Abstract: The continuous update of the Recorded Area Indicator on a DVD+R disc leads to a loss in performance of the recorder. If the update is not continuous, the Recorded Area Indicator on the disc may not accurately reflect the status. In order to ensure that the Recorded Area Indicator accurately reflects the status but avoids loss of performance, the update of the Recorded Area Indicator is performed when a close track session command is issued to the drive signaling the end of the recording, regardless of whether the track or session on the disc remains open. During the recording the Recorded Area Indicator is kept and updated in the memory of the recorder.

Abstract: A video playback apparatus includes: video data inputting unit; a ranking data inputting/generating unit that inputs or generates ranking data where scenes in video data are ranked according to importance; a playback scene determination parameter inputting unit that inputs parameters when determining scenes to be played back according to importance; a playback scene determining unit that determines playback scenes based on ranking data and playback scene determination parameters; and a display unit that displays playback scenes. A viewing time of video data that the user desires and a maximum time width of each playback scene are inputted to the playback scene determination parameter inputting unit, and the playback scene determining unit cuts scenes so that the playback time of the playback scenes fits the maximum time width, and determines the playback scenes so that the sum of the playback time of the playback scenes fits within the viewing time.

Abstract: An information recording medium 1 is provided with: a user data recording part 3 which records user data; a random-pattern-information recording part 4 which records random pattern information from a random physical phenomenon; and an authentication data recording part 5 which records, as authentication data, medium identification information created on the basis of the random pattern information detected from the random-pattern-information recording part 4 and a digital signature for each manufacturer with respect to the medium identification information.

Abstract: Congested rewriting in the same area is to be evaded to suppress the tendency towards occurrence of defective areas. When a stream 1 has been recorded, the last written address, representing the last written position, is stored. When recording a stream 2 next, recording is started directly following the position indicated by the last written address for the stream 1. The last written address, corresponding to the last address of the recording position, is stored. If the stream 2 is erased for recording a stream 3, recording is started not at a position directly following the last written address of the stream 1, but from a position directly following the last written address of the stream 2. When the stream 3 has reached the end of a recording area, the next following data is recorded as from a position directly following the stream 1.

Abstract: This invention relates to a communication system including a first apparatus having a first storage medium, and a second apparatus for transmitting data to the first apparatus, the second apparatus comprising: a second storage medium for storing management information of data to be transferred to the first storage medium; communication means for communicating data with the first apparatus; edit means capable of editing the management information; and control means for making a control to transfer data stored in the second storage medium to the first storage medium by way of the communication means on the basis of the management information edited by the edit means.

Abstract: A recording medium storing a write protection information, and a write protection method for protecting data recorded on a recordable and/or rewritable disc from unwanted overwriting or erasing. In order for write protection of a disc in a bare state that is usually used in a cartridge having a recognition switch for write-protection, such as a DVD-RAM, write protection information is recorded in a Lead-in area, a Lead-out area or a recording information area other than a user data area of the disc, and the data is protected from unwanted overwriting or erasing using the write protection information. Also, even though the write protection information stored on a disc does not match the state of a recognition switch of a case for write-protection, the data can be prevented from unwanted overwriting or erasing. Thus, the write protection can be ensured when a recordable and/or rewritable recording medium, such as DVD-RAM, DVD-R and DVD-RW, is used in a bare state.

Abstract: A method and a host processing device are provided for background formatting, or de-icing, an optical medium with no de-icing assistance from an optical drive upon which the optical medium is mounted. In a foreground mode, an optical medium may be initially formatted, volume structures may be recorded on the optical medium, file system information may be written thereto, and quick grow formatting may be performed to make the optical medium writable, at least sequentially. Under initiation and control of a file system, executing on a host processing device, the optical medium may be formatted, or de-iced, in a background mode with no assistance from an optical drive, upon which the optical medium is mounted. Under control of the file system, blocked input or output activity, may be allowed to access the optical medium upon pausing the formatting, or de-icing.

Abstract: An information reproducing apparatus (1) is provided with: a reading device (10) for reading contents data; an operating device (41) constructed to rotate depending on an operation of a user; a reproducing device (15) for reproducing the contents data, while determining reproduction speed and reproduction direction of the contents data on the basis of the operating signal which shows a rotating operation of the user performed on the operating device; and an adjusting device (22) for adjusting reproducing intensity of a plurality of data parts distributed in the contents data periodically or discretely during the reproduction of the contents data.

Abstract: An optical disk device includes a BE control means which issues a request for recording of data upon an optical disk. Furthermore, this optical disk device includes an FE processing means which, upon receipt of the recording request from the BE control means, irradiates laser light from a pickup head onto the optical disk, and records data stored in a buffer RAM upon the optical disk. If an error has occurred during the recording of the data upon the optical disk by the FE processing means, then the BE control means first acquires, from the FE processing means, error information including an error occurrence address. And the BE control means performs control to execute recovery processing, according to this error information.

Abstract: Theft, distribution, and piracy of digital content on optical media (software, video, audio, e-books, any content of any kind that is digitally stored and distributed) is often accomplished by copying it directly to another disc using commonly available copy tools and recordable optical media, or the copying of media to another mass manufactured disc. Methods which cause the copy process to become lengthy and inconvenient, or which produce copies that are significantly measurably different from the original and therefore be recognizable as copies, may deter or prevent an unauthorized individual from making copies. In addition, methods which generate an intended slow-down in the read process of the media can be used to authenticate the media at run time. This offers significant advantages to content creators who wish to protect their products.

Abstract: An information processing device includes: a writing and erasing means for writing and erasing predetermined information to and from a predetermined recording area of a writable optical disc serving as a recording medium; an estimation information writing means for writing estimation information to the recording area to and from which the information is written and erased by the writing and erasing means; and an estimation means for reading the estimation information written to the recording area by the estimation information writing means and estimating a reproduced signal of the read estimation information.

Abstract: The invention discloses a method for rearranging back-up data, which first starts rearranging a back-up area when a rewritable optical disc is loaded, reads all available replacing blocks on the back-up area, rearranges the order of the replacing blocks based on the order of addresses of corresponding data blocks on the user data area, writes the rearranged replacing blocks into a planned area of the back-up area, and registers the corresponding information to finish the operation of rearrangement for rapidly reading data.

Abstract: An apparatus and a method for quickly starting recording seamless-playable data are provided. At the end of recording a preceding record content, identification information of a clip information file for a subsequent record content to be recorded next is recorded in an attribute information storage file set for the preceding record content. More specifically, a clip information file for a subsequent chapter is reserved at the end of recording of a preceding chapter, and an identifier of the clip information file is recorded in the clip information file for the preceding record chapter. Through the prior reservation process of the clip information file, an updating process for updating the clip information file at the start of recording of the subsequent chapter becomes unnecessary. Data recording, such as a photographing operation of a video camera is thus quickly started.

Abstract: This invention provides an information processing method and apparatus, which can set all extent sizes of data divisionally recorded on a disk to be equal to or larger than the minimum recording unit, and can guarantee continuous reproduction of the divisionally recorded data. Of data divisionally recorded on a recording medium (5), data which corresponds to an end portion of that data and cannot be recorded as a recording area equal to or larger than a minimum recording unit specified in the recording medium (5) due to the presence of a recording area (6) of another data, that has already been recorded on the recording medium (5), is re-recorded on a recording area equal to or larger than the minimum recording unit. At this time, new data is generated by combining data less than the minimum recording unit, and data recorded in another recording area, and the new data is re-recorded on a new recording area.

Abstract: A selection device for a reading and/or writing device for a rewritable Digital Versatile Disk (DVD) includes a selector for selecting a specified complete and limited data area of a plurality of such data areas present on the DVD after a Lead-in Area, and a representer for representing the selected data area to the operating system of a data processing unit, which can only access to a first or a single data area on the DVD as this single or only data area. By transferring a start address of the first or only single data area, which the operating system can access, into a start address of the selected data area, an inquiry of the operating system to the first or single data area is diverted to the selected data area.

Abstract: For use in copying data between a plurality of recording media, the present invention provides a data processing device adds up the amounts of data on a plurality of files recorded on a transmitting medium to thereby detect the total amount of copy data, displays an intermediate result of addition on a display unit while updating the result displayed during a process from the start of addition of the amounts of file data until the completion of addition and displays the final result of addition on the display unit upon the completion of addition. The user is unlikely to feel uneasy even when the detection of the total amount of copy data takes time.

Abstract: A method and system for automatically capturing user edits in a digital recording are described. The method involves determining a beginning time stamp for an edit segment in a digital recording and an ending time stamp for the edit segment in the digital recording. The method then receives an indication from a user whether to modify the edit segment for subsequent viewing of the digital recording.

Abstract: An improved system and method enhances performance of updates to sequential block storage of a storage system. A disk-based sort procedure is provided to establish locality among updates (write data) held in a disk-based log, thereby enabling the write data to be efficiently written to home locations on a home location array. As the write data is received, a log manager of the storage system temporarily stores the data efficiently on the disk-based log. As more write data arrives, the log manager sorts the data in the log in accordance with the sort procedure, thus increasing the locality of data when stored on the home location array. When the log approaches capacity, the log manager writes the sorted data to their home locations on the array with high locality and performance.

Abstract: In the case where data are recorded in a medium, after a specific type of a medium in which recording is performed is set, if it is detected that information is recorded on an address of specific position at which decoding information is to be located, then data at a section in which the decoding information is located are replaced with predetermined information and recording is performed. Alternatively, when data are to be reproduced from a medium, after it is discriminated that data are reproduced from a medium of a specific type, if it is determined that data are reproduced from an address of specific position at which the decoding information is to be located, then reproduction data of a section in which the decoding information is located is replaced with predetermined information and outputted.

Abstract: A playback apparatus plays back data from a recording medium having recorded thereon a file system representing association between identification information for identifying a file and a position where the file is recorded, pieces of segment data constituting the file, and markers for the respective pieces of segment data, each marker that is recorded after a key marker specified in certain cases including location information of the key marker. The playback apparatus includes a detector that detects a last marker in a recording area where data has been recorded on the recording medium but has not been reflected on the file system, and a restoration processor that executes a restoration process of reflecting on the file system segment data that has been recorded on the recording medium but has not been reflected on the file system, based on the location information of the key marker and the location information of segment data.

Abstract: An optical storage reconditioning module extends the life of re-writable optical medium, such as DVD+RW optical storage disks, by writing random information to recondition commonly used portions of the optical medium before re-writing information to those portions of the optical medium. For instance, a stored file system structure of an optical medium, such as a Universal Disk Format (UDF) random writable file system, is updated by reading to a buffer the structure from the optical medium, over writing the structure with random information recondition transitions between data points of the structure, updating the file system structure in the buffer and writing the updated file system structure over the random information.

Abstract: A recording apparatus includes an acquiring unit for acquiring, from an optical disc, disc-state information including at least information of an optical disc type, information of a recording format, and information indicating whether the optical disc has already been finalized, a first determining unit for determining, based on the information of the optical disc type and the information of the recording format in the acquired information whether the optical disc type and the recording format correspond to one of predetermined combinations, a second determining unit for determining, based on the result of determination by the first determining unit and the acquired information, whether the optical disc needs to be finalized, and a display control unit for controlling, when the second determining unit determines that the optical disc needs to be finalized, display of a message representing the need of the finalization.

Abstract: A reproducing apparatus performing reproduction of a play list by inserting a frozen image when the length of data of a clip to be referred by the play list is smaller than the minimum unit which is capable of continuing reproduction of video/audio (Continuous Data Area (CDA)), or by combining the clip equal to or smaller than the CDA with part of another clip to be referred by the play list to generate a new combined clip having a length equal to or longer than the CDA, and changing a reference clip in the play list into the combined clip.

Abstract: This invention is a recording medium recording method for an optical disc or the like. Every time one VTS is prepared, padding processing is executed to secure a recording area for new TMP_VMGI following that VTS and for VTSI and VTSM VOBS of the subsequent title. As, every time one VTS is prepared, new TMP_VMGI following that VTS is recorded, TMP_VMGI is recorded at the position that is added to the number of VTSs. Therefore, even when the management information becomes unreadable because of update exceeding the rewriting durability of the medium with respect to the recording area of TMP_VMGI on the innermost side, the management information can be read from TMP_VMGI recorded in the other recording areas and the finalizing processing can be executed.

Abstract: In electronic devices such as combination CD-ROM and MP3 recorder/players power is conserved by buffering audio or visual data in a solid state memory, preferably of the FLASH or DRAM type, before writing the data to a rotating hard disk. Alternatively, audio and/or visual data, including musical works and still pictures and video, read from a rotating hard disk may be buffered in the same solid state memory while being played. By rotating the hard disk drive only for transfer of audio-visual data, which is normally compressed, in blocks, the hard drive may be stopped both during relative lengthy accumulation, and/or use, of this data, and energy conserved.

Abstract: A device for recording information on a storage medium (11) is arranged for formatting the storage medium. The device has receives a format command according to a protocol (ATA/ATAPI). The device has formatting means for formatting a multilayer storage medium according to the format command. The formatting includes recording, on each layer (L0, L1) of the multilayer storage medium, a first control zone (71, 72) at a first radial position on the layer and a second control zone (73, 74) at a second radial position on the layer for forming an annular data zone of a selected size between the control zones. If the format size is smaller than a maximum available size on the storage medium, the control zones are positioned on substantially equal radial positions for forming radially corresponding annular data zones (75, 76). The required format size equals the sum of the selected sizes of each annular data zone.

Abstract: An optical apparatus calculates, based on the information data recording time, a recording area recording information data and an area to be finalized that is expected to become an unrecorded area after the information data is recorded, and alternately repeats recording of information data into the recording area and finalization including recording of predetermined dummy data into an area to be finalized a predetermined distance away from the calculated information data recording area. Once recording of the information data is complete and the information data recording area is fixed, the apparatus records predetermined dummy data into a remaining non-finalized area of the recording medium to perform finalization.

Abstract: A recording medium storing a write protection information, and a write protection method for protecting data recorded on a recordable and/or rewritable disc from unwanted overwriting or erasing. In order for write protection of a disc in a bare state that is usually used in a cartridge having a recognition switch for write-protection, such as a DVD-RAM, write protection information is recorded in a Lead-in area, a Lead-out area or a recording information area other than a user data area of the disc, and the data is protected from unwanted overwriting or erasing using the write protection information. Also, even though the write protection information stored on a disc does not match the state of a recognition switch of a case for write-protection, the data can be prevented from unwanted overwriting or erasing. Thus, the write protection can be ensured when a recordable and/or rewritable recording medium, such as DVD-RAM, DVD-R and DVD-RW, is used in a bare state.

Abstract: A recording device executes unattended recording after suspending dubbing when a preset recording time draws near during the dubbing, and saves dubbing-status information showing the suspension position of the dubbing. The recording device reads the dubbing status information after the end of the unattended recording, and resumes the dubbing from the suspension position. If suspension/resumption during the dubbing of a single source content results in a plurality of duplicate contents, the recording device edits the duplicate contents into a single content or a single playback route.

Abstract: A recording apparatus for recording second information on a write-once recording medium having first information recorded thereon, the recording apparatus including: a host apparatus; and a drive apparatus, wherein the host apparatus includes a storage section for storing the second information; and an instruction section for instructing the drive apparatus to record the stored second information on the write-once recording medium, the drive apparatus includes a generation section for generating correlation information for correlating the first information and the second information; a head section for recording the second information on the write-once recording medium; and a control section for controlling the head section to record the second information and the correlation information on the write-once recording medium.

Abstract: A recording method includes the steps of detecting whether unique information is recorded in a storage medium outside a predetermined area managed by a management data that manages data in a data area on a storage medium; generating unique information when in the detecting step no unique information is detected as being recorded in the storage medium; and recording the unique information when generated in the generating step to the storage medium outside the area managed by the management data.

Abstract: A file system is enabled to use a Metadata Partition instead of VAT for write-once discs, and is provided by a pseudo-overwrite method with a plurality of tracks especially for metadata and file data. On applying this invention to a drive apparatus that supports pseudo-overwrite media, the file system distinguishes data to overwrite from data to append (S1701). When the data is newly written to a logical sector, the drive apparatus writes the data to a physical sector to which the logical sector corresponds (S1703). When the data being overwritten is data stored in the logical sector, the data is written to the other unrecorded physical sector in the volume space (S1704), and remapping information is written (S1705). The remapping information specifies the original address of the physical sector, and the remapping address of the physical sector in which the data is written.

Abstract: A method for copying information from a multi-layered optical source disc (2S) to on a multi-layered optical target disc (2T) is described. A first portion (67) of the source data is located in a first source storage space (LsO), and a second portion (68) of the source data is located in a second source storage space (LsI). The first source data portion has a logical end address (M) smaller than the physical end address (Nt) of the first target storage space (LtO). All source cells from the first source storage space are recorded into a first target data portion (77) of the first target storage space. The remainder portion (74) of the first target storage space is defined as a dummy data portion. Then, the cells from the second source data portion (68) are recorded into a second target data portion (78) of the second target storage space (LtI).

Abstract: When a blank DVD-RW disk is loaded into an optical disk drive, a host computer issues a FORMAT command to the disk drive. The optical disk drive having received the command performs quick formatting pursuant to a standard. Subsequently, the host computer issues a WRITE command to the optical disk drive in an idle time thereof, thereby instructing recording of dummy data. Consequently, an advantage analogous to that yielded as a result of background formatting of a DVD+RW disk is yielded, and the entirety of the DVD-RW disk can be formatted readily.

Abstract: A method for recording data on an optical medium is disclosed. In one embodiment, the method includes receiving a first plurality of frames of data at a Cross Interleave Reed-Solomon Code (CIRC) encoder, encoding the first plurality of frames of data by the CIRC encoder to generate a second plurality of frames of data, generating a set of data to form a Q sub-channel, altering selected data bits in the Q sub-channel to form an encoded Q sub-channel, forming a plurality of control bytes including the encoded Q sub-channel, adding one of the control bytes to each one of the second plurality of frames of data to generate a third plurality of frames of data, encoding selected portions of the third plurality of frames of data by an EFM encoder to generate a plurality of channel frames, and recording the channel frames on the optical medium. This method allows CDs to be recorded that cannot be played by conventional CD players.

Abstract: A recording medium that is a write-once recording medium with data rewritability, thereby increasing the usability of the write-once recording medium, is provided. In a write-once recording medium, a main data area has a normal record and playback sub-area (a user data section), a rewriting replacement sub-area (an OSA), and a replacement management sub-area (an ISA). In response to a request to write data to an address at which data has been recorded, the rewritten data is recorded in the rewriting replacement sub-area (the OSA), and replacement management information that associates the original address with the address in the rewriting replacement sub-area is recorded into the replacement management sub-area (the ISA). Thus, data rewriting is achieved. Accordingly, a write-once recording medium can be substantially used as a data rewritable recording medium.

Abstract: To provide a method of managing data in a situation where audio and video data, acquired by a single video recording session, has been split into multiple files. A data processor writes a data stream, representing video, and management information for playing back the video based on the data stream on at least one storage medium. In the data stream, picture data of respective pictures forming the video and time information, showing presentation times of the respective pictures, are stored in association with each other. The data processor includes: a processor for generating, as the management information, a table that associates the time information, storage locations of the picture data in the data stream, and file information identifying a stream file to store the picture data with each other for one or more pictures; and a controller for writing the data stream and the management information as one or more stream files and as one or more management information files, respectively, on the storage medium.

Abstract: Management information is read from an information storage medium having the management information recorded thereon, the management information including track number information imparted to at least one track and group management information for managing as selective recording information one or a plurality of tracks as one group. Judgment is then made upon whether the group management information is included in that management information. A display mode is changed depending on a case where the group management information is recorded and a case where it is not recorded, and it is then displayed in a displaying device.

Abstract: A method for generating a recovered table of contents (TOC) for an optical disc having an damaged TOC and a predetermined file system includes selecting a recovering session on the optical disc; determining a recovering session starting location corresponding to a first SRR starting location in the recovering session; determining if the recovering session is a closed session; and if the recovering session is a closed session: determining a data size of the recovering session; calculating a next session starting location immediately following the recovering session by adding the data size of the recovering session, a temp-leadout size of the recovering session, and a temp-leadin size of the next session to the recovering session starting location; and constructing the recovered TOC by including information of recovering session and the next session starting location.

Abstract: A recording medium storing a write protection information, and a write protection method for protecting data recorded on a recordable and/or rewritable disc from unwanted overwriting or erasing. In order for write protection of a disc in a bare state that is usually used in a cartridge having a recognition switch for write-protection, such as a DVD-RAM, write protection information is recorded in a Lead-in area, a Lead-out area or a recording information area other than a user data area of the disc, and the data is protected from unwanted overwriting or erasing using the write protection information. Also, even though the write protection information stored on a disc does not match the state of a recognition switch of a case for write-protection, the data can be prevented from unwanted overwriting or erasing. Thus, the write protection can be ensured when a recordable and/or rewritable recording medium, such as DVD-RAM, DVD-R and DVD-RW, is used in a bare state.

Abstract: Audio-centered information is stored on a unitary medium by using a Table-of-Contents (TOC) mechanism that specifies an actual configuration of various audio items on the medium. In particular, each one of a set of one or more Track Areas gets at least two mutually logically conforming Sub-TOCs assigned. This allows to retrieve any constituent Sub-TOC part from at least any correct copy of the Sub-TOCs. Furthermore, one or more Master-TOCs are provided for specifically pointing to each of the Sub-TOCs.

Abstract: An information recording apparatus encodes distributed information, which is inputted via a network, in an encoding scheme for allowing decode by a plurality of types of players to obtain encoded distributed information, and when the distributed information is distributed including reproduction control information, the apparatus generates applicable reproduction control information for controlling reproduction aspects on actual reproduction based on the reproduction control information so as to record the applicable reproduction control information and encoded distributed information on an optical disk DK. Furthermore, when the distributed information is recorded, the apparatus records attribute information indicating that together with the encoded distributed information.

Abstract: A record medium comprises an original data obtained by superimposing a presentation target data, to which an error correction encoding is performed and an identification information.

Abstract: There is provided an apparatus for recording and reproducing information. The apparatus comprises a reading device to read out information recorded on a recording medium, a first recording device in which the information read out by the reading device is written, an output device to output the information written in the first recording device, a second recording device in which the information read out by the reading device is recorded, and a controller. The controller controls the reading, first recording, output, and second recording devices such that an operation specified by an operation command and directed to all the information recorded on the recording medium is performed, during an operation for recording the information into the second recording device, and the recording operation is continued.

Abstract: A method of formatting a rewritable optical recording medium includes registering defective blocks in a primary defect lists (PDL) and performing a slipping replacement corresponding to the number of PDL registrations, determining whether an error has occurred in the slipping replacement, and if it is determined that the error has occurred in the slipping replacement, adjusting a recording capacity of the optical recording medium by checking the number of un-slipped PDLs and reducing the recording capacity by the number of un-slipped PDLs. As a result, even if the error has occurred in the slipping replacement due to insufficient spare area, the PDL registration is still maintained without formatting error, thereby causing the optical recording medium to be usable.

Abstract: When a portion of an audio object comprising a head pack having a system header is to be deleted, a copy of the system header of the pack is inserted in a pack which is the end boundary of deletion. This gives a new head pack after the deletion a system header having the same contents as the deleted pack. Even when audio data comprising a system header is partially deleted by editing or the like and the system header disappears, this system header can be reproduced.

Abstract: A digital recording system for stereophonic audio signals is disclosed. Included is an MP3 encoder coupled to an ADC for encoding the two channels of digital audio signals into a compressed data stream. Before being directed into a flash memory for editing, the compressed data stream is split into the original two channels of audio data blocks. An editing device is coupled to the flash memory for block-by-block editing of the stored audio data blocks. On being subsequently retrieved from the flash memory, the two channels of audio data blocks are reformatted into an MP3 data stream preparatory to introduction into an MP3 decoder.

Abstract: An information recording apparatus is provided with: a receiving device for receiving record information of a first format; a converting device for converting the first format of the received record information into a second format that is different from the first format; and a recording device for recording the record information of the second format on a recording medium.

Abstract: An information storage medium includes an area in which updated disc-related information and recording-related information updated with a change in at least one of a disc version number and a recording speed is recorded along with existing disc-related information and recording-related information. The existing disc-related information and recording-related information are recorded, and the updated disc-related information and recording-related information is recorded in an area in which the existing disc-related information and recording-related information is recorded. Accordingly, data can be recorded/reproduced on/from a new version of information storage medium even using an existing drive.

Abstract: In the case where data are recorded in a medium, after a specific type of a medium in which recording is performed is set, if it is detected that information is recorded on an address of specific position at which decoding information is to be located, then data at a section in which the decoding information is located are replaced with predetermined information and recording is performed. Alternatively, when data are to be reproduced from a medium, after it is discriminated that data are reproduced from a medium of a specific type, if it is determined that data are reproduced from an address of specific position at which the decoding information is to be located, then reproduction data of a section in which the decoding information is located is replaced with predetermined information and outputted.