JP5247905B1 - Data storage device and television receiver - Google Patents

Abstract

Provided are a data storage device and a television receiver that are configured to store data in a volatile memory and that can be easily used by a user and can reduce power consumption in a power-off state.
A television receiver is configured such that power supply control unit can individually turn on / off power supply to a plurality of memory modules included in a RAM. The control unit 19 determines whether or not the data stored in the RAM 23 can be reacquired, turns on the power supply of the memory module storing the data that cannot be acquired again, and the data that cannot be acquired again The power supply of the memory modules that are not stored is turned off. In addition, the control unit 19 deletes the data that can be reacquired stored in the RAM 23 and rearranges the data that cannot be reacquired.
[Selection] Figure 1

Description

  The present invention relates to a data storage device that stores data related to television broadcasting, and a television receiver including the data storage device.

  2. Description of the Related Art Conventionally, devices that store data (hereinafter referred to as program data) such as image data and audio data related to a television broadcast program have been widely used. Such a device has a configuration in which program data is stored in a non-volatile memory such as a built-in or externally connected hard disk or flash memory, and a DVD (Digital Versatile Disk) or a BD (Blue-ray Disc), for example. There are various configurations, such as a configuration for storing program data in a storage medium. In such an apparatus, since program data is continuously stored until it is erased by a user's instruction, an apparatus having a larger storage capacity is often required.

  In Patent Document 1, in addition to a memory disk having a volatile memory used for constant recording, a drive device for a portable recording medium is provided, and a portable recording medium capable of recording is mounted when the volatile memory is always recorded. In such a case, there has been proposed a recording / reproducing apparatus configured to always perform backup recording on the portable recording medium. This recording / playback apparatus can perform follow-up playback by backing up a portable recording medium even when the external power supply is interrupted during continuous recording for follow-up playback.

  Patent Document 2 includes a plurality of memory modules having a volatile memory and a memory controller that controls reading and writing of the data, and a storage battery. A part of the memory modules is assigned as a management data module, and other memory modules are recorded. A recording device has been proposed in which the power supply control from the storage battery to the management data module is different from the power supply control from the storage battery to the recording data module when the external power supply stops when assigned as a data module. ing. Even when the external power supply is cut off, the recording device can hold the recorded data in a recoverable state for as long as possible within the limited battery capacity range of the storage battery.

JP 2010-205309 A JP 2010-130320 A

  Instead of storing program data over a long period of time, the program data is temporarily stored in order to allow the user to view the program with a slight shift from the original broadcast time. There is a device with a function to keep, so-called time shift function. In the time shift function, the storage capacity for storing the program data may be small, and it is not necessary to store the program data for a long period of time. For users who need a time shift function and do not need to store program data for a long period of time, the above-described devices equipped with a nonvolatile memory or a storage medium mounting mechanism for storing program data are expensive. Therefore, a cheaper device is desired. The nonvolatile memory also has a problem that the number of data rewrites is limited. For this reason, it is conceivable to store program data in a volatile memory such as SRAM (Static Random Access Memory) or DRAM (Dynamic Random Access Memory).

  However, volatile memory loses data when the power supply is cut off. For this reason, when the program data is stored in the volatile memory, for example, the specification is such that the program data is stored only while the apparatus is turned on, or the apparatus is not turned off (cannot be turned off). Is necessary. The specification in which program data is stored only while the apparatus is powered on has a problem that it is difficult for the user to use the time shift function. Further, the specification that does not turn off the power of the apparatus has a problem that the power consumption of the apparatus increases.

  Since the recording / reproducing apparatus described in Patent Document 1 uses a portable recording medium for backup, there is a problem that it is necessary to mount a mounting mechanism for the portable recording medium, which is expensive. The recording device described in Patent Document 2 has a problem that it is necessary to mount a storage battery for supplying power when power supply from the outside is stopped, which is expensive.

  The present invention has been made in view of such circumstances, and an object thereof is to store data in a volatile memory, which is easy for a user to use and consumes power in a power-off state. It is an object of the present invention to provide a data storage device and a television receiver capable of reducing the amount.

  A data storage device according to the present invention obtains received data related to a television broadcast in a data storage device including a volatile storage unit that stores data and a reception unit that receives an instruction for power on / off. Storage control means for storing in the volatile storage means, power supply control means for controlling on / off of power supply to the volatile storage means in accordance with an instruction received by the reception means, and the volatile storage Determining means for determining whether the data stored in the means is reacquisable data, wherein the power supply control means is configured to store the volatile storage means when data that cannot be acquired again is stored. The power supply to the volatile storage means is turned off when data that cannot be acquired again is not stored.

  The data storage device according to the present invention comprises a plurality of the volatile storage means, and the power supply control means can individually turn on / off the power supply to the plurality of volatile storage means. The power supply of the volatile storage means in which unacquireable data is stored is not turned off, and the power supply of the volatile storage means in which data that cannot be acquired again is not stored is turned off. It is characterized by.

  Further, the data storage device according to the present invention performs rearrangement for rearranging data stored in a plurality of the volatile storage means so as to store data that cannot be reacquired in a smaller number of the volatile storage means. The power supply control means further controls on / off of power supply to the volatile storage means after completion of the rearrangement by the rearrangement means.

  The data storage device according to the present invention further includes a deletion unit that deletes the data determined by the determination unit as data that can be reacquired from the volatile storage unit. It is characterized in that rearrangement is performed after deleting.

  In addition, a television receiver according to the present invention includes a receiving unit that receives a television broadcast, a display unit that displays an image related to the television broadcast received by the receiving unit, and the data storage device described above. The storage control means acquires data related to the television broadcast received by the reception means and stores the data in the volatile storage means, and the power supply control means is configured to allow the reception means to be turned off. When an instruction is received, on / off control of power supply to the volatile storage unit is performed and power supply to the display unit is turned off.

  In the present invention, data related to television broadcasting is received, and the received data is stored in the volatile storage means. Various data other than the received data may be stored in the volatile storage means. When an instruction to turn off the apparatus by an operation on the power button or an off timer function is received, it is determined whether or not the data stored in the volatile storage means is reacquisable data. For example, data that cannot be acquired after the broadcast time such as a television broadcast program is data that cannot be acquired again, and data such as a television broadcast program guide can be determined to be data that can be acquired again. In addition, for example, data stored in a nonvolatile memory in the apparatus, such as a program executed by a CPU (Central Processing Unit) of the apparatus, can be determined as data that can be acquired again. When data that cannot be re-acquired is stored in the volatile storage means, the power supply to the volatile storage means is not turned off even if a power-off instruction is received. As a result, it is possible to prevent the loss of data that cannot be reacquired due to the power supply to the volatile storage means being cut off.

  In the present invention, a plurality of volatile storage means are provided, and these can be individually controlled to turn on / off the power supply. Data relating to television broadcasting is received, and the received data is stored in any one or more volatile storage means. When an instruction to turn off the power is received, on / off of power supply to each volatile storage unit is individually controlled according to whether data that cannot be acquired again is stored in each volatile storage unit. As a result, it is possible to prevent the data from being lost by turning off the power supply to the volatile storage unit storing the data that cannot be acquired again. Further, the power consumption can be reduced by turning off the power supply to the volatile storage means in which data that cannot be acquired again is not stored.

  Further, in the present invention, data rearrangement is performed on a plurality of volatile storage units so as to reduce the number of volatile storage units that store data that cannot be reacquired. Thereby, a plurality of volatile storage means can be used efficiently, and the power consumption can be further reduced by turning off the power supply to the volatile storage means in which data that cannot be reacquired after relocation is not stored.

  In the present invention, the data determined to be reacquired is deleted from the volatile storage means, and then the data is rearranged. Thereby, the volatile storage means can be used more efficiently.

  In the present invention, the television receiver includes display means such as a liquid crystal panel or PDP (Plasma Display Panel) for displaying an image relating to the received television broadcast or data stored in the volatile storage means. When an instruction to turn off the power is received, the power supply on / off control of the volatile storage unit as described above is performed and the power supply to the display unit is turned off. Since the display means has a large amount of power consumption, turning off the power supply to the display means has a great effect on reducing the power consumption of the television receiver.

  According to the present invention, the power supply of the volatile storage means can be turned on / off according to whether or not data that cannot be re-acquired is stored, so that the power of the apparatus can be turned off. Since data that cannot be acquired again is not lost even when the power is turned off, an apparatus that is easy for the user to use can be realized. In addition, it is possible to turn on / off the power supply of a plurality of volatile storage means individually, and to turn off the power supply of the volatile storage means that does not store data that cannot be re-acquired. Since power needs to be supplied only to the means, power consumption can be reduced in the power-off state.

It is a block diagram which shows the structure of the television receiver which concerns on embodiment of this invention. It is a schematic diagram for demonstrating the power supply control of RAM by a power supply control part. It is a schematic diagram for demonstrating the data rearrangement of RAM. It is a schematic diagram for demonstrating the data rearrangement of RAM. It is a state transition diagram of the control part 19 which concerns on an electric power supply stop process. 4 is a flowchart illustrating a procedure of power supply stop processing performed by the television receiver according to Embodiment 1; 12 is a flowchart illustrating a procedure of power supply stop processing performed by the television receiver according to the second embodiment.

(Embodiment 1)
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. FIG. 1 is a block diagram showing a configuration of a television receiver according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a television receiver which receives a television broadcast by the tuner unit 11, displays an image relating to the received television broadcast program on the display unit 15, and outputs sound from the speaker 18. A remote controller (hereinafter referred to as a remote controller) 9 is attached to the television receiver 1, and a user can operate the television receiver 1 by operating an operation unit 91 provided on the remote controller 9. .

  The tuner unit 11 of the television receiver 1 is connected to an antenna (not shown). The tuner unit 11 receives the specific television broadcast selected by the channel selection unit 21 and supplies the received signal to the demodulation unit 12. In the present embodiment, the television receiver 1 receives a digital television broadcast. However, the present invention is not limited to this, and an analog television broadcast may be received. The demodulator 12 demodulates the received signal to generate digital data related to the television broadcast, and supplies the digital data to the separator 13.

  The digital data that the demodulator 12 gives to the separator 13 includes image data and audio data of a program related to television broadcasting, program information, and the like. The separation unit 13 separates the given digital data into image data, audio data, program information, and the like. The separating unit 13 gives the separated image data to the image processing unit 14, gives the sound data to the sound processing unit 17, and gives the program information to the program information processing unit 16. Further, the separation unit 13 provides image data, audio data, program information, and the like to the data control unit 20.

  The image processing unit 14 decodes the image data given from the separation unit 13, performs various image processing such as gamma correction, and converts the image data into an image signal suitable for display on the display unit 15. The signal is output to the display unit 15. The display unit 15 is configured using a display device such as a liquid crystal panel. The display unit 15 displays an image based on the image signal given from the image processing unit 14.

  The program information given from the separation unit 13 to the program information processing unit 16 includes a list of programs scheduled to be broadcast (so-called program guide), information about each program (for example, information on performers and production years if the program is a movie), etc. It is. Since the program information processing unit 16 displays program information on the display unit 15 in response to a user operation, the program information processing unit 16 extracts necessary program information and gives it to the image processing unit 14. The image processing unit 14 displays the program information given from the program information processing unit 16 on the display unit 15.

  The audio processing unit 17 decodes the audio data supplied from the separation unit 13 and outputs an audio signal amplified to a volume set by the user to the speaker 18. The speaker 18 performs audio output based on the audio signal given from the audio processing unit 17.

  The television receiver 1 includes a control unit 19, a data control unit 20, a channel selection unit 21, an infrared light receiving unit 22, a RAM (Random Access Memory) 23, a ROM (Read Only Memory) 24, a power supply control unit 25, and the like. These units exchange data via the bus 26. Although not shown, the image processing unit 14, the program information processing unit 16, and the audio processing unit 17 are also connected to the bus 26, and data can be exchanged via the bus 26. The control unit 19 is configured using an arithmetic processing device such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), and controls the operation of each unit in the television receiver 1. The control unit 19 performs control processing by reading and executing a control program stored in advance in the ROM 24.

  The data control unit 20 performs a process of storing the data given from the separation unit 13 in the RAM 23. Further, the data control unit 20 reads out the data stored in the RAM 23 and supplies the data to the image processing unit 14, the program information processing unit 16, or the audio processing unit 17, thereby performing image display and audio output of the stored program. Thereby, the user can view the program stored in the RAM 23 (so-called recording) at a time different from the broadcast time of the program.

  The channel selection unit 21 controls selection (channel selection) of the television broadcast received by the tuner unit 11. The user can perform a channel selection operation (channel change operation) using the remote controller 9 or the like, and the channel selection operation performed by the user is notified to the channel selection unit 21, and the channel selection unit 21 uses the tuner unit 11 according to the operation content. Take control.

  The infrared light receiving unit 22 is for performing infrared communication with the remote controller 9. The remote controller 9 is provided with an infrared light emitting unit (not shown), and an infrared signal corresponding to an operation performed on the operation unit 91 is transmitted from the infrared light emitting unit, and the infrared light receiving unit of the television receiver 1 is transmitted. 22 is received. The infrared light receiving unit 22 notifies the control unit 19, the channel selection unit 21, and the like of the operation performed on the remote controller 9 according to the received infrared signal. The operation unit 91 of the remote controller 9 is provided with various buttons such as a channel selection button for channel selection operation, a volume button for volume adjustment, and a setting button for setting image quality and the like. In particular, in the present embodiment, the operation unit 91 has a power button for performing power on / off operation of the television receiver 1 and an operation related to a time shift function (details will be described later). One or a plurality of buttons.

  The RAM 23 is configured using a volatile memory element such as SRAM or DRAM. The RAM 23 stores data such as image data, audio data, and program information given from the data control unit 20. Further, the RAM 23 stores a program executed by the control unit 19 and data necessary for execution read out from the ROM 24 and stored therein. Further, the RAM 23 stores various temporary data such as calculation results generated in the process of the control unit 19. Thus, the RAM 23 is used to store various data in the television receiver 1. Although details will be described later, the RAM 23 of the television receiver 1 according to the first embodiment is configured as an aggregate of a plurality of memory modules so that each memory module can individually control power on / off. It is configured.

  The ROM 24 is configured using a nonvolatile memory element such as a mask ROM, an EEPROM (Electrically Erasable Programmable ROM), or a flash memory. The ROM 24 stores various programs executed by the control unit 19 and data necessary for execution. Further, when the ROM 24 is composed of a data rewritable EEPROM or flash memory, various setting information of the television receiver 1 may be stored in the ROM 24.

  The power supply control unit 25 is supplied with AC power from a commercial AC power source connected via a power cord (not shown). The power supply control unit 25 converts the AC power into DC power and supplies it to each unit in the television receiver 1. On / off of power supply to each unit by the power supply control unit 25 is performed according to an operation on a power button provided on the operation unit 91 of the remote controller 9. When the power-off operation is performed by the remote controller 9, the power-off operation is notified from the infrared light receiving unit 22 to the control unit 19, and after the control unit 19 performs a predetermined end process, the power supply control unit 25 is instructed to turn off the power. In response to this command, the power supply control unit 25 turns off the power supply to each unit. However, at this time, the power supply control unit 25 does not turn off all the power supply in the television receiver 1, but maintains the on state for the power supply to necessary portions. On the other hand, when a power-off operation is performed with a power button (not shown) provided on the main body of the television receiver 1, the power supply control unit 25 turns off all power supply (or The supply of AC power to the power supply control unit 25 may be turned off). When the remote controller 9 performs a power-on operation, the infrared light receiving unit 22 notifies the control unit 19 of the power-on operation, and the control unit 19 gives a power-on command to the power supply control unit 25. Then, the power supply control unit 25 turns on the power supply to each unit. For this reason, at least the control unit 19 and the infrared light receiving unit 22 are not turned off by the power supply control unit 25 in response to the power-off operation of the remote controller 9.

  The television receiver 1 stores data such as image data and audio data related to television broadcasting in the RAM 23, and has a time shift function that enables the program to be viewed with a delay from the original broadcasting time. . For example, when the user operates a recording start button of the time shift function provided on the operation unit 91 of the remote controller 9, the tuner unit 11 starts storing (recording) data related to the television broadcast being received in the RAM 23. Can be made. Further, for example, the user can set the recording reservation of data by setting the start time and the end time in advance or by selecting a program from the program guide. In this case, the television receiver 1 Starts storing data in the RAM 23 at the set start time.

  When the data storage start timing is reached, the data control unit 20 of the television receiver 1 sequentially stores data (program data) such as image data and audio data supplied from the separation unit in an empty area of the RAM 23. The program data stored in the RAM 23 by the data control unit 20 may further include not only image data and audio data but also other information such as program information or captions. After that, for example, when the recording stop button of the time shift function provided on the operation unit 91 of the remote controller 9 is operated by the user, or when the set end time is reached, the data storage stop timing is reached. In this case, the data control unit 20 of the television receiver 1 stops storing program data in the RAM 23.

  When viewing the program data stored in the RAM 23, the user operates, for example, a playback button provided on the operation unit 91 of the remote controller 9. Thereby, the data control unit 20 of the television receiver 1 reads the program data from the RAM 23, gives the image data to the image processing unit 14, and gives the audio data to the sound processing unit 17. As a result, an image of the stored program data is displayed on the display unit 15 and audio is output from the speaker 18 so that the user can view the program.

  After viewing the program related to the program data stored in the RAM 23 (the program may not be viewed), the user operates the data delete button provided on the operation unit 91 of the remote controller 9, for example, to display the program data. It can be deleted and the free space of the RAM 23 can be increased. The program data stored in the RAM 23 is deleted by the data control unit 20 or the control unit 19.

  Thus, the television receiver 1 can store program data in the RAM 23. However, since the RAM 23 is composed of volatile memory elements, data cannot be retained when power supply is cut off. Therefore, the television receiver 1 according to the present embodiment stores the program data in the RAM 23 so that the program data is not lost when the user performs a power-off operation using the power button provided on the operation unit 91 of the remote controller 9. The power supply control unit 19 and the power supply control unit 25 control the power supply.

  FIG. 2 is a schematic diagram for explaining the power supply control of the RAM 23 by the power supply control unit 25. The RAM 23 is configured using N memory modules (in FIG. 2, each memory module is described as RAM (n), where n = 1, 2,..., N). Each memory module RAM (n) is connected to the power supply control unit 25 by an individual power supply wiring 27. The power supply control unit 25 can individually control on / off of power supply to each memory module RAM (n) by switching output of power to each power supply wiring 27 individually. However, when data is stored in and read from the RAM 23 via the bus 26, the control unit 19 and the data control unit 20 and the like have the RAM 23 composed of a plurality of memory module RAMs (n) in a common address space. Can be accessed. The power supply control unit 25 determines which of the N memory modules RAM (n) is supplied with power and to which of the power supply is stopped based on an instruction given from the control unit 19. To do.

  The control unit 19 determines whether each data is reacquisable data according to the type of data stored in each memory module RAM (n) of the RAM 23. For example, the program executed by the control unit 19 and the data necessary for execution are read out from the ROM 24 and stored in the RAM 23, but the data stored in the ROM 24 can be reacquired in this way. Can be determined to be correct data. Further, for example, among the data related to television broadcasting received by the tuner unit 11, the data of the program guide can be reacquired. On the other hand, television broadcast program data cannot be received by the tuner unit 11 after a predetermined broadcast time has elapsed, and it can be determined that the program data is data that cannot be reacquired.

  In order to prevent the power supply to the memory module RAM (n) in which data that cannot be acquired again is turned off, in other words, the control unit 19 is a memory module RAM in which only data that can be acquired again is stored. A power supply stop command for the RAM 23 is given to the power supply control unit 25 so that power supply to (n) and the memory module RAM (n) in which no data is stored is turned off. For example, the control unit 19 gives a power supply stop command specifying the number of the memory module RAM (n) that stops power supply. The power supply control unit 25 stops power supply to the memory module RAM (n) designated by the power supply stop command.

  Further, the control unit 19 rearranges the data stored in the RAM 23 in order to reduce the number of memory module RAM (n) in which data that cannot be acquired again is stored. 3 and 4 are schematic diagrams for explaining the data rearrangement of the RAM 23. FIG. In the illustrated example, the RAM 23 includes four memory module RAMs (1) to (4). Further, it is assumed that the memory module RAM (1) is on the head side and the memory module RAM (4) is on the tail side of the address space.

  The left side of FIG. 3 shows an example of data stored in the RAM 23 during normal operation of the television receiver 1. In this example, program 1, program data 1, program 2, program guide and program data 2 are stored in the RAM 23 in this order from the head of the address. The program 1 is read from the ROM 24 by the control unit 19 and stored in the RAM 23, and is stored in the top portion of the memory module RAM (1). Program data 1 is data stored in the RAM 23 by the data control unit 20 from the separation unit 13, and is stored across the memory modules RAM (1) and (2) following the program 1. . Like the program 1, the program 2 is read from the ROM 24 and stored in the RAM 23 by the control unit 19, and is stored across the memory module RAMs (2) and (3) following the program data 1. The program guide stores data provided from the separation unit 13 by the data control unit 20 in the RAM 23, and is stored in the memory module RAM (3) following the program 2. Similar to the program data 1, the program data 2 is obtained by storing the data given from the separation unit 13 in the RAM 23 in the memory module RAM (3) and (4) following the program guide. It is memorized across.

  In order to perform the data rearrangement of the RAM 23, the control unit 19 first determines whether or not the data stored in the RAM 23 can be reacquired. In the illustrated example, the control unit 19 determines that the program 1, the program 2, and the program table can be acquired again, and determines that the program data 1 and the program data 2 cannot be acquired again. As shown on the right side of FIG. 3, the control unit 19 deletes the program 1, program 2, and program guide data determined to be reacquired from the RAM 23. As a result, an empty area is secured between the head portion of the RAM 23 and the program data 1 and program data 2. Note that a minimum program (not shown) for the data relocation by the control unit 19 is stored in the RAM 23, or the data relocation function is realized by hardware in the control unit 19. .

  Next, as shown on the left side of FIG. 4, the control unit 19 moves (rearranges) the storage positions of the program data 1 and the program data 2 to the head side of the RAM 23. Thereby, the program data 1 and the program data 2 are stored across the memory module RAM (2) from the top of the memory module RAM (1) of the RAM 23, and the data is stored in the memory module RAM (3) and (4). Not in a state. Therefore, the control unit 19 gives a power supply stop command to the power supply control unit 25 in order to stop the power supply of the memory modules RAM (3) and (4). In response to this, the power supply control unit 25 stops power supply to the memory module RAMs (3) and (4) and supplies power to the memory module RAMs (1) and (2) as shown on the right side of FIG. Maintain.

  FIG. 5 is a state transition diagram of the control unit 19 according to the power supply stop process. Regarding the power supply stop processing, the control unit 19 performs processing while transitioning between three states of an AC off state, a state without program data, and a state with program data. In this state transition, a state in which the power switch of the main body of the television receiver 1 is turned off and the power supply is completely cut off is regarded as one state transition as an AC off state. When a power switch or the like of the main body of the television receiver 1 is turned on, power is supplied to each part of the television receiver 1, and the control unit 19 shifts to a no program data state as an initial state. Further, regardless of the state of the control unit 19, if the power switch of the main body is turned off, the control unit 19 transitions to the AC off state.

  In the state where there is no program data, when a power-off operation is accepted by the operation unit 91 of the remote controller 9, the control unit 19 does not perform the state transition and stops the power supply of each unit including all the memory modules RAM (n) of the RAM 23. An instruction is given to the power supply control unit 25. When an operation for deleting program data is performed in the state where there is no program data, the control unit 19 does not perform state transition because there is no data to be deleted in the RAM 23. Further, when the program storage (recording) start timing is reached in the absence of program data, the control unit 19 transitions to the program data present state, and the data control unit 20 stores the data in the RAM 23.

  When a power-off operation is accepted by the operation unit 91 of the remote controller 9 in the state where there is program data, the control unit 19 does not perform the state transition and re-acquires after performing the data rearrangement of the RAM 23 as described above. The power supply control unit 25 is supplied with a power supply stop command for each unit including the memory module RAM (n) in which impossible data is not stored. When the program recording start timing is reached in the program data present state, the control unit 19 stores data in the RAM 23 by the data control unit 20 without performing the state transition. When a part of program data in the RAM 23 is deleted by the data deletion operation on the operation unit 91 of the remote controller 9 in the state with the program data, the program data remains in the RAM 23, so the state transition is not performed. Further, in the state where there is program data, when all program data in the RAM 23 is deleted by the data deletion operation on the operation unit 91 of the remote controller 9, the control unit 19 transitions to a state where there is no program data.

  FIG. 6 is a flowchart illustrating a procedure of power supply stop processing performed by the television receiver 1 according to the first embodiment. The control unit 19 of the television receiver 1 determines whether or not the power-off operation has been performed by the operation unit 91 of the remote controller 9 according to the presence or absence of the power-off notification from the infrared light receiving unit 22 (step S1). When the power-off operation is not performed (S1: NO), the control unit 19 waits until the power-off operation is performed. When the power-off operation is performed (S1: YES), the control unit 19 performs a process stop control of each operating unit or a termination process such as saving the setting information to the ROM 24 (step S2), and the power supply control unit 25. A process for stopping the power supply to each unit by giving a power-off command to is performed (step S3). In step S3, for example, power supply to the tuner unit 11, the demodulation unit 12, the separation unit 13, the image processing unit 14, the display unit 15, the program information processing unit 16, the audio processing unit 17, and the speaker 18 is stopped.

  Next, the control unit 19 determines whether or not each data stored in the RAM 23 is reacquisable data according to the type of data (step S4). The control unit 19 may determine, for example, program data as non-retrievable data, determine data other than program data as re-obtainable data, and, for example, data other than program data that cannot be re-acquired There may be data to be determined. The control unit 19 deletes data determined to be reacquired from the RAM 23 (step S5).

  The control unit 19 determines whether data (data that cannot be acquired again) exists in the RAM 23 (step S6). When data exists in the RAM 23 (S6: YES), the control unit 19 performs a data rearrangement process for moving the data to the head side of the RAM 23 (step S7), and advances the process to step S8. If there is no data in the RAM 23 (S6: NO), the control unit 19 advances the process to step S8 without performing the data rearrangement process. Next, the control unit 19 performs a power supply stop process by the power supply control unit 25 by giving a command to stop the power supply to the memory module RAM (n) in which the non-retrievable data in the RAM 23 is not stored. (Step S8), and the process ends.

  The television receiver 1 having the above configuration is configured such that the power supply control unit 25 can individually turn on / off the power supply to the plurality of memory modules RAM (n) included in the RAM 23, and data that cannot be reacquired is stored. The power supply of the stored memory module RAM (n) is turned on, and the power supply of the memory module RAM (n) in which data that cannot be acquired again is not stored is turned off. As a result, even when the television receiver 1 is in a power-off state, the power supply of the memory module RAM (n) in which data that cannot be re-acquired such as program data is stored is on. The non-re-retrievable data stored in the RAM 23 is not lost. Further, since the power supply of the memory module RAM (n) in which data that cannot be acquired again is not stored, the television receiver 1 is compared with the configuration in which all the power supplies of the RAM 23 are turned on. Power consumption can be reduced.

  Therefore, it is not necessary to provide a non-volatile memory for storing program data, and a low-cost television receiver 1 can be realized. Even when the program data is stored in the volatile RAM 23, the power of the television receiver 1 can be turned off, and data that cannot be acquired again is not lost even when the power is turned off. Therefore, the television receiver 1 that is easy for the user to use can be provided.

  Further, by deleting data that can be reacquired such as a program or a program table stored in the RAM 23 and rearranging data that cannot be reacquired such as program data, data that cannot be reacquired is arranged. Since the number of stored memory module RAM (n) can be reduced, the RAM 23 can be used efficiently, and the power supply of more memory module RAM (n) can be turned off, the power consumption of the television receiver 1 The amount can be further reduced.

  In the present embodiment, the television receiver 1 is described as an example of a device for storing program data and the like, but the application of the present invention is not limited to this. For example, the present invention can be applied to various devices such as a tuner device that receives a television broadcast, a mobile phone having a television broadcast viewing function, or a portable information terminal.

  The television receiver 1 is configured to receive digital television broadcasts, but is not limited thereto, and may be configured to receive analog television broadcasts. Both digital and analog television broadcasts may be used. May be received. The television receiver 1 may be configured to include a plurality of tuner units 11. Moreover, although the control part 19 and the data control part 20 were provided in the television receiver 1, it is not restricted to this, The structure in which the control part 19 combines the function of the data control part 20 may be sufficient. In addition, the power supply is partially turned off in the RAM 23 when the operation unit 91 of the remote controller 9 is turned off. However, the present invention is not limited to this, and is provided in the main body of the television receiver 1. A configuration may be adopted in which partial power supply off of the RAM 23 is performed when a power-off operation is performed by the operation unit. In the case of this configuration, the television receiver 1 may not have the remote controller 9. Similarly, for example, when the power of the television receiver 1 is turned off at a set time by the off timer function, or when the television receiver 1 is turned off after the recording related to the reservation setting is finished, for example, Power supply off control may be performed.

(Embodiment 2)
The television receiver 1 according to the first embodiment described above has a configuration in which the RAM 23 includes a plurality of memory modules RAM (n) that the power supply control unit 25 can individually control on / off of power supply. In contrast, in the television receiver 1 according to the second embodiment, the power supply control unit 25 collectively controls the power on / off of the entire RAM 23. In the case of this configuration, the control unit 19 of the television receiver 1 according to Embodiment 2 does not perform processing such as deletion of data that can be reacquired stored in the RAM 23 and data rearrangement of the RAM 23, and re-stores in the RAM 23. It is determined whether or not to turn off the power supply of the RAM 23 depending on whether or not data that cannot be acquired is stored.

  FIG. 7 is a flowchart illustrating a procedure of power supply stop processing performed by the television receiver 1 according to the second embodiment. The control unit 19 of the television receiver 1 according to Embodiment 2 determines whether or not the power-off operation has been performed by the operation unit 91 of the remote controller 9 (step S11), and when the power-off operation has not been performed (step S11). S11: NO), and waits until the power-off operation is performed. When the power-off operation is performed (S11: YES), the control unit 19 performs various end processes (step S12), and stops power supply to each unit by giving a power-off command to the power supply control unit 25. Processing is performed (step S13). In step S13, for example, power supply to the tuner unit 11, the demodulation unit 12, the separation unit 13, the image processing unit 14, the display unit 15, the program information processing unit 16, the audio processing unit 17, and the speaker 18 is stopped.

  Next, the control unit 19 determines whether each data stored in the RAM 23 is reacquisable data according to the type of data (step S14). From the determination result, the control unit 19 determines whether there is data that cannot be acquired again in the RAM 23 (step S15). When there is no data in the RAM 23 (S15: NO), the control unit 19 gives a power supply stop command to the RAM 23 to perform a power supply stop process by the power supply control unit 25 (step S16), and ends the process. . When data exists in the RAM 23 (S15: YES), the control unit 19 ends the process without stopping the power supply to the RAM 23.

  In the television receiver 1 according to the second embodiment having the above configuration, if data that cannot be acquired again is stored in the RAM 23 when the power is turned off by the operation unit 91 of the remote controller 9, the power of the RAM 23 is restored. Does not turn off the supply. Thereby, the television receiver 1 can prevent the non-re-acquireable data stored in the RAM 23 from being lost due to power-off. In addition, the television receiver 1 stops power supply to the image processing unit 14 and the display unit 15 even if data that cannot be re-acquired is stored in the RAM 23, thereby reducing power consumption when the power is turned off. it can.

  In addition, since the other structure of the television receiver 1 which concerns on Embodiment 2 is the same as that of the structure of the television receiver 1 which concerns on Embodiment 1, it attaches | subjects the same code | symbol to the same location, and details The detailed explanation is omitted.

  In the first and second embodiments, all the non-reacquireable data such as program data is stored in the volatile RAM 23. However, the present invention is not limited to this. A part of the non-re-obtainable data may be stored in the RAM 23 and the rest may be stored in a non-volatile memory element (for example, a flash memory or an EEPROM) in which data can be rewritten. For example, information for managing program data can be stored in the RAM 23, and the program data can be stored in a nonvolatile memory element. In such a configuration, when the power is turned off by the remote controller 9, the television receiver 1 turns off the power supply to the non-volatile memory element, and the power supply to the RAM 23 depends on the presence / absence of non-retrievable data. The above control may be performed.

1 Television receiver (data storage device)
9 Remote controller 11 Tuner (Receiving means)
14 Image processing unit 15 Display unit (display means)
16 Program information processing unit 17 Audio processing unit 18 Speaker 19 Control unit (determination unit, rearrangement unit, deletion unit)
20 Data control unit (storage control means)
23 RAM (volatile storage means)
25 Power supply control unit (power supply control means)
91 Operation part (reception means)
RAM (n) memory module (volatile storage means)

Claims (5)

In a data storage device comprising: a volatile storage unit that stores data; and a reception unit that receives an instruction related to power on / off.
Storage control means for acquiring data relating to the received television broadcast and storing it in the volatile storage means;
Power supply control means for controlling on / off of power supply to the volatile storage means according to an instruction received by the reception means;
Determination means for determining whether or not the data stored in the volatile storage means is reacquisable data, and
The power supply control means includes
Without turning off the power supply of the volatile storage means when data that cannot be reacquired is stored,
A data storage device characterized in that the power supply to the volatile storage means is turned off when data that cannot be acquired again is not stored. A plurality of the volatile storage means;
The power supply control means includes
The power supply to the plurality of volatile storage means can be individually turned on / off,
Without turning off the power supply of the volatile storage means in which data that cannot be acquired again is stored,
The data storage device according to claim 1, wherein power supply to the volatile storage means in which data that cannot be acquired again is not stored is turned off. Relocation means for relocating data stored in a plurality of the volatile storage means in order to store data that cannot be reacquired in a smaller number of the volatile storage means;
3. The data according to claim 2, wherein the power supply control unit performs on / off control of power supply to the volatile storage unit after completion of the rearrangement by the rearrangement unit. 4. Storage device. A deletion unit that deletes the data determined by the determination unit as data that can be reacquired from the volatile storage unit;
The data storage device according to claim 3, wherein the rearrangement unit performs rearrangement after the deletion unit deletes data. Receiving means for receiving a television broadcast;
Display means for displaying an image relating to television broadcast received by the receiving means;
A data storage device according to any one of claims 1 to 4, and
The storage control means acquires data related to the television broadcast received by the receiving means and stores the data in the volatile storage means,
The power supply control unit performs on / off control of power supply to the volatile storage unit and turns off the power supply to the display unit when the reception unit receives an instruction to turn off the power. A television receiver characterized by that.

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