abstract: A processor and method of booting the processor in which dispensable circuit operation is eliminated to reduce power consumption. A first expected check-sum value relating to instructions and table data and a second expected check-sum value relating only to instructions are held in a boot ROM. When power is turned on, if a power-on determination circuit determines that the power has been turned on for a system, a read selection circuit loads instructions and the table data into an instruction storage memory and a table data storage memory and a check-sum performing circuit performs check-sum using the first expected check-sum value. In the case where the power has been turned on for periodic operation, instructions are loaded into the instruction storage memory, check-sum is performed using the second expected check-sum value, and table data that was saved in a backup memory is loaded into the table data storage memory.

Abstract: At least a portion of groove tracks in a information-data recording region of an optical recording medium comprises a plurality of groove portions separated by groove-absent portions in a rotational direction of the optical recording medium, each of the mark portions or each of the space portions includes one of the groove-absent portions. At least one of two groove tracks adjacent to prepit train, which is formed in land tracks, has a continuous groove portion or a groove-absent portion extending at least from a leading end to a trailing end of at least one prepit included in the prepit train in a rotational direction of the optical recording medium. The frequency band for separation of the groove tracks includes at least a portion of a frequency band of a modulated recording signal for recording information data on the optical recording medium.

Abstract: A proposed semiconductor device is directed to making unnecessary circuit operation inactive to reduce power consumption because of leakage current. The device is functionally divided into blocks. The power supply systems of the blocks are divided into a non-controlled power supply group in which power is always on and controlled power supply groups in each of which groups a supply of power can be turned on/off independently. When a power supply system control part of the non-controlled power supply group outputs a control signal for power on, a power switch part turns on to release the controlled power supply group from the sleep mode, so that the first processing part starts intermittent operation. Only when it is determined that a first next-processing necessity determining part determines necessity of the next processing, a control signal is generated to activate the next power supply group.

Abstract: By the control information recording method, control information to control at least one of recording and reproducing operations of record information on an information record medium is recorded onto a guide track of the information record medium. The control information recording method is provided with the steps of: generating a control information timing signal one after another at an interval corresponding to a length of a control information unit equal to an N (N: predetermined integer not less than 2) multiple of a length of a record information unit of the record information; and recording the control information onto the guide track of the information record medium, on the basis of a timing corresponding to the control information timing signal.

Abstract: A recording medium includes a lead-in area which includes a control data area and an information data area in which information data is to be recorded. In this recording medium, a groove track in the control data area is divided into a plurality of mark portions and space portions based on a frequency band of a recording RF signal.

Abstract: A groove track and a land track are alternately and spirally formed on an information recording medium. On the land track neighboring the groove track, pre-information indicating position information of a track on a disc is formed as a prepit. On the information recording medium, an embossed area is formed so that information about a copyright and for preventing an illegal copy cannot be rewritten. In the embossed area, an embossed configuration including a pit and a space of predetermined depths is formed. The prepit in the embossed area is formed so that the prepit has an optimized configuration according to a pit length and a space length in the embossed area which the prepit neighbors. Consequently, interference between the embossed configuration and the prepit can be prevented even in a case that the prepit is formed in addition to the embossed configuration in the embossed area.

Abstract: In a code generation device for generating a code: a binary-data generation circuit generates first binary data items indicating every (m+1)th one of n successive binary numbers, where m≧1 and n≧2. A binary-data derivation circuit derives m+1 second binary data items indicating m+1 binary numbers from each of the first binary data items, where the m+1 binary numbers include the first binary data item. A first processing circuit performs a predetermined common operation on identical portions of the m+1 second binary data items, and a second processing circuit performs individually predetermined operations on non-identical portions of the m+1 second binary data items, where states of corresponding bits in the non-identical portions of the m+1 second binary data items are not identical. A combining circuit combines the outputs of the first and second processing circuits.

Abstract: An optical disc (1) is provided with: a disc substrate (110); an information track (102, G) formed on the disc substrate spirally or coaxially around a center of the disc substrate, on which an information signal including a physical sector number is to be recorded; and a guide track (102, L) adjacent to the information track and formed on the disc substrate spirally or coaxially around the center, on which a guide signal including address information is to be recorded, wherein a readable emboss area, in which the information signal is recorded by an emboss pit, and an unreadable emboss area, in which an unreadable emboss pit to disable writing and reading the information signal, are formed on the information track, and the guide signal is not recorded on the guide track corresponding to the readable emboss area and the guide signal is recorded on the guide track corresponding to the unreadable emboss area.

Abstract: A recording medium comprises pairs of groove tracks and land tracks provided side by side while being bent periodically, a plurality of land prepits previously formed on the land tracks and carrying information about the groove tracks, and a recording layer formed on at least the groove tracks and the land tracks. The land prepits have a radius of mean curvature smaller than a radius of mean curvature of sides of the groove tracks in land-prepit absent regions of the land prepits and are defined by curved surfaces continuously extending from the sides of the groove tracks. Those sides of the groove tracks which face the continuous curved surfaces of the land prepits are curved surfaces that stricture the groove tracks.