Abstract: A data record medium on which a digital signal has been recorded in which the digital signal is composed of main data and a sub code, the sub code having time information representing reproduction elapsed time, and the sub code being recorded in association with the main data, wherein information that represents the reproduction elapsed time of the sub code is represented with a binary coded decimal number and address information in synchronization with the time information of the main data is represented with a binary number, the address information being contained in the main data.

Abstract: A recording medium includes an area in which data encoded with an error correction code is recorded. In the recording medium, data which contains an error uncorrectable with the error correction code, and data which does not contain an error uncorrectable with the error correction code are recorded in predetermined pattern.

Abstract: A contents data processing method comprises the steps of, at the time of processing contents data, reproducing character information changed with processing of the contents data, and selectively changing processing of the contents data in accordance with the reproduced character information.

Abstract: The present invention is relative to a data recording medium having plural recording areas. This recording medium includes a first recording area (2), a second recording area (4) for recording data having allocated address data different from address data allocated to data recorded in the first recording area, and identification data recorded in the second recording area for discriminating the first and second recording areas from each other.

Abstract: A method is provided for recording medium having a substrate on which first data and second data are recorded as a protrusion/depression pattern and a reflective layer that is provided on a surface having the protrusion/depression pattern. Laser light is radiated to the reflective layer to change the protrusion/depression pattern of the second data, and third data used for identifying the recording medium is additionally recorded at a predetermined position on the recording medium.

Abstract: The present invention is relative to a data transmission method for transmitting data such as encrypted content data. A device which is to be a destination of transmission is authenticated and, if the device has not been authenticated, encrypted data read out from a storage unit is decrypted to give decoded data, which then is re-encrypted, based on innate key data acquired from the device which is to be the destination of transmission, to give re-encrypted data. The re-encrypted data is then transmitted to the device which is to be a destination of transmission.

Abstract: According to the type of each of a plurality of external input interfaces, it is decided whether digital watermark information is to be detected from data entered via the external input interface. Digital watermark information is not detected from data entered via the external input interface and from which it has been decided not to detect any digital watermark information, but the data is recorded. Thus, there can be provided a data recording apparatus which is not applied with a any heavy load owing to the omission of any unnecessary detection of digital watermark information.

Abstract: Program data and information associated with at least a consumer commodity that appears in a program of the program data are synchronously transmitted. The program data and the information associated therewith are received. The received program data is reproduced. The reproduced data is displayed on a displaying portion. Information associated with one selected from a plurality of consumer commodities displayed on the displaying portion is extracted and displayed. The viewer can buy a consumer commodity at a store corresponding to the extracted information.

Abstract: A recording medium within which are recorded content data in which additional information including management information having a data length corresponding to a packet is embedded in a state where the content data are distributed to a plurality of packets, wherein the management information includes an information portion where information is rewritable and an information portion where information is not rewritable and an identifier for identifying the rewritable information portion and the nonrewritable information portion is provided for each of the information portions.

Abstract: The present invention provides an optical disc recording method of irradiating an optical beam to an optical disc including a basal plate made of synthetic resin which has a concavo-convex pattern formed in advance on one surface thereof, and a reflective coat made of metal which is formed over the concavo-convex pattern on the basal plate, to physically change the concavo-convex pattern so as to record identification data.

Abstract: A data recording medium having an address-representing portion formed of a predetermined number of bits for representing time information composed of minutes, seconds, and frames in a binary coded decimal notation, wherein addresses represented in a binary notation instead of the binary coded decimal notation are placed in the address-representing portion.

Abstract: When the user designates the reproduction of searching audio data, the designated searching audio data and audio volume data are read from a searching data recording portion. The searching audio data is reproduced corresponding to the audio volume data. When the user designates the reproduction of main audio data, the selected audio data is read from a disc and reproduced. In addition, number-of-reproduction-times data, audio volume data, audio quality data, and time period data for the designated main audio data that are updated in the searching data storing portion. The searching audio data corresponding to the designated main audio data is read from the disc corresponding to the audio quality data and the time period data and recorded to the searching data storing portion.

Abstract: A recording and/or reproducing method for a record medium, comprising the steps of reading address information from a record medium, the record medium having at least a first area and a second area, data being recordable to the first area, the second area being followed by the first area, the address information representing the position of the second area, detecting an error corresponding to error detection code encoded for the address information that has been read from the record medium, and when the result of the detecting step represents that an error has been detected in the address information that has been read from the record medium, notifying at least a user that the error has been detected.

Abstract: A recording medium includes at least a recording area in which pieces of content data are recorded, and a lead-in area in a position that is read before the recording area is read. In one of the recording area and the lead-in area, identification information which indicates whether the recording medium is for a rental use is recorded.

Abstract: Data areas AR1 and AR2, lead-in areas LIN1 and LIN2, and lead-out areas LOUT1 and LOUT2 are provided on a disc. For example, in case of encrypting and recording data into the data area AR2, copyright management information R2 and key information K2 are recorded into the lead-out area LOUT2. Only information in a Q channel of a subcode is recorded in the lead-out area and this area is filled with dummy data. A position of the lead-out is obtained from TOC information. The fact that a light spot has entered the lead-out area can be judged from the information in the Q channel. The copyright management information and key information are recorded by using the lead-out area. The lead-out area is not rewritten or accessed by an ordinary CD player, so that the copyright management information and the key information can be safely held.

Abstract: The present invention is a recording method for a record medium, comprising the steps of embedding a plurality of types of management information provided corresponding to a plurality of types of record mediums as additional information to data of a content that is recorded, performing a first encoding process for the data of the content to which the additional information has been embedded, performing a second encoding process for the plurality of types of management information; and modulating the data of the content of which the first encode process has been performed and the plurality of types of management information of which the second encode process has been performed. The present invention is also the record medium.

Abstract: When content data is encrypted and recorded, the content data is block-segmented and chain-encrypted. At that point, an initial value is generated using content data of the same sector. When content data is an MPEG stream, an initial value is generated using unique information such as a header. Thus, it is not necessary to generate an initial value using a random number or the like. Thus, there is no loss in the data area. In addition, since content data varies at random, the secrecy of the initial value is high. In addition, since it is not necessary to provide a random number generator or the like, the circuit scale does not increase.

Abstract: A recording medium such as an optical disk has a write-once recording area in which information can be recorded once and cannot be rewritten. The write-once recording area is provided with a billing information recording area in which billing information is sequentially recorded a single time. With this arrangement, it is possible to effectively prevent the unauthorized use of the medium when carrying out off-line billing processing.

Abstract: A method of recording and/or reproducing data to and/or from a recording medium is provided. A user identification data read from a recording medium having recorded therein main data to be recorded and/or reproduced and the user identification data is compared with a one read from a data recorder/player for recording or reproducing the main data, and the main data are recorded to or reproduced from the recording medium when the user identification data read from the recording medium is coincident with that read from the data recorder/player.

Abstract: This invention is a method for recording digital data in accordance with the recording format to a recording medium, in which the type of a loaded recording medium is identified, and on the basis of the result of the identification, a data format is selected for embedding sub data into data to be recorded onto the loaded recording medium so that the data is readable as optical changes. Then, whether the recording area in which recording is to be carried out is a recording area in which the sub data should be embedded or not is discriminated, and if the result of the discrimination indicates that the area in which recording is to be carried out is a recording area in which the sub data should be recorded, the sub data is embedded and recorded into the data to be recorded in a predetermined recording area on the recording medium on the basis of the selected data format.