JP2006216207A - Recording device, and recording system and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device, and a recording system and a method which can appropriately record a real time content to a recording medium. <P>SOLUTION: In a recording system 10, a recording device 200 executes the recording for data concerned with the real time content supplied by a host 100. Although the recording is performed in an ECC block unit, when the recording fails, all the ECC blocks accumulated in a buffer 240 for the data at the moment are discarded. A CPU210 generates error information including the number of the blocks failed in the recording, an address of a sector failed in the recording, and the discarded number of the blocks, and stores it in a memory 280 as the error information to be referred to by the host 100. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technical field of a recording apparatus such as a DVD drive and a DVD recorder, and a recording system and method including such a DVD drive and a host.

  A method of recording data on a recording medium in real time has been proposed (see, for example, Patent Document 1).

  According to the method described in Patent Document 1 (hereinafter referred to as “conventional technology”), information on a defective area existing in a recording area of an optical recording medium (ie, recording medium) such as an optical disk is returned to the host. The data is recorded while avoiding the defective area. Therefore, even if it is a defect area discovered for the first time at the time of data recording, data can be recorded avoiding this, and real-time data can be recorded.

JP-A-2004-5942

  However, the conventional techniques have the following problems.

  For example, when the host is a personal computer (PC) or the like, an application program (hereinafter referred to as a “host program” as appropriate) that causes the PC to function as a host is executed. Various applications including the host program are operating on the operating system, and information regarding the defective area does not necessarily reach the host program accurately. If the information about the defective area does not reach the host program, it is impossible for the host to recognize the data recording failure, and it is difficult to normally record the real-time data. Also, the time when data recording failed and the time when error information is returned to the host are different on the real time axis, and the data corresponding to the time difference has already been recorded as normal recording data from the host. It is supplied to the recording device. Even if a past data recording failure is reported in this state, it is very difficult for the host program to generate a new write command for the already supplied data. That is, the conventional technique has a technical problem that it is difficult to record real-time content on a recording medium.

  The present invention has been made in view of the circumstances described above, for example, and it is an object of the present invention to provide a recording apparatus, a recording system, and a method capable of suitably recording real-time content on a recording medium. .

In order to solve the above-described problem, the recording apparatus of claim 1 records data related to real-time content sequentially supplied from a host in association with a plurality of recording areas on the recording medium. A recording apparatus which is associated with each of the supplied data and performs according to a command sequentially supplied from the host to instruct recording of each of the supplied data, and sequentially stores the supplied data A first buffer to be stored, a second buffer to sequentially store the supplied command, and a plurality of commands stored in the first buffer corresponding to each of a plurality of commands stored in the second buffer. Recording means for sequentially recording each of the data in the recording areas corresponding to each of the plurality of recording areas, and the plurality of stored data. Discarding means for discarding at least one of the other data of the accumulated data and the command corresponding to the other data when the recording fails for one of the data; When the recording fails, generating means for generating error information indicating that the recording has failed with respect to the recording area corresponding to each of the one data and the other data, and storing the generated error information Storage means;
And a notification means for notifying the host of the stored error information at a predetermined timing.

In order to solve the above-described problem, a recording system according to claim 5 is a recording system for recording real-time content on a recording medium, and data relating to real-time content is stored in a plurality of recording areas on the recording medium. First supply means for supplying in association with each other, second supply means for supplying a command for instructing recording of each of the supplied data in association with each of the supplied data, and A first buffer for sequentially storing the supplied data; a second buffer for sequentially storing the supplied command; and the first buffer corresponding to each of the plurality of commands stored in the second buffer. Recording means for sequentially recording each of the plurality of data stored in the buffer in a recording area corresponding to each of the plurality of recording areas; Discard discarding at least one of the other data and the command corresponding to the other data among the plurality of accumulated data when the recording fails for one of the plurality of accumulated data Means for generating error information indicating that the recording has failed with respect to a recording area corresponding to each of the one data and the other data when the recording fails, and the generated error Storage means for storing information, notification means for notifying the stored error information at a predetermined timing, and each of the one data and the other data based on the error information for which the notification has been performed Complementing means for performing a predetermined type of supplementary processing on the corresponding recording area, and the first supply means is independent of whether or not the recording has failed. It supplies the serial data, the second supply means, characterized in that the recording is to supply the command regardless of whether failure.

  In order to solve the above-described problem, a recording method according to claim 6 is a recording method for recording real-time content on a recording medium, and data related to real-time content is stored in a plurality of recording areas on the recording medium. A first supply step of supplying in association with each other; a second supply step of supplying a command for instructing recording of each of the supplied data in association with each of the supplied data; and A first accumulation step for sequentially accumulating the supplied data in the first buffer; a second accumulation step for sequentially accumulating the supplied command in the second buffer; and an accumulation in the second buffer. Recording each of a plurality of data stored in the first buffer corresponding to each of a plurality of commands with respect to a recording area corresponding to each of the plurality of recording areas A sequential recording step, and when the recording fails for one of the plurality of accumulated data, the other data of the plurality of accumulated data and the command corresponding to the other data A discarding step of discarding at least one of them, and a generation step of generating error information indicating that the recording has failed with respect to a recording area corresponding to each of the one data and the other data when the recording fails A storage step for storing the generated error information, a notification step for notifying the stored error information at a predetermined timing, and the one data and the one based on the error information for which the notification has been performed A supplementing step of performing a predetermined type of supplementing process on the recording area corresponding to each of the other data, and the first supply step includes a loss of the recording. And Whether or not to supply independently the data, the second supplying step, characterized in that the recording is to supply the command regardless of whether failure.

<Embodiment of Recording Apparatus>
In an embodiment of the recording apparatus of the present invention, recording of data related to real-time content sequentially supplied from a host in association with a plurality of recording areas on the recording medium is performed on the recording medium. A first buffer that sequentially stores the supplied data, corresponding to a command sequentially supplied from the host for instructing recording of each of the supplied data Each of a plurality of data stored in the first buffer corresponding to each of a plurality of commands stored in the second buffer and a second buffer for sequentially storing the supplied commands A recording means for sequentially performing recording on a recording area corresponding to each of the plurality of recording areas; and one of the plurality of accumulated data. And when the recording fails, the discarding means for discarding at least one of the data corresponding to the other data and the command corresponding to the other data, and when the recording fails Generating means for generating error information indicating that the recording has failed with respect to the recording area corresponding to each of the one data and the other data, storage means for storing the generated error information, and Notification means for notifying the host of the stored error information at a predetermined timing.

  In the present invention, the “recording medium” refers to an optical information recording medium such as a BD (Blue-lay Disc), DVD, or CD. Therefore, in the present invention, the “recording device” refers to a device capable of writing data to these various recording media, such as a BD drive or a DVD drive. In addition, the “host” in the present invention is a concept that prescribes widely a means for instructing the recording apparatus of the present invention to record data on a recording medium and supplying data to be recorded, For example, it refers to a computer system such as a personal computer (personal computer), a workstation, or a server device, or a dedicated device (for example, a DVD recording device) for recording data on these recording media. The host refers to a computer program for causing these devices to achieve the effects of the present invention. Alternatively, the host refers to both of these computer programs and computer systems. For example, the host and the recording device may be integrally configured in advance, such as a DVD recording device, or the recording device may be retrofitted or externally attached as in a personal computer environment.

  In the present invention, “real-time content” is a concept that defines content that requires real-time performance when recording (or recording) on a recording medium. For example, analog or digital broadcasting received via terrestrial waves It refers to various programs such as dramas, movies, sports, live, variety, news, etc. in various broadcasting forms such as satellite broadcasting or cable television broadcasting. Therefore, “data related to real-time contents” refers to data groups that constitute these real-time contents, which are sequentially supplied on the real-time axis in accordance with the reception or playback status of the real-time contents to be recorded. .

  According to the recording apparatus of the present invention, during the operation, the data related to the real-time content supplied from the host is sequentially stored in the first buffer. Similarly, a command is supplied from the host to instruct recording of each of the supplied data, and is sequentially supplied to the second buffer. Here, the data stored in the first buffer is supplied in association with the recording area on the recording medium. Here, “corresponding to a recording area” indicates that an area on a recording medium to which data is to be written is specified, for example, that a sector address is specified. Information indicating this correspondence may be included in a command stored in the second buffer. The data stored in the first buffer is sequentially recorded by the recording means in a region corresponding to each on the recording medium in a one-to-one correspondence with the command stored in the second buffer. When a command is referred from the second buffer for recording, or when data is referenced from the first buffer, the command and data are lost from each buffer.

  Here, in particular, when there is a manufacturing defect (that is, a primary defect) in the recording medium, it is registered in a defect list (for example, a primary defect list) stored in a predetermined area of the recording medium in advance. The host can easily perform data recording while avoiding these. In addition, even when there are defects that are clarified in actual use of the recording medium (that is, secondary defects such as scratches, fingerprints, and attached dust), the defect list (for example, secondary defect list) is already present. If it is a registered defect, it is possible to record data while avoiding this as well. However, when a defect is detected for the first time at the time of data recording, the data recording cannot be normally executed due to, for example, a tracking error or a focusing error.

  In the present invention, when data recording fails, at least one of the data currently stored in the first buffer and the command stored in the second buffer is discarded by the discarding unit. Therefore, at the time of this discarding, the recording of the data that failed to be recorded and the data accumulated in the first buffer are not performed. Further, error information indicating a recording failure is transmitted from the recording apparatus to the host. However, this error information does not always reach the host as described above. When error information does not reach the host, it is of course impossible to take appropriate measures against it.

  However, the embodiment according to the recording apparatus of the present invention solves the problem as follows. That is, when recording fails in one of the data stored in the first buffer, the recording is performed by the generating unit with respect to the recording areas corresponding to the data that failed to be recorded and the data discarded by the discarding unit. Error information indicating failure has been generated and stored by the storage means. Further, the stored error information is notified to the host at a predetermined timing by the notification means.

  The generated error information is temporarily stored in the storage means unlike the above-described error information output to the host when recording fails, so the host refers to this error information when the processing capacity is sufficient. It becomes possible to do. Therefore, it becomes possible to record real-time content on the recording medium.

  For example, when a defect management method such as DRT-DM (Distributed Real-Time Defect Management) is adopted, the error information is added to the errors of types 1 to 3 defined in the method. For example, the error information may be generated as Type 4 error information. At this time, the error information may be stored in a DBI (Distributed Block Information) memory. That is, the DBI memory may function as a storage unit according to the present invention.

  In one aspect of the embodiment of the recording apparatus of the present invention, the recording apparatus further comprises detection means for detecting whether or not each recording has failed for each recording area, and the discarding means performs the recording by the detection means. When it is detected that the data has failed, at least one of the other data and the command corresponding to the other data is discarded, and the generation unit detects that the recording has failed by the detection unit In this case, the error information is generated.

  According to this aspect, it is detected quickly and reliably that the recording has failed, for example, by the detecting means that detects that the servo has been released. Therefore, based on this detection result, it becomes possible to discard data and commands at the time of recording failure and to generate error information quickly and reliably.

  In one aspect of the embodiment of the recording apparatus of the present invention, the host supplies the data relating to the real-time content in units of a predetermined block associated with an address on the recording medium, and the first The buffer stores the data in units of blocks, the second buffer stores the commands in units of blocks, the recording unit records the data in units of blocks, and the discarding unit Discarding at least one of the data and the command in units of the block, the generating means at least (i) the address corresponding to the block in which the recording has failed, and (ii) the block in which the recording has failed The error information is generated so as to include the total number of blocks of each discarded block.

  The “predetermined block” described here refers to, for example, a recording unit when data is recorded on a recording medium. For example, when the recording medium is a DVD, a BD, or the like, data is recorded on these recording media in units of ECC blocks. In this case, the “predetermined block” may be an ECC block. The ECC block is composed of, for example, 16 sectors that are the minimum recording unit on the recording medium. Therefore, if the number of ECC blocks is known, the data size is naturally known.

  According to this aspect, since the error information is generated so as to include the address of the sector corresponding to the block in which the recording has failed and the total number of blocks of the block in which the recording has failed and the discarded block, the host side Relatively easily, it is possible to specify an area on a recording medium where normal data recording has not been performed.

  In another aspect of the embodiment of the recording apparatus of the present invention, the notification means performs the notification when the notification of the error information is requested from the host as the predetermined timing.

  According to this aspect, since notification is made when notification of error information is requested from the host, it becomes possible to appropriately notify error information according to the processing load situation on the host side, and efficient recording is possible. Realized.

Such a notification request from the host may be made via a command such as “Get Performance command DBI Information”.
<Embodiment of Recording System>
An embodiment according to the recording system of the present invention is a recording system that records real-time content on a recording medium, and supplies data related to the real-time content in association with a plurality of recording areas on the recording medium. First supply means, second supply means for supplying a command for instructing recording of each of the supplied data in association with each of the supplied data, and the supplied data A first buffer that sequentially stores, a second buffer that sequentially stores the supplied command, and a first buffer that corresponds to each of a plurality of commands that are stored in the second buffer. Recording means for sequentially recording each of the plurality of data in a recording area corresponding to each of the plurality of recording areas, and the plurality of stored data Discarding means for discarding at least one of the other data and the command corresponding to the other data among the plurality of accumulated data when the recording fails for one of the data; and the recording And a storage for storing the generated error information, and generating means for generating error information indicating that the recording has failed with respect to the recording area corresponding to each of the one data and the other data Means, notification means for notifying the stored error information at a predetermined timing, and the recording area corresponding to each of the one data and the other data based on the error information for which the notification has been made The first supply means supplies the data regardless of whether the recording has failed or not. The second supply means supplies independently a command of whether the recording has failed.

  According to the embodiment of the recording system of the present invention, during the operation, data relating to real-time content is supplied by the first supply unit, and a command for instructing recording thereof is supplied by the second supply unit. Then, the notification of the error information is performed by the notification means via each means equivalent to each means in the recording apparatus described above. The first and second supply means correspond to at least a part of the host described above.

  In the embodiment according to the recording system of the present invention, the first supply means sequentially supplies data regardless of the presence or absence of recording failure, and the second supply means relates to the presence or absence of recording failure. Sequentially supply commands. When data recording fails, data recording is performed according to a command that is irreversibly supplied in this way. Therefore, data that has failed to be recorded and data discarded from the buffer are not recorded on the recording medium. As described above, the error information returned to the host at the time of recording failure is deferred error information. When the host receives this error information, new data has already been recorded on the real time axis. This is because it is supplied by one supply means, and at the same time, the corresponding write command is normally issued by the second supply means.

  That is, it is almost impossible to record data (or a data group) recognized on the host side as having been normally executed based on this delayed error information on a recording medium without impairing real-time performance. Therefore, the first and second supply means daringly ignore such recording failures and supply data and commands relating to real-time contents to the recording apparatus side sequentially.

  Therefore, when recording is completed and a data file related to real-time content is configured, an area (sector) corresponding to data for which recording has failed and an area (sector) corresponding to discarded data are incomplete areas (sectors). Sector).

  However, even if such an incomplete sector is left unattended, in practice, there is no degradation of the video to the extent that is a problem. For example, if the buffer size is 4098 kb and a maximum of 128 ECC blocks (32 kb) can be stored, the maximum number of ECC blocks discarded at one time is 128. The data for 128 ECC blocks is only a video for 0.8 seconds in high-definition broadcasting. Even content conforming to MPEG1 is only a video for 1.8 seconds. That is, even if left unattended, no critical problem occurs.

  However, in the embodiment according to the recording system of the present invention, the supplement means receives the notification of the error information, and based on the error information, the area on the recording medium corresponding to the data that has failed to be recorded and the data that has been discarded. Complementary processing is performed. Therefore, it is possible to suitably record real-time content on the recording medium.

Here, “complementary processing” refers to a case where no processing is performed on the area of the recording medium corresponding to each of data that has failed to be recorded and discarded data (hereinafter referred to as “complementation target area” as appropriate). This concept includes all processes that improve the quality of the final data file. For example, the data file may be reduced by deleting the complement target area from the data file. Further, the data file may be divided with the complement target area as a boundary. Further, another area (null extent) in which nothing is recorded may be assigned to the complement target area. Alternatively, a data recovery buffer may be prepared, data that should have been recorded in the complement target area or data including them may be saved and recorded again in another area.
<Embodiment of Recording Method>
An embodiment according to the recording method of the present invention is a recording method for recording real-time content on a recording medium, and supplies data relating to the real-time content in association with a plurality of recording areas on the recording medium. A first supply step, a second supply step of supplying a command for instructing recording of each of the supplied data in association with each of the supplied data, and the supplied data Each of a first accumulation step of sequentially accumulating in the first buffer, a second accumulation step of sequentially accumulating the supplied command in the second buffer, and a plurality of commands accumulated in the second buffer A recording process for sequentially recording each of the plurality of data stored in the first buffer corresponding to the recording area corresponding to each of the plurality of recording areas. And when the recording fails for one of the plurality of accumulated data, at least one of the other data of the plurality of accumulated data and the command corresponding to the other data is A discarding step for discarding, a generating step for generating error information indicating that the recording has failed with respect to a recording area corresponding to each of the one data and the other data when the recording fails, and the generation A storage step for storing the error information, a notification step for notifying the stored error information at a predetermined timing, and the one data and the other data based on the error information for which the notification has been performed. A complementary process for performing a predetermined type of complementary process on the recording area corresponding to each of the recording areas, and the first supply process is a process of determining whether the recording has failed or not. Supplying the data on the relationship, the second supplying step supplies independently the command and whether the recording has failed.

  According to the embodiment of the recording method of the present invention, during the operation, the operation in each step corresponding to each means in the embodiment of the above-described recording system causes the recording medium to have the same effect as the above-described recording system. Real-time content can be suitably recorded on

  As described above, the embodiment according to the recording apparatus of the present invention includes the first buffer, the second buffer, the recording unit, the discarding unit, the generation unit, the storage unit, and the notification unit, and thus is suitable for the recording medium. In addition, real-time content can be recorded. Further, the embodiment of the recording system of the present invention includes a first supply unit, a second supply unit, a first buffer, a second buffer, a recording unit, a discard unit, a generation unit, a storage unit, a notification unit, In addition, since the supplement means is provided, it is possible to suitably record real-time content on the recording medium. Furthermore, the embodiment according to the recording method of the present invention includes a first supply step, a second supply step, a first accumulation step, a second accumulation step, a recording step, a discarding step, a generation step, a storage step, a notification. Since the process and the complementing process are provided, it is possible to suitably record the real-time content on the recording medium.

  These effects and other advantages of the present invention will become apparent from the embodiments described below.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
<Configuration of Example>
First, the configuration of a recording system according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of the recording system 10.

  The recording system 10 includes a host 100 and a recording device 200, and is a system configured to be able to record real-time content on the recording medium 20.

  The recording medium 20 is an optical information recording medium such as a DVD, for example.

  The host 100 is, for example, various computer systems such as a personal computer, a server device, or a workstation. The host 100 receives real-time content via a tuner (not shown) and records it on a recording medium via the recording device 200. It is configured to be possible. Note that a host program, which is one of the application programs, is running on the host 100, and when the host program is executed, the host 100 performs "host", "first supply means", " Each of the “second supply unit” and the “complementing unit” functions as an example.

  The recording device 200 includes a CPU (Central Processing Unit) 210, an interface 220, a command buffer 230, a data buffer 240, a data processing unit 250, a servo device 260, a pickup 270, and a memory 280.

  The CPU 210 is a control unit that controls the operation of the recording apparatus 200, and functions as an example of each of “discard means”, “generation means”, and “notification means” according to the present invention.

  The interface 220 is an interface for transmitting and receiving data to and from the host 100.

  The command buffer 230 is an example of a “second buffer” according to the present invention that can sequentially store write commands supplied from the host 100 in the order of supply.

  The data buffer 240 is an example of a “first buffer” according to the present invention configured to sequentially store data related to real-time content supplied from the host 100 via the interface 220. It has a data capacity of 128 ECC blocks (one ECC block corresponds to 16 sectors).

  The data processing unit 250 is a processing circuit that generates data to be supplied to the pickup 270 based on the data stored in the data buffer 240.

  The servo device 260 is a device for performing various servos such as a tracking servo, a focusing servo, a slider servo, and a spindle servo when the pickup 270 writes and reads data.

  The pickup 270 is an example of a “recording unit” according to the present invention configured to be able to write data to a recording medium in accordance with data supplied from the data processing unit 250.

  The memory 280 is a volatile memory configured to be able to store error information to be described later, and is an example of the “storage unit” according to the present invention.

  Details of the command buffer 230 and the data buffer 240 will be described with reference to FIG. FIG. 2 is a schematic diagram of the command buffer 230 and the data buffer 240.

  2, commands C001, C002,..., C128 are stored in the command buffer 230 in the order of supply from the host 100. Each of these is the above-described write command, and has a one-to-one correspondence with the ECC block stored in the data buffer 240. Each command is supplied including a sector address indicating a recording position on the recording medium 20 of the ECC block having a corresponding relationship.

  In the data buffer 240, ECC blocks B001, B002,..., B128 are stored in the order supplied from the host 100. These correspond one-to-one with the write commands stored in the command buffer 230, respectively. For example, the ECC block B001 is recorded in the sector on the recording medium 20 whose sector address is “xxx001” by the command C001. Since the ECC block is a data block for 16 sectors, the ECC block B001 is recorded over a recording area for 16 sectors from the sector having the address “xxx001”.

<Operation of Example>
Next, the operation of the recording system 10 having the above configuration will be described with reference to FIG. FIG. 3 is a flowchart of the real-time content recording operation in the recording system 10. In FIG. 3, the operations of the host 100 and the recording apparatus 200 are linked to each other. Therefore, in the following description, both operations will be described in a time-series manner.

  In FIG. 3, first, data is supplied from the host 100 to the recording apparatus 200 in units of ECC blocks (step A10). At the same time, a write command corresponding to the supplied data (ECC block) is also supplied.

  Each time the host 100 supplies one data block, the host 100 determines whether there is data to be supplied (step A11). In the present embodiment, data supplied from the host 100 is data having real-time properties related to real-time content (hereinafter referred to as “real-time data” as appropriate), and data to be sequentially supplied on the real-time axis is generated. Yes. When there is data (ECC block) to be supplied (step A11: YES), the host 100 repeats step A10 and continues supplying data to the recording apparatus 200.

  When there is no more data to be supplied (step A11: NO), the host 100 determines whether or not the recording of the last data related to the real-time content by the recording device 200 has ended (step A12). If the recording is not finished (step A12: NO), the host 100 waits until the recording is finished. The host 100 repeats the determination process according to a predetermined clock until receiving a recording end notification described later from the recording apparatus 200.

  On the other hand, in the recording apparatus 200, data supplied from the host 100 is sequentially stored and accumulated in the buffer (step B10). Here, the write command is stored in the command buffer 230, and the data to be recorded is stored in the data buffer 240, respectively.

  The CPU 210 of the recording device 200 determines whether there is data to be recorded in the data buffer 240 (step B11). When data exists in the data buffer 240 (step B11: YES), the CPU 210 records the data in a predetermined area (sector) of the recording medium 20 according to the corresponding write command (step B12). At this time, the CPU 210 controls the data processing unit 250 and the servo device 260 to perform recording on the recording medium 20 by operating the pickup 270. In addition, the CPU 110 refers to defect information (defect list (not shown)) recorded in a predetermined area of the recording medium 20 as appropriate, so that known defects (manufacturing defects, scratches, fingerprints, dirt, etc.) If there are secondary defects, data is recorded avoiding them. However, in this embodiment, it is assumed that there is no such known defect.

  The CPU 210 determines whether a recording error has occurred (step B13). Here, the recording error refers to a state in which data recording itself cannot be performed due to out of focus or tracking, and as a result of checking the error rate by reading the data once recorded. It is different from the resulting error. An example of the “detecting means” according to the present invention is configured by the CPU 210 that performs such determination.

  If no recording error has occurred (step B13: NO), the CPU 210 returns the process to step B11, determines whether or not there is data in the data buffer 240, and similarly records if there is data. . If there is no data in the data buffer 240 (step B11: NO), the CPU 110 transmits a recording end notification to the host 100 on the assumption that the recording of the data related to the real-time content has ended (step B18). Processing that occurs after transmission of the recording end notification will be described later.

  In the process of recording data on the recording medium 20, if a recording error occurs due to an unknown secondary defect or the like (step B13: YES), the CPU 210 is buffered in each of the command buffer 230 and the data buffer 240. All write commands and data are discarded (step B14), and the process proceeds to step B11.

  On the other hand, in parallel with this, the CPU 210 transmits delay error information to the host 100 (step B15). However, the transmission of this delay error information is uncertain as described above, and the host 100 continues to supply data according to a chronological order regardless of whether or not the delay error information is received. .

  Here, the discarding of data in the command buffer 230 and the data buffer 240 will be described in detail with reference to FIG. FIG. 4 is a schematic diagram of data discarding.

4, at time _{T A,} the command C007 to the command buffer 230, also the ECC block in the data buffer 240 (denoted in the figure as "blocks") B007 is accumulated. Furthermore, over time, at time _{T B,} the command buffer 230 a command C134 is, the data buffer 240 and the ECC block B134 is respectively accumulated. That is, at time _{T B,} the data buffer 240 is assumed to 128 ECC blocks are accumulated.

On the other hand, the recording device 200 is not necessarily running data supply time and the time difference of no data recorded from the host 100, for example, at time T _B described above, ECC block is supplied to the buffer for the first time the time T _A Attempt to execute recording of B007. However, if a sector on the recording medium 20 where the ECC block B007 is to be recorded (sector starting with the sector address “xxx097”) is damaged and a recording error occurs, the CPU 210 reads data currently buffered, that is, All the 127 data and commands from command C008 to command C134 and ECC block B008 to ECC block B134 are discarded. Since the command C007 is executed regardless of whether there is a recording error, it is deleted from the command buffer 230. Similarly, the ECC block B007 is erased from the buffer 230 because the recording to the recording medium 20 is executed regardless of whether there is a recording error.

  In this case, for example, even if the scratch is only in the sector represented by the sector address “xxx097”, 16 sectors from the sector represented by the sector address “xxx2129” in FIG. 4, that is, the sector address “xxx2144”. The sectors up to are sectors where no data is recorded (corresponding to “area where data is not normally recorded” in the figure). This area is a “complementation target area” that is a target of a complementing process described later.

  Returning to FIG. 3, when the delay error information is transmitted to the host 100, the CPU 210 generates error information (step B16). The error information generated here represents the recording area on the recording medium 20 where the data block where the recording error has occurred and the discarded data block were supposed to be recorded (that is, the complement target area), and This is information indicating that the recording error has occurred due to the fact of transmission or as its information content, and is an example of “error information” according to the present invention.

  Here, the configuration of the error information will be described with reference to FIG. FIG. 5 is a schematic diagram of the error information generated in step B16 in FIG.

  In FIG. 5, the error information includes three types of information: “number of blocks for which recording failed”, “start address of block for which recording failed”, and “number of blocks discarded”. Of course, the “number of blocks for which recording failed” is “1”, and the “start address of the block for which recording failed” is “xxx097”. “Number of discarded blocks” is “127”. That is, this error information indicates that 128 consecutive ECC blocks starting from the sector address “xxx097” are complementary areas where normal data recording has not been performed.

  Returning to FIG. 3 again, the generated error information is stored in the memory 280 (step B17). On the other hand, when the data in the buffer is discarded and the process returns to step B11, if there is data stored in the data buffer 240 at that time, recording on the recording medium 20 is performed again. At this time, referring to FIG. 4, since the data stored in the data buffer 240 at this time is real-time data continuing from “ECC block B135”, recording of this ECC block B135 is executed in step B12. Is done.

  If a recording error occurs again during recording of the ECC block B135, the data buffered at that time is discarded. Normally, it takes about 1 second to determine whether or not a recording error has occurred, and a considerable number (eg, 128) of ECC blocks are buffered during that period. Therefore, approximately 128 ECC blocks are discarded when a recording error occurs. This corresponds to 0.8 seconds for a high-definition broadcast program, and 1.8 seconds for a video based on MPEG1.

  In other words, in the recording system 10, when a recording error occurs, real-time content including an incomplete video of approximately several seconds corresponding to the recording error is sequentially recorded.

  On the other hand, when the recording of the data related to the real-time content is completed and the recording end notification is transmitted to the host 100 in step B18, the determination processing related to step A12 on the host 100 side, that is, the determination of whether the recording has ended The host 100 requests the recording apparatus 200 to notify the error information (step A13).

  In the recording apparatus 200 that has received the error information notification request, the CPU 210 determines whether the error information is stored in the memory 280 (step B19). When no error information is stored, that is, when the recording of data related to real-time content is all successful (step B19: NO), the operation in the host 100 ends, and the series of operations illustrated in FIG. 3 ends.

  On the other hand, when error information is stored in the memory 280 (step B19: YES), the CPU 210 transmits error information to the host 100 (step B20). In the host 100, this error information is acquired (step A14). Based on the acquired error information, the host 100 executes a complementing process as an example of the “complementing step” of the present invention (step A15). When the complementing process ends, the recording operation of the recording system 10 ends.

  Here, the supplementing process will be described with reference to FIG. FIG. 6 is a schematic diagram of the recording medium 20 before and after execution of the complementing process. 6 that are the same as those in FIG. 4 are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 6, the recorded real-time data file (that is, the real-time data file before complement processing) 21 includes a data group 310 corresponding to block B001 to block B006 and a data group 320 corresponding to block B135 and subsequent blocks. In addition, there is a complement target area 330 that is an area in which data is not normally recorded. Here, the host 100 executes the complementing process to replace the complementing target area 330 with a data unrecorded area (null extent) 340 at another location.

  Therefore, the real-time data file 22 after the complement processing is a data file in which data is arranged in the order of the data group 310, the unrecorded area 340, and the data group 320. When the real-time data file 22 is played back, an image in which the last frame of the data group 310 is frozen in the unrecorded area 340 is displayed. However, as described above, the time at which such a freeze occurs is approximately several seconds, and does not lead to quality degradation of real-time content.

  As described above, according to the recording system 10 according to the present embodiment, the recording apparatus 200 includes the memory 280, and error information indicating a complementation target area is stored when a recording error occurs. The host 100 can refer to the error information at an arbitrary timing (after the end of recording in the embodiment). Therefore, it is not necessary to execute a very heavy processing such as re-recording real-time data corresponding to the complement target area during real-time recording. Therefore, it is possible to suitably record real-time content.

  In addition, depending on the recording medium standard, if a recording error occurs during recording of real-time content, recording may stop. According to the recording apparatus and the recording system of the present invention, real-time content recording can be executed without any problem with image degradation of only a few seconds, which is clearly advantageous.

In the above-described embodiment, the complementary processing is performed. For example, even if no processing is performed on this area, the ratio of the area to the video is small as described above. There are no practical problems. In this case, at the time of reproduction of the region to be complemented, for example, some previously recorded video or other slightly disturbed video is displayed, but this is not a big problem.
<Modification>
In addition to the null content allocation as described above, several modes can be considered for the complement processing according to the above-described embodiment. Below, the other aspect of a complementation process is demonstrated as a modification of this invention.

<First Modification>
First, the supplementing process according to the first modification of the present invention will be described with reference to FIG. FIG. 7 is a schematic diagram of the recording medium 20 before and after execution of the complementing process. In the figure, the same parts as those in FIG.

  In FIG. 7, the complement target area 330 is deleted by the host 100, and the real time data file 22 after the complement processing is configured as a real time data file in which the data group 310 and the data group 320 are continuous in time series.

<Second Modification>
Next, the supplementing process according to the second modification of the present invention will be described with reference to FIG. FIG. 8 is a schematic diagram of the recording medium 20 before and after the execution of the complementing process. In the figure, the same parts as those in FIG.

  In FIG. 8, the complement target area 330 is deleted by the host 100, and further, two data files of the first real-time data file 23 and the second real-time data file 24 in which the data group 310 and the data group 320 are independent of each other. It is divided into.

  At this time, if there is an incomplete part in the first part of the second real-time data file 24, the part is cut off and configured as a normal data file. Here, the incomplete portion refers to a portion that is less than a data unit that must be recorded continuously in advance.

<Third Modification>
Next, the supplementing process according to the third modification of the present invention will be described with reference to FIG. FIG. 9 is a schematic diagram of the recording medium 20 before and after execution of the complement processing. In the figure, the same parts as those in FIG.

  In FIG. 9, the recording apparatus 200 includes a buffer 350 for error recovery. The buffer 350 stores real-time data for each data unit called CDA (continuous recording unit) that needs to be recorded continuously at least. Also, the buffer 350 always stores data corresponding to three CDAs in chronological order.

  In FIG. 9, when a recording error occurs during data recording and the complement target area extends over two CDAs, data corresponding to CDA (1) and CDA (2) including ECC blocks that are normally recorded are recorded. Discarded from the medium 20. When the complementing process is executed, the CDA (1) and CDA (2) in the buffer 350 are newly recorded in another area on the recording medium 20 and reconstructed as the real-time data file 22. According to this aspect, unless the capacity of the buffer 350 is basically exceeded, it is possible to correctly record a real-time file that has not been normally recorded.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the scope or spirit of the invention that can be read from the claims and the entire specification. A recording system and a recording method are also included in the technical scope of the present invention.

1 is a block diagram of a recording system according to an embodiment of the present invention. It is a schematic diagram of each buffer in the recording apparatus of the recording system of FIG. It is a flowchart of the real-time content recording operation | movement in the recording system of FIG. It is a schematic diagram of the data discard in the flowchart of FIG. FIG. 4 is a schematic diagram of error information in the flowchart of FIG. 3. It is a schematic diagram of the complementation process in the flowchart of FIG. It is a schematic diagram of the complementary process which concerns on the 1st modification of this invention. It is a schematic diagram of the complementary process which concerns on the 2nd modification of this invention. It is a schematic diagram of the complementary process which concerns on the 3rd modification of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Recording system, 20 ... Recording medium, 100 ... Host, 200 ... Recording device, 210 ... CPU, 220 ... Interface, 230 ... Command buffer, 240 ... Data buffer, 250 ... Data processing part, 260 ... Servo device, 270 ... pickup, 280 ... memory.

Claims (6)

Recording of data relating to real-time content sequentially supplied from a host in association with a plurality of recording areas on the recording medium from a host is associated with each of the supplied data and supplied. A recording device that performs according to commands sequentially supplied from the host to instruct recording of each data,
A first buffer for sequentially storing the supplied data;
A second buffer for sequentially storing the supplied commands;
Recording each of the plurality of data stored in the first buffer corresponding to each of the plurality of commands stored in the second buffer is a recording area corresponding to each of the plurality of recording areas Recording means for sequentially
If the recording of one of the plurality of accumulated data fails, discard at least one of the other data of the plurality of accumulated data and the command corresponding to the other data Destroying means,
Generating means for generating error information indicating that the recording has failed with respect to a recording area corresponding to each of the one data and the other data when the recording fails;
Storage means for storing the generated error information;
A recording apparatus comprising: notification means for notifying the host of the stored error information at a predetermined timing. Further comprising detecting means for detecting whether or not each of the recordings has failed for each recording area;
The discarding unit discards at least one of the other data and a command corresponding to the other data when the detection unit detects that the recording has failed,
The recording apparatus according to claim 1, wherein the generation unit generates the error information when the detection unit detects that the recording has failed. The host supplies data relating to the real-time content in units of predetermined blocks associated with addresses on the recording medium,
The first buffer stores the data in units of blocks,
The second buffer stores the command for each block unit,
The recording means records the data in the block unit,
The discarding unit discards at least one of the data and the command in units of the block,
The generating means includes at least (i) the address corresponding to the block in which the recording has failed, and (ii) the sum of the number of blocks in each of the block in which the recording has failed and the discarded block. The recording apparatus according to claim 1, wherein information is generated. 4. The recording apparatus according to claim 1, wherein the notification unit performs the notification when the host is requested to notify the error information as the predetermined timing. 5. A recording system for recording real-time content on a recording medium,
First supply means for supplying data relating to real-time content in association with a plurality of recording areas on the recording medium;
Second supply means for supplying a command for instructing recording of each of the supplied data in association with each of the supplied data;
A first buffer for sequentially storing the supplied data;
A second buffer for sequentially storing the supplied commands;
Recording each of the plurality of data stored in the first buffer corresponding to each of the plurality of commands stored in the second buffer is a recording area corresponding to each of the plurality of recording areas Recording means for sequentially
When the recording of one of the plurality of accumulated data fails, discard at least one of the other data and the command corresponding to the other data among the plurality of accumulated data Destruction means;
Generating means for generating error information indicating that the recording has failed with respect to a recording area corresponding to each of the one data and the other data when the recording fails;
Storage means for storing the generated error information;
Notification means for performing notification of the stored error information at a predetermined timing;
Complementing means for performing a predetermined type of supplement processing on the recording area corresponding to each of the one data and the other data based on the error information for which the notification has been made,
The first supply means supplies the data regardless of whether the recording has failed,
The recording system, wherein the second supply means supplies the command regardless of whether or not the recording has failed. A recording method for recording real-time content on a recording medium,
A first supply step of supplying data relating to real-time content in association with a plurality of recording areas on the recording medium;
A second supply step of supplying a command for instructing recording of each of the supplied data in association with each of the supplied data;
A first accumulation step of sequentially accumulating the supplied data in a first buffer;
A second accumulation step of sequentially accumulating the supplied command in a second buffer;
Recording each of the plurality of data stored in the first buffer corresponding to each of the plurality of commands stored in the second buffer is a recording area corresponding to each of the plurality of recording areas Recording process sequentially performed on
When the recording of one of the plurality of accumulated data fails, discard at least one of the other data and the command corresponding to the other data among the plurality of accumulated data A discarding process;
A generation step of generating error information indicating that the recording has failed with respect to a recording area corresponding to each of the one data and the other data when the recording fails;
A storage step of storing the generated error information;
A notification step of performing notification of the stored error information at a predetermined timing;
Based on the error information for which the notification has been made, and a complementing step of performing a predetermined type of complementing process on the recording area corresponding to each of the one data and the other data,
The first supply step supplies the data regardless of whether the recording has failed,
The recording method according to claim 2, wherein the second supply step supplies the command regardless of whether the recording has failed.

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