JP5846795B2 - Digital recording / reproducing device - Google Patents

Description

  The present invention receives a digital television broadcast, etc., and receives the received broadcast program as an optical disk such as a Blu-ray Disc (registered trademark) or a DVD, or a magnetic disk such as a hard disk drive (HDD). In particular, the present invention relates to a digital recording / reproducing apparatus that further includes a semiconductor memory such as an SSD (Solid State Drive) in addition to the disk recording medium.

In a conventional digital recording / reproducing apparatus, in a preparation period for starting an optical disk or a magnetic disk at the start of recording data (information) on an optical disk or a magnetic disk, a semiconductor memory such as a cache memory having a good startup response (rise) On the other hand, a technique for temporarily storing data is known (see, for example, Patent Document 1). During the preparation period at the start of recording, the first scene of information that should be recorded on the disk is temporarily recorded in the semiconductor memory, so that the video during the preparation period can be recorded or reproduced. Usability can be improved.

Japanese Patent No. 4279723 (FIG. 1)

However, in Patent Document 1, there is a problem that the power consumption increases because the semiconductor memory and the hard disk are simultaneously used (operated) during recording. In addition, although the usability at the start of recording is improved, when playing a recorded broadcast program after the recording is finished and the digital recording / reproducing apparatus is turned off, the hard disk is turned on after the digital recording / reproducing apparatus is turned on. It was necessary to wait until the start-up of the computer was completed, and the improvement in user convenience was limited.

  The present invention has been made to solve these problems, and it is an object of the present invention to provide a digital recording / reproducing apparatus capable of reducing power consumption and improving user-friendliness.

In order to solve the above-described problems, a digital recording / reproducing apparatus according to the present invention includes a receiving unit that receives a digital broadcast signal including a broadcast program, and a broadcast program to be recorded from the digital broadcast signal received by the receiving unit. Program data extracting means for extracting program data; first and second recording means each including a semiconductor recording medium and a disk recording medium for recording program data extracted by the program data extracting means; and first recording means And data transfer means for transferring program data from the first recording means to the second recording means. When recording the program data, the first recording means records the program data with less power consumption than the second recording means. , upon transferring the program data, the time required for transfer is shorter than the time required for recording from the program start of the program data to the first recording means, the data transfer Stage, before the recording of the program data to the first recording means is completed, characterized in that to start the transfer.

According to the present invention, receiving means for receiving a digital broadcast signal including a broadcast program, program data extracting means for extracting program data of a broadcast program to be recorded from the digital broadcast signal received by the receiving means, and program data First and second recording means each having a semiconductor recording medium and a disk recording medium for recording program data extracted by the extracting means, and transfer of program data from the first recording means to the second recording means The first recording means records the program data with less power consumption than the second recording means, and when transferring the program data, the time required for the transfer is as follows. , shorter than the time required for recording from the program start of the program data to the first recording means, the data transfer means, the recording of the program data to the first recording means is completed From before, to initiate the transfer, thus reducing power consumption amount, it is possible to improve the usability of the user.

It is a block diagram which shows the structure of the digital recording / reproducing apparatus by Embodiment 1 of this invention. It is a flowchart which shows an example of the operation | movement of the reservation recording of the program in the digital recording / reproducing apparatus by Embodiment 1 of this invention. It is a block diagram which shows the structure of the digital recording / reproducing apparatus by Embodiment 2 of this invention. It is a figure which shows an example of the list screen of the recorded broadcast program in the digital recording / reproducing apparatus by Embodiment 2 of this invention. It is a flowchart which shows an example of the operation | movement of the reservation recording of the program in the digital recording / reproducing apparatus by Embodiment 2 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
FIG. 1 is a block diagram showing a configuration of a digital recording / reproducing apparatus 100 according to Embodiment 1 of the present invention. In the first embodiment, program data that is currently being recorded in the semiconductor memory 105 is transferred to the disk recording medium 106 after the recording to the semiconductor memory 105 is completed, or to the disk recording medium 106 immediately before the recording to the semiconductor memory 105 is completed. It is a form to transfer.

  As shown in FIG. 1, a digital recording / reproducing apparatus 100 according to the first embodiment includes an antenna 101 installed outside the digital recording / reproducing apparatus 100 for receiving digital broadcast waves, and a digital tuner 102 (receiving means). A transport stream decoder 103, a stream controller 104, a semiconductor memory 105 (first recording means) such as an SSD, a disk recording medium 106 (second recording means) such as an optical disk or an HDD, and an AV decoder. 107. In addition, a CPU 109 (Central Processing Unit), a ROM (Read Only Memory) 110 that stores a program used for the processing of the CPU 109, and a RAM 111 (Random Access Memory) used for a work area of the CPU 109 are provided. The semiconductor memory power supply device 113 that controls power supply to the semiconductor memory 105 and the disk recording medium power supply device 114 that controls power supply to the disk recording medium 106 are also provided. Control of power supply to the semiconductor memory 105 and the disk recording medium 106 by the device 114 is controlled by the CPU 109 via the CPU bus 112.

  Next, the operation of the digital recording / reproducing apparatus 100 will be described.

  The digital tuner 102 (reception means) receives a digital broadcast wave including a broadcast program via the antenna 101, and extracts a transport stream (digital broadcast signal) from the received digital broadcast wave. A transport stream decoder 103 (program data extracting means) extracts partial data from the transport stream extracted by the digital tuner 102 only from data related to a selected broadcast program (hereinafter also simply referred to as a program). The port stream (program data) is output to the stream controller 104.

  When viewing a currently broadcast program (a program received after being selected), the partial transport stream extracted by the transport stream decoder 103 is input to the AV decoder 107 by the stream controller 104. The AV decoder 107 decodes (restores) video data and audio data of the program included in the input partial transport stream. The restored video / audio signal is output as an output video / audio signal 108 from an external output device such as a monitor (not shown) or a speaker (not shown).

  Further, when recording a currently broadcast program, the semiconductor memory power supply device 113 supplies power to the semiconductor memory 105. The partial transport stream (program data of the program to be recorded) extracted by the transport stream decoder 103 is recorded as program data in the semiconductor memory 105 by the stream controller 104. In the first embodiment, it is assumed that the semiconductor memory 105 has a capacity necessary for recording at least one program, and only the semiconductor memory 105 has power during the recording of one program. Is supplied (the semiconductor memory 105 is in a power-on state), and no power is supplied to the disk recording medium 106 (the disk recording medium 106 is in a power-off state).

  When the recording of the program ends, the disk recording medium power supply device 114 supplies power to the disk recording medium 106. The stream controller 104 (data transfer means) copies (transfers) the program data recorded in the semiconductor memory 105 from the semiconductor memory 105 to the disk recording medium 106 after the recording of the program data in the semiconductor memory 105 is completed. When the copying is completed, the stream controller 104 deletes the program data (copy source program data) recorded in the semiconductor memory 105.

  When playing back a program recorded on the disk recording medium 106, the stream controller 104 reads the program data (partial transport stream data) of the program recorded on the disk recording medium 106 and outputs it to the AV decoder 107. The AV decoder 107 decodes the video data and audio data of the program included in the input partial transport stream. The restored video / audio signal is output as an output video / audio signal 108 from an external output device such as a monitor (not shown) or a speaker (not shown).

  The series of operations described above is controlled by the CPU 109. That is, the CPU 109 controls each block (each component) via the CPU bus 112 while using the RAM 111 as a work area in accordance with a program stored in the ROM 110 in advance.

  FIG. 2 is a flowchart showing an example of the reserved recording operation of the program in the digital recording / reproducing apparatus 100 according to Embodiment 1 of the present invention. In FIG. 2, it is assumed that the digital recording / playback apparatus 100 has a timer reservation (recording reservation) for recording a program. As shown in FIG. 2, when the start time of a program reserved for recording approaches, the CPU 109 turns on power to each block (each component constituting the digital recording / reproducing apparatus 100) or broadcasts as necessary. Preparation for recording (reserved recording) reserved by controlling to receive a channel is started (step S201). Then, the CPU 109 controls the semiconductor memory power supply device 113 to supply power to the semiconductor memory 105, and turns on the semiconductor memory 105 (step S202). At this time, the disk recording medium 106 is in an OFF state.

  The CPU 109 monitors whether or not a program reserved for recording has started (step S203). When the CPU 109 detects that the program has started (Y in step S203), it starts recording program data in the semiconductor memory 105. (Step S204). Thereafter, it is monitored whether or not the program has ended while continuing to record the program data in the semiconductor memory 105 (step S205). When the end of the program is detected (Y in step S205), the program data in the semiconductor memory 105 is recorded. Recording is terminated (step S206). At this time, the recorded program data exists only in the semiconductor memory 105.

  When the recording of the program data in the semiconductor memory 105 is completed in step S206, the CPU 109 controls the disk recording medium power supply device 114 to supply power to the disk recording medium 106, and activates the disk recording medium 106. An ON state is set (step S207). When the disk recording medium 106 is turned on, the CPU 109 controls the stream controller 104 to start an operation of copying the program data recorded in the semiconductor memory 105 to the disk recording medium 106 (step S208). After the copy operation is started, it is monitored whether or not the copy has been completed while continuing to copy the program data (step S209), and if the end of the copy is detected (Y in step S209), the program remaining in the semiconductor memory 105 is monitored. Data (copy source program data) is deleted (step S210). At this time, the recorded program data exists only in the disk recording medium 106.

  After step S210, unless otherwise specified by the user, the CPU 109 turns off the semiconductor memory 105 and the disk recording medium 106 so that the semiconductor memory 105 and the disk recording medium 106 are turned off in order to return to the state before the reserved recording starts. Control is performed to cut off the supply of power to the medium power supply device 114 (step S211), and the reserved recording is terminated (step S212).

  The disk recording medium 106 such as an optical disk or an HDD has a low price per unit capacity, but generally requires a large amount of power because a motor is required to rotate the disk at high speed. On the other hand, the semiconductor memory 105 constituted by a flash memory or the like does not need a rotation mechanism like the disk recording medium 106, and thus consumes less power and has a quick startup response, but has a high price per unit capacity.

  Usually, the time required for copying the program data is shorter than the time required for recording the program (that is, the broadcast time of the program). In the first embodiment, during the recording of a program, the time for copying program data after the recording of the program to the semiconductor memory 105 is completed using the semiconductor memory 105 that has a quick activation response and low power consumption (step S207). Since the disk recording medium 106 is used only in step S211), the overall power consumption can be suppressed.

  In the first embodiment, every time recording of one program is completed, the program data is copied from the semiconductor memory 105 to the disk recording medium 106 (that is, the stream controller 104 is currently recording the program currently being recorded in the semiconductor memory 105). Immediately after the data recording is completed, the program data recorded in the semiconductor memory 105 is transferred to the disk recording medium 106), and the program data of the copy source in the semiconductor memory 105 is erased after the copying is completed. Therefore, the recording capacity of the semiconductor memory 105 may be a capacity that can store at least data for one program.

  Further, in the first embodiment, the time required for the entire reserved recording is required for the time required for copying from the semiconductor memory 105 to the disk recording medium 106. However, before the program being recorded is finished, the semiconductor recording is completed. The recorded program data in the memory 105 may be copied to the disk recording medium 106 to reduce the copying time. That is, the stream controller 104 (data transfer means) may turn on the disk recording medium 106 immediately before the completion of recording the program data in the semiconductor memory 105 and transfer the program data to the disk recording medium 106. . Note that it is desirable that the start of copying (that is, the start of step S207 in FIG. 2) is performed from the time before the scheduled end time of the program by the time required for copying. Even in this case, the stream controller 104 deletes the program data (copy source program data) recorded in the semiconductor memory 105 when the transfer of the program data from the semiconductor memory 105 to the disk recording medium 106 is completed.

  In the first embodiment, the program data is copied from the semiconductor memory 105 to the disk recording medium 106 immediately after the recording of the program data to the semiconductor memory 105 is completed. You may perform at other timings without being restricted. For example, the timing for copying once a day may be set, or the digital recording / reproducing apparatus 100 may perform copying in an unused time zone. Alternatively, copying may be performed when the free space of the semiconductor memory 105 falls below a predetermined threshold. These can also be understood as the concept of Embodiment 2 described later.

  In the first embodiment, a non-volatile memory such as an SSD configured by a flash memory or the like is used as the semiconductor memory 301. However, a volatile memory such as an SRAM (Static Random Access Memory) backed up by a battery, for example. May be used.

  In the first embodiment, the semiconductor memory power supply device 113 and the disk recording medium power supply device 114 are used to control the power supply (energization) to the semiconductor memory 105 and the disk recording medium 106. It is not always necessary to cut off the energization when the 105 and the disk recording medium 106 are turned off, and the power consumption can be reduced by using the respective standby modes of the semiconductor memory 105 and the disk recording medium 106. Good.

<Embodiment 2>
FIG. 3 is a block diagram showing a configuration of a digital recording / reproducing apparatus 300 according to Embodiment 2 of the present invention. In the second embodiment, program data that has already been recorded in the semiconductor memory 301 is transferred to the disk recording medium 106 after completion of recording in the semiconductor memory 301, or is recorded in the disk recording medium 106 immediately before completion of recording in the semiconductor memory 301. It is a form to transfer.

  As shown in FIG. 3, in the second embodiment, the semiconductor memory 301 having a larger capacity than the semiconductor memory 105 (see FIG. 1) used in the first embodiment and the program selection for selecting program data based on predetermined information. Means (CPU 109), and the stream controller 104 (data transfer means) includes program data selected by the CPU 109 (program selection means) from program data already recorded in the semiconductor memory 301 (first recording means). It is characterized by performing the transfer. Since other configurations are the same as those of the first embodiment, description thereof is omitted here.

  As described above, the semiconductor memory 301 has an advantage of low power consumption and quick start-up response. However, since the price per unit capacity is high, the recording capacity equivalent to the disk recording medium 106 can be used as an alternative to the disk recording medium 106. If it is going to be provided, the price of the digital recording / reproducing apparatus 300 will become high. On the other hand, in the first embodiment, the power consumption required for recording a program can be suppressed by taking advantage of the low power consumption of the semiconductor memory 105, but the recorded program data is a disc recording with a slow start response. Since it is stored in the medium 106, the time from when the digital recording / reproducing apparatus is turned on until the recorded program is reproduced cannot be shortened.

  In the second embodiment, the semiconductor memory 301 having a larger capacity than that of the semiconductor memory 105 used in the first embodiment is used, so that a plurality of program data can be stored and a user can play back a recorded program. By storing a program estimated to be highly likely to be stored in the semiconductor memory 301 and storing a program estimated to be unlikely to reproduce a recorded program in the disk recording medium 106, The time from turning on the power to playing back the recorded program is shortened.

  FIG. 4 is a view showing an example of a list screen of recorded broadcast programs in the digital recording / reproducing apparatus 300 according to the second embodiment of the present invention. 4A shows a program recorded in the SSD as an example of the semiconductor memory 301 as an SSD broadcast program list 400, and FIG. 4B shows a program recorded in the HDD as an example of the disk recording medium 106. Is shown as an HDD broadcast program list 401.

  The semiconductor memory 301 stores programs recorded within the past seven days (one week) from the current date (hereinafter referred to as the past seven days), and the SSD broadcast program list 400 includes the past seven days or less. A list of programs recorded in is displayed. The disc recording medium 106 stores programs recorded 8 days or more before the current date (hereinafter referred to as 8 days or more before), and the HDD broadcast program list 401 contains 8 days or more before. A list of recorded programs is displayed.

  As a general usage method of the digital recording / reproducing apparatus 300, the recorded program is often reproduced and viewed within one week after the program is recorded. For example, it is common to watch programs such as dramas that could not be watched due to late return time or to watch news programs or sports programs while the information was new. This is a common behavior. As described above, the CPU 109 (program selection means) estimates that a recently recorded program (program data selected based on predetermined information) is likely to be reproduced by the user, and starts such a program. Is recorded in the semiconductor memory 301 with a fast response. Therefore, it is possible to shorten the time from when the digital recording / reproducing apparatus 300 is turned on until the recorded program is reproduced, and the user-friendliness can be improved.

  FIG. 5 is a flowchart showing an example of the reserved recording operation of a program in the digital recording / reproducing apparatus 300 according to Embodiment 2 of the present invention. In FIG. 5, it is assumed that the digital recording / playback apparatus 300 has a timer recording (recording reservation) for recording a program. Further, steps S501 to S506 in FIG. 5 perform the same processes as steps S201 to S206 in FIG.

  When the recording of the program data in the semiconductor memory 301 is completed (step S506), the CPU 109 determines whether there is program data in the semiconductor memory 301 that has passed eight days or more (step S507). If it is determined that there is program data that has passed 8 days or more in the semiconductor memory 301 (Y in step S507), the CPU 109 controls the disk recording medium power supply device 114 to supply power to the disk recording medium 106. Then, the disk recording medium 106 is activated and turned on (step S508). When the disk recording medium 106 is turned on, the CPU 109 controls the stream controller 104 to start an operation of copying program data in the semiconductor memory 301 that has passed eight days or more to the disk recording medium 106 (step S509). After the copy operation is started, it is monitored whether or not the copy has been completed while continuing to copy the program data (step S510). Program data (copy source program data) older than one day is deleted (step S511). At this time, program data within the past seven days is stored in the semiconductor memory 301, and program data that has passed eight days or more is stored in the disk recording medium 106.

  Thereafter, when it is determined that there is no program data that has passed eight days or more in the semiconductor memory 301 (N in step S507), that is, only the program data within the past seven days is stored in the semiconductor memory 301. When it is determined that the power is supplied, the CPU 109 controls the semiconductor memory power supply device 113 and the disk recording medium power supply device 114 to shut off the power supply so that the semiconductor memory 301 and the disk recording medium 106 are turned off. (Step S512), the reserved recording is terminated (Step S513).

  With the above operation, the CPU 109 (program selection means) selects program data based on the date and time information (predetermined information) when the program data is recorded, and the program data within the past seven days is stored in the semiconductor memory 301. In the disk recording medium 106, program data that has passed 8 days or more is stored. When the user wants to reproduce and view a recorded broadcast program, after the digital recording / reproducing apparatus 300 is turned on, first, the semiconductor memory 301 with a quick activation response is activated. When the activation of the semiconductor memory 301 is completed, the SSD broadcast program list 400 is displayed on a display unit (not shown), and the user can view the program by selecting an arbitrary program from the displayed SSD broadcast program list 400 and playing it back. can do. At the same time, the disk recording medium 106 may be activated to display the HDD broadcast program list 401 on a display unit (not shown) so that programs older than 8 days can be played back.

  In the second embodiment, the program data within the past seven days is stored in the semiconductor memory 301. However, the storage period may be adjusted according to the capacity of the semiconductor memory 301. For example, without prescribing a period for storing program data in the semiconductor memory 301, a free space capable of the next scheduled recording is secured in the semiconductor memory 301, and program data is stored in the semiconductor memory 301 as much as possible. By storing, it is possible to make maximum use of the response speed of the activation of the semiconductor memory 301 to users with different frequency of scheduled recording.

  In the second embodiment, a program whose time has not elapsed since recording, that is, a recently recorded program is presumed to be a program that is highly likely to be reproduced by the user, and is stored in the semiconductor memory 301. However, among the programs stored in the semiconductor memory 301, program data reproduced by the user may be moved to the disk recording medium 106. That is, the CPU 109 (program selection means) may select program data based on information on whether or not the program data recorded in the semiconductor memory 301 has been reproduced.

  In addition, the user's operation history of the digital recording / reproducing apparatus 300 may be analyzed to predict the user's viewing preference for the broadcast program, and the program stored in the semiconductor memory 301 may be selected based on the prediction. . That is, the CPU 109 (program selection means) may select program data based on user preference information for broadcast programs. For the prediction of viewing preference, for example, the preference is predicted using character information such as a program name included in program information of digital broadcasting, program genre information such as sports and dramas, and names of program performers. There is a way. Or you may make it make a user select the program, program genre, etc. which are stored in the semiconductor memory 301. FIG.

  Further, in the second embodiment, the time required for the entire reserved recording is required for the time required for copying from the semiconductor memory 301 to the disk recording medium 106. The recorded program data in the memory 301 may be copied to the disk recording medium 106 to reduce the copying time. That is, the stream controller 104 (data transfer means) may turn on the disk recording medium 106 immediately before the completion of recording of the program data in the semiconductor memory 301 and transfer the program data to the disk recording medium 106. . It should be noted that the start of copying (that is, the start of step S508 in FIG. 5) is preferably performed from the time before the scheduled end time of the program by the time required for copying. Even in this case, the stream controller 104 deletes the program data (copy source program data) recorded in the semiconductor memory 301 when the transfer of the program data from the semiconductor memory 301 to the disk recording medium 106 is completed.

  In the second embodiment, a non-volatile memory such as an SSD configured with a flash memory or the like is used as the semiconductor memory 301. However, a volatile memory such as an SRAM backed up by a current using a battery may be used. .

  In the second embodiment, the power supply (energization) to the semiconductor memory 105 and the disk recording medium 106 is controlled using the semiconductor memory power supply device 113 and the disk recording medium power supply device 114. It is not always necessary to cut off the energization when the 105 and the disk recording medium 106 are turned off, and the power consumption can be reduced by using the respective standby modes of the semiconductor memory 105 and the disk recording medium 106. Good.

  As an application example of the present invention, the present invention can be applied to a device intended to digitally record a broadcast program or the like on a disk medium such as a digital broadcast recorder with a built-in HDD.

  DESCRIPTION OF SYMBOLS 100 Digital recording / reproducing apparatus, 101 Antenna, 102 Digital tuner, 103 Transport stream decoder, 104 Stream controller, 105 Semiconductor memory, 106 Disk recording medium, 107 AV decoder, 108 Output video / audio signal, 109 CPU, 110 ROM, 111 RAM , 112 CPU bus, 113 semiconductor memory power supply device, 114 disk recording medium power supply device, 300 digital recording / playback device, 301 semiconductor memory, 400 SSD broadcast program list, 401 HDD broadcast program list.

Claims (2)

Receiving means for receiving a digital broadcast signal including a broadcast program;
  Program data extracting means for extracting program data of a broadcast program to be recorded from the digital broadcast signal received by the receiving means;
  First and second recording means each including a semiconductor recording medium and a disk recording medium for recording the program data extracted by the program data extracting means;
  Data transfer means for transferring the program data from the first recording means to the second recording means;
With
  When recording the program data,
  The first recording means records the program data with less power consumption than the second recording means,
  When transferring the program data,
  The time required for the transfer is shorter than the time required for recording the program data from the program start to the first recording means,
  The digital recording / reproducing apparatus characterized in that the data transfer means starts the transfer before the recording of the program data to the first recording means is completed. The data transfer means erases the program data recorded in the first recording means when the transfer of the program data from the first recording means to the second recording means is completed. The digital recording / reproducing apparatus according to claim 1.

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