1757results about "Auxillary data arrangement" patented technology

An object of the present invention is to provide a stereoscopic video recording method, a stereoscopic video recording medium, a stereoscopic video reproducing method, a stereoscopic video recording apparatus, and a stereoscopic video reproducing apparatus that are capable of more optimally performing recording and reproduction of stereoscopic video. According to one solving means of the present invention, a stereoscopic video recording method records, in a recording medium, stereoscopic video including left-eye images (2) and right-eye images (1) utilizing parallax information, by using a stereoscopic video recording apparatus (6). From video content that contains stereoscopic images, the method grasps the amount of variation in parallactic angle having a given or larger value, a variation time that the variation in parallactic angle takes, and the number of times that the variation in parallactic angle occurs. The method then calculates an evaluation value that corresponds to the degree of eye fatigue on the basis of the amount of variation, the variation time, and the number of times of the variation, encodes the video content in such a manner that the evaluation value is within a given range, and records the encoded video content in the recording medium.

A multi-layered information recording medium including a plurality of recording layers, the multi-layered information recording medium comprising: a user data area for recording user data; and a plurality of spare areas including at least one replacement region, wherein when the user data area includes at least one defect region, the at least one replacement region may be used in place of the at least one defect region, wherein a first spare area of the plurality of spare areas is positioned so as to be contiguous to a first user data area of a first recording layer, a second spare area of the plurality of spare areas is positioned so as to be contiguous to a second user data area of a second recording layer, and the first spare area and the second spare area are positioned approximately at the same radial position on the multi-layered information recording medium.

It is an object of the present invention to improve reliability of defect management. By providing a plurality of management data areas each including a defect management area typically in a lead-in zone of a disc inner-side region enclosed by a circumference having a predetermined radius on a disc-shaped recording medium, reliability of the defect management can be obtained. In addition, by placing a plurality of the defect management areas (information areas Info1 and Info2) at locations, which are separated from each other in the radial direction of the disc-shaped recording medium, sandwiching a recording / reproduction condition adjustment area OPC having a relatively large size, the reliability of the defect management areas can be further improved. Furthermore, by providing each of the defect management areas with a plurality of recording areas, which include a currently used recording area for recording defect management information and spare recording areas each usable as a substitute for the currently used recording area, the currently used recording area can be replaced with one of the spare recording areas in accordance with an update count of the currently used recording area or error status of this currently used recording area.

A method and apparatus for recording on an optical recording medium, including the recording of management information, are described as a standard for the write-once Blu-ray disc. The management information is recorded in a management area of the disc, such as a temporary defect management area (TDMA), and includes record status information and update information. The record status information is a space bitmap (SBM) indicating whether a recording operation has been performed for a predetermined area of the disc, and the update information is SBM update information indicating whether the record status information is to be continuously managed. The SBM update information controls the state of an SBM-on / off function for each of a plurality of recording areas and may be in the form of either start position information and length information corresponding to the respective areas or an SBM update flag. The SBM update information is recorded in the TDMA and is stored in a memory of an optical disc recording / reproducing device for use during recording and reproducing operations. At the time of recording in the predetermined area, an SBM-on state enables a logical overwriting operation to be performed as necessary.

A recording disc and recorded information reproducing apparatus and method for immediately starting reproduction of information when a push-pull based tracking control is employed to reproduce recorded information from the recording disc. The recording disc comprises an information data area for recording recording marks which carry information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area.

In order to enhance the usability of a write-once recording medium, the recording medium is provided with an ordinary recording / reproduction area, an alternate area, a first alternate-address management information area and a second alternate-address management information area. In addition, written / unwritten state indication information is recorded in a predetermined area. The second alternate-address management information area is an area allowing alternate-address management information recorded therein to be renewed by adding alternate-address management information to the area. Alternate-address management information recorded in the second alternate-address management information area includes information recorded in a first information format and information recorded in a second information format. The first information format shows an alternate source address and an alternate destination address for each data unit. On the other hand, the second information format shows an alternate source address and an alternate destination address for a group of a plurality of physically continuous data units. The second information format is used as a format for effectively carrying out an alternate-address process on such a group of data units. All alternate-address management information is recorded in the first alternate-address management information area in the first information format.

The present invention relates to a method for securing content on a recording medium. Input content data are encrypted and recorded on a recording medium. A resultant value obtained by applying a hash function to the content data recorded after encryption is recorded on the recording medium for validation of the content. According to the present invention, once hashing operation for validation of content is carried out after encryption of content data is done, an apparatus for reproducing a recording medium storing content can easily check the validity of stored content by carrying out hashing operation only.

Information indicative of disk-applicable recording speeds is incorporated in lead-out start time information within ATIP information that is recorded in pre-grooves located in a lead-in area of an optical disk. Once the optical disk is inserted in an optical disk recording device, the lead-out start time information is read out, so that recording is performed on the optical disk after a recording speed is automatically set to a highest settable speed value within a range specified by the read-out lead-out start time information. This arrangement can reliably prevent recording at speeds beyond predetermined limit values unique to the optical disk.

Provision is made to perform a write trial process in a stable manner at all times in a write trial area for the purpose of determining optimum recording power. Sub-areas of the write trial area are used successively from an inner circumference side of the medium to an outer circumference side of the medium with respect to the spiral direction that extends from the outer circumference side of the medium to the inner circumference side of the medium, and the sub-areas of the write trial area are used successively from the outer circumference side of the medium to the inner circumference side of the medium with respect to the spiral direction that extends from the inner circumference side of the medium to the outer circumference side of the medium With this provision, the write trial process is performed by accessing a sub-area portion of interest without accessing the sub-area portion having undergone the write trial, no matter which record layer is used. Servo control and address read can thus be stabilized. As a result, a seek operation toward the sub-area of interest is also stabilized, thereby achieving a stable write trial process.

A write once disc allowing management of a data area, a method of managing the data area of the write once disc, an apparatus recording data on the write once disc, an apparatus and method of reproducing data from a write once disc. The write once disc, includes a lead-in zone, a data area, and a lead-out zone. The write once disc includes a predetermined area storing area allocation information which indicates whether at least one section of the data area is allocated for disc defect management. In the disc and method, area allocation information specifying a structure of the data area is recorded on the disc, thus allowing a recording / reproducing apparatus to recognize the data area structure. Therefore, allocating areas, such as a spare area, for disc defect management other than an area for storing user data, to the data area is possible. The allocation of the areas for disc defect management to the data area enables effective use of the write once disc.

In an optical disc in / from which data is recorded or reproduced by irradiating a storage area on the optical disc with a laser, information containing recording velocity information (RVI) for recording / reproduction, which represents a linear velocity different from the standard linear velocity, and write strategy information (WSI) corresponding to the recording velocity information is stored in a land pre-pit or the like on the optical disc.

A high-density optical disc such as BD-RE (Blu-ray Disc Rewritable) or BD-ROM, and a recording / reproducing method thereof are disclosed. Diverse additional information such as disc reflectivity information, disc layer information or disc type information is efficiently recorded in a particular information field included in a data unit recorded on the burst cutting area of a high-density optical disc or a particular 1-byte address field included in an address unit recorded on the high-density optical disc so that it can be read when the high-density optical disc is loaded in an optical disc apparatus or when a data recording or reproducing operation for the high-density optical disc is carried out. Accordingly, it is possible to achieve optimal optical power control and automatic gain control or identification of a current position, while enabling a normal data recording or reproducing operation corresponding to the type of the optical disc.

An optical recording medium having a read-only storage area and a writable storage area and a recording / reproducing apparatus and method therefor. The optical recording medium is a hybrid disc having both the read-only storage area, which is suitable for mass production of information having the same contents, and the writable storage area on which data can be recorded, updated or added at a user's option. The read-only storage area has a structure that is completely compatible with a digital versatile disc read only memory (DVD-ROM) specification, and the writable storage area is compatible with the recording / reproducing characteristics of a writable DVD specification so that an existing reproducing-only apparatus can read information from the read-only storage area, and data can be recorded in the writable storage area using an apparatus obtained by minimally changing an existing recording / reproducing apparatus while maintaining the physical recording characteristics of the existing recording / reproducing apparatus.

Calibration of holographic data storage systems (HDSS) is provided by utilizing holographic media (4) having calibration features which can be read, written, or read and written by a HDSS (30). Calibration features may represent for example, surface-relief gratings, holographic recordings, amplitude varying regions, or magnetic regions, or a combination thereof, at locations on or within the media. One or more of the calibration features along media region (302) are media calibration features with media and format information, and other calibration features along region (301) are system calibration features for optically and mechanically aligning HDSS optics. The media (4) may have performance calibration features along region (307) which can be recorded by a HDSS and then read back to determine characteristics of the media. Different HDSS systems can read the calibration features of the media (4) when installed in each HDSS to obtain information about the media, and to optically and mechanically align the media for optimal operation with the media.

A method of recording read / write compatibility information on an optical disc. Extended part version information, latest part version having recording capability, and latest part version having reproducing capability are stored in n.xy form on 6 bytes of a reserved zone of a physical format information zone of the optical disc. A recording / reproducing apparatus to record extended part version information on a reserved zone of a physical format information zone of a recording medium. The recording / reproducing apparatus has a base part version and a comparing unit to determine recording / reproducing compatibility with a recording medium having a detailed extended part version stored in a reserved zone of a physical format information zone.

An optical information storage medium includes information on recording layers having the same reproduction channel characteristics or different reproduction channel characteristics. Nominal recording speed information is recorded in a read-only zone, and maximum and minimum recordable speed information is recorded in a recordable zone of an area other than a user data area. The nominal recording speed information is reproduced using a differential signal channel or a sum channel, and the maximum and the minimum recordable speed information is reproduced using the sum channel. The optical information storage medium addresses a situation where the nominal recording speed is not satisfied due to errors occurring during the manufacture of the storage medium. Thus, the defective disc proportion can be reduced, and loss of user data due to application of inaccurate recording layer information can be prevented.