JP2010073231A - Video recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video recorder capable of immediately discriminating whether recording media are video recordable or not, without waiting for a completion of mounting process by starting a video recording of a stream during the mounting process of the recording media. <P>SOLUTION: The video recorder 10 mounted with a media M includes: a video recording controller 2 for video recording the stream inputted from a tuner 1 with respect to the media M; a media information acquisition means 9 for acquiring the media information from the media M and/or video recorder 10 when a power supply is turned off in a state that the mounting process of the media M is being normally finished; a media storage section 8 for storing the acquired media information; and a video recordable/unrecordable discrimination means 7 for discriminating whether the media M are video recordable or not, based on the media information stored in the media information storage section 8 when the video recording instruction is input to the media M before a power supply of next time is turned on and the mounting process is normally completed. The video recording controller 2 controls the video recording to the media M based on a discriminated result performed by the video recordable/unrecordable discrimination means 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording apparatus, and more particularly to a recording apparatus capable of recording on a portable recording medium such as an optical disk.

  In a recording apparatus that performs recording using an optical disk recording medium (hereinafter also simply referred to as a disk) such as a DVD or a BD (Blu-ray Disc), when the disk is placed on the disk tray of the recording apparatus and loaded. A confirmation process called mounting is executed.

  In this mounting process, the type of disc inserted into the recording device, the adjustment process according to the disc type, the disc logical information read processing from the disc, the title related information reading / confirmation processing on the disc, etc. Is done. In the adjustment process corresponding to the type of disk, for example, adjustment of servo systems such as focus servo, spin servo, tracking servo, and sled servo, tilt adjustment, and circumferential difference adjustment are performed. The disk logical information includes write strategy information that defines the wavelength of the laser beam of the optical pickup. Also, the title related information reading / confirmation process on the disc includes a folder structure confirmation, a title number confirmation, a free space confirmation process, and the like.

  When the disc is loaded, recording on the disc cannot be executed unless the mounting process is normally completed. The mounting process takes several tens of seconds to 1 minute or more. For example, a BD having a two-layer recording layer may require about one and a half minutes to complete the mounting.

In order to improve the operability of a recording apparatus capable of recording control with respect to a recording medium, for example, in Patent Document 1, when there is an instruction to record information on a memory card, a recording area in the disk apparatus And a recording apparatus that records information to be recorded in the recording area. As a result, the user does not care about the mounted state of the memory card, so that the operability is improved and the recorded information can be managed centrally in the disk device.
JP 2006-59098 A

  As described above, when recording on a disc with the recording device, there is a problem that even if the disc is inserted into the recording device, recording cannot be executed on the disc until the mounting is completed normally.

  On the other hand, if the recording device is provided with a semiconductor memory such as a DRAM and the semiconductor memory can temporarily store a stream input until the mounting process is normally completed, It is considered that recording can be started without waiting for the end of the mounting process.

  However, in the case of the above configuration, it is usually determined that reading of the disc is not completed, such as whether or not the inserted disc is recordable and what format (application format) the disc is compatible with. Can not do it. For this reason, when it is determined that the disk is not recordable when reading of the disk is completed after the start of recording, recording cannot be continued. Also, in the case of a recording device that supports recording in multiple formats according to the type of disc, the format set at the start of recording may differ from the format that can be recorded according to the disc. In this case, recording cannot be continued.

  From the user's perspective, although recording is started without waiting for the completion of the mounting process, it is not possible to record the disk until the mounting process is completed. In such a case, if the user does not notice that the recording cannot be performed on the disc after the start of recording, the recording of the stream will fail, and even if it is noticed, replace the disc with a recordable disc. After confirming and setting the recordable format, recording is started again, which takes extra time and places a heavy burden on the user.

  Further, as described above, when the recording apparatus can start recording without waiting for the end of the mounting process, the stream is encrypted and stored without using the media key during the mounting process, and the disk reading process is performed. After completion, the stored stream is re-encrypted using a media key and written to the disk. Accordingly, there has been a problem that the processing for recording a stream is complicated because encryption is performed twice, and reliability is lowered.

The present invention has been made in view of the above circumstances, and when recording on a portable recording medium, the recording of the stream is started during the mounting process of the recording medium, and the mounting process is completed. It is an object of the present invention to provide a recording apparatus that can immediately determine whether or not a recording medium can be recorded without waiting.
Also, to provide a recording device that enables recording on a recording medium without re-encrypting a stream input during the recording medium mounting process when recording on a portable recording medium. ,With the goal.

  In order to solve the above problems, the first technical means includes an input means for inputting a stream to be recorded and a portable recording medium, and the stream input from the input means to the recording medium. And a recording control means for recording, when the power is turned off in a state in which the mounting process for determining that the recording medium is recordable has been normally completed, / Or media information acquisition means for acquiring media information from the recording device, storage means for storing the media information acquired by the media information acquisition means, and before the mount process is normally completed after the power is turned on next time, When a recording instruction is input to the recording medium, whether or not the recording medium can be recorded is determined based on the media information stored in the storage unit. And a recording permission determination unit of the constant for the recording control means, based on a determination result of the recording permission determination unit, in which the control means controls the recording to the recording medium.

  The second technical means includes, in the first technical means, temporary storage means for temporarily storing a stream to be recorded, and the recording control means is determined to be recordable by the recording availability determination means. The stream input from the input unit is stored in the temporary storage unit, and after the mounting process is normally completed, the stream stored in the temporary storage unit is written into the recording medium, thereby Recording a stream and notifying that the recording medium is not recordable without storing the stream input from the input means in the temporary storage means when the recording availability judgment means judges that the recording is impossible. It is characterized by.

  A third technical means is the first or second technical means, wherein the media information includes presence / absence of the recording medium, physical type, application format, presence / absence of media protection, number of recorded titles, number of recorded chapters, It includes the remaining recording capacity, the time required for the previous reading, and the validity flag of the media information.

  According to a fourth technical means, in the third technical means, when the recording apparatus supports a plurality of application formats, and the media information includes an application format that can be recorded on the recording medium, the recording control means When the recording possibility determination unit determines that recording is possible, the application format that can be recorded on the recording medium is selected from the plurality of application formats and recording is started.

  The fifth technical means includes an input means for inputting a stream to be recorded, and a recording control means for recording a stream input from the input means to the recording medium by mounting a portable recording medium. When the power is turned off while the mounting process for determining that the recording medium can be recorded is normally completed, media information including a media key is acquired from the recording medium. Media information acquisition means, storage means for storing media information including the media key acquired by the media information acquisition means, and recording on the recording medium before the power supply is turned on next time and the mount process ends normally. When the instruction is input, the encryption key for encrypting the stream input from the input unit using the media key stored in the storage unit. And a temporary storage unit for temporarily storing the encrypted stream encrypted by the encryption unit, and the recording control unit stores the stream in the temporary storage unit after the mount process is normally completed. The encrypted stream is recorded in the recording medium without being re-encrypted, thereby recording the stream on the recording medium.

According to the present invention, when recording on a portable recording medium, whether or not recording of the recording medium can be performed immediately without starting the recording of the stream during the mounting process of the recording medium and waiting for the completion of the mounting process. Can be determined.
Further, when recording is performed on a portable recording medium, a stream input during the recording medium mounting process can be recorded on the recording medium without re-encryption.

  Hereinafter, preferred embodiments of a recording apparatus according to the present invention will be described with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a block diagram showing a configuration example of a recording apparatus according to the first embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a recording apparatus. The recording apparatus 10 can use the medium M as a portable recording medium. As the medium M, a recordable disk medium such as a DVD or a BD is applicable.

  The recording apparatus 10 receives a broadcast signal, selects a tuner, outputs a stream, a stream analysis / encryption unit 3 that analyzes and encrypts the stream output from the tuner 1, and a stream analysis The storage unit 5 as a temporary storage unit for temporarily recording the stream encrypted by the encryption unit 3, and the stream corresponding to the standard for each medium M with respect to the stream output from the storage unit 5 The stream re-encryption / writing means 6 for writing the stream to the medium M, the delay determining unit 4 for determining that the mounting process of the medium M has been normally completed, and the stream analyzing / encrypting means 3 A recording control unit 2 as a recording control unit for controlling a recording function including the delay determination unit 4 and the stream re-encryption / writing unit 6.

  The recording control unit 2, the stream analysis / encryption unit 3, the delay determination unit 4, and the stream re-encryption / write unit 6 are functional units realized by a control unit such as a CPU provided in the recording apparatus 10. A control unit such as a CPU reads out the above-described units and programs for realizing the respective units from a storage unit such as a memory and executes them, thereby enabling the processing according to the embodiment of the present invention.

  The stream input to the stream analysis / encryption means 3 is not limited to the stream selected by the tuner 1 but can be a stream input via an external device or a network. The part for inputting the stream including the tuner 1 corresponds to the input means of the present invention. As the storage unit 5, a dynamic random access memory (DRAM) or a flash memory that can read and write data at high speed can be used as a temporary storage unit.

  The stream analysis / encryption means 3 performs an encryption process on the stream stored in the storage unit 5. The encryption method is not particularly limited, and a known method can be used. The encryption process here is performed in order to maintain the security of the temporarily stored data in the storage unit 5, and the recording of the present invention is possible even if the storage unit 5 stores the data without performing the encryption process. It can function as an embodiment of the device 10.

  In the stream re-encryption / writing means 6, the stream stored in the storage unit 5 is encrypted according to the standard of the medium M (standard such as DVD or BD) and stored in the medium M. In addition, recording may be performed on the medium M without performing encryption according to the recording environment, recording conditions, standards to be observed, and the like.

  The operation example of the recording apparatus 10 shown in FIG. 1 will be described by taking a case where a DRAM is applied as the storage unit 5 as an example. The stream selected and output by the tuner 1 is input to the stream analysis / encryption means 3. In a state where recording cannot be performed directly on the medium M, for example, when the medium M is being mounted or the medium M is not attached to the recording device 10, the stream analysis / encryption means 3 The input stream is analyzed, encrypted, and recorded in the DRAM 5.

  When the medium M is attached to the recording apparatus 10, the recording apparatus 10 automatically starts the mount process. Here, for example, the medium M is mounted on the recording apparatus 10 by placing the medium M on a disk tray on which the medium M is loaded and loading the tray. As described above, the contents of the mount process are the process of discriminating the type of the disc inserted into the recording device, the adjustment process according to the disc type discriminated, the process of reading disc logical information from the disc, and the title related to the disc Information reading / confirmation processing is performed. In the adjustment process corresponding to the type of disk, for example, adjustment of servo systems such as focus servo, spin servo, tracking servo, and sled servo, tilt adjustment, and circumferential difference adjustment are performed. The disk logical information includes write strategy information that defines the wavelength of the laser beam of the optical pickup. Also, the title related information reading / confirmation process on the disc includes a folder structure confirmation, a title number confirmation, a free space confirmation process, and the like.

  Here, when the medium M is mounted on the recording apparatus 10 and the user inputs a recording start instruction during the mounting process, the stream analysis / encryption means 3 starts recording the encrypted stream to the DRAM 5. The At this time, the medium M itself is being mounted and is not ready for recording yet, but starts recording the input stream in response to an instruction to start recording and stores it in the storage unit 5.

  The delay determination unit 4 monitors whether or not the mounting process of the medium M has been normally completed. If the delay determination unit 4 determines that the mounting process of the medium M has been normally completed, the stream re-encryption / writing unit 6 The stream stored in the DRAM 5 is read, re-encrypted and written to the medium 10. At this time, the newly input stream continues to be stored in the DRAM 5, but since the writing from the DRAM 5 to the medium M is faster, the stream stored in the DRAM 5 eventually disappears. The stream output from the encoding unit 3 is re-encrypted by the stream re-encryption / writing unit 6 and recorded on the medium M without being temporarily stored in the DRAM 5.

  In addition, when recording is started in a state where the medium M is not mounted, when a recording start instruction is input, recording of the encrypted stream to the DRAM 5 is started by the stream analysis / encryption means 3 as described above. The After that, when the medium M is loaded and the mounting process is normally completed, the stream stored in the DRAM 5 is read by the stream re-encryption / writing means 6, re-encrypted and written to the medium M.

  In the stream re-encryption / writing means 6, another DRAM (or other DRAM) used as a work area when the stream read from the DRAM 5 or the stream output from the stream analysis / encryption means 3 is re-encrypted. Can be connected or built in.

  By configuring as described above, the user can start recording without waiting for the completion of the mounting process of the recording medium, as described above, whether or not the inserted disc can be recorded, There is a problem that it is impossible to determine which format (application format) the disc is compatible with unless the reading (mounting process) of the disc is completed.

  The recording apparatus 10 according to the present invention can solve the above problems. That is, the main feature of the present invention is that when recording is performed on a portable recording medium, the recording of the stream is started during the mounting process of the recording medium, and the recording is immediately performed without waiting for the completion of the mounting process. It is to determine whether or not recording of media is possible. As a configuration for this, when the power is turned off in a state where the mounting process for determining that the medium M can be recorded is normally completed, the recording apparatus 10 receives the recording from the medium M and / or the recording apparatus 10. The media information acquisition unit 9 for acquiring media information (see FIG. 2 described later), the media information storage unit 8 corresponding to the storage unit for storing the media information acquired by the media information acquisition unit 9, and the next power supply are turned on. When a recording instruction is input to the medium M before the mounting process is normally completed, a recording permission / non-permission determining unit 7 that determines whether or not the medium M can be recorded based on the media information stored in the media information storage unit 8. With. The recording control unit 2 controls recording on the medium M based on the determination result by the recording availability determination unit 7.

  Here, the medium M is mounted on the recording device 10 and the power is turned on / off (not the main power is turned on / off). The media M and the media information are in one-to-one correspondence, and one piece of media information is acquired and stored for one piece of media loaded in the recording apparatus 10.

  In the above, when the power of the recording device 10 is turned off, the media information acquisition unit 9 stores the media information of the media M in the media information storage unit 8. Thereafter, when the power is turned on again (with the medium M attached) and a recording instruction is given until the mounting process of the medium M is normally completed, the recording control unit 2 determines whether or not the recording is possible. In response to this, a request for determining whether recording is possible is made. In response to the recording availability determination request from the recording control unit 2, the recording availability determination unit 7 reads out the media information stored in the media information storage unit 8, and determines whether the recording of the medium M is possible based on the read-out media information. Then, the recording control unit 2 is notified of the recording availability determination result. Note that the media information storage unit 8 is composed of, for example, a non-volatile memory, and is accessible by the recording availability determination unit 7.

  The recording control unit 2 stores the input stream in the storage unit 5 when the medium M is determined to be a recordable disc based on the recording availability determination result from the recording availability determination unit 7, and the mount process ends normally. After that, the stream recorded on the medium M is recorded by writing the stream stored in the storage unit 5 to the medium M. On the other hand, if it is determined that the medium M is not a recordable disc based on the result of the recording possibility determination from the recording possibility determination means 7, the input stream is not stored in the storage unit 5 and an indication that recording on the medium M cannot be performed. Etc. to notify the user.

  When the recording apparatus 10 supports a plurality of application formats and the media information includes an application format that can be recorded on the medium M, the recording control unit 2 determines that recording is possible by the recording availability determination unit 7. Then, an application format that can be recorded on the medium M is selected from a plurality of application formats, and recording is started. The application format supported by the medium M can be acquired from the media information stored in the media information storage unit 8.

  FIG. 2 is a diagram for explaining an example of media information stored in the media information storage unit 8 and a method for determining whether or not recording is possible. As media information related to media, it was necessary to read / attach media (whether media is present), physical type, application format, media protection, number of recorded titles, number of recorded chapters, remaining recording capacity, last reading The validity flag of time and media information shall be included. As described above, the media information acquisition unit 9 acquires the media information from the media M or the recording device 10 and stores it in the media information storage unit 8 when the power is turned off in a state where the media M has been read. .

  In FIG. 2, as information indicating the presence / absence of media, if the media M is ejected from the recording apparatus 10 when the power is turned off, information indicating “no media” is stored in the media information storage unit 8. If the medium M is loaded when the power is turned off, information indicating “media present” is stored in the media information storage unit 8. When information indicating “no media” is read from the media information storage unit 8 when the power is turned on next time and recording is instructed, the recording possibility determination unit 7 determines that the medium M is not attached. It is determined that recording is impossible. The presence / absence of the medium M may be determined by detecting whether or not the medium M is mounted at the start of recording, for example, as well as the attachment / detachment state when the power is turned off.

  Further, as the physical type of the medium, the disk type of the medium M such as DVD-ROM, DVD-R / RW, BD-ROM, BD-R / RE, etc. is stored in the media information storage unit 8. When the next time the power is turned on and a recording instruction is given, if a read-only disc type such as “DVD-ROM” or “BD-ROM” is read from the media information storage unit 8, the recording availability determination means 7 It is determined that M is a reproduction-only disc, and it is determined that the medium M cannot be recorded.

  As application formats applicable to the media, application formats that can be recorded on the media M such as DVD-Video, DVD-VR, BD-MV, BD-AV, and AVCREC are stored in the media information storage unit 8. When a ROM format such as “DVD-Video” or “BD-MV” is read from the media information storage unit 8 when the power is turned on next time and recording is instructed, the recording availability determination means 7 It is determined that the format is not recordable, and it is determined that the medium M cannot be recorded.

  Further, as information indicating the presence / absence of media protection, if the media M is protected (write-inhibited), information indicating “protected” is stored in the media information storage unit 8, while the media M is protected. Otherwise, information indicating “no protection” is stored in the media information storage unit 8. When information indicating “protected” is read from the media information storage unit 8 when the next power is turned on and recording is instructed, the recording availability determination unit 7 determines that the media M is in a write-protected state. Thus, it is determined that the medium M cannot be recorded.

  As the number of titles recorded on the media, the number of titles recorded on the media M when the power is turned off is stored in the media information storage unit 8. When the “number of recorded titles” is read from the media information storage unit 8 when the power is turned on next time and the recording is instructed, the recording possibility determination unit 7 sets the “number of recorded titles” to a predetermined value (standard). It is determined whether or not it exceeds the upper limit value defined above, and if it exceeds, the medium M is determined to be unrecordable.

  Further, as the number of chapters recorded on the medium, the number of chapters recorded on the medium M when the power is turned off is stored in the media information storage unit 8. When “recorded chapter count” is read from the media information storage unit 8 when the power is turned on next time and recording is instructed, the recording possibility determination unit 7 sets the “recorded chapter count” to a predetermined value (standard). It is determined whether or not it exceeds the upper limit value defined above, and if it exceeds, the medium M is determined to be unrecordable.

  As the remaining recording capacity of the medium, the remaining recording capacity of the medium M is stored in the media information storage unit 8 when the power is turned off. When “recording remaining capacity” is read from the media information storage unit 8 when the power is turned on next time and recording is instructed, the recording possibility determination means 7 determines whether the “recording remaining capacity” exceeds a predetermined value. If it exceeds, the medium M is determined to be unrecordable.

  Further, as the time (previous reading time) required for the previous (most recent) reading of the media, the previous reading time of the media M is stored in the media information storage unit 8 when the power is turned off. When “previous reading time” is read from the media information storage unit 8 when the power is turned on next time and recording is instructed, the recording possibility determination means 7 determines whether the “previous reading time” exceeds a predetermined value. If it exceeds, the medium M is determined to be unrecordable. This is because if the time required for reading the medium M becomes longer, the amount of the stream stored in the storage unit 5 increases accordingly. If the time is too long, the stream cannot be stored in the storage unit 5 and recording fails. It will be. For this reason, when the “previous reading time” exceeds a predetermined value, the medium M cannot be recorded. This previous reading time is information managed on the recording apparatus 10 side.

  As the validity flag of the media information, if the media information is valid, the validity flag is stored in the media information storage unit 8 in the “valid” state, while if the media information is invalid, the validity flag is stored. The flag is “invalid” and stored in the media information storage unit 8. When the validity flag “invalid” is read from the media information storage unit 8 when the power is turned on next time and the recording is instructed, the recording availability determination unit 7 determines that the media information is invalid, It is determined that the medium M cannot be recorded. This validity flag is information managed on the recording apparatus 10 side.

  Here, the validity flag of the media information will be specifically described. Depending on the state of the medium M, recording may not be started before the reading of the medium M is completed. For example, after performing a process that involves writing to the medium M such as recording or editing, if the power is physically shut down in a state where the writing of management information to the medium M has not been completed, After the medium M is turned on and restored, the restoration process is performed and the management information is written. At this time, the time required for the repair process cannot be predicted, and the result of the repair process may be a medium that cannot be recorded. In such a case, recording may be started before the completion of reading the medium M. Can not. Here, the management information is information that is read / written (read / written) with respect to the medium M, and includes, for example, information such as a reproduction position necessary for reproducing recorded data.

  In order to deal with the above problem, an validity flag indicating the validity of the media information is stored in the media information storage unit 8. That is, when the media information is read from the media information storage unit 8 when the recording apparatus 10 is turned on, “invalid” is written in the validity flag of the media information storage unit 8. When the power is turned off, when the writing of management information to the medium M is completed, or when it is not necessary to write the management information to the medium M, information on whether or not recording is possible (that is, as shown in FIG. 2). Presence / absence of media, physical type, application format, presence / absence of media protection, number of recorded titles, number of chapters recorded, remaining recording capacity, time taken for the last reading, etc. “Write. Thus, only when the power is normally turned off and there is no inconsistency in the management information, “valid” is written in the validity flag. Therefore, the media information storage unit 8 with the validity flag in the “valid” state at the next power-on. Read from.

  FIG. 3 is a flowchart for explaining an example of a recording possibility determination method by the recording apparatus 10 of the present invention. This example will be described based on the apparatus configuration shown in FIG. First, when the recording apparatus 10 is turned on and a recording instruction is given until the mounting process is normally completed, the recording control unit 2 makes a recording availability determination request to the recording availability determination means 7. In response to the recording availability determination request from the recording control unit 2, the recording availability determination unit 7 reads the media information stored in the media information storage unit 8 (step S1), and records the media M based on the read media information. Judgment is made. As shown in FIG. 2, the media information includes the attached / detached state of media (the presence / absence of media), physical type, application format, presence / absence of media protection, the number of recorded titles, the number of recorded chapters, the remaining recording It shall include the capacity, the time required for the previous reading, and the validity flag of the media information.

  When determining whether or not recording of the medium M is possible based on the media information, the recording possibility determination unit 7 determines whether or not the validity flag of the media information is “valid” (step S2), and the validity flag is determined. If it is determined that it is not “valid” (in the case of NO), it is determined that recording is not possible for the medium M (step S12). If it is determined in step S2 that the validity flag is “valid” (in the case of YES), it is determined whether or not the medium M is present (whether or not it is attached) (step S3).

  Next, when it is determined in step S3 that the medium M does not exist (NO), the recording possibility determination unit 7 proceeds to step S12 and determines that recording is impossible. If it is determined that the medium M exists (YES), it is determined whether the physical type of the medium M is recordable (step S4).

  Next, when it is determined in step S4 that the physical type of the medium M is not recordable (in the case of NO), the recording possibility determination unit 7 proceeds to step S12 and determines that recording is impossible. If it is determined that the physical type of the medium M is recordable (YES), it is determined whether the application format of the medium M is recordable (step S5).

  Next, when it is determined in step S5 that the application format of the medium M is not recordable (in the case of NO), the recording possibility determination unit 7 proceeds to step S12 and determines that recording is impossible. When it is determined that the application format of the medium M is recordable (in the case of YES), it is determined whether or not the medium M has disk protection (step S6).

  Next, when it is determined in step S6 that the medium M is disk-protected (in the case of NO), the recording possibility determination unit 7 proceeds to step S12 and determines that recording is impossible. If it is determined that the medium M is not disk-protected (in the case of YES), it is determined whether or not the number of recorded titles on the medium M has reached the upper limit of the standard (step S7). Note that the standard upper limit of the number of titles varies depending on the application format.

  Next, when it is determined in step S7 that the number of recorded titles on the medium M has reached the upper limit of the standard (NO), the recording possibility determination unit 7 proceeds to step S12 and determines that recording is impossible. . If it is determined that the number of recorded titles on the medium M has not reached the upper limit of the standard (in the case of YES), it is determined whether or not the number of recorded chapters on the medium M has reached the upper limit of the standard (step). S8). The standard upper limit value of the number of chapters varies depending on the application format.

  Next, when it is determined in step S8 that the number of recorded chapters of the medium M has reached the upper limit of the standard (NO), the recording possibility determination unit 7 proceeds to step S12 and determines that recording is impossible. . If it is determined that the number of recorded chapters on the medium M has not reached the upper limit of the standard (in the case of YES), it is determined whether or not the remaining recording capacity of the medium M is equal to or greater than a predetermined value (step S9).

  Next, when it is determined in step S9 that the remaining recording capacity of the medium M is less than the predetermined value (in the case of NO), the recording possibility determination unit 7 proceeds to step S12 and determines that recording is impossible. If it is determined that the remaining recording capacity of the medium M is greater than or equal to a predetermined value (in the case of YES), it is determined whether or not the time taken to read the medium M last time is equal to or smaller than a predetermined value (step S10).

  Next, when it is determined in step S10 that the time taken to read the medium M last time is longer than a predetermined value (NO), the recording possibility determination unit 7 proceeds to step S12 and determines that recording is impossible. Further, when it is determined that the time taken to read the medium M last time is equal to or less than a predetermined value (in the case of YES), it is determined that recording is possible for the medium M (step S11).

  In FIG. 3, the order of the recording possibility determination process is not limited to the above flow, but the determination process of the number of recorded titles and the number of recorded chapters (steps S7 and S8) is always an application format determination process. This must be done after (Step S5). This is because the upper limit value of the standard of the number of titles and the number of chapters differs depending on the application format. If the application format is known, the upper limit value of the standard can be determined. For this reason, after the application format is acquired, the above determination processing is performed on the number of titles and the number of chapters.

As described above, according to the present embodiment, when recording start is instructed before completion of the mounting process in a state where a recording medium that cannot be recorded is inserted, the user is immediately notified by an indication that recording cannot be performed on the recording medium. Can be notified.
Further, when the recording apparatus supports a plurality of formats (application formats), recording can be automatically started in a format corresponding to the inserted recording medium.
In addition, since it can be determined whether or not the recording medium can be recorded before the mounting process is completed, it is not necessary to perform useless recording operations on the recording medium that cannot be recorded, and the frequency of use of the memory for temporarily storing the stream before the mounting process is completed It is possible to extend the life by lowering. Further, since it is not necessary to perform a useless recording operation in the recording apparatus, power consumption can be reduced.

(Second Embodiment)
FIG. 4 is a block diagram showing a configuration example of the recording apparatus 10 according to the second embodiment of the present invention. The recording apparatus 10 of the present embodiment includes a tuner 1, a recording control unit 2, a stream analysis / encryption unit 3, a delay determination unit 4, a storage unit 5, a stream writing unit 6 ', a recording availability determination unit 7, and a media information storage. Unit 8 and media information acquisition means 9. In the present embodiment, a stream writing means 6 'is provided instead of the stream re-encryption / writing means 6 in the first embodiment, and other parts are the same as those in the first embodiment.

  As described in the first embodiment, in order to encrypt the stream and record it on the medium M, the recording apparatus 10 performs encryption without using a media key on the stream during the reading process of the medium M. After being stored in the storage unit 5 and read processing of the medium M, the stream of the storage unit 5 is re-encrypted using the media key and written to the medium M. Therefore, the process for recording the stream for performing the encryption twice is complicated, and the reliability is lowered.

  In the present embodiment, in order to solve the above-described problem, when recording is performed on a portable recording medium, the stream input during the mounting process of the recording medium is not re-encrypted. Enable recording on recording media. Specifically, when the media information acquisition unit 9 is turned off in a state where the mounting process of the media M has been normally completed, the media information (from the above-described FIG. 2) is received from the media M and / or the recording device 10. Is obtained from the medium M and stored in the media information storage unit 8.

  When a recording instruction is input to the medium M before the power is turned on next time and the mounting process is normally completed, the stream analysis / encryption means 3 (corresponding to the encryption means) 8 reads the media key of the media M, encrypts the stream using this media key, and stores it in the storage unit 5 (corresponding to a temporary storage means). When the mounting process is normally completed, the stream writing unit 6 ′ reads the encrypted stream from the storage unit 5 and writes the encrypted stream on the medium M without re-encrypting. Thus, by storing the media key in advance, this stream can be encrypted with the media key when the stream is stored in the storage unit 5 during the mounting process. For this reason, when the stream stored in the storage unit 5 is recorded on the medium M, it is not necessary to re-encrypt with the media key, and only the stream is transferred.

  According to the present embodiment, since it is not necessary to perform the encryption process twice, it is possible to simplify the process when recording the stream and improve the reliability.

It is a block diagram which shows the structural example of the video recording apparatus which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating an example of the media information memorize | stored in a media information storage part, and the determination method of the recording availability by this. It is a flowchart for demonstrating an example of the recording availability determination method by the video recording apparatus of this invention. It is a block diagram which shows the structural example of the video recording apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tuner, 2 ... Recording control part, 3 ... Stream analysis and encryption means, 4 ... Delay determination part, 5 ... Accumulation part, 6 ... Stream re-encryption / write means, 6 '... Stream write means, 7 ... Recording availability determination unit, 8... Media information storage unit, 9... Media information acquisition unit, 10.

Claims (5)

A recording apparatus comprising: input means for inputting a stream to be recorded; and recording control means for recording a stream input from the input means to the recording medium by attaching a portable recording medium,
Media information acquisition means for acquiring media information from the recording medium and / or the recording device when the power is turned off in a state where the mounting process for determining that the recording medium is recordable has been completed normally When,
Storage means for storing the media information acquired by the media information acquisition means;
If a recording instruction is input to the recording medium before the power is turned on next time and the mounting process ends normally, it is determined whether or not the recording medium can be recorded based on the media information stored in the storage means. And a recording availability determination means for
The recording apparatus, wherein the recording control unit controls recording on the recording medium based on a determination result by the recording availability determination unit. The recording apparatus according to claim 1, further comprising temporary storage means for temporarily storing a stream to be recorded.
The recording control unit stores the stream input from the input unit in the temporary storage unit when the recording availability determination unit determines that the recording is possible, and the temporary storage unit after the mount process is normally completed By writing the stream stored in the recording medium into the recording medium, the stream is recorded on the recording medium. When the recording availability determination unit determines that the recording is impossible, the stream input from the input unit is stored in the temporary storage unit. A recording apparatus that is not stored and notifies that the recording medium is not recordable.   3. The recording apparatus according to claim 1, wherein the media information includes presence / absence of the recording medium, physical type, application format, presence / absence of media protection, number of recorded titles, number of recorded chapters, remaining recording capacity, last time A recording apparatus comprising: a time required to read the media information; and a validity flag of the media information.   4. The recording apparatus according to claim 3, wherein when the recording apparatus supports a plurality of application formats and the media information includes an application format that can be recorded on the recording medium, the recording control unit determines whether the recording is possible. A recording apparatus comprising: selecting an application format that can be recorded on the recording medium from the plurality of application formats and starting recording when the determination unit determines that recording is possible. A recording apparatus comprising: input means for inputting a stream to be recorded; and recording control means for recording a stream input from the input means to the recording medium by attaching a portable recording medium,
Media information acquisition means for acquiring media information including a media key from the recording medium when the power is turned off in a state where the mounting process for determining that the recording medium is recordable has been completed normally;
Storage means for storing media information including the media key acquired by the media information acquisition means;
If a recording instruction is input to the recording medium before the power is turned on next time and the mounting process ends normally, the stream input from the input unit is stored using the media key stored in the storage unit. Encryption means for encryption;
Temporary storage means for temporarily storing the encrypted stream encrypted by the encryption means,
The recording control unit records the stream on the recording medium by writing the encrypted stream stored in the temporary storage unit to the recording medium without re-encrypting after the mounting process is normally completed. A recording apparatus characterized by that.

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