Abstract: A system controller is provided so as to record the second disk type information having the same content as that of the first disk type information, which is recorded in a DVD-R in advance, in a DVD-R in which the first disk type information is recorded as well as to record the record information in the DVD-R and reproduce the record information only if the first disk type information and the second disk type information have the same contents each other upon reproducing the record information.

Abstract: To provide an information recording apparatus and so on which can improve convenience of handling even if music information is encoded in an LPCM system with a high quality and recorded therein. Music information M obtained by encoding a musical composition which should be reproduced in an uncompressed state, first control information G1 for controlling the compressed music information PM, compressed music information PM including a content same as at least any one of the music information M, and second control information G2 for controlling the compressed music information PM, the second control information G2 including corresponding information RR representing a corresponding relationship between the music information M and the compressed music information PM.

Abstract: An information processor including a processing device for recording information on a recording medium or reproducing the information recorded on the recording medium, is provided with: an encrypting/decrypting device which is capable of an encrypting operation for encrypting the information to be recorded when the information is recorded on the recording medium and a decrypting operation for decrypting the information to be reproduced from the recording medium when the information is reproduced from the recording medium; the processing device which includes the two or more encrypting/decrypting devices; a control device which controls the encrypting/decrypting device so as to perform one of the encrypting operation and the decrypting operation; and a switching device which switches a transmission path of the information to the encrypting/decrypting device in response to one of the operations performed by the encrypting/decrypting device.

Abstract: To provide an information recording apparatus and so on which can improve convenience of handling even if music information is encoded in an LPCM system with a high quality and recorded therein. Music information M obtained by encoding a musical composition which should be reproduced in an uncompressed state, first control information G1 for controlling the compressed music information PM, compressed music information PM including a content same as at least any one of the music information M, and second control information G2 for controlling the compressed music information PM, the second control information G2 including corresponding information RR representing a corresponding relationship between the music information M and the compressed music information PM.

Abstract: A system controller is provided so as to record the second disk type information having the same content as that of the first disk type information, which is recorded in a DVD-R in advance, in a DVD-R in which the first disk type information is recorded as well as to record the record information in the DVD-R and reproduce the record information only if the first disk type information and the second disk type information have the same contents each other upon reproducing the record information.

Abstract: An information converting method of converting audio information, which comprises a plurality of partial-audio information based on a predetermined record standard in each of which output control information to control a state of the audio information at a time of outputting the audio information to an external portion is included, into transmission information to be transmitted through a data bus based on a predetermined transmission standard, is provided with: an extracting process of extracting the output control information from each of the partial-audio information; a dividing process of dividing the audio information for each information amount, which is set in advance so as to transmit the transmission information through the data bus, to thereby generate divided-audio information; a generating process of adding the extracted output control information onto the generated divided-audio information to thereby generate an information unit for transmitting the audio information through the data bus; and an

Abstract: In an information recording medium, the position of each bit in the bit arrangement (800b) consisting of a plurality of bits is related to each channel corresponding to the position of each speaker in the speaker arrangement (800a) consisting of a plurality of speakers. By the value of each bit, the channel assignment information (800I) is recorded to indicate whether audio data of a corresponding channel is present. Moreover, a plurality of audio data whose presence is indicated by the channel assignment information is recorded for each channel.

Abstract: A system controller is provided so as to record the second disk type information having the same content as that of the first disk type information, which is recorded in a DVD-R in advance, in a DVD-R in which the first disk type information is recorded as well as to record the record information in the DVD-R and reproduce the record information only if the first disk type information and the second disk type information have the same contents each other upon reproducing the record information.

Abstract: An information processor including a processing device for recording information on a recording medium or reproducing the information recorded on the recording medium, is provided with: an encrypting/decrypting device which is capable of an encrypting operation for encrypting the information to be recorded when the information is recorded on the recording medium and a decrypting operation for decrypting the information to be reproduced from the recording medium when the information is reproduced from the recording medium; the processing device which includes the two or more encrypting/decrypting devices; a control device which controls the encrypting/decrypting device so as to perform one of the encrypting operation and the decrypting operation; and a switching device which switches a transmission path of the information to the encrypting/decrypting device in response to one of the operations performed by the encrypting/decrypting device.

Abstract: A system controller is provided so as to record the second disk type information having the same content as that of the first disk type information, which is recorded in a DVD-R in advance, in a DVD-R in which the first disk type information is recorded as well as to record the record information in the DVD-R and reproduce the record information only if the first disk type information and the second disk type information have the same contents each other upon reproducing the record information.

Abstract: A crosstalk canceler includes: unit for obtaining signals of a target track and at least one track neighboring to the target track formed on an optical disc on which crosstalk detection signals are recorded; unit for generating timing signal indicating periods of the crosstalk detection signals; unit for multiplying the signal of the neighboring track by a coefficient to produce a multiplied signal; unit for subtracting the multiplied signal from the signal of the target track to output an output signal; unit for detecting levels of the output signal at the periods of the crosstalk detection signals; and unit for accumulating the levels and outputting the accumulated levels as the coefficient.

Abstract: An optical disc includes a signal recording track spirally formed on the surface of the optical disc, information pits formed on the signal recording track, and a plurality of non-signal regions periodically formed on the signal recording track, wherein no information pit is formed on the non-signal region.

Abstract: An apparatus reads data signal recorded on an optical disc on which a gathering track including n recording tracks and a guard track neighboring to the gathering track are spirally formed. The apparatus includes: light beam irradiating unit for irradiating (n+1) light beams onto boundaries of the n recording tracks and the guard track, photodetecting unit for receiving (n+1) light beams reflected by the surface of the optical disc and producing (n+1) track boundary data signals, and computing unit for calculating the (n+1) track boundary data signals to produce n read-out data signals corresponding to the data signals recorded on the n recording tracks.