JP4830433B2 - Television receiver and remaining capacity management method - Google Patents

Television receiver and remaining capacity management method Download PDF

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JP4830433B2
JP4830433B2 JP2005287491A JP2005287491A JP4830433B2 JP 4830433 B2 JP4830433 B2 JP 4830433B2 JP 2005287491 A JP2005287491 A JP 2005287491A JP 2005287491 A JP2005287491 A JP 2005287491A JP 4830433 B2 JP4830433 B2 JP 4830433B2
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remaining capacity
recording
hdr
receiver
nonvolatile memory
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JP2007104006A (en
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史 倉持
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ソニー株式会社
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  The present invention relates to a television receiver of a system including a television receiver and an external recording device such as a hard disk recorder connected thereto, and a method of managing the remaining capacity of the external recording device by the television receiver.

  A hard disk recorder is connected to a television receiver through a digital interface such as an IEEE 1394 interface (i.LINK (registered trademark)), a program reserved for recording by the receiver is received by the receiver, and the hard disk recorder (in the hard disk recorder) A system for recording data on a hard disk) has been considered and put into practical use.

  In the following, “television receiver” is abbreviated as “receiver”, and “hard disk recorder” is abbreviated as “HDR”.

  In the above system, if the remaining capacity of the HDR (hard disk in the HDR) is insufficient when setting the recording reservation, the recording fails. To prevent this, at the time of reservation setting, the receiver may detect the remaining capacity of the HDR and display it on the display, etc., and present it to the user. To detect the remaining capacity of the HDR, It is necessary to turn on the power and acquire the status (information indicating the HDR state) from the HDR.

  However, it takes time until the HDR power is turned on and the status can be acquired from the HDR. Therefore, in the conventional system, when the reservation is set, the remaining capacity is not particularly displayed. In order for the user to check the remaining capacity, the HDR power is turned on separately by IEEE LINC (Logical Interface Connection) and the remaining capacity is turned on. Must be displayed on the operation panel.

  In Patent Document 1 (Japanese Patent Laid-Open No. 2003-209775), an external recording device such as D-VHS is connected to a receiver through an IEEE1394 interface, and at the time of reservation setting, the receiver (MPU (CPU) of the receiver) Turn on the power of the external recording device, acquire information such as the remaining tape amount from the external recording device, determine whether or not the entire program can be recorded, and notify the user when it cannot be recorded It is shown.

The prior art documents listed above are as follows.
JP 2003-209775 A

  However, as described above, in the method in which the user turns on the HDR power each time and checks the remaining capacity on the operation panel, the user does not always perform such an operation or procedure every time. The user may make a reservation setting without noticing that the remaining capacity is insufficient, and as a result, recording may not be possible due to insufficient remaining capacity.

  In addition, at the time of reservation setting as shown in Patent Document 1, the receiver turns on the power of the external recording device, acquires the status from the external recording device, and determines whether or not the entire program can be recorded. In the method of presenting the determination result, as described above, it takes time for the external recording device to be turned on and to acquire the status from the external recording device. have to wait.

  Therefore, the present invention grasps the remaining capacity of the external recording device at the receiver without setting the status of the external recording device by turning on the external recording device and acquiring the status from the external recording device at the time of reservation setting. Thus, it can be presented to the user, and the failure of recording due to insufficient remaining capacity can be prevented and reduced.

The remaining capacity management method of this invention is:
A method of managing a remaining capacity of the external recording device in the television receiver of a system comprising a television receiver and a plurality of external recording devices connected thereto,
When recording data on the recording medium of the external recording device or erasing data from the recording medium of the external recording device, the recording medium after obtaining the status from the external recording device and recording or erasing the data A remaining capacity recording step for recording the remaining capacity in a nonvolatile memory in the television receiver;
When the power of the television receiver is turned on, the remaining capacity is read from the non-volatile memory, and the remaining capacity of the external recording device that has been accessed before is set as a remaining capacity list, and the main receiver of the television receiver is read. A boot process that writes to memory;
When recording reservation is set in the television receiver, the remaining capacity on the main memory is converted into a recordable time, and is presented .
At the time of recording as the execution of recording reservation, for the external recording device selected for recording, the remaining capacity on the nonvolatile memory and the latest remaining capacity indicated by the status acquired from the external recording apparatus are In addition to writing to the memory, when a difference equal to or greater than a threshold value is generated between the remaining capacity on the nonvolatile memory and the latest remaining capacity, the remaining capacity on the nonvolatile memory is rewritten to the latest remaining capacity. .

  In the remaining capacity management method of the present invention configured as described above, when the reservation is set, the latest remaining capacity of the external recording device as a result of the most recent data recording or data erasing before that is the non-volatile memory and main memory of the receiver. Therefore, the receiver presents the latest remaining capacity of the external recording device without turning on the power of the external recording device and acquiring the status from the external recording device.

  Therefore, the user can immediately determine whether or not the remaining capacity is insufficient without performing an operation or procedure such as turning on the power of the external recording apparatus and without waiting. Recording failure due to lack can be prevented and reduced.

  As described above, according to the present invention, at the time of reservation setting, the external recording device can be turned on by the receiver without turning on the power of the external recording device and acquiring the status from the external recording device, and thus without waiting for the user. The remaining capacity can be grasped and presented to the user, and recording failure due to insufficient remaining capacity can be prevented and reduced.

[1. System Embodiment: FIG. 1]
FIG. 1 shows an example of a system comprising a television receiver and an external recording device according to the present invention, in which five hard disk recorders 41, 42, 43, 44 and 45 are connected to the television receiver 10. .

  In the following, “television receiver 10” is abbreviated as “receiver 10”, “hard disk recorder” is abbreviated as “HDR”, “hard disk recorder 41” is denoted as “HDR-A”, and “hard disk recorder 42”. “HDR-B”, “Hard Disk Recorder 43” is “HDR-C”, “Hard Disk Recorder 44” is “HDR-D”, and “Hard Disk Recorder 45” is “HDR-E”.

  The receiver 10 includes a CPU 11, and the bus 12 stores information such as an OS (Operating System) or application program, data such as display data, and remaining capacity and recording reservation setting information described later. A memory 13 is connected, and a main memory 14 to which a program and data are expanded and a remaining capacity list to be described later is written is connected.

  Furthermore, a light receiving unit 16 that receives an infrared remote control signal from the remote controller 30 is connected to the bus 12.

  The CPU 11 controls each part of the receiver 10 such as the digital tuner 21 and the descrambler 22, but the connection thereof is omitted in FIG.

  When receiving and viewing satellite digital broadcasting or terrestrial digital broadcasting, the digital tuner 21 selects a digital broadcast and demodulates the MPEG2 transport stream. Further, the scrambled transport stream such as pay broadcasting is unscrambled by the descrambler 22.

  Further, the demultiplexer 23 separates video packets and audio packets of a desired program from the MPEG2 transport stream.

  The separated video packet is decoded by the MPEG2 video decoder 24, further decoded into a video signal such as an NTSC signal by the video processing circuit 26, and sent to a display 27 such as a liquid crystal display.

  The separated audio packet is decoded by the MPEG2 audio decoder 25, further decoded into an audio signal by the audio processing circuit 28, and output to a speaker (multiple channel speaker group) 29.

  In the demultiplexer 23, data information of the data broadcast is separated. The separated data information is taken into the bus 12, and under the control of the CPU 11, an OSD (On Screen Display) addition circuit 17 generates a signal for displaying a data broadcast screen from the data information. The generated screen display signal is added to the video signal on the input side of the video processing circuit 26.

  In addition, the OSD addition circuit 17 generates a signal for displaying a screen such as a recording reservation setting screen and supplies it to the video processing circuit 26.

  The receiver 10 and each HDR are connected by a digital interface 19 such as an IEEE1394 interface. Although omitted in FIG. 1, each HDR also has a similar digital interface.

  At the time of recording, the program data from the demultiplexer 23 is transmitted to the designated HDR via the digital interface 19 and recorded, and the status is transmitted from the HDR to the receiver 10 and taken into the bus 12.

  At the time of reproduction, program data and status are transmitted from the designated HDR to the receiver 10 via the digital interface 19, the program data is supplied to the demultiplexer 23, and the status is taken into the bus 12.

  Each HDR may have a different total recording capacity of each hard disk, but in the following example, it is assumed that the total recording capacity of each hard disk is 160 GB (163840 MB).

[2. Embodiment of Remaining Capacity Management Method: FIGS. 2 to 11]
(2-1. Initial state: FIG. 2)
In the system described above, at a certain point in time when the power of the receiver 10 is turned off, the nonvolatile memory 13 of the receiver 10 is in a state where information is recorded as shown in FIG.

  The HDR-E is sorted at the head (lowermost column in FIG. 2) as the last accessed HDR, and the GUID (Global Unique ID) and the remaining capacity are recorded. That is, HDR-E has a remaining capacity of 61440 MB (60 GB) as a result of the last access and data being recorded or erased.

  The HDR-D is not the last, but is sorted in the second (second column from the bottom in FIG. 2) as the previously accessed HDR, and the GUID and the remaining capacity are recorded. In other words, HDR-D has a remaining capacity of 81920 MB (80 GB) as a result of previously accessed data being recorded or erased.

  HDR-A, HDR-B and HDR-C are each connected to the receiver 10, but have not been accessed yet, so there is no GUID and no remaining capacity is recorded.

(2-2. Start-up process: FIGS. 3 and 4)
When the power of the receiver 10 is turned on by the user in the above state, the CPU 11 of the receiver 10 in step 51, from the nonvolatile memory 13 as shown in FIG. The remaining capacity is read as a set and written in the main memory 14 as a remaining capacity list.

  Specifically, when the nonvolatile memory 13 is in the recording state shown in FIG. 2 immediately before the power is turned on, the main memory 14 stores the GUID for HDR-E and HDR-D as shown in FIG. The remaining capacity on the nonvolatile memory and the latest remaining capacity are written. However, the latest remaining capacity is the same as the remaining capacity on the nonvolatile memory immediately after the power is turned on.

(2-3. Recording reservation setting: FIG. 5)
When making a recording reservation, the user turns on the power of the receiver 10 as described above by operating the remote controller 30, and sets a reservation setting screen on the display 27 from an electronic program guide or the like installed in the receiver 10. Is displayed, the program to be recorded is designated, and the HDR to be recorded is selected.

  As a result, the CPU 11 of the receiver 10 executes the remaining capacity presenting process as follows. FIG. 5 shows an example of the remaining capacity presentation process.

  In the remaining capacity presenting process 60 at the time of reservation setting in this example, when the user selects HDR on the reservation setting screen, the CPU 11 of the receiver 10 detects the selection of the HDR by the user at step 61, and then proceeds to step 62. Thus, it is determined whether or not the HDR GUID selected by the user exists in the remaining capacity list on the main memory 14.

  When the remaining capacity list on the main memory 14 at the time of reservation setting is as shown in FIG. 4 and the user selects HDR-E or HDR-D as the HDR for recording the program, the main memory 14 Since the HDR GUID exists in the upper remaining capacity list, the CPU 11 of the receiver 10 proceeds from step 62 to step 63 to display the latest remaining capacity of the HDR in the remaining capacity list on the reservation setting screen. .

  That is, when the user selects HDR-E, the latest remaining capacity is displayed as “61440 MB” or “60 GB”, and when the user selects HDR-D, the latest remaining capacity is displayed. Is displayed as “81920 MB” or “80 GB”.

  Therefore, the user can easily and reliably determine whether or not the program to be recorded can be recorded in the HDR.

  On the other hand, the remaining capacity list on the main memory 14 at the time of reservation setting is as shown in FIG. 4, and the user has selected HDR-A, HDR-B or HDR-C as the HDR for recording the program. In this case, since the HDR GUID does not exist in the remaining capacity list on the main memory 14, the CPU 11 of the receiver 10 proceeds from step 62 to step 64 and does not display the remaining capacity on the reservation setting screen.

  When HDR-A, HDR-B or HDR-C is selected in this way, the remaining capacity is not displayed. However, in such a case, there is a high possibility of HDR immediately after purchase, and it is possible to record sufficiently, so there is a practical problem. Does not occur.

  Unlike FIG. 4, when the latest remaining capacity of HDR-E or HDR-D is not sufficient to record the program, and the user selects HDR-E or HDR-D with a small remaining capacity The receiver 10 is configured so that the user can select another HDR, that is, the HDR selection can be changed.

  If a recording reservation for another program has already been set for the HDR, this is also displayed, or it is necessary for recording the other program from the latest remaining capacity of the HDR. It is desirable to configure the receiver 10 so that the capacity resulting from the reduction of the capacity is displayed as the remaining capacity of the HDR.

  Note that the receiver 10 may be configured such that the remaining capacity is converted into a recordable time and displayed.

  In addition, the presentation of the remaining capacity may be executed by a voice announcement such as “the remaining capacity of the selected hard disk recorder is 60 GB” instead of being displayed on the display 27.

(2-4. Recording as execution of recording reservation: FIGS. 6 to 11)
When the recording reservation is set in the receiver 10 as described above, the necessary part including the digital tuner 21 of the receiver 10 is turned on at the broadcast start time of the program, and the program is received by the receiver 10. When the channel selection is received, the CPU 11 turns on the power of the HDR selected by the user at the time of reservation setting, and the program data from the demultiplexer 23 is transmitted to the HDR via the digital interface 19, and is transmitted to the HDR. To be recorded.

  At the same time, the receiver 10 reads the HDR GUID and the remaining capacity from the nonvolatile memory 13 and writes them as a remaining capacity list in the main memory 14 as well as the above-described activation process. The status is transmitted to and the latest remaining capacity of the HDR is rewritten as needed with the recording in the HDR.

<Remaining capacity list at the start of recording: FIG. 6>
If information is recorded in the non-volatile memory 13 as shown in FIG. 2 immediately before the start of recording and recording of the program reserved for recording, the remaining capacity list written and formed in the main memory 14 at the start of recording When the selected HDR is HDR-A, HDR-B, or HDR-C in which no GUID exists at the time of selection, for example, HDR-A, the one shown in FIG. When the selected HDR is HDR-D, it is as shown in FIG. 6 (B), and when the selected HDR is HDR-E, it is shown in FIG. 6 (C). It shall be shown.

  That is, as indicated by arrows in FIGS. 6A, 6B, and 6C, in any case, the selected HDR is sorted and the selected HDR is selected. Sometimes, when the GUID is HDR that does not exist, by acquiring the status from the HDR, as shown in FIG. 6A, the GUID of the HDR (in this case, HDR-A) is recorded, The total recording capacity of the HDR (163840 MB (160 GB) in this example) is recorded as the remaining capacity on the nonvolatile memory of the HDR and the latest remaining capacity.

<Rewrite the latest remaining capacity and the remaining capacity in non-volatile memory>
As for the HDR in which program data is recorded as execution of recording reservation, as described above, the latest remaining capacity is rewritten and updated as needed, but the latest remaining capacity and the remaining capacity in the nonvolatile memory are updated. When there is a difference greater than or equal to the threshold value (the latest remaining capacity is smaller than the remaining capacity on the nonvolatile memory), the remaining capacity on the nonvolatile memory is also written to match the latest remaining capacity. Replace and update.

  The threshold capacity is, for example, 1 GB. However, if higher accuracy is required, the threshold capacity is less than 1 GB. If the total recording capacity of each HDR is very large, the required capacity and system configuration are increased. It can be set accordingly.

<Remaining capacity management processing during recording: FIGS. 7 and 8>
7 and 8 show an example of the remaining capacity management process at the time of recording, which is executed by the CPU 11 of the receiver 10 as described above.

  In this example, the remaining capacity management process 70 at the time of recording starts the process by turning on the power of the HDR for recording. First, at step 71, the acquisition of the status of the HDR starts. In step 72, it is determined whether or not the HDR GUID exists in the initial remaining capacity list on the main memory 14 as shown in FIG.

  When the HDR does not exist in the initial remaining capacity list on the main memory 14 as in the case where the HDR is HDR-A (when recording to HDR-A), the steps from step 72 to step Proceeding to 75, the GUID of the HDR is acquired, the HDRs are sorted at the head, and the HDR GUID and the remaining capacity are recorded in the nonvolatile memory 13 as one set. As shown in FIG. 6, the GUI of each HDR, the remaining capacity on the nonvolatile memory, and the latest remaining capacity are recorded in the main memory 14 as one set as a remaining capacity list.

  On the other hand, the HDR GUID exists in the initial remaining capacity list on the main memory 14 as in the case where the HDR is HDR-D or HDR-E (when recording to HDR-D or HDR-E). In this case, the process proceeds from step 72 to step 73 to determine whether or not a difference of 1 GB or more has occurred between the remaining capacity of the HDR nonvolatile memory and the latest remaining capacity. Since the remaining capacity is equal to the latest remaining capacity, the process further proceeds to step 74 to determine whether or not the HDR is at the head (latest) in the remaining capacity list.

  If the HDR is not at the beginning of the remaining capacity list as in the case where the HDR is HDR-D (when recording to HDR-D), the process proceeds from step 74 to step 75. Each HDR is sorted with the HDR at the head, and the GUID and remaining capacity of each HDR are recorded in one set in the nonvolatile memory 13, and each HDR is recorded in the main memory 14 as shown in FIG. 6B. The GUID, the remaining capacity on the nonvolatile memory and the latest remaining capacity are recorded as a remaining capacity list in one set.

  On the other hand, when the HDR is HDR-E (when recording to HDR-E), if the HDR is at the top of the remaining capacity list from the beginning, the process proceeds from step 74 to step 76. As shown in FIG. 6C, the latest remaining capacity of the HDR is recorded in the main memory 14. This latest remaining capacity is initially the same as the remaining capacity on the nonvolatile memory.

  Regardless of the HDR (regardless of which HDR is recorded), after the processing in step 75 or 76, the process proceeds to step 77 to determine whether or not there is a notification of the remaining capacity change from the HDR. When the HDR is notified that the remaining capacity has changed as a result of recording, the process returns from step 77 to step 72 to determine whether or not the HDR GUID exists in the remaining capacity list on the main memory 14. Judging.

  However, in the second and subsequent rounds, regardless of the HDR, since the HDR GUID already exists, the process always proceeds from step 72 to step 73, where the remaining capacity on the nonvolatile memory of the HDR is the latest. It is determined whether a difference of 1 GB or more has occurred with the remaining capacity.

  If there is still no difference of 1 GB or more between the remaining capacity on the nonvolatile memory of the HDR and the latest remaining capacity, the process proceeds from step 73 to step 74, where the HDR is the head in the remaining capacity list. It is judged whether it is in.

  However, in the second and subsequent rounds, regardless of the HDR, since the HDR is already at the top of the remaining capacity list, the routine always proceeds from step 74 to step 76 to store the HDR in the main memory 14. Record the latest remaining capacity. That is, the latest remaining capacity of the HDR in the remaining capacity list is rewritten to the latest remaining capacity.

  In the second and subsequent rounds, when a difference of 1 GB or more occurs between the remaining capacity of the HDR nonvolatile memory and the latest remaining capacity, the process proceeds from step 73 to step 75, and the latest remaining capacity for the HDR is determined. Is recorded in the nonvolatile memory 13 as one set, and the HDR GUID, the remaining capacity on the nonvolatile memory, and the latest are recorded in the main memory 14. Are recorded in one set as a remaining capacity list.

  Even after the second round, until the recording of the program reserved for recording is completed, the process proceeds to step 77 after the processing in step 76 or 75, and whether or not there is a notification of the remaining capacity change from the HDR. When it is determined and the HDR notifies that the remaining capacity has changed, the process returns from step 77 to step 72.

<Remaining capacity management at the end of recording: FIGS. 9 to 11>
Under the above-mentioned remaining capacity management, when all data of a program reserved for recording is recorded as, for example, 19.5 GB (19968 MB), the remaining capacity list on the main memory 14 at the end of recording is HDR- When it is recorded on A, it is as shown in FIG. 9A, when it is recorded on HDR-D, it is as shown in FIG. 9B, and when it is recorded on HDR-E. As shown in FIG.

  That is, when recorded in HDR-A, the latest remaining capacity of HDR-A is (160-19.5) GB = 140.5 GB, whereas the remaining capacity on the nonvolatile memory is (160-19). ) When GB = 141 GB and recorded in HDR-D, the latest remaining capacity of HDR-D is (80-19.5) GB = 60.5 GB, whereas the remaining capacity on the nonvolatile memory is (80-19) GB = 61 GB, and when recorded in HDR-E, the latest remaining capacity of HDR-E is (60-19.5) GB = 40.5 GB, whereas in the non-volatile memory In this case, the remaining capacity of the recorded HDR non-volatile memory is 0.5 GB more than the latest remaining capacity (actual remaining capacity).

  Therefore, at the end of recording, the CPU 11 of the receiver 10 writes the remaining capacity on the nonvolatile memory 13 to match the latest remaining capacity (actual remaining capacity) by the remaining capacity management process as shown in FIG. Change.

  Specifically, in the remaining capacity management process 80 at the end of recording in the example of FIG. 10, after recording all data of the program in the HDR, first, in step 81, the acquisition of the status of the HDR is terminated, and the HDR is recorded. In step 82, it is determined whether or not there is a difference between the remaining capacity of the HDR nonvolatile memory on the main memory 14 and the latest remaining capacity. Ends the remaining capacity management process 80 at the end of recording, but if there is a difference as described above, the process proceeds to step 83 where the remaining capacity of the HDR on the nonvolatile memory 13 is stored on the main memory 14. Rewrite to the latest remaining capacity of the relevant HDR.

  As a result, when recording is performed on HDR-A as shown in FIG. 9A, the GUID and remaining capacity on the nonvolatile memory 13 are as shown in FIG. 11A and shown in FIG. 9B. When recording in HDR-D as described above, the GUID and remaining capacity on the nonvolatile memory 13 are as shown in FIG. 11B, and when recording in HDR-E as shown in FIG. 9C. The GUID and remaining capacity on the nonvolatile memory 13 are as shown in FIG.

  The state of FIG. 11 (A), (B) or (C) corresponds to the state of FIG. 2, and hereinafter, the state of FIG. 11 (A), (B) or (C) will be referred to as the initial state. To do.

(2-5. Decrease or increase in remaining capacity due to recording not based on recording reservation)
The remaining capacity of the recorded HDR is reduced when the user is recording a program that is being received and viewed, or when another program is received and recorded while receiving and viewing a certain program, instead of recording as a recording reservation. To do. Conversely, when program data is deleted from a certain HDR, the remaining capacity of that HDR increases.

  Therefore, even in these cases, the CPU 11 of the receiver 10 executes the remaining capacity management process as described above, and finally determines the remaining capacity of the HDR on the nonvolatile memory 13 after data recording or data erasing. The receiver 10 is configured to rewrite the latest remaining capacity (actual remaining capacity).

[3. Other Embodiments]
The above-described example is a case where the external recording device is an HDR (Hard Disk Recorder), but the external recording device may be a DVD recorder, D-VHS, or the like. However, in that case, when presenting the remaining capacity, it is necessary to display such as “There is a possibility that the value is not correct when the recording medium is replaced”, so as not to misunderstand the user.

It is a figure which shows an example of the system of this invention. It is a figure which shows an example of the recording state of a non-volatile memory. It is a figure which shows the starting process when the power supply of a receiver is turned ON. It is a figure which shows an example of the remaining capacity list written in main memory by starting process. It is a figure which shows an example of the remaining capacity presentation process at the time of reservation setting. It is a figure which shows an example of the remaining capacity list on the main memory at the time of a video recording start. It is a figure which shows a part of example of the remaining capacity management process at the time of video recording. It is a figure which shows a part of example of the remaining capacity management process at the time of video recording. It is a figure which shows an example of the remaining capacity list | wrist on a main memory at the time of 19.5GB recording. It is a figure which shows an example of the remaining capacity management process at the time of a video recording end. It is a figure which shows an example of the recording state of the non-volatile memory after video recording.

Explanation of symbols

  Since all the main parts are described in the figure, they are omitted here.

Claims (2)

  1. A method of managing a remaining capacity of the external recording device in the television receiver of a system comprising a television receiver and a plurality of external recording devices connected thereto,
    When recording data on the recording medium of the external recording device or erasing data from the recording medium of the external recording device, the recording medium after obtaining the status from the external recording device and recording or erasing the data A remaining capacity recording step for recording the remaining capacity in a nonvolatile memory in the television receiver;
    When the power of the television receiver is turned on, the remaining capacity is read from the non-volatile memory, and the remaining capacity of the external recording device that has been accessed before is set as a remaining capacity list, and the main receiver of the television receiver is read. A boot process that writes to memory;
    When recording reservation is set in the television receiver, the remaining capacity on the main memory is converted into a recordable time, and is presented .
    At the time of recording as the execution of recording reservation, for the external recording device selected for recording, the remaining capacity on the nonvolatile memory and the latest remaining capacity indicated by the status acquired from the external recording apparatus are In addition to writing to the memory, when a difference equal to or greater than a threshold value is generated between the remaining capacity on the nonvolatile memory and the latest remaining capacity, the remaining capacity on the nonvolatile memory is rewritten to the latest remaining capacity. Remaining capacity management method.
  2. A television receiver having a function of receiving a program reserved for recording and recording it on recording media of a plurality of external recording devices connected to the receiver,
    A non-volatile memory, a main memory and a CPU are provided.
    When data is recorded on or erased from the recording medium, a status is obtained from the external recording device, and the remaining capacity of the recording medium after data recording or data erasing is stored in the nonvolatile memory. Processing to record in,
    When the receiver is turned on, the remaining capacity is read from the non-volatile memory, and the remaining capacity of the external recording device that has been accessed before is written to the main memory of the receiver as a remaining capacity list. ,
    When recording reservation is set in the receiver, the remaining capacity on the main memory is converted into a recordable time, and a remaining capacity presenting step is performed.
    At the time of recording as execution of recording reservation, for the external recording device selected for recording, the remaining capacity on the nonvolatile memory and the latest remaining capacity indicated by the status acquired from the external recording device are the main recording device. When the difference between the remaining capacity on the nonvolatile memory and the latest remaining capacity is more than a threshold value, the remaining capacity on the nonvolatile memory is rewritten to the latest remaining capacity. A television receiver.
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