JP2007200524A - Recording device, data management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device in which a storage region of a storage medium can be efficiently utilized in accordance with importance of contents data, and a data management system constituted by the recording device. <P>SOLUTION: A recording and reproducing device 1 calculates elapsed days from recording contents data for a HDD 26, and judges whether contents data in which the calculated elapsed days coincides with a plurality of preset judgment days exists or not. And when it is judged that the contents data in which the elapsed days coincides with respective judgment days exists, reduction of data quantity in a reproducible range by compression processing is performed for contents data being coincident with a first judgment day in which data compression is set as processing to be executed, and contents data being coincident with a second judgment day in which erasing of data is set as processing to be executed is erased. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording apparatus that records content data on a storage medium and a data management system that includes the recording apparatus.

  Conventionally, a program provided by television broadcasting or the like (that is, content data having video data and audio data) is recorded on a storage medium such as a hard disk drive (hereinafter also referred to as HDD) or a DVD-RW, and the recorded content An apparatus configured to be able to reproduce data is known.

  In recent years, the capacity of a storage medium such as an HDD has been increased, and in a recording / reproducing apparatus equipped with such a storage medium, a user can play many programs without worrying about the storage capacity. Can be recorded.

However, since the recording capacity of the storage medium is finite, it is still required to efficiently use the recording area. Therefore, for example, when content data is recorded on a storage medium, the content data is recorded as data that is divided into a basic part and an extended part and is encoded in a scalable manner. It is configured to detect the remaining capacity of the medium, and when the detected remaining capacity is equal to or less than a predetermined amount, erase the extended portion of the already recorded content data to reduce the data amount of the content data A recording / reproducing apparatus has been proposed (see, for example, Patent Document 1).
JP 2002-184102 A

  However, in the proposed recording / reproducing apparatus, if the remaining capacity of the storage medium exceeds a predetermined value, for example, even if it is new content data recorded immediately before, the extended portion is erased, Only the basic part is recorded because the extended part is erased from the newly recorded content data.

  In other words, regardless of the age of the content data, only the basic part of the content data is recorded in the storage area, and the efficient use of the storage area according to the importance of the content data is not performed. was there.

  The present invention has been made in view of these problems, and provides a recording apparatus that can efficiently use a storage area of a storage medium in accordance with the importance of content data, and a data management system configured by such a recording apparatus. The purpose is to do.

The invention according to claim 1, which has been made to achieve the object,
A recording apparatus comprising recording means for acquiring content data including at least one of an image and sound and recording the content data in a first storage medium,
Clocking means for clocking an elapsed time from the time of recording the content data in the first storage medium;
Elapsed time determination means for determining whether or not the elapsed time measured by the timing means has exceeded a preset first determination time;
When the elapsed time determining means determines that the elapsed time has exceeded the first determination time, the first determination time has been exceeded based on a reduction ratio set in advance corresponding to the first determination time. A data amount reducing means for reducing the data amount of the determined content data within a reproducible range of the content data;
It is provided with.

  As described above, in the recording apparatus of the present invention, the time measuring means measures the elapsed time from the time when the content data is recorded on the first storage medium, and the elapsed time determining means measures the elapsed time measured by the time measuring means. It is determined whether or not a first determination time set in advance has been exceeded. When the elapsed time determination means determines that the elapsed time has exceeded the first determination time, the data amount reduction means determines the first determination time based on the reduction ratio set in advance corresponding to the first determination time. The amount of content data determined to exceed the limit is reduced within a range in which the content data can be reproduced.

  Therefore, according to the recording apparatus of the present invention, the data amount of the content data whose elapsed time from the recording has exceeded the first determination time is reproduced based on the reduction ratio set in advance corresponding to the first determination time. Since it is reduced as much as possible, the old content data exceeding the first determination time is recorded with the data amount reduced in the first storage medium, and the new content data remains in the data amount at the time of recording. It is recorded. Therefore, it is possible to efficiently use the storage area of the storage medium according to the oldness and newness of the content data, that is, the importance of the content data.

  Next, according to a second aspect of the present invention, in the recording apparatus according to the first aspect, the elapsed time determining means determines whether or not the elapsed time exceeds the first determination time, Whether or not the second determination time set longer than the determination time has been exceeded is determined, and when the elapsed time determination means determines that the elapsed time has exceeded the second determination time, the data erasure means However, the content data determined to have exceeded the second determination time is erased.

  Therefore, according to the recording apparatus of the second aspect, the content data whose elapsed time from the recording time exceeds the second determination time set longer than the first determination time is erased. Therefore, it is possible to prevent the storage area of the first storage medium from being occupied by older content data exceeding the limit, and it is possible to save the user from having to erase the content data himself.

  Next, according to a third aspect of the present invention, in the recording apparatus according to the first or second aspect, a plurality of first determination times are set, and each reduction ratio with respect to each first determination time is equal to the first The determination time is set to increase as the determination time increases.

  Therefore, according to the recording device of the third aspect, when the elapsed time from the time of recording the content data exceeds each of the plurality of first determination times set, the reduction set for each first determination time Since the data amount of the content data is reduced based on the ratio, it is possible to increase the data amount to be reduced step by step with time and to reduce the data amount of the content data.

  Next, the recording apparatus according to any one of claims 1 to 3, as set forth in claim 4, sets at least one of the first determination time or the reduction ratio for each type of content data. The data amount reducing means may be configured to identify the type of content data and reduce the data amount based on the first determination time and the reduction ratio corresponding to the identified type.

  According to the recording apparatus of the fourth aspect configured as described above, the amount of content data is reduced based on the first determination time and the reduction rate set for each type. It is possible to efficiently use the storage area of the storage medium in accordance with the importance based on it.

  For example, when the content data is moving image information extracted from a television broadcast signal, the first determination time is set longer for a type such as a movie or drama and shorter for a type such as news or weather forecast. So, if the content data is a movie or drama, it will be recorded in a form that can be viewed well without reducing the amount of data for a long time, and if the old information is useless news and weather forecasts, it will take a short time Since the amount of data is reduced, the recording area can be used efficiently.

  Also, for example, a content rate data is set by setting a reduction rate of 20% as a reduction rate for a category such as a movie or drama, and setting a reduction rate of 50% as a reduction rate for a category such as news or weather forecast Is the video information for movies and dramas, the quality of the content is ensured, and the amount of data for video information for news and weather forecasts that can be reduced may be recorded. The area can be used efficiently. Note that the reduction rate here refers to the ratio between the amount of data when first recorded in the first storage medium and the amount of data to be reduced.

  On the other hand, in the recording apparatus according to any one of claims 1 to 4, the first determination time setting unit sets the first determination time based on an input from the outside, as described in claim 5. In this way, the user can easily set the first determination time via the operation unit or the like.

  Moreover, the recording apparatus according to any one of claims 1 to 5 is configured such that the reduction ratio setting means sets the reduction ratio based on an input from the outside, as described in claim 6. In this case, the user can easily set the reduction ratio via the operation unit or the like.

  Furthermore, the recording apparatus according to any one of claims 1 to 6 is provided in addition to the case where the data amount reducing unit determines that the elapsed time exceeds the first determination time, as described in claim 7. When the reduction command for reducing the data amount of the content data is input from the outside, the data amount of the content data recorded on the first storage medium may be reduced.

  According to the recording apparatus of claim 7 configured as described above, the user inputs the data amount reduction command via the operation unit or the like, thereby reducing the data amount of the content data recorded in the first storage medium. It can be easily reduced.

  According to a seventh aspect of the present invention, as in the eighth aspect, the display control means for displaying the reduction ratio of the content data recorded in the first storage medium on the display means, and the display control means includes the reduction ratio. When a change command for changing the reduction rate is input from the outside while the is displayed, the reduction rate display is changed based on the input change command, and the reduction rate is changed from the display after the change. A reduction ratio specifying means to be identified, and if the reduction ratio is specified by the reduction ratio specifying means, a data reduction amount is specified by the data amount reducing means based on the specified reduction ratio. You may comprise so that may be reduced.

  In this way, the user can easily specify the reduction rate by changing the display of the reduction rate displayed on the display device, and can reduce the amount of data at the specified reduction rate. it can.

  On the other hand, the recording device according to any one of claims 1 to 8 is characterized in that, as described in claim 9, the recording means uses content data acquired from outside as a basic part as data necessary for reproduction. The content data is recorded by dividing into a plurality of hierarchies having an extended portion for improving the accuracy and content of the data, and the data amount reducing means erases a part of the extended portion data based on the reduction ratio. The data amount may be reduced.

  For example, the data amount reduction means may read the content data from the first storage medium and execute a well-known data compression process to reduce the data amount of the content data. Since the data amount can be reduced simply by erasing the data in the extended portion, the data amount can be reduced in a short time.

  A tenth aspect of the present invention is the recording apparatus according to any one of the second to ninth aspects, wherein a communication means for communicating with an external device and a history storage for recording a communication history are provided. And when the elapsed time determining means determines that the elapsed time has exceeded the second determination time, the data erasing means reads content data determined to have exceeded the second determination time from the first storage medium. The identification information of the read content data is recorded in the history storage means as a communication history, and the content data is transmitted to the external device through the communication means as storage data and recorded, and after the transmission, the content data is stored in the first storage medium. It is characterized by erasing from.

  According to the recording apparatus of claim 10 configured as described above, since the content data is deleted when the elapsed time exceeds the second determination time, the storage medium is stored with the old content data exceeding the second determination time. This storage area can be prevented from being occupied, and the content data can be recorded in an external device.

  According to a tenth aspect of the present invention, as in the eleventh aspect, when a content data reproduction command is input from the outside, the reproduction means is based on the communication history stored in the history storage means. It is determined whether or not the content data that has received the reproduction command is transmitted to the external device, and when the content data is transmitted to the external device, a data acquisition command is transmitted to the external device via the communication unit. If the content data is acquired and reproduced by the above and the content data is not transmitted to the external device, the content data that has received the reproduction command may be read from the first storage medium and reproduced.

  In this way, content data that has been erased from the storage medium beyond the second determination time out of the content data recorded on the first storage medium based on the user's recording command is also acquired from the external device. Thus, it is possible to reproduce according to the user's reproduction command.

  On the other hand, the invention according to claim 12 is the recording apparatus according to claim 9, comprising a communication means for communicating with an external device, and a history storage means for recording a communication history, and a data amount The reduction means reads the data of the extension part from the first storage medium, records the identification information of the read data of the extension part in the history storage means as a communication history, and transmits it as storage data to the external device via the communication means The extended portion data is erased from the first storage medium after transmission.

  Therefore, according to the recording device of the twelfth aspect, when the elapsed time exceeds the first determination time, the data amount of the content data is reduced. Therefore, the old content data exceeding the first determination time is stored in the storage medium. The area can be prevented from being occupied, and the data of the extended portion can be recorded in the external device.

  Further, according to the twelfth aspect of the present invention, when a content data reproduction command is input from the outside as in the thirteenth aspect, the reproduction means is based on the communication history recorded in the history storage means. It is determined whether or not the data of the extended portion of the content data that has received the reproduction command is transmitted to the external device. When the data of the extended portion is transmitted to the external device, the data is transmitted to the external device via the communication means. The extension part data is acquired by sending a data acquisition command, and the content data is reproduced with the acquired extension part data and the basic part data stored in the first storage medium. In a case where it has not been transmitted to the device, the content data that has received the reproduction command may be read from the first storage medium and reproduced.

  In this way, since it is possible to acquire the extended portion data that has been erased from the first storage medium beyond the first determination time, the content data can be obtained by using the extended portion data and the basic portion data. It is possible to restore and reproduce the state when it was first recorded on the first storage medium.

  According to a fourteenth aspect of the present invention, in the recording apparatus according to any one of the second to ninth aspects, the second storage medium provided separately from the first storage medium communicates with an external device. And a history storage means for recording the erasure history. The recording means acquires the preset content data and records it in the second storage medium, and also based on an external command. The content data specified in the above is acquired and recorded in the first storage medium, and when the elapsed time determining means determines that the elapsed time has exceeded the second determination time, the data erasing means has exceeded the second determination time. The identification information of the determined content data is recorded in the history storage means, and the content data is erased from the first storage medium.

  In addition, when the data acquisition command is received from the external device via the communication unit, the data transmission unit receives the requested content data from the content data recorded on the second storage medium based on the received data acquisition command. When the content data playback command is input from the outside, the playback unit outputs the playback command based on the identification information recorded in the history storage unit. It is determined whether the received content data is stored in the first storage medium or the second storage medium. If the content data is stored in any storage medium, the content data is stored in any storage medium. If the content data is not stored in any storage medium, a data acquisition command is transmitted to a preset external device. It makes obtains and reproduces the content data.

  Therefore, according to the recording device of the fourteenth aspect, since the content data is deleted when the elapsed time exceeds the second determination time, the storage of the first storage medium by the old content data exceeding the second determination time. An area can be prevented from being occupied, and content data that has been erased from the storage medium beyond the second determination time can also be obtained from the second storage medium or an external device, so that a user's reproduction command can be obtained. In response, the content data can be reproduced.

  On the other hand, the invention according to claim 15 is a data management system comprising the recording device according to claim 11 or claim 13 and a management device for managing storage data transmitted from the recording device, In the management device, when the storage data is received from the recording device, the storage data storage unit records the storage data in the management-side storage unit, and when the data acquisition command is received from the recording device, the storage data transmission unit is Based on the data acquisition command, the storage data recorded in the management storage unit is extracted, and the extracted storage data is transmitted to the recording device.

  Therefore, according to the data management system of the fifteenth aspect, the storage data that cannot be recorded in the first storage medium of the recording apparatus can be recorded in the management-side storage means of the management apparatus. The storage data can be taken out from the management side storage means as required. For this reason, the user views the content data whose elapsed time from the recording has exceeded the second determination time and has been erased from the first storage medium, or the content data whose data amount has been reduced, It can be restored to the initial recording state for viewing.

  Further, in the invention described in claim 15, as described in claim 16, when a plurality of recording devices are provided and the management device receives the storage data, the storage data storage means receives the management-side storage means. It is determined whether the same storage data as the storage data is recorded, and when the same storage data is not recorded, the received storage data may be recorded in the management-side storage unit, In this way, since the same storage data is not stored in the management-side storage means, the storage area of the management-side storage means can be used effectively.

  On the other hand, the invention described in claim 17 is a data management system provided with a plurality of recording devices according to claim 14, wherein the plurality of recording devices distributes obtainable content data to each second storage medium. It is configured to record. Then, the reproducing means of each recording device, when content data is not stored in either the first storage medium or the second storage medium, is based on the identification information of other recording devices belonging to the data management system. One of them is selected, and content data is acquired from the selected recording device.

  In the data management system configured as described above, content data that can be acquired by a plurality of recording devices (for example, content data of all channels obtained by receiving TV broadcast signals) is distributed among the recording devices. Since recording is performed on the second storage medium, each recording device stores predetermined content data (for example, content data of a predetermined channel).

  Therefore, it is possible to acquire content data deleted from the first storage medium from one of the second storage medium or the second storage medium of another recording apparatus in one recording apparatus belonging to the data management system. The content data once recorded can be shared between the recording devices.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
A data management system according to the first embodiment including a plurality of recording / playback apparatuses 1 and servers 60 will be described. FIG. 1 is a configuration diagram showing a schematic configuration of the entire data management system, and the internal configuration of the recording / reproducing apparatus 1 is shown in a block diagram.

  The recording / reproducing apparatus 1 of the first embodiment extracts designated program data (hereinafter also referred to as content data) from a digital television broadcast signal (hereinafter also referred to as broadcast signal) received by an antenna, and extracts a hard disk 26 (hereinafter referred to as content data). , Which is also referred to as HDD 26), and the content data recorded in HDD 26 is read and reproduced by an external command. Tuner 10, demodulator 12, decoder 14, image output unit 16, audio output unit 18, an encoder 20, a disk drive 24, a hard disk 26, a communication unit 28, an operation unit 30, a control unit 40, and a bus line for connecting the above units.

  The tuner unit 10 selects a predetermined broadcast signal from the broadcast signal received via the antenna based on a command from the control unit 40, and performs amplification processing or the like on the selected signal to perform transmission path coding. The signal is extracted and input to the demodulator 12.

  The demodulating unit 12 demodulates the transmission path coded signal extracted by the tuner unit 10, extracts a transport stream (hereinafter also referred to as “TS”) defined in MPEG2-System, for example, and inputs it to the decoder 14. To do. Note that the TS is a video TS packet including video data, an audio TS packet including audio data, a system information TS packet including information on a television broadcast system broadcast (for example, information for data broadcast, EPG information), etc. Are configured to be multiplexed.

  The decoder 14 demultiplexes the TS extracted by the demodulator 12 and separates each packet encoded by the MPEG2 system. Then, in accordance with the MPEG2 system, each packet is decompressed to obtain reproduction data such as video data and audio data from the video TS packet and audio TS packet, and system information related to the reproduction data from the system information TS packet. To extract. Then, video data obtained from the video TS packet is input to the image output unit 16, and audio data obtained from the audio TS packet is input to the audio output unit 18.

  The decoder 14 is configured to decode the content data processed by the encoder 20 and extract video data, audio data, system information, and the like. The extracted video data and audio data are respectively Input to the image output unit 16 or the audio output unit 18.

  The image output unit 16 is connected to a display device 50 such as a TV monitor and causes the display device 50 to output input video data. The audio output unit 18 is connected to the speaker 52 and causes the input audio data to be output from the speaker 52.

  The encoder 20 performs processing for compressing the input content data at a compression rate specified by the control unit 40. The content data compression method executed by the encoder 20 may be any method as long as it can be compressed to a predetermined compression rate, and various methods are used as well-known techniques for data compression. Details of the compression process will be omitted.

  Upon receiving a command from the control unit 40, the disk drive 24 reads content data recorded on the HDD 26 from the HDD 26 and records content data on the HDD 26. The HDD 26 is a randomly accessible mass storage medium in which various data such as content data is recorded.

  The communication unit 28 includes various information necessary for communicating with the server 60, and is configured to be able to communicate with the server 60 including the database 61 as a large-capacity storage medium via the Internet 2. Yes.

  The operation unit 30 includes various operation keys 32 provided in the recording / reproducing apparatus 1 and a remote control sensor 34 that receives a transmission signal from a remote controller (hereinafter also referred to as a remote controller) 36. By operating the key 32 or the remote controller 36, various commands are input to the control unit 40 via the operation unit 30.

  The control unit 40 includes a well-known microcomputer including a CPU 42, a RAM 44, a ROM 46, a rewritable EEPROM 48, and the like, and the CPU 42 executes programs stored in the ROM 46, whereby each unit of the recording / reproducing apparatus 1 described above. To control.

  Then, for example, by inputting a channel selection command of the selected channel via the operation unit 30 to the tuner unit 10, the content data of the selected channel is acquired from the received broadcast signal, and the image output unit 16 and the audio A process of outputting from the display device 50 and the speaker 52 via the output unit 18, a recording process of recording the acquired content data in the HDD 26, and a playback process of reading and playing the content data recorded in the HDD 26 are executed.

  Further, various processes such as a recording data management process for reducing the data amount of each content data recorded in the HDD 26 or erasing the content data are executed every preset management time.

The EEPROM 48 stores various data (registered data, management data, etc. described later) used when the CPU 42 executes the program.
On the other hand, the server 60 includes a control unit including a CPU, a RAM, a ROM, and the like, and a communication unit for connecting to the Internet 2, and is connected to a database 61 as a mass storage medium.

Hereinafter, various processes executed by the control unit 40 of the recording / reproducing apparatus 1 will be described in order.
In the recording / reproducing apparatus 1 of the present embodiment, the main routine shown in FIG. 2 is executed by inputting a command by operating the operation unit 30 or by inputting a command from the outside via the communication unit 28. The And based on the command input from the operation unit 30 during execution of the main routine, various processes described in detail later are executed.

Hereinafter, the main routine executed by the control unit 40 will be described with reference to FIG. FIG. 2 is a flowchart showing a main routine executed by the CPU 42.
When the process starts, first, in S110, it is determined whether or not the input command is a content data recording command. If it is determined that the recording command is input (S110: YES), the process proceeds to S115. When a recording process to be described later is executed and the recording process is terminated, the process proceeds to S120. On the other hand, if it is not a recording command (S110: NO), the process proceeds to S120.

  Next, in S120, it is determined whether or not the input command is a content data playback command. If it is determined that the playback command has been input (S120: YES), the process proceeds to S125, and a playback process to be described later is executed. When the reproduction process is completed, the process proceeds to S130. On the other hand, if it is not a regeneration command (S120: NO), the process proceeds to S130.

  In S130, it is determined whether or not the input command is a management data change command for changing management data representing detailed information of the content data recorded in the HDD 26, and the management data change command is input. If it is determined (S130: YES), the process proceeds to S135, a compression rate changing process described later is executed, and when the compression rate changing process is completed, the process proceeds to S140. On the other hand, if it is not the management data change command (S130: NO), the process proceeds to S140.

  Next, in S140, it is determined whether or not the input command is a registration data change command for changing registered data including information used when reducing the data amount of content data recorded in the HDD 26. If it is determined that a registration data change command has been input (S140: NO), the process proceeds to S145, a registration data update process described later is executed, and when the registration data update process ends, the process ends. On the other hand, if it is not a registered data change command (S140: NO), the process proceeds to S150.

  Next, in S150, when it is determined that the input command is another command in which processing content is stored in advance, for example, a command related to recording reservation of content data or other various setting changes (S150: YES). ), The process proceeds to S155, the process is executed in accordance with the command, and the process ends. On the other hand, if the command does not store the processing content (S150: NO), the processing is terminated as it is.

  Next, the recording process executed in S115 of the main routine will be described with reference to FIGS. FIG. 3 is a flowchart showing a recording process executed by the control unit 40, and FIG. 4 is an example of a recorded data list generated based on the management data and displayed on the display device 50. Here, the recording data list is a list of management information of all content data recorded in the HDD 26.

  When the process is started, the recording start time is stored in the EEPROM 48 as a part of the management data in S210. Here, the recording start time is, for example, the current time when the recording command is input. In subsequent S215, recording of content data extracted from the broadcast signal of the channel selected by the operation unit 30 (that is, each packet obtained by demultiplexing the TS) to the HDD 26 is started. In S220, It is determined whether a recording end command is input. In S220, when it is determined that the recording end command is not input (S220: NO), the recording of the content data is continued until the recording end command is input. On the other hand, if it is determined that a recording end command has been input (S220: YES), the process proceeds to S225.

  In S225, EPG data encoded together with the recorded content data is read from the decoder 14, and in subsequent S230, the recorded content data is divided for each genre based on the genre information included in the EPG data, and the process proceeds to S235. To do. That is, for example, when a weather forecast is included in the middle of a movie, it is divided into three files: a first half of the movie, a weather forecast, and a second half of the movie.

  In S235, the file name of the recorded content data is set. In this embodiment, as shown in the recording file name in FIG. 4, the file name is set by the recording date and time, the file number, and the recording channel. Note that the file number is 1 when the content data is not divided, and when the content data is divided, the file number is assigned in an appropriately divided number.

  Next, in S240, based on the EPG data and the recording start time saved in S210, the recording start time, recording channel, genre, address indicating the position recorded in the HDD 26 (start address, end address), compression rate (this The data location (HDD at this time) is stored in the EEPROM 48 in association with each file name, and the processing is terminated.

  Also, here, only the case where content data is recorded based on a command input from the outside via the operation unit 30 has been described. However, when content data is recorded based on preset reservation information. The same processing is performed.

  Next, the registration data update process executed in S145 of the main routine will be described with reference to FIGS. FIG. 5 is a flowchart showing registration data update processing executed by the control unit 40, and FIG. 6 is an example of a genre-specific processing list generated based on the registration data and displayed on the display device 50.

  When the processing is started, the registered data stored in the EEPROM 48 is read in S310, and the genre-specific processing list shown in FIG. 6 is displayed on the display device 50 based on the registered data in S315. Here, the registration data is data in which processing to be performed for each of a plurality of determination dates set in advance is defined for each genre of content data. In the recording data management processing described later, the registration data is based on the registration data. The processing for each content data is executed. The genre-specific processing list is a list in which processing to be performed on a predetermined determination date is displayed for each genre of content data.

  In the present embodiment, as shown in FIG. 6, weather forecast, news report, variety, music, drama, documentary, movie, and the like are set as examples of genres. Further, as the determination date, 1, 3, 6, 10, 14, and 28 are set as the number of days that have passed since the date when the content data was recorded. Note that these genres and determination dates are examples, and can be changed as appropriate by an operation by the operation unit 30.

  For each genre, a process to be performed is set corresponding to each determination date. In the present embodiment, as an executable process, compression at a predetermined compression rate, deletion, and storage in the server 60 are performed. Or none (-) is set. For example, in FIG. 6, in the case of a weather forecast, the content data is set to be compressed at a compression rate of 50% one day after the recording date, and is set to be deleted after three days. For example, in the case of a drama, it is set to compress at a compression rate of 80% after 6 days from the recording date and to compress at a compression rate of 50% after 10 days. Since the drama is not set to be erased, the drama remains recorded in the HDD 26 unless the user himself erases it by an input from the operation unit 30. The documentary and movie 28 days later are set to be stored in the database 61 of the server 60 via the Internet 2.

  In the present embodiment, (the amount of content data after compression) / (the amount of content data when first recorded in the HDD 26) is described as the compression rate, and the compression rate is set in advance. It is configured such that it can be selected from a plurality of types of compression rates (for example, compression rate 80%, compression rate 50%, compression rate 30%, compression rate 10%, compression rate 5%, etc.).

  When the process of S315 is completed, next, in S320, it is determined whether an item (for example, 10 days after the report) or a determination date for changing the process is selected from the genre-specific process list via the operation unit 30. If it is determined that the item or determination date is selected (S320: YES), the process proceeds to S325.

  In step S325, when an item is selected, a list of processes that can be changed (for example, deletion, compression rate 80%, compression rate 50%, DB storage, processing) is displayed on the processing list displayed on the display device 50. Display none). When the determination date is selected, a list of the number of days that can be changed is displayed on the processing list.

  Next, in subsequent S330, it is determined whether or not a predetermined process or number of days has been selected from the process list or the number of days list via the operation unit 30, and if it is determined that the process or the number of days has been selected ( (S330: YES), the process proceeds to S335, the changeable process list or the number of days list is deleted, the registered data is updated with the selected process or the number of days, and the process proceeds to S340. On the other hand, if it is determined that the process is not selected (S330: NO), the process of S330 is repeatedly executed until it is selected.

  Next, in S340, the genre-specific processing list displayed on the display device 50 is updated with the updated registration data, and the process proceeds to S345. If it is determined in S320 that no item is selected (S320: NO), the process proceeds to S345.

  Then, in S345, it is determined whether or not a registration data change completion command has been input via the operation unit 30, and if the completion command has not been input (S345: NO), the process proceeds to S320. The processing from S320 is repeatedly executed, and when a completion command is input (S345: YES), the processing ends.

  Next, a recorded data management process for reducing the amount of content data recorded in the HDD 26 in this way will be described with reference to FIG. FIG. 7 is a flowchart showing a recorded data management process executed by the control unit 40.

  The recorded data management process is started at a preset time (for example, 5:00 am). When the process is started, recording of each content data stored in the registration data is started in S405. The elapsed time from the recording date is calculated by reading the time, and in the subsequent S410, the calculated elapsed day is the determination date set in the registration data (in this embodiment, 1, 3, 6, 10, 14, 28). Judgment is made whether there is content data that matches (day).

  If it is determined that there is content data that matches the determination date (S410: YES), the process proceeds to S415, and the content data determined to match the determination date in S410 is registered data. It is determined whether or not there is one corresponding to the genre for which processing is set on the determination date. For example, if there is content data whose elapsed days correspond to one of the determination dates (for example, 3 days), the genre (shown in FIG. 6) is set to perform processing on the determination date (3 days). In the case of the example, it is determined whether there is content data corresponding to weather forecast, news report, variety, music).

  When it is determined that there is content data corresponding to the genre (hereinafter also referred to as target data) (S415: YES), the process proceeds to S420, and it is determined whether the set processing is compression of the content data. To do. If it is determined that the content data is compressed (S420: YES), the process proceeds to S425 to execute a recorded data compression process to be described later. When the recorded data compression process is completed, the process proceeds to S480. On the other hand, if it is determined that the content data is not compressed (S420: NO), the process proceeds to S430.

  Next, in S430, it is determined whether or not the set process is to store the content data in the server 60. If it is determined that the content data is stored (S430: YES), the process proceeds to S435, the recording / reproducing apparatus 1 is connected to the Internet 2 via the communication unit 28, and the target data is transferred to the HDD 26 in the subsequent S440. In S445, the read target data is transmitted to the server 60 together with identification information (for example, recording file name) indicating the details (recording date and time, recording channel) of the target data and a recording command, and the process proceeds to S450.

  In S450, it is determined whether or not the recording completion information is received from the server 60. If it is determined that the recording completion information is not received (S450: NO), the process of S450 is repeated until it is received. On the other hand, when the recording completion information is received (S450: YES), the process proceeds to S455, the Internet connection is disconnected, and in subsequent S460, the target data is erased from the HDD 26, and the process proceeds to S465. In S465, the data location included in the management data of the target data is changed from the HDD to the server (DB), and the process proceeds to S480.

  On the other hand, if it is determined in S430 that the set process is not storage of content data (S430: NO), the process proceeds to S470, and the target data is determined to be content data erasure. In step S475, the management data of the target data is deleted, and the process proceeds to step S480.

  Next, in S480, it is determined whether or not the processing after S420 has been executed for all target data. If it is determined that the processing has not been executed (S480: NO), the processing proceeds to S420. For other target data, the processing from S420 is executed. On the other hand, when it is determined that the process has been executed for all target data (S480: YES), the process ends.

  If it is determined in S410 that there is no content data matching the determination date (S410: NO), and if it is determined in S415 that there is no content data corresponding to the genre (S415: NO), End the process.

  Next, the recorded data compression process executed in S425 of the recorded data management process will be described with reference to FIG. FIG. 8 is a flowchart showing the recorded data compression process executed by the control unit 40.

  When the process is started, it is first determined in S500 whether or not the recording data management process is being performed. If it is determined that the recording data management process is being performed (S500: YES), the process proceeds to S505. The compression rate designated by the registration data is designated to the encoder 20. On the other hand, if it is determined that the recording management process is not being performed (S500: NO), it is determined that the content data compression process is based on a command input via the operation unit 30, and the process proceeds to S510 to manage the management data. The compression rate is read and designated to the encoder 20, and the process proceeds to S515.

Next, in S515, the target data is read from the HDD 26. In the subsequent S520, the read target data is input to the encoder 20, and the process proceeds to S525.
In S525, it is determined whether or not the compression process by the encoder 20 has ended. If it is determined that the compression process has not ended (S525: NO), the determination in S525 is repeated, and the compression process ends. If it is determined that it has been performed (S525: YES), the process proceeds to S530, and the compressed target data is recorded in the HDD. Next, in S535, the address (start address, end address) stored in the HDD 26 as the management data of the target data is updated, and if the compression processing is performed based on the compression rate of the registered data, the compression rate is set. Update and end the process.

Next, the reproduction process executed in S125 of the main routine will be described with reference to FIG. FIG. 9 is a flowchart showing the reproduction process executed by the control unit 40.
When the process is started, first, management data is read in S610, and in subsequent S615, a recorded data list as shown in FIG. 4 is displayed on the display device 50, and the process proceeds to S620. In the recorded data list, information on all content data recorded in the HDD 26 or the server 60 is displayed. The content data information includes a recording file name, recording start time, recording channel, genre, elapsed days since recording, compression rate, recording destination address in the HDD 26, data location, and the like. Is calculated based on the recording start time and the current time at the time of display.

  In S620, it is determined whether or not specific content data is selected on the recording data list via the operation unit 30, and if it is determined that it is not selected (S620: NO), the process of S620 is repeatedly executed. When it is determined that it has been selected (S620: YES), the process proceeds to S625. In S625, based on the data location included in the management data, it is determined whether or not the selected content data is recorded in the HDD.

  If it is determined in S625 that the content data is not recorded in the HDD 26 (S625: NO), the process proceeds to S630, and a screen for selecting whether to acquire the content data from the server 60 is displayed on the display device 50. indicate. In S635, it is determined whether or not an acquisition command is input to acquire content data from the server 60 via the operation unit 30, and when the acquisition command is input (S635: YES), the process proceeds to S640. , Connected to the Internet 2 via the communication unit 28, and in subsequent S645, the requested content data acquisition command is sent to the identification information (eg, recording file name) indicating the details (recording date and time, recording channel) of the content data. ) To the server 60, and the process proceeds to S650.

  Next, in S650, it is determined whether the requested content data is received via the communication unit 28. If the content data is received (S650: YES), the process proceeds to S655, and the received content data In the subsequent S660, the address (start address, end address) stored in the HDD 26 as the management data of the recorded content data is updated, and the location of the data is updated from the DB to the HDD. The process proceeds to S665. In step S665, the recorded content data is input to the decoder 14 and output via the image output unit 16 and the audio output unit 18, and the process ends.

  On the other hand, if it is determined in S625 that the content data is recorded in the HDD 26 (S625: YES), the process proceeds to S670, where the content data recorded in the HDD 26 is read out and input to the decoder 14 to display the image. It outputs via the output part 16 and the audio | voice output part 18, and the said process is complete | finished. In S635, if it is determined that the content data acquisition command from the server 60 is not input (S635: NO), the process is terminated as it is.

  On the other hand, if it is determined in S650 that the content data has not been received (S650: NO), the process proceeds to S675 and a predetermined time set in advance after transmitting the content data acquisition command to the server 60. If it is determined whether the predetermined time has not elapsed (S675: NO), the process proceeds to S650. On the other hand, if the predetermined time has elapsed (S675: YES), the process proceeds to S680, and the content data cannot be acquired from the server 60, and a message indicating that the content data cannot be acquired (for example, “acquire data from the server”). Cannot be displayed "on the display device 50, and the process is terminated.

  Next, the compression rate changing process executed in S135 of the main routine will be described with reference to FIGS. FIG. 10 is a flowchart illustrating compression rate change processing executed by the control unit 40, and FIG. 11 is an explanatory diagram illustrating an example of a content data compression rate change screen.

  When the processing is started, first, management data stored in the EEPROM 48 is read in S710, and a recording data list shown in FIG. 4 is displayed on the display device 50 so that the compression rate can be selected in S715.

  Next, in S720, whether or not a display instruction for a graph screen representing the compression rate of each content data is input via the operation unit 30 with the elapsed time (days) on the horizontal axis and the compression rate (%) on the vertical axis. If it is determined that it has not been input (S720: NO), the process proceeds to S725 to determine whether or not a specific content data compression rate has been selected from the recorded data list. If it is determined that the compression rate has been selected (S725: YES), the process proceeds to S730, and a list of compression rates that can be changed (for example, compression rate 80%, compression rate 50) is displayed on the processing list displayed on the display device 50. %, Compression rate 30%, compression rate 10%, etc.).

  In subsequent S735, it is determined whether or not a specific compression rate has been selected from the list of compression rates via the operation unit 30, and if it is determined that a compression rate has been selected (S735: YES), S740. , The list of compression ratios is deleted, the management data is updated at the selected compression ratio, and the process proceeds to S745. In S745, the compression rate of the recorded data list displayed on the display device 50 is updated with the updated management data, and the process proceeds to S775.

  On the other hand, if it is determined in S725 that the compression rate to be changed is not selected (S725: NO), or if it is determined in S735 that the compression rate is not selected from the list (S735: NO), S775 is performed. Migrate to

  In S720, when it is determined that a display instruction for the graph screen is input via the operation unit 30 (S720: YES), the process proceeds to S750, and the graph screen 70 illustrated in FIG. indicate. The graph screen 70 includes a compression rate display unit 71, an elapsed day change operation unit 78, and a compression rate change operation unit 76. A cursor 72 that can be moved by operating the operation unit 30 is also displayed. ing.

  In the compression rate display area 71, the horizontal bar 73 displays each content data from the right to the left in order from the new content data. Note that the length of the horizontal bar 73 indicates the amount of data.

  The elapsed day change operation section 78 displays a day setting tab 74 that can be moved in the left-right direction by operating the cursor 72 and operating it. The user moves the day setting tab 74 via the operation section 30. If it is arranged at the predetermined position, it is determined that the compression ratio of the predetermined content data is selected from the arranged position, the display color of the horizontal bar 73 is changed (the horizontal bar 73a after the change), and A content display 75 including the number of days elapsed since the recording of the content data, the recording date and time, and the genre is displayed in the vicinity of the horizontal bar 73a. FIG. 11 shows a state in which content data of a variety program that has passed two days from the time of recording is selected.

  On the other hand, the compression rate change operation unit 76 displays a compression rate change tab 77 that can be moved downward by operating the cursor 72 together. The compression rate change tab is displayed by the user via the operation unit 30. When 77 is moved and arranged at a predetermined position, the horizontal bar 73a whose display color is being changed is moved to the position (height) where the compression rate changing tab 77 is arranged. FIG. 11 shows a state where a compression rate of 50% is selected.

  In step S755, it is determined whether or not the movement of the day setting tab 74 or the compression rate change tab 77 is instructed via the operation unit 30, that is, whether or not a command for changing the compression rate of predetermined content data is input. If it is determined that it has been input (S755: YES), the process proceeds to S760, and the number of days setting tab 74, compression rate changing tab 77, and horizontal bar 73 are moved based on the command input from the operation unit 30. In addition, the display color of the horizontal bar 73 is changed, the content display 75 is displayed, and the process proceeds to S765.

  Subsequently, in S765, the compression rate of the predetermined content data selected by the operation unit 30 is read from the position of the horizontal bar 73a whose display color is being changed, the management data is updated with the read compression rate, and the flow proceeds to S770. Transition. On the other hand, if it is determined in S755 that the change command has not been input (S755: NO), the process proceeds to S770.

  In S770, it is determined whether or not a command to erase the graph screen has been input. If it is determined that a command to erase the graph screen has not been input (S770: NO), the process proceeds to S755, and from S755, Repeat the process. On the other hand, if it is determined in S770 that an instruction to erase the graph screen has been input (S770: YES), the process proceeds to S775.

  Next, in S775, it is determined whether or not a compression rate change completion command has been input. If it is determined that a change completion command has not been input (S775: NO), the process proceeds to S720, and processing from S720 is performed. Repeatedly. On the other hand, if it is determined that a change completion command has been input (S775: YES), the process proceeds to S780, and the above-described recording data compression processing is performed based on the updated management data, that is, the updated compression rate. Execute. Then, when the recorded data compression process is finished, the process is finished.

  Next, data recording processing executed by the server 60 of the first embodiment will be described with reference to FIG. FIG. 12 is a flowchart showing a data recording process executed by the control unit of the server 60.

  The data recording process is a process that starts when a command is input via the communication unit 28. When the process is started, in S910, it is determined whether or not the input command is a recording command. If it is a recording command (S910: YES), the process proceeds to S915, the identification information (for example, recording file name) of the content data received together with the recording command is read, and the process proceeds to S920.

  In S920, it is determined whether content data that matches the received content data is recorded in the database 61 based on the read identification information. If it is determined that the content data is not recorded (S920: NO). , The process proceeds to S925, the content data is recorded in the database 61, and the process proceeds to S930. On the other hand, if it is determined in S910 that the command is not a recording command (S910: NO), if it is determined in S920 that content data matching the database 61 is recorded (S920: YES), the process proceeds to S930. To do.

  In S930, it is determined whether or not the input command is a content data acquisition command. If it is determined that the command is a content data acquisition command (S930: YES), the process proceeds to S935 and is received together with the data acquisition command. Based on the identified information, the requested content data is read from the database 61, and in the subsequent S940, the read content data is transmitted to the recording / reproducing apparatus 1 that is the transmission source of the data acquisition command, and the process is terminated. On the other hand, if it is determined in S930 that the instruction is not a content data acquisition command (S930: NO), the process is terminated as it is.

  As described above, in the recording / reproducing apparatus 1 of the first embodiment, the control unit 40 calculates the number of days elapsed since the content data was recorded on the HDD 26, and the calculated number of elapsed days is a plurality of preset values. It is determined whether there is content data that matches the determination date. When it is determined that there is content data whose elapsed days match each determination date, content data that matches a determination date (hereinafter also referred to as a first determination date) for which data compression is set as a process to be executed. Thus, the content data that matches the determination date (hereinafter also referred to as the second determination date) in which the data amount is reduced within the reproducible range by the compression processing and data erasure is set as the processing to be executed is to erase.

  Therefore, according to the recording / reproducing apparatus 1 of the present embodiment, the data amount of the content data whose elapsed days match the first determination date is reproduced based on the compression rate set in advance corresponding to the first determination date. Since the content is reduced as much as possible, the old content data exceeding the first determination date is recorded in the HDD 26 in a state where the data amount is reduced, and the new content data is recorded with the data amount at the time of the first recording. Has been. Therefore, the storage area of the HDD 26 can be efficiently used according to the oldness and newness of the content data, that is, the importance of the content data.

  Further, since the content data whose elapsed days from the recording have exceeded the second determination date set longer than the first determination date is erased, the storage area of the HDD 26 is saved by the older content data exceeding the second determination date. Occupancy can be prevented, and the user can save time and effort to erase the content data.

  In addition, since a plurality of first determination dates are set, and the compression rate for each first determination date is set to increase as the determination date becomes longer, the number of days that have elapsed since the recording of the content data However, when each of the first determination dates set in plural is exceeded, the data amount of the content data is reduced based on the compression rate set for each first determination date. The amount of data to be reduced can be increased, and the amount of content data can be reduced.

  Furthermore, the first determination date and the compression rate are set for each genre of content data, and the content data is compressed based on the genre of the content data identified from the EPG data at the first determination date and the compression rate of the genre. Thus, the storage area of the HDD 26 can be efficiently used in correspondence with the importance based on the genre of the content data.

  Then, registration data including information such as a determination date and processing to be executed can be displayed on the display device 50 as a genre-specific processing list, and the genre-specific processing list is determined according to a command input from the operation unit 30. Since the update is made possible, the user can easily change the timing for compressing the content data, the timing for deleting the content data, the compression rate, etc. for each genre according to his / her preference.

  Furthermore, management data consisting of detailed information of the content data actually recorded in the HDD 26 can be displayed on the display device 50 as a recorded data list, and the compression rate displayed in the recorded data list can be changed from the operation unit 30. Since it can be updated in accordance with the input command, the user can easily change the compression rate and reduce the data amount of the specified content data with the desired compression rate.

  Further, since the compression rate of the content data recorded in the HDD 26 can be displayed on the graph screen corresponding to the elapsed days by the operation from the operation unit 30, the reduction state of the data amount of each content data can be seen at a glance. Can be recognized. Further, since the compression rate is changed by moving the horizontal bar 73 indicating the compression rate on the graph screen via the operation unit 30, the user can change the compression rate with a very simple operation.

  In addition, the recording / reproducing apparatus 1 includes a communication unit 28 for communicating with the server 60. When the number of elapsed days matches the second determination date, the content data that matches the second determination date is read from the HDD 26, and the EEPROM 48 In the management data stored in the file, the location of the read content data is updated from the HDD to the database, and the content data is transmitted to the server 60 via the communication unit 28 to be recorded. I try to erase it.

  When a content data reproduction command is input via the operation unit 30, it is determined whether or not the content data that has received the reproduction command is transmitted to the server 60 based on the management data stored in the EEPROM 48. When the content data is transmitted to the server 60, the content data is acquired and reproduced by transmitting a data acquisition command to the server 60 via the communication unit 28, and the content data is transmitted to the server 60. If there is not, the content data that has received the reproduction command is read from the HDD 26 and reproduced.

  On the other hand, when the server 60 receives the content data from the recording / reproducing device 1, the server 60 records the content data in the database 61. When the server 60 receives the data acquisition command from the recording / reproducing device 1, the server 60 records the content data in the database 61 based on the data acquisition command. The content data is extracted, and the extracted content data is transmitted to the recording / reproducing apparatus 1.

  Therefore, according to the data management system of the present embodiment, content data that cannot be recorded by the HDD 26 of the recording / reproducing apparatus 1 can be recorded in the database 61 of the server 60, and the recording / reproducing apparatus 1 can Content data can be extracted from the database 61. For this reason, the user can view the content data that has been deleted from the HDD 26 because the number of days elapsed since the recording has exceeded the second determination date.

  Further, the data management system of the present embodiment includes a plurality of recording / playback apparatuses 1. When the management apparatus receives the content data, it determines whether or not the same content data as the received content data is recorded in the database 61. If the same content data is not recorded, the received content data is recorded in the database 61. Therefore, the same content data is not recorded in the plurality of databases 61, and the storage area of the database 61 is saved. Can be used effectively.

  In the first embodiment, the recording / reproducing apparatus 1 corresponds to the recording apparatus of the present invention, the server 60 corresponds to the management apparatus, the HDD 26 corresponds to the first storage medium of the present invention, and the determination date is the present invention. It corresponds to the first determination time and the second determination time, the compression rate corresponds to the reduction ratio of the present invention, the genre corresponds to the type of content data, the communication unit 28 corresponds to the communication means of the present invention, and the EEPROM 48 It corresponds to the history storage means of the present invention, the database 61 corresponds to the management-side storage means, and the recording command corresponds to the recording command of the present invention.

The recording process corresponds to the recording means of the present invention, the process of S405 corresponds to the timing means of the present invention, the process of S410 corresponds to the elapsed time determining means of the present invention, and the recorded data compression process corresponds to the present invention. It corresponds to the data amount reducing means, the processing of S440 to S475 corresponds to the data erasing means of the present invention, the registered data update processing corresponds to the first determination time setting means and the reduction ratio setting means of the present invention, S730 and S750. Is equivalent to the display control means of the present invention, the processes of S735 to S745 and S755 to S765 are equivalent to the reduction rate specifying means of the present invention, the reproduction process is equivalent to the reproduction means of the present invention, and S910 to S925. The processing corresponds to the storage data storage means of the present invention, and the processing of S930 to S940 corresponds to the storage data transmission processing of the present invention.
[Modification of First Embodiment]
Next, as a modification of the first embodiment, when content data is recorded on the HDD 26, a basic part as content data necessary for reproducing the content data, and an extended part for improving the accuracy of the data, An example in which the divided content data is encoded (so-called scalable encoding) and recorded in the HDD 26 will be described below. Since the recording / reproducing apparatus 1 of the modified example is configured in substantially the same manner as the recording / reproducing apparatus of the first embodiment, in the following description, only different parts from the first embodiment will be described, and similar parts will be described. Description of is omitted.

  The encoder 20 re-encodes the video data, audio data, system information, etc. extracted by the decoder 14. More specifically, each data is divided into basic data as data necessary for reproduction and extended data for improving the accuracy and content of the data, and the extended data is further divided into a plurality of data. In the state, encoding is performed in a predetermined format for each data. Note that by removing some extension data from a plurality of encoded extension part data (hereinafter also referred to as extension data), the remaining data, that is, encoded basic part data (hereinafter referred to as extension data) Each of the extension data is generated so that the compression rate calculated from the remaining extension data and the original content data becomes a preset compression rate.

  The modified server 60 is configured to record the extended data received from the recording / reproducing apparatus 1 in the database 61 in addition to the content data received from the recording / reproducing apparatus 1. Similarly to the case where the content data acquisition command is received, when the extension data acquisition command is received, the requested extension data is read from the database 61 based on the identification information, and the source of the acquisition command is recorded. The extension data is transmitted to the playback device 1.

  Next, a recording process according to a modification will be described with reference to FIG. FIG. 13 is a flowchart showing a recording process of a modification executed by the control unit 40. Note that the processing from S210 to S240 is the same as the recording processing of the first embodiment, and a description thereof will be omitted.

  When the process of S240 is completed, the process proceeds to S245, where the content data recorded in the HDD 26 in the process of S215 is read and input to the decoder 14, and in the subsequent S250, it is determined whether or not the decryption process is completed. If it is determined that the decoding process is not completed (S250: NO), the determination of S250 is repeatedly executed. If it is determined that the decoding process is completed (S250: YES), the process proceeds to S255, and the decoded data Is input to the encoder 20.

  In subsequent S260, the encoder 20 determines whether or not the division and encoding of the input data has been completed. If it is determined that the input data has not been completed (S260: NO), the determination of S260 is repeatedly performed. If it is determined that the division and encoding process has been completed (S260: YES), the process proceeds to S265, and the divided and encoded data, that is, a plurality of extension data and basic data are recorded in the HDD. In subsequent S270, the addresses of the extended data and basic data recording destinations are stored in the EEPROM 48 as a part of the management data, and the process is terminated.

Next, a recorded data compression process according to a modification will be described with reference to FIG. FIG. 14 is a flowchart showing a recorded data compression process of a modification executed by the control unit 40.
When the process is started, first, in S540, the recording / reproducing apparatus 1 is connected to the Internet 2 via the communication unit 28, and in the subsequent S545, it is determined whether or not the recording data management process is being performed. If it is determined that the management process is being performed (S545: YES), the extension data suitable for setting the target data (content data) to the compression rate set in the registration data is read, and the process proceeds to S560.

  On the other hand, if it is determined that the recording management process is not being performed (S545: NO), it is determined that the content data compression process is based on a command input via the operation unit 30, and the process proceeds to S555 to execute the target data. To read the extension data suitable for the compression ratio set in the management data, and the process proceeds to S560.

  That is, for example, the target data is composed of basic data and four types of extended data 1 to 4, the compression rate is 10% when only basic data is present, and the compression rate is when basic data and extended data 1 are present. 30%, compression rate 50% for basic data and extended data 1 and 2, and compression rate 80% for basic data and extended data 1 to 3 when the compression rate is 80%. If it is, the extension data 3 and 4 are read in the processing of S550 and S555.

  In step S560, the read extension data is transmitted to the server 60 together with identification information indicating the details of the extension data (recording date, recording channel, extension data identification) and a recording command, and the process proceeds to step S565. In S565, it is determined whether or not recording completion information is received from the server 60. If it is determined that the recording completion information is not received (S565: NO), the process of S565 is repeated until it is received.

  On the other hand, when the recording completion information is received (S565: YES), the process proceeds to S570, the Internet connection is disconnected, and in the subsequent S575, the transmitted extension data (extension data 3 and 4 in the above example) is stored in the HDD 26. And the process proceeds to S580. In S580, the compression rate included in the management data of the target data is updated as necessary, and the process ends.

  Next, a reproduction process according to the modification will be described with reference to FIG. FIG. 15 is a flowchart showing a reproduction process of a modification executed by the control unit 40. Note that the processing from S610 to S665, S675, and S680 is the same as the playback processing of the first embodiment, and thus description thereof is omitted.

  If it is determined in S625 that the content data is recorded in the HDD 26 (S625: YES), the process proceeds to S810, and whether the compression rate of the content data recorded based on the management data is 100%. That is, it is determined whether or not the extension data of the content data is transmitted to the server 60. If it is determined that the compression rate of the content data is not 100% (S810: NO), that is, it is determined that the extended data is transmitted to the server 60, the process proceeds to S815 and connects to the Internet 2 via the communication unit 28. In subsequent S820, an extension data acquisition command is transmitted to the server 60 together with identification information indicating details (recording date and time, recording channel, extension data identification) of the extension data, and the process proceeds to S825.

  Next, in S825, it is determined whether or not the requested extension data is received via the communication unit 28. If the extension data is received (S825: YES), the process proceeds to S830 and the received extension data is received. In the subsequent S835, the address (start address, end address) of the extended data recorded in S830 in the management data is updated and the compression rate is updated to 100%, and the process proceeds to S840. Transition. In step S840, basic data and extension data are input to the decoder 14 and output via the image output unit 16 and the audio output unit 18, and the process ends.

  On the other hand, if it is determined in S825 that the extension data has not been received (S825: NO), the process proceeds to S850 and a predetermined time set in advance after the extension data acquisition command is transmitted to the server 60. If it is determined whether the predetermined time has not elapsed (S850: NO), the process proceeds to S825. On the other hand, if the predetermined time has elapsed (S850: YES), the process proceeds to S855, where the basic data recorded in the HDD 26 is input to the decoder 14 and output via the image output unit 16 and the audio output unit 18. Then, the process ends.

  If it is determined in S810 that the compression rate of the content data is 100%, that is, all the extended data is recorded in the HDD 26 (S810: YES), the process proceeds to S845 and is recorded in the HDD 26. The basic data and extension data read out are input to the decoder 14 and output via the image output unit 16 and the audio output unit 18, and the process is terminated.

  As described above, according to the recording / reproducing apparatus 1 of the modification, the same effect as that of the first embodiment can be obtained. In addition, the acquired content data is recorded separately in a plurality of hierarchies having basic data as data necessary for reproduction and extended data for improving the accuracy of the data. The amount of content data is reduced by erasing a part of the extended data based on the rate. For this reason, data can be compressed simply by erasing the data in the extended portion, so that the amount of data can be reduced in a short time.

  In addition, when the elapsed number of days matches the first determination date, the recording / reproducing apparatus 1 of the modification reads the extended data of the content data that matches the first determination date from the HDD 26 according to the compression rate, and stores the management data stored in the EEPROM 48 In the data, the compression rate of the target content data is updated, and the extension data is transmitted to the server 60 via the communication unit 28 to be recorded, and the extension data is deleted from the HDD 26 after the transmission.

  In addition, when a content data reproduction command is input via the operation unit 30, based on the management data stored in the EEPROM 48, extension data that is a part of the content data for which the reproduction command has been received is transmitted to the server 60. If the extension data is transmitted to the server 60, the extension data is acquired by transmitting a data acquisition command to the server 60 via the communication unit 28, and the acquired extension data Is reproduced together with the basic data, and when the extended data is not transmitted to the server 60, the basic data is read from the HDD 26 and reproduced.

  On the other hand, when the server 60 receives the extension data from the recording / reproducing apparatus 1, the server 60 records the extension data in the database 61. When the server 60 receives the data acquisition instruction from the recording / reproducing apparatus 1, the server 60 records the extension data in the database 61 based on the data acquisition instruction. The extended data is extracted, and the extracted extended data is transmitted to the recording / reproducing apparatus 1.

  Therefore, according to the data management system of the modified example, the extended data that cannot be recorded by the HDD 26 of the recording / reproducing apparatus 1 can be recorded in the database 61 of the server 60. The recording / reproducing apparatus 1 The extension data can be extracted from 61. For this reason, the user can watch the content data whose data amount has been reduced because the number of days elapsed since the recording has exceeded the first determination date, restored to the initial recording state.

Note that the recording process of this modification corresponds to the recording means of the present invention, the recorded data compression process corresponds to the data amount reducing means of the present invention, and the playback process corresponds to the playback means of the present invention.
Here, in the present modification, when content data is recorded, the content data is scalable and re-encoded according to the compression rate. However, when the broadcast signal is a signal that has been previously scalable encoded. May execute the recorded data compression processing using the divided signals as they are as basic data and extension data.

In this modified example, in the recording data compression process, the extension data is transmitted to the server 60 and recorded so that it can be acquired from the server 60 at the request of the user. Depending on various conditions such as a communication state, the server 60 may be deleted without being transmitted.
[Second Embodiment]
Next, a data management system according to the second embodiment constituted by a plurality of recording / reproducing apparatuses 80 will be described. FIG. 16 is a schematic configuration diagram showing the overall configuration of the data management system of the second embodiment.

  As shown in FIG. 16, the data management system of the second embodiment is configured such that a plurality of recording / reproducing devices 80 can communicate with each other via the Internet 2. The recording / reproducing apparatus 80 of the second embodiment includes two HDDs, and records content data of a selected channel on one HDD based on a command input from the operation unit 30 and is set in advance. The content data of the selected channel is continuously recorded on another HDD, and the content data once recorded on the HDD and then erased is stored in another recording / reproducing device 80 ( Hereinafter, it is mainly different from the recording / reproducing apparatus 1 of the first embodiment in that it is obtained from a group member. For this reason, the same code | symbol is attached | subjected to the same part, description is abbreviate | omitted, and only a different part is demonstrated.

  The tuner unit 86 is configured to be able to select a plurality of broadcast signals (two in this embodiment) simultaneously from broadcast signals received via an antenna based on a command from the control unit 90. Each of the signals is subjected to amplification processing or the like to extract a transmission path encoded signal and input to the demodulator 87.

The demodulating unit 87 demodulates each of the plurality of transmission path coded signals extracted by the tuner unit 86, extracts a TS from each signal, and inputs the TS to the decoder 14.
The first HDD 83 and the second HDD 84 are randomly accessible mass storage media on which various data such as content data is recorded. In particular, the first HDD 83 is used similarly to the HDD 26 of the first embodiment, while the second HDD 84 is made inaccessible by the user. That is, in the second HDD 84, the controller 90 is prohibited from erasing recorded data in accordance with a command input to the operation unit 30 by the user.

  Upon receiving a command from the control unit 90, the disk drive 85 reads various data such as content data recorded in each HDD 83, 84 from the first HDD 83 or the second HDD 84, and records various data in each HDD 83, 84. To do.

  The communication unit 82 includes various kinds of information necessary for communication with group members set to communicate with each other, and is configured to be able to communicate with each group member via the Internet 2.

  The control unit 90 includes a well-known microcomputer including a CPU 92, a RAM 94, a ROM 96, a rewritable EEPROM 98, and the like. To control.

  Then, similarly to the recording / reproducing apparatus 1 of the first embodiment, the channel selection command for the channel selected via the operation unit 30 is input to the tuner unit 86, whereby the content of the channel selected from the received broadcast signal is received. A process of acquiring data and outputting it from the display device 50 and the speaker 52 via the image output unit 16 and the audio output unit 18 and a recording process of recording the acquired content data in the first HDD 83 are performed. Further, similar to the recording / reproducing apparatus 1 of the first embodiment, a main routine, a compression rate changing process, and a registered data updating process are executed. However, in the present embodiment, in the registration data update process, what can be performed as a process to be performed corresponding to the determination date is only compression and deletion at a predetermined compression rate.

  On the other hand, various information such as management data and registration data is stored in the EEPROM 98 as in the case of the EEPROM 48 of the first embodiment. Further, one channel (hereinafter also referred to as a continuous recording channel) of receivable digital television broadcast signals is preset in the EEPROM 98, and the control unit 90 sends a channel selection command for the continuous recording channel to the tuner unit. By inputting to 86, the content data of the continuous recording channel is continuously recorded in the second HDD 84, and the oldest one is deleted.

  For this reason, content data for a predetermined time (hereinafter also referred to as recordable time) of the continuous recording channel is always recorded in each second HDD 84 of each group member. The continuous recording channel is set differently for each group member, and the content data of the channel different for each group member is recorded in the second HDD 84. Note that the EEPROM 98 stores correspondence information between the identification information of the group member and the continuous recording channel in which the group member records the content data.

  Next, recording data management processing of the recording / reproducing apparatus 80 of the second embodiment will be described with reference to FIG. FIG. 17 is a flowchart showing a recorded data management process executed by the control unit 90.

  When the process is started, the processes of S905 to S925 are executed. Since the processing of S905 to S925 is the same as that of S405 to S425, a description thereof will be omitted. If it is determined in S920 that the set processing is not content data compression (S920: NO), the process proceeds to S930, and the target data is deleted from the first HDD 83. In the subsequent S935, the target data is deleted. The data location included in the management data is changed from HDD to temporary erasure, and the process proceeds to S940.

  In S940, it is determined whether or not the processing after S920 has been executed for all target data. If it is determined that the processing has not been executed (S940: NO), the process proceeds to S920. For other target data, the processing from S920 is executed. On the other hand, if it is determined that the processing has been executed for all the target data (S940: YES), the process proceeds to S945, and content data whose data location is temporarily erased based on the management data When it is determined whether or not there is content data that exceeds a preset recordable time, and it is determined that there is data that exceeds the recordable time (S945: YES), the process proceeds to S950, and the recordable time is reached. The management data of the content data determined to have exceeded is erased, and the process is terminated. On the other hand, if it is determined that there is no content data that has exceeded the recordable time (S945: NO), the processing ends.

  Next, playback processing executed by the recording / playback apparatus 80 of the second embodiment will be described. Since the reproduction process of the second embodiment is substantially the same as the reproduction process of the first embodiment, only different processes will be described with reference to FIG.

In the second embodiment, in S625, it is determined whether or not the selected content data is recorded in the first HDD 83 or the second HDD 84.
If it is determined in S625 that the content data is not recorded in either the first HDD 83 or the second HDD 84 (S625: NO), the process proceeds to S630 to select whether to acquire the content data from the group member. A screen is displayed on the display device 50. In S635, it is determined whether or not an acquisition command is input to acquire content data from the group member via the operation unit 30, and when the acquisition command is input (S635: YES), the process proceeds to S640. In step S645, the group member whose content data is recorded in the second HDD 84 is extracted based on the correspondence information stored in the EEPROM 98, and the requested content is connected. A data acquisition command is transmitted to the extracted group member together with identification information (for example, recording file name) indicating details (recording date and time, recording channel) of the content data, and the process proceeds to S650. The processes after S650 are the same as those in the first embodiment.

Next, data transmission processing of the recording / reproducing apparatus 80 of the second embodiment will be described with reference to FIG. FIG. 18 is a flowchart showing data transmission processing executed by the control unit 90.
The data transmission process is a process that is started when it is determined in the process of S150 of the main routine that the command input through the communication unit 82 is a content data acquisition command, and the process is started. In step S1110, the content data requested from the second HDD 84 is read based on the identification information, and in step S1120, the read content data is transmitted to the group member that is the request source of the data acquisition command. finish.

  As described above, in the recording / reproducing apparatus 80 of the second embodiment, the second HDD 84 and the communication unit 82 for communicating with other recording / reproducing apparatuses 80 (that is, group members) belonging to the management data system, Is provided. Then, content data of a preset channel is acquired and constantly recorded in the second HDD 84, content data designated based on a command from the operation unit 30 is acquired and recorded in the first HDD 83, and the number of elapsed days is the first. If it is determined that the second determination date has been exceeded, the data location of the content data determined to have exceeded the second determination date in the management data stored in the EEPROM 98 is updated from the HDD to temporary erasure, and the content data is updated to the first HDD 83. Erase from

  Further, when a data acquisition command is received from a group member via the communication unit 82, the requested content data is extracted from the content data recorded in the second HDD 84 based on the received data acquisition command, and the communication unit 82. To the requesting group member. On the other hand, when a content data reproduction command is input from the outside, it is determined whether or not the content data for which the reproduction command is received is stored in the first HDD 83 or the second HDD 84 based on the data location of the management data. Is stored in any of the HDDs 83 and 84, the content data is read from any of the HDDs 83 and 84 and reproduced. If the content data is not stored in any of the HDDs 83 and 84, the EEPROM 98 is stored. The content data is acquired and reproduced by transmitting a data acquisition command to the group members based on the correspondence information stored in the file.

  Therefore, according to the recording / reproducing apparatus 80 of the second embodiment, content data is deleted from the first HDD 83 when the number of elapsed days exceeds the second determination date. It is possible to prevent the storage area from being occupied. Moreover, content data that has been erased from the first HDD 83 beyond the second determination date can be acquired from the second HDD 84 or the group member within the recordable time, and the content data can be obtained in accordance with the user's playback command. Data can be played back.

  In the data management system of the second embodiment, the plurality of recording / reproducing devices 80 are configured to record content data of continuous recording channels that are different between the recording / reproducing devices 80 in the second HDD 84, respectively. In the entire data management system, content data of all channels is recorded. Therefore, content data that has been erased from the first HDD 83 can be acquired in the data management system by one recording / reproducing device 80 belonging to the data management system, and the content data once recorded in the first HDD 83 can be obtained. The recording / reproducing apparatus 80 belonging to the same data management system can be shared within the recordable time.

  In the first embodiment, the recording / reproducing device 80 (group member) corresponds to the recording device of the present invention, the first HDD 83 corresponds to the first storage medium of the present invention, and the second HDD 84 corresponds to the second storage medium of the present invention. The communication unit 82 corresponds to the communication means of the present invention, and the EEPROM 98 corresponds to the history storage means.

  Further, the recording process corresponds to the recording means of the present invention, the process of S905 corresponds to the time measuring means of the present invention, the process of S910 corresponds to the elapsed time determination means of the present invention, and the processes of S930 and S935 correspond to the present invention. The data erasure means corresponds to the reproduction means of the present invention, and the data transmission process corresponds to the data transmission means of the present invention.

As mentioned above, although one Embodiment of this invention was described, it cannot be overemphasized that this invention can take a various form.
In the first embodiment, when a recording command is input from the operation unit 30, the TV broadcast signal of the selected channel is extracted from the TV broadcast signals received by the antenna and recorded in the HDD 26. However, the program of a specific channel may be continuously recorded on the storage medium. Alternatively, all channel programs based on television broadcast signals receivable by the antenna may be continuously recorded in a storage medium.

  In each of the above embodiments, the recording apparatus of the present invention is a recording / reproducing apparatus capable of recording content data in the HDD. However, the recording apparatus of the present invention is a recording-dedicated apparatus including a large-capacity storage medium, It may be a personal computer. Further, it may have a function of recording content data on a multimedia optical disk such as a DVD.

  In each of the embodiments described above, the recording / reproducing apparatus that can be connected to the Internet is used. However, it is not always necessary to include a communication unit. In that case, as a process to be performed in accordance with the determination date, compression at a predetermined compression rate is performed. It is sufficient that only deletion can be selected.

  Also in the second embodiment, content data may be recorded as in the modification of the first embodiment, and the content data and the extended data may be exchanged with other group members.

  In the above embodiment, the recording / reproducing apparatus receives a digital television broadcast signal via an antenna and records it on the HDD. However, the transmission format of the television broadcast signal is not limited to radio waves, but a coaxial cable, CATV using an optical cable or Internet broadcasting using a telephone line or the like may be used. Further, the recording / reproducing apparatus may be provided with a DV terminal so that the content data can be acquired via the DV terminal. Further, the content data is not limited to moving image information having audio and video extracted from a television broadcast signal, and may be audio only or video only information.

It is a schematic block diagram which shows the structure of the whole management data system of 1st Embodiment. It is a flowchart which shows the main routine of 1st Embodiment. It is a flowchart which shows the video recording process of 1st Embodiment. It is explanatory drawing which shows an example of the video recording data list of 1st Embodiment. It is a flowchart which shows the registration data update process of 1st Embodiment. It is explanatory drawing which shows an example of the process list according to genre of 1st Embodiment. It is a flowchart which shows the video recording data management process of 1st Embodiment. It is a flowchart which shows the video recording data compression process of 1st Embodiment. It is a flowchart which shows the reproduction | regeneration processing of 1st Embodiment. It is a flowchart which shows the compression rate change process of 1st Embodiment. It is explanatory drawing which shows an example of the compression rate change screen of the content data of 1st Embodiment. It is a flowchart which shows the data recording process of 1st Embodiment. It is a flowchart which shows the video recording process of a modification. It is a flowchart which shows the video recording data compression process of a modification. It is a flowchart which shows the reproduction | regeneration processing of a modification. It is a schematic block diagram which shows the structure of the whole management data system of 2nd Embodiment. It is a flowchart which shows the video recording data management process of 2nd Embodiment. It is a flowchart which shows the data transmission process of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Recording / reproducing apparatus, 2 ... Internet, 10 ... Tuner part, 12 ... Demodulation part, 14 ... Decoder, 16 ... Image output part, 18 ... Audio | voice output part, 20 ... Encoder, 24 ... Disk drive, 26 ... Hard disk (HDD) , 28 ... Communication section, 30 ... Operation section, 32 ... Operation key, 34 ... Remote control sensor, 36 ... Remote control, 40 ... Control section, 50 ... Display device, 52 ... Speaker, 60 ... Server, 61 ... Database, 70 ... Graph screen, 71 ... Compression ratio display section, 72 ... Cursor, 73, 73a ... Horizontal bar, 74 ... Days setting tab, 75 ... Contents display, 76 ... Compression ratio change operation section, 77 ... Compression ratio change tab, 78 ... Progress Day change operation unit, 80 ... recording / reproducing apparatus, 82 ... communication unit, 83 ... first HDD, 84 ... second HDD, 85 ... disk drive, 86 ... tuner unit, 87 ... demodulation unit, 0 ... control unit

Claims (17)

A recording apparatus comprising recording means for acquiring content data including at least one of an image and sound and recording the content data in a first storage medium,
Clocking means for clocking an elapsed time from the time of recording the content data in the first storage medium;
Elapsed time determination means for determining whether or not the elapsed time measured by the timing means has exceeded a preset first determination time;
When the elapsed time determining means determines that the elapsed time has exceeded the first determination time, the first determination time has been exceeded based on a reduction ratio set in advance corresponding to the first determination time. A data amount reducing means for reducing the data amount of the determined content data within a reproducible range of the content data;
A recording apparatus comprising: In addition to determining whether or not the elapsed time has exceeded the first determination time, the elapsed time determination means determines whether or not the elapsed time has exceeded a second determination time set longer than the first determination time. Is determined, and
When the elapsed time determining means determines that the elapsed time has exceeded the second determination time, it comprises data erasing means for erasing content data determined to have exceeded the second determination time. The recording apparatus according to claim 1.   The plurality of first determination times are set, and each reduction ratio with respect to each first determination time is set to increase as the first determination time becomes longer. Alternatively, the recording apparatus according to claim 2. At least one of the first determination time or the reduction ratio is set for each type of the content data,
The data amount reduction means identifies the type of the content data, and reduces the data amount based on the first determination time and the reduction rate corresponding to the identified type. 4. The recording device according to any one of items 3.   The recording apparatus according to claim 1, further comprising a first determination time setting unit configured to set the first determination time based on an external input.   6. The recording apparatus according to claim 1, further comprising a reduction ratio setting unit that sets the reduction ratio based on an external input.   The data amount reducing means, when it is determined that the elapsed time has exceeded the first determination time, and when a reduction command for reducing the data amount of the content data is input from the outside, 7. The recording apparatus according to claim 1, wherein the data amount of content data recorded on one storage medium is reduced. Display control means for displaying on the display means a reduction rate of the content data recorded in the first storage medium;
When the display control means displays the reduction ratio, when a change command for changing the reduction ratio is input from the outside, the display of the reduction ratio is performed based on the input change command. Make a change, and a reduction rate identification means to identify the reduction rate from the display after the change,
With
When the reduction ratio is specified by the reduction ratio specifying means, the data amount reducing means reduces the data amount of the content data based on the specified reduction ratio, assuming that the reduction command is input. The recording apparatus according to claim 7, characterized in that: The recording means records the content data acquired from the outside divided into a plurality of hierarchies having a basic part as data necessary for reproduction and an extended part for improving the accuracy and content of the data,
9. The data amount reduction unit according to claim 1, wherein the data amount reduction unit reduces the data amount of the content data by erasing a part of the data of the extension portion based on the reduction ratio. The recording device described in 1. A communication means for communicating with an external device;
History storage means for recording a communication history;
With
The data erasing means is
When the elapsed time determining means determines that the elapsed time has exceeded the second determination time, the content data determined to have exceeded the second determination time is read from the first storage medium, and the read content data The identification information is recorded in the history storage unit as a communication history, and the content data is transmitted as storage data to the external device via the communication unit, and the content data is transmitted from the first storage medium after transmission. 10. A recording apparatus according to claim 2, wherein the recording apparatus is erased.   When a content data reproduction command is input from the outside, based on the communication history stored in the history storage means, it is determined whether the content data that has received the reproduction command is transmitted to the external device, When the content data is transmitted to the external device, the content data is acquired and reproduced by transmitting a data acquisition command to the external device via the communication unit, and the content data is The recording apparatus according to claim 10, further comprising a reproducing unit that reads out and reproduces the content data that has received the reproduction instruction from the first storage medium when it is not transmitted to an external device. A communication means for communicating with an external device;
History storage means for recording a communication history;
With
The data amount reducing means reads out the data of the extension portion from the first storage medium, records the identification information of the read data of the extension portion as a communication history in the history storage means, and stores the communication means as storage data. The recording apparatus according to claim 9, wherein the recording is transmitted to the external apparatus via a recording medium, and the data of the extension portion is erased from the first storage medium after the transmission.   When a content data reproduction command is input from the outside, whether or not the data of the extended portion of the content data that has received the reproduction command is transmitted to the external device based on the communication history recorded in the history storage unit If the data of the extension portion is transmitted to the external device, the data of the extension portion is acquired by transmitting a data acquisition command to the external device via the communication means. When the content data is reproduced with the acquired extension portion data and the basic portion data stored in the first storage medium, and the extension portion data is not transmitted to the external device, 13. The recording apparatus according to claim 12, further comprising a reproducing unit that reads out and reproduces content data that has received a reproduction instruction from the first storage medium. A second storage medium provided separately from the first storage medium;
A communication means for communicating with an external device;
History storage means for recording the erasure history;
With
The recording means includes
The content data set in advance is acquired and recorded in the second storage medium, and the content data designated based on an external command is acquired and recorded in the first storage medium.
The data erasing means is
When the elapsed time determining means determines that the elapsed time has exceeded the second determination time, the identification information of the content data determined to have exceeded the second determination time is recorded in the history storage means, and Erasing content data from the first storage medium,
further,
Upon receiving a data acquisition command from the external device via the communication means, the requested content data is extracted from the content data recorded on the second storage medium based on the data acquisition command, and the communication Data transmitting means for transmitting to the requesting external device via the means;
When a content data reproduction command is input from the outside, the content data that has received the reproduction command is stored in the first storage medium or the second storage medium based on the identification information recorded in the history storage means. If the content data is stored in any storage medium, the content data is read from the storage medium and played back, and the content data is stored in any storage medium. If the data is not stored in the medium, a reproducing unit that acquires and reproduces the content data by transmitting the data acquisition command to a preset external device;
The recording apparatus according to claim 2, further comprising: A recording apparatus according to claim 11 or claim 13,
A management device for managing the storage data transmitted from the recording device;
A data management system comprising:
The management device
When the storage data is received from the recording device, storage data storage means for recording in the management storage means;
When the data acquisition command is received from the recording device, the storage data transmitting unit that extracts the storage data recorded in the management-side storage unit based on the data acquisition command and transmits the data to the recording device;
A data management system comprising: A plurality of the recording devices are provided,
When the storage data storage unit receives the storage data, the storage data storage unit determines whether the same storage data as the received storage data is recorded in the management-side storage unit, and the same storage data is recorded. 16. The data management system according to claim 15, wherein the received storage data is recorded in the management-side storage means if not. A data management system comprising a plurality of recording devices according to claim 14,
The plurality of recording devices are configured to distribute and record the content data that can be acquired to each second storage medium,
When the content data is not stored in any of the first storage medium and the second storage medium, the playback unit of each recording device may have another playback unit belonging to the data management system based on the identification information. A data management system, wherein one of recording devices is selected and the content data is acquired from the selected recording device.

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