JP2005318321A - Video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display device which is operated when power is supplied from a mounted battery, and can perform processing having priority to either the prevention of the deterioration of image quality or the reduction of power consumption at the time of displaying a video at external equipment and at the time of displaying the video at its own device. <P>SOLUTION: This recording and reproducing device 1 compresses a broadcast program received by a tuner 13 by a recording signal processing part 15, and records it in a recording device 16, and expands the broadcasting program recorded in the recording device 16 by a reproduction signal processing part 17, and displays it at an external monitor device 19a or its own display device 21. The recording signal processing part 15 and the reproduction signal processing part 17 perform compression processing and expansion processing by a first compression rate at the time of making a monitor device 19a display the broadcasting program read from the recording device 16, and perform compression processing and expansion processing by a second compression rate which is higher than the first compression rate at the time of making the display device 21 display it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a video display device that records video acquired from the outside and displays the recorded video or video acquired from the outside. In particular, the present invention relates to a portable video display device that includes a power supply unit and is portable.

  A video cassette recorder that uses a magnetic tape as a recording medium as a recording / reproducing device that is connected to a television device and records the received broadcast program by the television broadcast on a recording medium and reproduces it on the connected television device as necessary. (VCR) is widespread. Further, in recent years, magnetic disks represented by HDD (Hard Disk Drive), DVD-RW (Digital Versatile Disk-ReWritable), DVD-R (Digital Versatile Disk-Recordable), and other writable DVDs are typical. Video disc players that use optical discs or the like as recording media have been put into practical use.

  The video disk player can simultaneously perform a writing process on a disk as a recording medium and a reading process from the disk. Therefore, in addition to the recording process of the received broadcast program and the reproduction process of the broadcast program recorded on the disk, the video disk player records the received broadcast program on the disk and sequentially reproduces the broadcast program recorded on the disk. Simultaneous recording / playback processing (time shift function) can be performed (see, for example, Patent Document 1). Thereby, the user of the video disc player can interrupt the reproduction processing of the broadcast program sequentially recorded on the disc, and can resume the reproduction processing from the point where the interruption was interrupted.

On the other hand, in recent years, various types of recording / reproducing apparatuses as described above have been actively developed for downsizing and portability. Therefore, for example, by configuring the portable DVD player so that it can be carried, it is possible to view the video and audio recorded on the DVD outdoors or at the destination.
JP-A-6-14274

  Here, it is important for a portable player to grasp the remaining capacity of a battery (hereinafter referred to as a battery). For example, when the user is watching a DVD with a DVD player, the DVD player ends the playback process being executed when the remaining battery capacity of the DVD player runs out. Similarly, even when the portable recording / reproducing apparatus reserves the recording process of the broadcast program by the user and starts the reserved recording process as the broadcast start time elapses, the remaining battery capacity is exhausted. At this point, the recording process being executed is terminated. Therefore, there is a demand for an apparatus that can accurately grasp the remaining capacity of the battery.

  The present invention has been made in view of such circumstances, and by performing compression processing at different compression rates when displaying an image with an external device and when displaying an image with its own device, image quality is improved. It is an object of the present invention to provide a video display device capable of performing processing giving priority to either prevention of deterioration or reduction of power consumption.

  Another object of the present invention is to perform both display processing and recording processing preferentially by performing either video display processing or video recording processing preferentially when the remaining battery capacity is insufficient. It is an object of the present invention to provide a video display device capable of avoiding a situation where it is interrupted by the above.

  A video display device according to the present invention includes a battery mounting unit to which a battery is mounted, a connection unit to which an external display device is connected, a recording unit for recording video acquired from the outside, and a display unit for displaying video. A detection means for detecting connection of an external display device to the connection portion, and power supplied from a battery attached to the battery attachment portion, wherein the detection means performs the connection. When detected, the first compression means for compressing the video acquired from the outside at a first compression rate and recording it on the recording unit; and the video compressed by the first compression unit and sequentially recorded on the recording unit A first decoding means for reading and decoding; a sending means for sending a video decoded by the first decoding means from the connecting section; and a battery mounted on the battery mounting section, wherein the detection is performed. Means detect the connection A second compression means for compressing a video acquired from the outside at a second compression rate higher than the first compression rate and recording the compressed image on the recording unit; and the recording unit compressed by the second compression unit And a display control unit for displaying the video decoded by the second decoding unit on the display unit.

  In the case of the present invention, in the video display device for recording the video acquired from the outside in the recording unit and displaying the video recorded in the recording unit on the display unit, power is supplied from the battery mounted in the battery mounting unit When an external display device is connected, the video from the outside is compressed at the first compression rate, temporarily recorded in the recording unit, sequentially read out, decoded, and then sent to the external display device To do. On the other hand, when power is supplied from a battery attached to the battery attachment unit and an external display device is not connected, an external video is compressed at a second compression rate higher than the first compression rate. After recording in the recording unit, the data is sequentially read out, decoded, and displayed on the display unit. Therefore, it is connected to an external display device, and the acquired video can be recorded on the recording unit after being compressed at a different compression ratio depending on whether or not the acquired video is displayed on the external display device.

  A video display device according to the present invention is a video display device that includes a battery mounting unit in which a battery is mounted, a recording unit that records video acquired from the outside, and a display unit that displays video. Alternatively, a receiving unit that receives a display instruction and a display time for displaying the video recorded in the recording unit on the display unit, and a battery mounted on the battery mounting unit when the receiving unit receives the display instruction. A detecting unit that detects a remaining capacity; a calculating unit that calculates power consumption for the display time on the display unit when the receiving unit receives the display instruction; a power consumption calculated by the calculating unit; And determining means for determining whether or not processing other than display on the display unit can be performed based on the remaining capacity detected by the detecting means.

  In the case of the present invention, in the video display device that displays the video acquired from the outside or the video recorded in the recording unit, when the display instruction and the display time for displaying the video on the display unit are received, the battery mounting unit While detecting the remaining capacity of the mounted battery, power consumption for the display time on the display unit is calculated based on the received display instruction. Further, based on the calculated power consumption and the detected remaining capacity, it is determined whether or not processing other than the display processing on the display unit based on the received display instruction can be performed. Therefore, it is possible to reliably secure the power necessary for the display processing on the display unit of the video that has received the display instruction, and execute processing according to the remaining power remaining after securing this power. Is possible.

  The video display device according to the present invention is configured such that the receiving unit receives a recording instruction and a recording time of video recording processing by the recording unit, and the calculating unit is configured to receive the recording instruction. The power consumption for the recording process is calculated when received, and the display calculated by the calculating means from the remaining capacity detected by the detecting means when the receiving means receives a recording instruction Subtracting means for subtracting power consumption with respect to the display time in the section, wherein the determining means is based on the remaining capacity calculated by the subtracting means and the power consumption for the recording process calculated by the calculating means. It is characterized in that it is configured to determine whether or not it is possible.

  In the case of the present invention, when the recording instruction and the recording time of the video recording process by the recording unit are received, the power consumption corresponding to the display time on the display unit is subtracted from the remaining capacity of the battery mounted on the battery mounting unit. At the same time, the power consumption for the recording process that received the recording instruction is calculated. Also, based on the remaining capacity obtained by subtraction and the calculated power consumption for the recording process, it is determined whether the recording process by the recording unit is possible. Therefore, when a display instruction for a display process on the video display unit is received, the recording for which the recording instruction is received after ensuring the power necessary for the display process on the video display unit that has received the display instruction is ensured. It is possible to determine whether the process can be executed.

  The video display apparatus according to the present invention is characterized in that when the determination unit determines that the recording process is not possible, the video display device includes a notification unit that notifies the fact.

  In the case of the present invention, when the remaining capacity of the battery is insufficient and the recording process in which the recording instruction is accepted cannot be executed, the user instructing the execution of the recording process is notified by notifying that effect. It becomes possible.

  The video display device according to the present invention is characterized by comprising means for stopping reception of a recording instruction by the receiving means after that time when the determining means determines that the recording process is not possible.

  In the case of the present invention, when the remaining capacity of the battery is insufficient and the recording process in which the recording instruction is accepted cannot be executed, by stopping the acceptance of the recording process execution instruction from the user after that point, It is possible to reduce unnecessary power consumption.

  The video display device according to the present invention is a video display device that includes a battery mounting unit in which a battery is mounted, a recording unit that records video acquired from the outside, and a display unit that displays video. A receiving unit that receives a recording instruction and a recording time of the reservation recording process, a detecting unit that detects a remaining capacity of the battery mounted in the battery mounting unit when the receiving unit receives the recording instruction, and the receiving unit When the means accepts the recording instruction, the display unit calculates the power consumption for the reservation recording process, the power consumption calculated by the calculation means, and the remaining capacity detected by the detection means. And determining means for determining whether or not the video can be displayed.

  In the case of the present invention, in the video display device that displays the video acquired from the outside or the video recorded in the recording unit, when the recording instruction and the recording time of the recording recording process of the video by the recording unit are received, the battery is installed And detecting the remaining capacity of the battery mounted on the unit, calculating power consumption for the reservation recording process by the recording unit based on the received recording instruction, and based on the calculated power consumption and the detected remaining capacity of the battery Then, it is determined whether or not display processing on the display unit can be performed. Therefore, it is possible to reliably secure the power necessary for the reservation recording process in which the recording instruction is accepted, and execute the video display process by the display unit according to the remaining power after securing this power. Is possible.

  The video display device according to the present invention is configured such that the accepting unit accepts a display instruction for causing the display unit to display an externally acquired video or a video recorded in the recording unit. When a display instruction is received, the display control unit includes a display control unit that displays the display-instructed video on the display unit, and the detection unit is provided on the battery mounting unit at predetermined time intervals during the display of the video on the display unit. The remaining capacity detected by the detecting means at a predetermined time interval is consumed for the reservation recording process calculated by the calculating means. It is configured to determine whether or not video display on the display unit is possible based on whether or not the power is higher than electric power.

  In the case of the present invention, when a display instruction for displaying a video acquired from the outside or a video recorded in the recording unit on the display unit is received, the display instructed video is displayed on the display unit. Further, the remaining capacity of the battery mounted on the battery mounting section is detected at a predetermined time interval during display of the video on the display section, and the remaining capacity of the battery detected at the predetermined time interval is detected by the reservation recording. It is determined whether or not video can be displayed on the display unit based on whether or not the power consumption for processing is higher. Therefore, when the recording instruction for the reservation recording process is received, it is possible to display the video on the display unit that has received the display instruction while ensuring the power necessary for the reservation recording process for which the recording instruction has been received. It is possible to determine whether or not.

  The video display device according to the present invention is configured such that when the display control unit determines that display on the display unit is not possible by the determination unit, the display on the display unit is stopped. It is characterized by.

  According to the present invention, when the remaining capacity of the battery is insufficient and display processing of the video on the display unit that has accepted the display instruction cannot be executed, the display on the display unit is stopped to Can be prevented.

  The video display device according to the present invention is characterized in that when the display control unit stops displaying on the display unit, the video display device includes a notification unit that notifies the fact.

  In the case of the present invention, the remaining capacity of the battery is insufficient, the video display process on the display unit that has accepted the display instruction cannot be executed, and the display on the display unit is informed to that effect. As a result, it becomes possible to notify the user of the reason why the display of the video on the display unit is stopped.

  The video display device according to the present invention comprises means for stopping reception of a display instruction by the reception means after that time when the determination means determines that display on the display unit is not possible. To do.

  In the case of the present invention, when the remaining capacity of the battery is insufficient and the video display process cannot be executed on the display unit that has received the display instruction, the display process display instruction from the user after that point is accepted. By stopping the operation, unnecessary power consumption can be reduced.

  In the present invention, in the video display device for recording the video acquired from the outside in the recording unit and displaying the video recorded in the recording unit on the display unit, when power is supplied from the battery mounted in the battery mounting unit, Depending on whether the externally acquired video is displayed on the connected external display device or on the display unit of its own device, the external video is compressed at different compression rates and recorded in the recording unit Let Specifically, when displaying on an external display device, an image in which image quality is prevented from being deteriorated by performing compression processing at a first compression rate lower than the second compression rate is displayed on the external display device. Can be made. In addition, when displaying on the display unit of the device itself, the compression processing performed on the video acquired from the outside and the display on the display unit by performing the compression processing at the second compression rate higher than the first compression rate. Power consumption in processing and the like can be reduced. Accordingly, it is possible to perform processing giving priority to either preventing deterioration of image quality or reducing power consumption when displaying an image on an external display device or when displaying an image on a display unit of the device itself.

  In the present invention, in a video display device that displays a video acquired from the outside or a video recorded in a recording unit, when a display instruction for displaying the video on the display unit and a display time are received, the display is based on the received display instruction. Based on the power consumption with respect to the display time on the display unit and the remaining capacity of the battery mounted on the battery mounting unit, it is determined whether processing other than the display on the display unit based on the received display instruction can be performed. To do. Therefore, it is possible to reliably secure the power necessary for the display processing on the display unit of the video that has received the display instruction. In addition, the display process can be executed with the highest priority by securing the power necessary for the display process and executing the process according to the remaining power level. This processing can also be executed.

  In the present invention, when the recording instruction and the recording time of the video recording process by the recording unit are accepted, the power consumption for the display time on the display unit is subtracted from the remaining capacity of the battery mounted on the battery mounting unit. The power consumption for the recording process in which the recording instruction is received is calculated. Further, by determining whether or not the recording process is possible based on the remaining battery capacity obtained by subtraction and the calculated power consumption for the recording process, Whether or not it is possible to execute the recording process in which the recording instruction is received after ensuring the power necessary for the display process in the display unit of the video in which the display instruction is received when the display instruction is received And can be executed if possible.

  In the present invention, when the remaining capacity of the battery is insufficient and the recording process in which the recording instruction is accepted cannot be executed, the user who has instructed the execution of the recording process can be notified by notifying that effect. The user can grasp the shortage of the remaining capacity of the battery. In addition, if the remaining capacity of the battery is insufficient and the recording process that accepted the recording instruction cannot be executed, unnecessary power consumption is stopped by stopping the acceptance of the recording process from the user after that point. Can be reduced.

  In the present invention, in a video display device that displays a video acquired from the outside or a video recorded in a recording unit, when the recording instruction and recording time of the video recording and recording process by the recording unit are received, the received recording instruction Based on the power consumption for the reservation recording process by the recording unit based on the above and the remaining capacity of the battery mounted on the battery mounting unit, it is determined whether display processing other than the reservation recording process, for example, can be performed on the display unit To do. Therefore, it is possible to reliably secure the power required for the reservation recording process in which the recording instruction has been accepted, and execute the video display process by the display unit according to the remaining power amount after securing this power. Can do.

  In the present invention, when a display instruction for displaying a video acquired from the outside or a video recorded in the recording unit on the display unit is received, the display instructed video is displayed on the display unit. Further, the remaining capacity of the battery mounted on the battery mounting section is detected at a predetermined time interval during display of the video on the display section, and the remaining capacity of the battery detected at the predetermined time interval is detected by the reservation recording. It is determined whether or not video can be displayed on the display unit based on whether or not the power consumption for processing is higher. Therefore, when the recording instruction for the reservation recording process is received, the power necessary for the reservation recording process for which the recording instruction has been received can be ensured, and the video can be displayed on the display unit that has received the display instruction. It can be determined whether or not there is, and can be executed if possible.

  In the present invention, when the remaining capacity of the battery is insufficient and the display processing of the video on the display unit that has received the display instruction cannot be executed, the display on the display unit is stopped to further increase the power. Consumption can be prevented. Further, in this case, by notifying the fact, it is possible to notify the user who has stopped the display on the display unit, and the user can grasp the battery power shortage. Furthermore, unnecessary power consumption can be reduced by stopping acceptance of display instructions for display processing from the user.

Hereinafter, a video display device according to the present invention will be described in detail with reference to the drawings showing a recording / reproducing device as an embodiment thereof.
(Embodiment 1)
FIG. 1 is a block diagram showing a configuration example of a recording / reproducing apparatus according to the first embodiment. 1 shows a recording / reproducing apparatus as a video display apparatus of the present invention. The recording / reproducing apparatus 1 includes a monitor device 19a such as a liquid crystal display television apparatus, a video cable for video signals, and audio for audio signals. It is configured to be connectable via a cable. The recording / reproducing apparatus 1 can be remotely operated by a remote control device (not shown).

  The recording / reproducing apparatus 1 in the present embodiment includes a control unit 10, a ROM 11, a RAM 12, a tuner 13, an A / D (analog / digital) converter 14, a recording signal processing unit 15, a recording device 16, a reproduction signal processing unit 17, Control signals are received from the output processing unit 18, the output terminal 19 for connecting to the monitor device 19 a via the video cable and the audio cable, the scaling unit 20, the display device 21, and the remote control device (hereinafter referred to as remote control device). A remote control receiver 22 and the like are provided, and they are connected to each other via a bus 1a.

  The control unit 10 is configured by a CPU (Central Processing Unit) having a timer (not shown), an MPU (Micro Processor Unit), or the like, and controls each of the above hardware units connected via the bus 1a. A control program stored in advance in the ROM 11 is read out to the RAM 12 as appropriate and executed. The ROM 11 stores in advance various control programs necessary for operating the recording / reproducing apparatus 1 as a video display apparatus according to the present invention. The RAM 12 is configured by SRAM, flash memory, or the like, and temporarily stores data generated when the control unit 10 executes the control program.

  The tuner 13 is a tuner for receiving, for example, a UHF television broadcast signal, a VHF television broadcast signal, a BS broadcast signal, or a CS broadcast signal, and receives an analog broadcast signal corresponding to the broadcast channel selected by the user. Input to the A / D converter 14. The A / D converter 14 converts the analog broadcast signal acquired from the tuner 13 into a digital broadcast signal and inputs the digital broadcast signal to the recording signal processing unit 15, the output processing unit 18, or the scaling unit 20. The recording signal processing unit 15 incorporates a codec that performs compression processing based on, for example, the MPEG (Moving Picture Expert Group) system in accordance with control from the control unit 10, and the broadcast signal input from the A / D converter 14 is included in the broadcast signal. The compression process is executed, and the generated compressed signal is input to the recording device 16.

  The recording device 16 includes a magnetic medium (recording unit) 16b such as a magnetic tape or a magnetic disk, an optical disc (recording unit) 16c that is a writable DVD, for example, and a magnetic medium of a compressed signal input from the recording signal processing unit 15. 16b or a switching unit 16a for switching input to the optical disc 16c. Therefore, the switching unit 16a inputs the compressed signal from the recording signal processing unit 15 to the magnetic medium 16b or the optical disc 16c according to the control from the control unit 10 and records it.

  The reproduction signal processing unit 17 has a built-in codec that performs decompression processing based on, for example, the MPEG system on the compressed signal read from the recording device 16 in accordance with control from the control unit 10, and is obtained by performing decompression processing. The broadcast signal is input to the output processing unit 18 or the scaling unit 20. The output processing unit 18 executes a predetermined process for outputting a broadcast signal acquired from the reproduction signal processing unit 17 to an external monitor device 19a, and outputs video from an output terminal (connection unit) 19 that can be connected to the monitor device 19a. The data is output to an external monitor device 19a via a cable and an audio cable. Therefore, the output processing unit 18 operates as sending means for sending a broadcast signal to the external monitor device 19a via the output terminal 19.

  The scaling unit 20 performs a predetermined process for displaying the video signal included in the broadcast signal acquired from the reproduction signal processing unit 17 on the display device 21, and outputs it to the liquid crystal driver 21 b of the display device (display unit) 21. To do. The display device 21 includes a liquid crystal display 21a and a liquid crystal driver 21b. The liquid crystal driver 21 b inputs the video signal that has been subjected to the predetermined processing by the scaling unit 20 to the liquid crystal display 21 a at a timing according to the control from the control unit 10. The liquid crystal display 21a is composed of a liquid crystal display panel in which a plurality of liquid crystal elements are arranged in a two-dimensional matrix, and displays a video signal input from the liquid crystal driver 21b. Note that the audio signal included in the broadcast signal subjected to the decompression process is input to an audio output unit (not shown).

  The remote control receiver 22 receives, for example, infrared light from the remote control device and converts it into a predetermined electrical signal, analyzes the obtained electrical signal, detects a control signal input from the remote control device, and detects the detected control signal. Notify the control unit 10. Thereby, the control part 10 reads the control program according to the control signal which the remote control receiving part 22 acquired from ROM11 to RAM12, and performs it sequentially. Note that the recording / reproducing apparatus 1 and the remote control apparatus not only perform wireless communication according to the IrDA (Infrared Data Association) standard using infrared rays, but also, for example, wireless LAN conforming to the IEEE 802.11b standard and wireless communication conforming to the Bluetooth standard. Wireless communication may be possible.

  The control unit 10 is also connected to an operation unit (not shown) having various keys that allow the user to directly operate the recording / reproducing apparatus 1, and the operation unit is operated by the user with each key. In this case, the control unit 10 is notified of a control signal corresponding to the operated key. Similar to the control signal acquired by the remote control receiving unit 22, the control unit 10 reads out a control program corresponding to the control signal sent from the operation unit from the ROM 11 to the RAM 12 and sequentially executes it.

  The recording / reproducing apparatus 1 is provided with a battery mounting portion 23, and the voltage from the battery 23 a attached to the battery mounting portion 23 is sent to each hardware part constituting the recording / reproducing apparatus 1 via a voltage supply line (not shown). By being supplied, the recording / reproducing apparatus 1 can operate. The recording / reproducing apparatus 1 may be connected to a power outlet, or a voltage supplied from the power outlet and a voltage supplied from the battery 23 may be used in combination.

  With the above-described configuration, the recording / reproducing apparatus 1 receives the broadcast signal reception function by the tuner 13, the recording function for recording the received broadcast signal in the recording apparatus 16, and the received broadcast signal or the broadcast signal recorded in the recording apparatus 16. It has a display function for displaying on the display device 21 and an output function for outputting these broadcast signals to an external monitor device 19a. In addition, the recording / reproducing apparatus 1 temporarily records the broadcast signal received by the tuner 13 on the recording apparatus 16 (magnetic medium 16b or optical disk 16c), and then displays it on the display apparatus 21 or the external monitor apparatus 19a ( (Simultaneous recording / playback function). When using this time shift function, the user is watching the broadcast program read from the recording device 16 on the display device 21 or the external monitor device 19a while recording the broadcast program that the user wants to watch on the recording device 16, so that the broadcast is desired. The viewing of the program can be interrupted.

  Here, the recording / reproducing apparatus 1 of the first embodiment responds to whether the user views the broadcast program on the external monitor device 19a or the display device 21 when the time shift function described above is executed. Thus, the compression rate in the compression processing executed by the recording signal processing unit 15 is changed. Specifically, when viewing with an external monitor device 19 a, the control unit 10 includes a recording signal processing unit (first compression unit) 15, a recording device 16, and a reproduction signal processing unit (first decoding unit) 17. Each operation is set to the high image quality mode, and each process is executed at a first compression rate lower than the second compression rate. When viewing on the display device 21, the control unit 10 performs operations of the recording signal processing unit (second compression unit) 15, the recording device 16, and the reproduction signal processing unit (second decoding unit) 17 with low image quality. The mode is set, and compression processing at a second compression rate higher than the first compression rate is executed.

  More specifically, when the control unit 10 operates as detection means for detecting whether or not the monitor device 19a is connected to the output terminal 19, and the control unit 10 detects the connection of the monitor device 19a. The recording signal processing unit 15 compresses the broadcast signal received by the tuner 13 at the first compression rate and records it in the recording device 16 while decoding the broadcast signal read from the recording device 16 by the reproduction signal processing unit 17. The data is sent to an external monitor device 19 a via the output processing unit 18 and the output terminal 19. On the other hand, when the control unit 10 does not detect the connection of the monitor device 19a, the recording signal processing unit 15 compresses the broadcast signal received by the tuner 13 at the second compression rate and records it on the recording device 16 while recording. The broadcast signal read from the device 16 is decoded by the reproduction signal processing unit 17 and input to the display device 21 via the scaling unit 20 in accordance with control from the control unit (display control means) 10.

  Thus, when the broadcast signal read from the recording device 16 is viewed on the external monitor device 19a when the time shift function is executed, the first compression rate, which is a lower compression rate than when viewed on the display device 21, is achieved. By compressing the image with the recording device 16 and recording it on the recording device 16, it is possible to display an image with the image quality prevented from being deteriorated on the external monitor device 19 a. Further, when viewing on the display device 21, the recording device 16 is compressed by the second compression rate, which is a higher compression rate than the case of viewing on the external monitor device 19a, and recorded on the recording device 16. It is possible to reduce the power consumption required for the recording process and the reproduction process in the display device 21. Therefore, it is possible to perform processing that places importance on either the degree of image quality degradation or power consumption.

  Hereinafter, in the recording / reproducing apparatus 1 having the above-described configuration, the broadcast signal received by the tuner 13 in accordance with an instruction from the user is recorded in the recording device 16, while the broadcast signal recorded in the recording device 16 is recorded on the external monitor device 19 a or itself. The simultaneous recording / playback process for playback on the display device 21 will be described. FIG. 2 is a flowchart showing a simultaneous recording / reproduction processing procedure by the recording / reproducing apparatus 1 according to the first embodiment.

  In the recording / reproducing apparatus 1, when a user operates a predetermined key of the remote controller or a predetermined key of the operation unit, a broadcast program broadcast on a desired channel is temporarily stored in the recording apparatus 16 (magnetic medium 16b or optical disk 16c). When the execution of the simultaneous recording / reproduction process (time shift process) to be recorded and displayed on the display device 21 or the external monitor device 19 a is instructed, the control unit 10 connects the external monitor device 19 a to the output terminal 19. It is determined whether or not it is performed (S1).

  When the control unit 10 determines that the monitor device 19a is connected to the output terminal 19 (S1: YES), each operation of the recording signal processing unit 15, the recording device 16, and the reproduction signal processing unit 17 is set to the high image quality mode. The broadcast signal from the channel selected by the user is received by the tuner 13 (S3), and converted into a digital broadcast signal by the A / D converter 14. Next, the control unit 10 compresses the received broadcast signal at the first compression rate corresponding to the high image quality mode by the recording signal processing unit 15 and then records the compressed signal on the magnetic medium 16b or the optical disc 16c of the recording device 16 (S4).

  The control unit 10 reads the broadcast signal recorded on the magnetic medium 16b or the optical disc 16c of the recording device 16 (S5), expands the read broadcast signal by the reproduction signal processing unit 17, and then outputs the output processing unit 18 and the output terminal 19. To the external monitor device 19a (S6). The control unit 10 determines whether or not the end of the simultaneous recording / reproducing process is instructed by an instruction from the user (S7). When it is determined that the end is not instructed (S7: NO), the control unit 10 proceeds to step S3. Returning to the process, the processes from step S3 to S6 are repeated until the end of the simultaneous recording / reproducing process is instructed. If the control unit 10 determines that an instruction to end the simultaneous recording / reproducing process is given (S7: YES), the process ends.

  On the other hand, when it is determined in step S1 that the monitor device 19a is not connected to the output terminal 19 (S1: NO), the control unit 10 includes each of the recording signal processing unit 15, the recording device 16, and the reproduction signal processing unit 17. The operation is set to the low image quality mode (S8), the broadcast signal from the channel selected by the user is received by the tuner 13 (S9), and converted into a digital broadcast signal by the A / D converter 14. Next, the control unit 10 causes the recording signal processing unit 15 to compress the received broadcast signal at the second compression rate corresponding to the low image quality mode, and then records it on the magnetic medium 16b or the optical disc 16c of the recording device 16 (S10).

  The control unit 10 reads the broadcast signal recorded on the magnetic medium 16b or the optical disc 16c of the recording device 16 (S11), expands the read broadcast signal by the reproduction signal processing unit 17, and then displays the broadcast signal via the scaling unit 20. (S12). The control unit 10 determines whether or not the end of the simultaneous recording / reproducing process is instructed by an instruction from the user (S13). When it is determined that the end is not instructed (S13: NO), the control unit 10 proceeds to step S9. Returning to the process, the processes from step S9 to S12 are repeated until the end of the simultaneous recording / reproducing process is instructed. If the control unit 10 determines that an instruction to end the simultaneous recording / reproducing process is given (S13: YES), the process ends.

  Note that the user can interrupt the broadcast program playback process in the external monitor device 19a or the display device 21 of the recording / playback apparatus 1 during the execution of the simultaneous recording / playback process described above. In this case, the control unit 10 stops reading the broadcast program recorded in the recording device 16 while continuing the recording process of the broadcast signal received from the tuner 13 in the recording device 16. In addition, when the user instructs to resume the reproduction processing of the broadcast program that has been interrupted, the control unit 10 sequentially starts the reproduction processing of the broadcast signal from the point where reading is stopped.

  As described above, in the recording / reproducing apparatus 1 that executes the time shift process, when the broadcast program is reproduced on the display device 21 provided therein, the low image quality mode is selected and the compression process is performed at the high compression rate. Recording the broadcast signal in the recording device 16 causes some degradation in image quality, but can reduce power consumption in the time shift process. When a broadcast program is reproduced on the external monitor device 19a, the image quality is deteriorated by causing the recording device 16 to record a broadcast signal that has been subjected to compression processing at a low compression rate by selecting the high image quality mode. And high-quality video can be displayed on the external monitor device 19a.

(Embodiment 2)
Below, the recording / reproducing apparatus 1 in Embodiment 2 is explained in full detail. FIG. 3 is a block diagram showing a configuration example of the recording / reproducing apparatus 1 according to the second embodiment. Note that the same components as those of the recording / reproducing apparatus 1 of the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 3, the recording / reproducing apparatus 1 of the second embodiment has a configuration that cannot be connected to an external monitor device 19a (see FIG. 1), and an output processing unit 18 as shown in FIG. And the output terminal 19 is not provided. Needless to say, the recording / reproducing apparatus 1 of the first embodiment may be configured to be connected to the external monitor device 19a.

  The recording / reproducing apparatus 1 according to the second embodiment includes a control unit 10, a ROM 11, a RAM 12, a tuner 13, an A / D converter 14, a recording signal processing unit 15, a recording device 16, a reproduction signal processing unit 17, a scaling unit 20, In addition to the display device 21 and the remote control receiving unit 22, a remaining amount detection unit (detection unit) 25 that detects the remaining amount of power of the battery 23 a mounted on the battery mounting unit 23 (hereinafter referred to as remaining capacity) is provided. Are connected to each other via a bus 1a.

  In the recording / reproducing apparatus 1 of the second embodiment, the load resistor R1 and the current detection resistor R2 (R2 << R1) are connected in series between the two electrodes of the battery 23a attached to the battery attachment unit 23. A voltage measuring unit 24 is further connected in parallel to the resistor R2. The voltage measurement unit 24 measures the voltage applied to the resistor R2 by the current flowing through the load resistor R1 by the battery 23a, and notifies the remaining voltage detection unit 25 of the measured voltage value. The remaining amount detection unit 25 calculates the value of the current flowing through the load resistor R1 by dividing the voltage value notified from the voltage measurement unit 24 by the resistance value of the resistor R2. Further, the remaining amount detection unit 25 determines the battery 23a based on the calculated current value, the accumulated usage time of the battery 23a, and the available time for the power capacity (A · h) when the battery 23a is fully charged. Calculate the remaining capacity (%).

  In the recording / reproducing apparatus 1 having the above-described configuration, similarly to the recording / reproducing apparatus 1 in the first embodiment described above, the reception function of the broadcast signal by the tuner 13, the recording function of recording the received broadcast signal in the recording apparatus 16, and reception Display function for displaying the broadcast signal recorded on the broadcast device or the broadcast signal recorded on the recording device 16 on the display device 21, and the time shift for displaying the broadcast signal received by the tuner 13 on the recording device 16 once after being recorded on the recording device 16 Functions (simultaneous recording / playback function).

  The recording / reproducing apparatus 1 according to the second embodiment is driven by the power supplied from the battery 23a attached to the battery attachment unit 23, and the processes being executed are interrupted due to a shortage of power supplied from the battery 23a. In order to prevent this, the user sets a reproduction time (viewing time) in advance when the display device 21 reproduces a broadcast signal received by the tuner 13 or a broadcast signal recorded in the recording device 16. Then, the control unit 10 determines whether or not the electric energy for the set reproduction time remains in the battery 23a, and performs the reproduction processing of the broadcast signal requested by the user when the electric energy remains. Do.

  Here, in the ROM 11 of the recording / reproducing apparatus 1, each process performed by the recording / reproducing apparatus 1 as shown in FIG. 4, specifically, a reproduction process (display) of the broadcast signal received by the tuner 13 on the display device 21. Processing), a power consumption table defining the power consumption corresponding to each of the reproduction processing of the broadcast signal recorded in the recording device 16 on the display device 21 and the recording processing of the broadcast signal received by the tuner 13 on the recording device 16. Is stored in advance. In this power consumption table, for example, when the power capacity at the time of full charge of the battery 23a is set to 100, the power consumption necessary for executing each process for one hour is defined. Specifically, it shows that “10” power is consumed when the process of reproducing the broadcast signal received by the tuner 13 on the display device 21 is performed for one hour.

  Therefore, the control unit (accepting means) 10 displays a broadcast signal received by the tuner 13 or recorded on the recording device 16 when the user operates a predetermined key of the remote control device or a predetermined key of the operation unit. When the execution instruction (display instruction) and display time of the reproduction process (display process) in the device 21 are received, the power consumption necessary for the reproduction process corresponding to the received execution instruction is calculated (detected) based on the power consumption table. The remaining amount of the battery 23a is detected by the remaining amount detection unit 25. Here, the remaining capacity of the battery 23a detected by the remaining amount detection unit 25 is larger than the power consumption necessary for the reproduction process calculated from the power consumption table, and the power necessary for the execution of the reproduction process instructed to be executed is larger than the battery 23a. If it remains, the playback process is executed and the corresponding video is displayed on the display device 21.

  Further, the control unit 10 secures the power consumption necessary for the reproduction process calculated from the power consumption table from the remaining capacity of the battery 23a detected by the remaining amount detection unit 25, and then performs the reproduction instructed as described above. It operates as a determination means for determining whether or not processing other than processing is possible. Specifically, when the reproduction process instructed to be executed is executed as described above, the control unit 10 uses the remaining capacity of the battery 23a detected by the remaining amount detection unit 25 to consume necessary for the reproduction process being executed. It operates as a subtracting means for subtracting electric power, and determines a process that can be executed based on the calculated remaining capacity of the battery 23a.

  For example, when the broadcast signal received by the tuner 13 is viewed on the display device 21, the user instructs the execution of the time shift function of recording the broadcast signal once in the recording device 16 and reproducing it on the display device 21. can do. In this case, the control unit 10 instructs the recording device 16 to execute the recording process of the broadcast signal received by the tuner 13 when the user operates a predetermined key of the remote control device or a predetermined key of the operation unit (recording instruction). And recording time.

  Further, the control unit 10 calculates the power consumption necessary for the recording process corresponding to the received execution instruction based on the power consumption table, and the calculated power consumption of the battery 23a obtained by subtraction as described above. If it is less than the remaining capacity, it is determined that the recording process that accepted the execution instruction can be executed, and the recording process is executed. Here, when the remaining capacity of the battery 23a is less than the power consumption necessary for the recording process corresponding to the received execution instruction and the execution of the recording process is not possible, the control unit (notification unit) 10 determines that the battery 23a A message indicating that the recording process cannot be executed due to a lack of remaining capacity is displayed on the display device 21 to notify the user.

  As a result, the recording / reproducing apparatus 1 runs out of the remaining capacity of the battery 23a by executing the recording process to the recording apparatus 16 during the execution of the reproduction process instructed by the user, and along with the reproduction process of the broadcast program, A situation in which the recording process cannot be executed can be avoided. For example, when simultaneous recording / playback processing by the time shift function is being performed, the recording process of the broadcast signal received by the tuner 13 in the recording device 16 is interrupted, and the broadcast signal received by the tuner 13 is recorded in the recording device 16. By displaying on the display device 21 without recording, it is possible to avoid a situation where both the recording process and the reproducing process performed simultaneously are interrupted.

  Hereinafter, in the recording / reproducing apparatus 1 having the above-described configuration, a reproduction process in which the display device 21 outputs a broadcast signal received by the tuner 13 or a broadcast signal recorded in the recording device 16 according to an instruction from the user will be described. FIG. 5 is a flowchart showing a playback processing procedure by the recording / playback apparatus 1 according to the second embodiment.

  In the recording / reproducing apparatus 1, when the user operates a predetermined key of the remote control device or a predetermined key of the operation unit, the reproduction processing of the broadcast program broadcast on a desired channel on the display device 21, the magnetic medium 16b or the optical disk When execution of the reproduction process of the broadcast program recorded in 16c on the display device 21 is instructed, the control unit 10 executes the reproduction process instructed to execute (S21).

  Next, when the user operates a predetermined key of the remote control device or a predetermined key of the operation unit, the control unit 10 instructs execution of a recording process to the recording device 16 of a broadcast program broadcast on a desired channel. If it is determined whether or not the recording process has been instructed (S22: NO), the reproduction process is continued (S21). When determining that the execution of the recording process is instructed (S22: YES), the control unit 10 detects the power consumption necessary for the reproduction process executed in step S21 based on the power consumption table shown in FIG. 4 (S23). ) The remaining capacity of the battery 23a is detected by the remaining amount detection unit 25 (S24).

  The control unit 10 detects the power consumption required for the recording process instructed to be executed by the user based on the power consumption table (S25), and the consumption detected in step S23 from the remaining capacity of the battery 23a detected in step S24. Based on whether the remaining capacity obtained by subtracting the power is larger than the power consumption necessary for the recording process detected in step S25, it is determined whether or not the recording process instructed to be executed can be executed (S26). ).

  When it is determined that the recording process can be executed (S26: YES), the control unit 10 executes the recording process (S27), and when it is determined that the recording process cannot be executed (S26: NO), the battery A message indicating that the recording process cannot be executed because the remaining capacity of 23a is insufficient is displayed and notified on the display device 21 (S28), and the process ends. In addition, when the control unit 10 determines that the recording process cannot be executed because the remaining capacity of the battery 23a is insufficient, the control unit 10 stops receiving the recording process execution instruction from the user thereafter. Unnecessary power consumption can be prevented.

  In the second embodiment described above, when the recording / reproducing apparatus 1 is requested to execute the recording process during the reproduction process and the requested recording process cannot be executed due to a shortage of the remaining capacity of the battery 23a, this is indicated. By displaying a message to be displayed on the display device 21, the user who is viewing the display device 21 is notified, but a dedicated notification LED is provided and the notification LED is turned on to notify the user. In addition, a warning sound for notification can be output from a sound output unit (not shown).

  As described above, the recording / reproducing apparatus 1 can surely secure the power necessary for the requested reproduction process when the reproduction process is requested, and can secure the power necessary for the reproduction process being performed. In addition, when the power required for the recording process requested to be executed remains in the battery 23a, the requested recording process is also executed, so that the remaining capacity of the battery 23a is insufficient. It is possible to avoid a situation where both the reproduction process and the recording process are interrupted. In addition, the playback process can be executed with priority by securing the power required for the playback process in preference to the power required for the recording process.

(Embodiment 3)
Below, the recording / reproducing apparatus 1 in Embodiment 3 is explained in full detail. FIG. 6 is a block diagram showing a configuration example of the recording / reproducing apparatus 1 according to the third embodiment. In addition, about the structure similar to the recording / reproducing apparatus 1 of Embodiment 2 mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the recording / reproducing apparatus 1 according to the third embodiment, a load resistor R1 and a voltage detection resistor R3 (R1 << R3) are connected in parallel between both electrodes of the battery 23a attached to the battery attachment unit 23. Further, a voltage measuring unit 24 is connected in parallel to the resistor R3. The voltage measurement unit 24 measures the voltage applied to the resistor R3 by the current that is shunted from the load resistor R1 by the battery 23a and flows through the resistor R3, and notifies the remaining voltage detection unit 25 of the measured voltage value. The remaining amount detection unit 25 can directly detect the voltage value of the battery 23 a based on the voltage value notified from the voltage measurement unit 24. The remaining amount detection unit 25 calculates the remaining capacity (%) of the battery 23a by monitoring that the detected voltage value of the battery 23a gradually decreases after the battery 23a has been used for a predetermined time.

  The recording / reproducing apparatus 1 according to the third embodiment is configured so that a recording instruction (reservation) of a reservation recording process to the recording apparatus 16 of a broadcast signal received by the tuner 13 can be performed, and a reservation recording process reserved by a user. Is stored in the RAM 12. The reservation information includes a recording medium (magnetic medium 16b or optical disk 16c) as a recording destination, a broadcast channel of a broadcast program, a recording start time, a recording end time, and the like. Thereby, the control part 10 starts the recording process of the broadcast signal according to the set broadcast channel when the recording start time in the reservation recording process indicated by the reservation information stored in the RAM 12 has passed, and the recording end time When elapses, the recording process is terminated.

  Therefore, the control unit (accepting means) 10 reserves a broadcast signal recording process corresponding to a desired broadcast channel received by the tuner 13 when the user operates a predetermined key of the remote control device or a predetermined key of the operation unit. When an instruction (recording instruction) and a recording time are received, the remaining amount detection unit 25 operates as a calculation unit that calculates power consumption required for the reservation recording process corresponding to the received reservation instruction based on the power consumption table. The remaining capacity of the battery 23a is detected. Here, the remaining capacity of the battery 23a detected by the remaining amount detection unit 25 is larger than the power consumption required for the reservation recording process calculated from the power consumption table, and the power required for executing the reservation-instructed recording process is higher. If it remains in 23a, reservation information indicating reservation recording processing is stored in the RAM 12.

  Further, the control unit 10 secures the power consumption necessary for the reservation recording process calculated from the power consumption table from the remaining capacity of the battery 23 a detected by the remaining amount detection unit 25, for example, broadcast on the display device 21. It operates as a determination means for determining whether or not the program reproduction process can be executed. Specifically, when the recording unit reserves the recording process as described above, the remaining capacity of the battery 23a detected by the remaining amount detecting unit 25 is greater than the power consumption required for the reserved recording process. It is determined whether or not there is a large amount, and it is determined that the broadcast program can be played back on the display device 21 until the remaining capacity of the battery 23a becomes less than the power consumption of the reserved recording process.

  For example, the user can instruct viewing of the broadcast signal received by the tuner 13 on the display device 21 after making a reservation for the recording process as described above. In this case, the control unit 10 accepts a display instruction for causing the display device 21 to display the broadcast signal received by the tuner 13 when the user operates a predetermined key of the remote control device or a predetermined key of the operation unit.

  When the control unit 10 receives a display instruction on the display device 21, the control unit 10 starts displaying the broadcast program corresponding to the requested broadcast channel on the display device 21, and supplies the battery to the remaining amount detection unit 25 at predetermined time intervals. The remaining capacity of 23a is detected. Further, the control unit 10 determines whether the remaining capacity of the battery 23a detected at a predetermined time interval is greater than the power consumption necessary for the reserved recording process as described above. It is determined whether the display process can be continued. Here, when the remaining capacity of the battery 23a becomes less than the power consumption necessary for the reserved recording process, the control unit 10 operates as a display control means for ending the broadcast program reproduction process on the display device 21. When the reproduction process is ended, the display unit 21 displays a message indicating that the reproduction process in the display device 21 is ended due to a shortage of the remaining capacity of the battery 23a, and operates as a notification unit that notifies the user.

  As a result, the recording / reproducing apparatus 1 further executes the display process of the broadcast program on the display device 21 while waiting for the execution of the recording process reserved by the user, so that the remaining capacity of the battery 23a becomes insufficient, and A situation in which a reserved recording process cannot be executed together with the display process can be avoided.

  Hereinafter, reservation processing (reservation recording processing) of recording processing to the recording device 16 of the broadcast signal received by the tuner 13 in accordance with an instruction from the user in the recording / reproducing apparatus 1 having the above-described configuration will be described. FIG. 7 is a flowchart showing a reservation recording processing procedure by the recording / reproducing apparatus 1 according to the third embodiment.

  In the recording / reproducing apparatus 1, when the user operates a predetermined key of the remote control device or a predetermined key of the operation unit, execution of a reservation recording process to the recording apparatus 16 of a broadcast program broadcast on a desired channel is instructed. If so, the control unit 10 stores reservation information indicating the reservation recording process instructed to be executed in the RAM 12 (S31).

  Next, the control unit 10 performs display processing (reproduction processing) on the display device 21 of a broadcast program broadcast on a desired channel when the user operates a predetermined key of the remote control device or a predetermined key of the operation unit. Is determined (S32). When it is determined that the execution of the reproduction process is not instructed (S32: NO), the process waits until the execution of the reproduction process is instructed. When it is determined that the execution of the reproduction process has been instructed (S32: YES), the control unit 10 executes the reproduction process instructed to execute (S33), and starts the timing process with its own timer (S34).

  The control unit 10 detects the power consumption necessary for the recording process reserved in step S31 based on the power consumption table shown in FIG. 4 (S35), and the remaining amount detection unit 25 detects the remaining capacity of the battery 23a ( S36). Based on whether or not the remaining capacity of the battery 23a detected in step S36 is greater than the power consumption required for the reservation recording process detected in step S35, the control unit 10 performs the display in the display device 21 instructed to execute. It is determined whether or not the reproduction process can be executed (S37).

  When determining that the reproduction process can be executed (S37: YES), the control unit 10 determines whether or not a predetermined time has elapsed based on the time counted by its own timer (S38). When it is determined that the predetermined time has not elapsed (S38: NO), the process waits until the predetermined time has elapsed, and when it is determined that the predetermined time has elapsed (S38: YES), the timer process is started again ( S39), the process returns to step S36.

  If the control unit 10 determines in step S37 that the reproduction process cannot be executed (S37: NO), the reproduction process in the display device 21 is terminated (S40), and the remaining capacity of the battery 23a is insufficient. As a result, a message indicating that the reproduction processing on the display device 21 is completed is displayed on the display device 21 and notified (S41), and the processing is terminated.

  As described above, when the user requests execution of the reservation recording process, the recording / reproducing apparatus 1 can reliably secure the power required for the requested reservation recording process, and is necessary for the reserved recording process. If the remaining capacity of the battery 23a remains in addition to ensuring sufficient power, the requested display device 21 also performs a reproduction process, so that the remaining capacity of the battery 23a is insufficient, thereby waiting for reservation. It is possible to avoid the situation where both the recording process and the reproduction process on the display device 21 are interrupted. In addition, by preferentially securing the power required for the reservation recording process over the power required for the reproduction process, the reserved recording process can be executed with priority.

  Note that the same modification example as that described in the second embodiment can be applied to the recording / reproducing apparatus 1 in the third embodiment.

  As described above, the recording / reproducing apparatus 1 according to the first embodiment performs the compression process and the expansion process performed by the recording signal processing unit 15 and the reproduction signal processing unit 17 depending on whether or not the external monitoring device 19a is connected. The compression rate is configured to be changed between when the image quality is important and when the power consumption is important. Further, the recording / reproducing apparatus 1 according to the second embodiment performs a reproduction process of a broadcast signal received by the tuner 13 or a broadcast signal recorded in the recording apparatus 16 when the battery 23a does not have a sufficient remaining capacity. Is performed preferentially over recording processing of the broadcast signal received by the recording device 16.

  Furthermore, the recording / reproducing apparatus 1 according to the third embodiment performs a process of recording a broadcast signal received by the tuner 13 on the recording apparatus 16 when the battery 23a does not have a sufficient remaining capacity. The broadcast signal recorded on the recording device 16 is preferentially performed over the reproduction process. Each recording / reproducing apparatus 1 as described above is integrally configured, and when the battery 23a does not have a sufficient remaining capacity by switching to the setting condition by the user, the reproduction process is preferentially performed or the recording process is preferentially performed. It can also be configured to be able to switch between the two.

1 is a block diagram illustrating a configuration example of a recording / reproducing device according to Embodiment 1. FIG. 6 is a flowchart showing a simultaneous recording / reproduction processing procedure by the recording / reproducing apparatus according to Embodiment 1; 6 is a block diagram illustrating a configuration example of a recording / reproducing device according to Embodiment 2. FIG. It is a schematic diagram which shows the structural example of a power consumption table. 10 is a flowchart showing a playback processing procedure by the recording / playback apparatus according to the second embodiment. FIG. 10 is a block diagram illustrating a configuration example of a recording / reproducing device according to a third embodiment. 10 is a flowchart showing a reservation recording processing procedure by the recording / reproducing apparatus according to the third embodiment.

Explanation of symbols

1 Recording / playback device (video display device)
10 Control part (detection means, display control means, reception means, calculation means, determination means, subtraction means, notification means)
15 Recording signal processor (first compression means, second compression means)
16 Recording device 16b Magnetic medium (recording unit)
16c Optical disc (recording part)
17 Reproduction signal processor (first decoding means, second decoding means)
18 Output processing section (sending means)
19 Output terminal (connection part)
21 Display device (display unit)
23 battery mounting part 23a battery 25 remaining amount detection part (detection means)

Claims (10)

In a video display device comprising: a battery mounting unit to which a battery is mounted; a connection unit to which an external display device is connected; a recording unit that records video acquired from the outside; and a display unit that displays video.
Detecting means for detecting connection of an external display device to the connection unit;
When power is supplied from a battery attached to the battery attachment unit, when the detection unit detects the connection, an image acquired from the outside is compressed at a first compression rate and recorded in the recording unit First compression means;
First decoding means for reading and decoding the video compressed by the first compression means and sequentially recorded in the recording unit;
Sending means for sending the video decoded by the first decoding means from the connection unit;
When power is supplied from a battery attached to the battery attachment portion, and the detection means does not detect the connection, an image acquired from the outside is compressed at a second compression rate higher than the first compression rate. A second compression means for recording in the recording unit;
Second decoding means for reading and decoding the video compressed by the second compression means and sequentially recorded in the recording unit;
Display control means for displaying the video decoded by the second decoding means on the display unit. In a video display device comprising a battery mounting unit to which a battery is mounted, a recording unit for recording video acquired from the outside, and a display unit for displaying video,
Receiving means for receiving a display instruction and a display time for causing the display unit to display a video acquired from the outside or a video recorded in the recording unit;
Detecting means for detecting a remaining capacity of the battery mounted in the battery mounting portion when the receiving means receives the display instruction;
Calculating means for calculating power consumption for the display time on the display unit when the receiving means receives the display instruction;
And a judging means for judging whether or not processing other than display on the display unit can be performed based on the power consumption calculated by the calculating means and the remaining capacity detected by the detecting means. Display device. The accepting unit is configured to accept a recording instruction and a recording time of a video recording process by the recording unit,
The calculating means is configured to calculate power consumption for the recording process when the receiving means receives the recording instruction,
Subtracting means for subtracting power consumption for the display time on the display unit calculated by the calculating means from the remaining capacity detected by the detecting means when the receiving means accepts a recording instruction,
The determination means is configured to determine whether or not the recording process is possible based on the remaining capacity calculated by the subtraction means and the power consumption for the recording process calculated by the calculation means. The video display device according to claim 2.   The video display device according to claim 3, further comprising a notifying unit that notifies that when the determining unit determines that the recording process is not possible.   5. The video display device according to claim 3, further comprising: a unit that stops receiving a recording instruction by the receiving unit after that time when the recording unit determines that the recording process is not possible. 6. . In a video display device comprising a battery mounting unit to which a battery is mounted, a recording unit for recording video acquired from the outside, and a display unit for displaying video,
Accepting means for accepting a recording instruction and a recording time of a reservation recording process of video by the recording unit;
Detecting means for detecting a remaining capacity of the battery mounted in the battery mounting portion when the receiving means receives the recording instruction;
Calculating means for calculating power consumption for the reservation recording process when the accepting means accepts the recording instruction;
A video display, comprising: a determination unit configured to determine whether video can be displayed on the display unit based on the power consumption calculated by the calculation unit and the remaining capacity detected by the detection unit. apparatus. The accepting unit is configured to accept a display instruction for causing the display unit to display a video acquired from the outside or a video recorded in the recording unit,
When the receiving unit receives a display instruction, the display unit includes a display control unit that displays the display-instructed video on the display unit,
The detection means is configured to detect a remaining capacity of a battery mounted on the battery mounting unit at predetermined time intervals during display of an image on the display unit.
The determination unit determines whether the remaining capacity detected at the predetermined time interval by the detection unit is greater than the power consumption for the reservation recording process calculated by the calculation unit. The video display device according to claim 6, wherein it is configured to determine whether or not display is possible.   8. The display control unit according to claim 7, wherein the display control unit is configured to stop display on the display unit when the determination unit determines that display on the display unit is not possible. Video display device.   The video display device according to claim 8, further comprising a notifying unit that notifies that when the display control unit stops the display on the display unit.   The apparatus according to any one of claims 7 to 9, further comprising means for stopping reception of a display instruction by the reception means after that time when the determination means determines that display on the display unit is not possible. The video display device according to one.

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