JP4305106B2 - Portable HDD video playback device - Google Patents

Description

  The present invention relates to a portable HDD moving image playback apparatus that stores and plays back a moving image stream in an HDD.

  In recent years, there are various categories of electronic devices equipped with panel type displays such as LCD (Liquid Crystal Display). In this type of electronic equipment, hand-held type equipment with particular emphasis on portability is a heat source such as a panel display or a printed circuit board, but the overall heat generation does not become so high at peak times. In general, it was not enough to take such heat countermeasures.

However, functions and applications required for handheld devices are diversifying, and it is expected that specific heat countermeasures will be indispensable due to the mounting of devices with a large amount of heat generation. As general heat countermeasures for electronic devices, air cooling by a cooling fan, heat release by a heat sink, and the like are known.
JP 2000-20172 A

  The present inventor currently has a built-in hard disk drive (hereinafter referred to as “HDD”) for storing a video stream, and hardware decodes the MPEG (Moving Picture Coding Experts Group) 2 video stream stored in the HDD. The portable HDD video playback device that can be played back and displayed on the LCD is under development. In this way, not only LCDs but also devices equipped with HDDs, hardware MPEG2 decoders, and the like have a considerably large heat generation as a whole, and countermeasures against such heat have been required. In particular, when watching a moving image reproduction, the user often keeps the device by hand for a long time. For this reason, more effective measures against the heat problem have been demanded.

  The present invention has been made to solve the above-described problems, and provides a portable HDD video playback device capable of reducing the heat problem of a portion of the housing where the user can drop. It is aimed.

  In order to achieve such an object, a portable HDD video playback device according to the present invention includes a hard disk drive that stores a video stream, and a substrate on which electronic components for reading and playing the video stream from the hard disk drive are mounted, In the direction of the height of the screen of the display unit, a panel-shaped display unit that displays the video reproduced by the video reproduction unit, a housing that integrally accommodates the hard disk drive, the substrate, and the display unit An exhaust hole provided at a position higher than the screen of the housing and a fan provided in the vicinity of the exhaust hole are provided.

  In the portable HDD video playback device of the present invention, an exhaust hole is provided at a position higher than the screen of the casing in the height direction of the screen of the display unit, and the heat in the casing is released from the exhaust hole by a fan. As a result, heat from a heat source such as a hard disk drive, a substrate, and a display unit in the housing can be efficiently released to the outside, and heating of the housing can be reduced. Therefore, even if the user continues to hold the portable HDD moving image playback device for a long time, the user is less likely to feel discomfort due to heat.

  Also, the portable HDD video playback device of the present invention has a battery unit for power supply, and this battery unit is arranged at a position lower than the screen of the casing in the height direction of the screen of the display unit. You can also By arranging the heavy battery unit at a low position, the sense of stability when the user holds the portable HDD moving image playback device by hand is improved.

  Furthermore, the portable HDD moving image playback apparatus of the present invention has a configuration in which the display unit, the substrate, and the hard disk drive are arranged in this order in the direction orthogonal to the screen of the display unit. In other words, by arranging the heat generation amount farther away from the surface opposite to the display surface of the housing that the user's hand can easily touch, the thermal problem of the part where the user's hand can be dropped is effectively reduced. be able to.

  Furthermore, the portable HDD moving image playback device of the present invention has a configuration in which a temperature detection unit that detects temperature and a control unit that controls the rotation speed of the fan based on the detection result of the temperature detection unit are provided. Thereby, the optimal cooling capacity according to the emitted-heat amount is obtained.

  In addition, when a circuit for performing hardware decoding of a moving image stream is mounted on the substrate, the overall heat generation amount is further increased, so that the usefulness of the portable HDD moving image reproducing device of the present invention is further increased.

  According to the portable HDD moving image reproducing apparatus of the present invention, it is possible to reduce the heat problem of the portion of the housing where the user can drop.

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

  FIG. 1 is a perspective view showing the appearance of a portable HDD movie player according to an embodiment of the present invention, FIG. 2 is a plan view showing the portable HDD movie player 100 from the front, and FIG. Similarly, FIG. 4 is a plan view of the portable HDD moving image reproducing apparatus as seen from above.

  This portable HDD video playback device 100 has a housing 1 that is sized to be held with one hand. On the front side of the housing 1, an LCD screen portion 2, a key operation portion 3, operation buttons 4, and an LED (Light Emitting Diode) display portion 5 for displaying various states are provided.

  As shown in FIG. 2, the key operation unit 3 includes three keys 31, 32, and 33 that are arranged concentrically with each other and can be individually operated. The key at the center is an ENTER key 31 for designating selection / execution. The keys outside the ENTER key 31 are menu selection-related keys 32 that are used when a menu is selected. Further, the outer keys are reproduction-related keys 33 used at the time of reproduction.

  Each of the menu selection related key 32 and the reproduction related key 33 is configured such that a corresponding key command is generated by pressing each of the upper, lower, left and right positions around the ENTER key 31. The key command generated by the menu selection related key 32 is, for example, shifting the focus position up / down / left / right to select an item on various menu screens to be described later. Key commands generated by the playback-related key 33 are fast-forwarding, rewinding, and increasing / decreasing the audio volume.

  The operation buttons 4 include a SETUP button 41 for calling up various setting screens, a DISPLAY button 42 for displaying the elapsed (remaining) playback time of the video stream, and a playback button for instructing playback start and pause 43, and a stop button 44 for instructing to stop the reproduction.

  The LED display unit 5 includes a power-on display unit 51 that displays a power-on state, a charge display unit 52 that displays that the battery is being charged, and a busy display unit 53 that displays a busy state such as during stream transfer.

  On one side surface of the housing 1, a DCIN jack 6 for connecting a DC power source, a USB connector 7 for connecting a USB (Universal Serial Bus), and an AVOUT jack 8 for AV output are provided in this order from the top. . A strap attaching portion 9 is also provided. A PWR key (not shown) for ON / OFF operation of the main power source is provided on the other side surface portion of the housing 1. As shown in FIG. 4, a headphone jack 10 and a number of slit-shaped exhaust holes 11 are provided side by side on the upper surface of the housing 1. A number of slit-shaped intake holes 12 are arranged in the lower portion of the housing 1.

  FIG. 5 is a view showing only the housing 1 in the cross-sectional view of FIG. 3. As shown in the figure, the casing 1 is composed of a casing part 1A on the front side, an intermediate casing part 1B, and a casing part 1C on the back side. The front-side casing component 1A and the rear-side casing component 1C are casing components that mainly form the front and the back of the outer shape of the portable HDD moving image playback device 100, respectively. The intermediate housing part 1B has a portion that becomes the upper side surface and the left and right side surfaces of the outer shape of the portable HDD video playback device 100, and the portion that becomes the upper side surface of the housing 1 is as shown in FIG. The exhaust hole 11 is provided in the above. The front housing part 1A and the rear housing part 1C are joined to each other with the intermediate housing part 1B interposed therebetween. A semicircular cross-sectional shape portion 15 is formed in the lower portion of the housing 1, and the front-side housing component 1 </ b> A and the rear-side housing component 1 </ b> C are directly butted to each other. Yes. Further, the intake hole 12 is provided on the housing part 1 </ b> A side on the front side of the semicircular cross-section 15. The lower part of the intermediate casing part 1B is bent into a U-shaped cross section following the semicircular cross-sectional shape part 15 at the lower part of the casing 1. This portion is referred to as a bent portion 14 of the intermediate casing component 1B.

  A transparent acrylic cover 35 that can cover the LCD screen portion 2 and the operation buttons 4 can be attached to and detached from the front side of the housing 1, and the acrylic cover 35 allows the LCD screen portion 2 to be removed. It protects against scratches and dust. The acrylic cover 35 is provided with an opening 36 for exposing a portion of the key operation unit 3, and the key operation unit 3 can be operated with the acrylic cover 35 attached.

  Next, the internal structure of the portable HDD video playback device 100 will be described.

  As shown in FIG. 3, the components in the housing 1 are divided into a component group housed in an upper position and a component group housed in a lower position in the height direction of the portable HDD video playback device 100. It is divided in arrangement. The component group housed in the upper position includes the LCD 21 with backlight, the main board 22, the HDD board 23, the HDD 24, the cooling fan 25, and the like, and the component group housed in the lower position includes the composite inverter board. 26, battery pack 27, and the like. The LCD 21, the main board 22, and the HDD 24 housed in the upper position are main heat sources in the portable HDD moving image playback apparatus 100. When comparing the heat generation amounts, the order of LCD 21> main board 22> HDD 24 is given. It is common to become.

  In the portable HDD moving image playback apparatus 100, these main heat generation components are arranged in order from the one with the highest heat generation from the front side to the back side. By selecting such an arrangement, the heating of the casing component 1C on the back side can be suppressed to the lowest level compared to other arrangement orders. This portable HDD video playback device 100 is designed so that a user can enjoy watching a video by holding it in his / her hand. At the time of appreciation, the user's hand contacts the housing part 1C on the back side on the widest surface. Thus, the degree of temperature discomfort due to heat can be reduced by minimizing the temperature rise of the housing component 1C on the back side.

  Further, the heat in the housing 1 is generated from an intake hole 12 provided in a lower portion of the housing 1 which is generated by a cooling fan 25 disposed at the uppermost portion in the housing 1. The air is discharged to the outside by an air flow through the exhaust hole 11. Thereby, since the heat generating source in the housing 1 is efficiently air-cooled, the heat problem for the user is further reduced.

  A battery pack 27 for power supply is disposed inside the U-shaped bent portion 14 of the intermediate casing component 1B so as to be surrounded by the bent portion 14. Further, a composite inverter board 26 is supported on the front side (screen side) of the flat surface on the tip side of the bent portion 14. That is, the battery pack 27 and the composite inverter board 26 are separated by the bent portion 14 of the intermediate casing component 1B. Here, the composite inverter board 26 is a board on which components related to the operation of the operation buttons 4 and the key operation unit 3 and an inverter for driving the backlight of the LCD 21 are mounted. As described above, since the battery pack 27 and the composite inverter board 26 are separated by the bent portion 14 of the intermediate casing component 1B, the influence on the composite inverter board 26 due to the liquid leakage from the battery pack 27 can be avoided. In addition, it is possible to protect the battery pack 27 by avoiding that the pressure when the key operation unit 3 is operated is directly applied to the battery pack 27.

  Since the battery pack 27 does not serve as a large heat source, there is no problem even if the battery pack 27 is disposed near the lower back where the user's hand most frequently touches. Further, since the battery pack 27 has the highest specific gravity among the components in the housing 1 and the weight is large, the battery pack 27 is arranged at the bottom of the housing 1 so that the user can hold the portable HDD video playback device 100 during viewing. The feeling of stability when held with is improved.

  In the portable HDD video playback device 100 of this embodiment, as shown in FIG. 3, the air intake hole 12 is provided in the lower part of the housing 1, but as shown in FIG. The intake hole 12 may be provided at a position immediately above the battery pack 27.

  FIG. 13 is a plan view showing the internal structure of the portable HDD moving image reproducing apparatus 100 for each layer. The backlight of the LCD 21 is connected to the connector 132 fixed to the screen side surface of the composite inverter board 26 through the connection wiring 131, and signals necessary for lighting and control are transmitted from the composite inverter board 26 to the backlight of the LCD 21 through the connection wiring 131. Supplied. The LCD 21 is connected to a connector 134 fixed to the opposite side of the screen of the main board 22 through the connection wiring 133, and necessary signals are supplied from the main board 22 to the LCD 21 through the connection wiring 133. The main board 22 and the composite inverter board 26 are electrically connected through connectors 135 and 136 fixed to the side surfaces of the respective screens and connection wires 137 connected between the connectors 135 and 136, so that necessary signals can be communicated with each other. Do. Further, two connectors 140 and 141 to which one ends of connection wirings 138 and 139 for supplying drive signals to the two cooling fans 25 and 25 are respectively connected are provided on the screen side surface of the main board 22. The main board 22 and the HDD board 23 communicate with each other by a connection wiring 144 that connects between a connector 142 provided on the opposite side of the screen of the main board 22 and a connector 143 provided on the side of the screen of the HDD board 23. It can be done. The main board 22 is provided with a DC (direct current) IN jack 6, a USB connector 7, an AVOUT jack 8 for AV output, and a headphone jack 10. The HDD board 23 is provided with a switch 145 for resetting the system. The connection wiring 146 drawn out from the battery pack 27 is connected to a connector 147 provided on the side surface of the main board 22. The HDD 24 is electrically connected to the HDD substrate 23 through a connector 148 provided on the opposite side of the screen of the HDD substrate 23.

  Next, the electrical configuration of the portable HDD moving image playback apparatus 100 will be described with reference to FIG. The figure mainly shows the configuration of a circuit mounted on the main board 22.

  In the figure, the system controller 61 includes various operation keys 3 and 4, operation of the PWR key 62, connection of AC (alternating current) power (AC detection) 63, output of the reset IC 64, voltage of the battery 65, The temperature sensor 66 and the like are monitored, and processing corresponding to the monitoring result is executed. The reset IC 64 is an IC that generates a reset operation signal when the reset SW 67 is operated.

  When the system controller 61 detects that the PWR key 62 has been pressed, the system controller 61 performs system startup processing and initializes each device to an operable state. Further, control is performed so that the power-on display unit 51 is lit. When it is detected that the PWR key 62 has been pressed while the system is operating, a system termination process is performed.

  When the system controller 61 receives a reset operation signal from the reset IC 64, the system controller 61 performs a startup process following a reset process, that is, an end process.

  When the system controller 61 detects connection of AC power (AC detection) 63, the system controller 61 controls the power circuit 68 and controls charging of the battery 65. The power supply circuit 68 is automatically turned off when, for example, a high temperature equal to or higher than a set temperature is detected based on the output of a temperature sensor 69 disposed in the vicinity thereof.

  The system controller 61 calculates the remaining amount of the battery 65 based on the monitoring result of the battery voltage and controls the battery remaining amount display on the screen.

  The system controller 61 controls the rotation speed of the cooling fan 25 based on the output of the temperature sensor 66. That is, control is performed to increase the cooling capacity in proportion to the temperature.

  Further, the system controller 61 monitors key operations of the key operation unit 3 and the operation buttons 4 and performs event processing according to the type of the operated key.

  The system controller 61 includes a CPU (Central Processing Unit) 71, a RAM (Random Access Memory) 72, a ROM (Read Only Memory) 73, an A / D conversion circuit 74, a serial PWM (Pulse Width Modulation) control control circuit 75, and the like. These are connected through a bus 76. The CPU 71 executes various arithmetic processes and controls using the RAM 72 as a work area by firmware stored in the ROM 73. The A / D conversion circuit 74 operates the above-described various keys 3 and 4, operation of the PWR key 62, connection of AC power (AC detection) 63, output of the reset IC 64, voltage of the battery 65, temperature sensor 66 This is a part that converts an analog value, which is a monitoring result, into a digital value. The serial PWM control circuit 75 supplies a mute control for the headphone 81 and a PWM signal for controlling the luminance of the backlight 82 of the LCD 21 to the inverter 83.

  The USB bridge 86, HDD 24, and DMA (Direct Memory Access) transfer circuit 87 to which the USB terminal 85 is connected are connected to each other through an IDE (Integrated Drive Electronics) bus 88 and transferred from a PC connected to the USB terminal 85. Data such as a moving image stream is recorded on the HDD 24 from the USB bridge 86 through the IDE bus 88.

  The DMA transfer circuit 87 is a circuit that transfers data read from the HDD 24 to the MPEG2 decoder 89. The DMA transfer circuit 87 has four selectors 90, 91, 92, 93 and a DMA controller 94. The first selector 90 is a selector for selecting data on the IDE bus 88, and connects the DMA transfer circuit 87 to the IDE bus 88 based on an ATA (AT Attachment) command for the system controller 61 to access the HDD 24. Put it in a state. The first selector 90 is connected to the second selector 91 connected to the buffer memory 95 by the first DMA transmission path 96. Therefore, the data extracted from the IDE bus 88 by the first selector 90 is transferred to the buffer memory 95 through the first DMA transmission path 96 and the second selector 91.

  In the data transfer from the HDD 24 to the buffer memory 95, the system controller 61 controls the issuance timing of the ATA command output to the first selector 90 so that the data reading from the HDD 24 is performed intermittently. . Specifically, for example, data is read from the HDD 24 in units of a moving picture stream for a predetermined reproduction time and transferred to the buffer memory 95. When the data in the buffer memory 95 becomes empty, the next reproduction time is read from the HDD 24. An ATA command is issued from the system controller 61 to the first selector 90 so as to read the moving picture stream. As a result, access to the HDD 24 is intermittently performed, and the amount of heat generated by the HDD 24 and power consumption can be reduced.

  Data such as a moving image stored in the buffer memory 95 is read out by the second selector 91 when a moving image stream for a predetermined reproduction time is stored in the buffer memory 95, and the second selector 91 and the MPEG2 decoder 89 Are transferred to the MPEG2 decoder 89 through the second DMA transmission path 97 connecting the two. The MPEG2 decoder 89 is a circuit that decodes a moving picture stream encoded by MPEG2 by hardware. The SDRAM 98 is a randomly accessible memory used as a work area of the MPEG2 decoder 89.

  Of the output of the MPEG2 decoder 89, the moving image data is sent to the LCD controller 99, and the driving of the LCD 21 is controlled by the LCD controller 99 to reproduce the moving image. On the other hand, the audio data output from the MPEG2 decoder 89 is converted into an analog signal by the D / A converter 101 and then sent to the headphones connected to the headphone terminal 10. Also, an external television or the like can be connected to the AVOUT terminal 102. When an external television is connected to the AVOUT terminal 102, the analog signal of the D / A converter 101 is output from the linear amplifier 103. It is amplified to the required level.

  The third selector 92 of the DMA transfer circuit 87 performs communication between the system controller 61 and the bus 105 to which the flash ROM 104 is connected. The third selector 92 extracts the ATA command generated from the system controller 61 from the bus 105 and notifies the first selector 90 through the control line 106.

  The HDD 24 stores, as read-only data, data such as bitmaps and character codes, which are components such as a title list, menu, and setting screen. When the system controller 61 reads out this bitmap and character code from the HDD 24, it notifies the DMA controller 94 through the third selector 92. Upon receiving this notification, the DMA controller 94 enables the DMA transmission path 96 between the third selector 92 and the second selector 91 and controls the fourth selector 93 to control the second selector 91 and The third DMA transmission path 107 connecting the MPEG2 decoder 89 is made valid.

  The character code read from the HDD 24 and held in the buffer memory 95 together with the bit map is sent to the system controller 61 through the second selector 91, the third selector 92, and the bus 105. The system controller 61 reads bitmap data corresponding to this character code from the flash ROM 104 and returns it to the third selector 92. The DMA controller 94 sends bitmap data corresponding to the character code returned from the system controller 61 from the third selector 92 to the fourth selector 93, and the bitmap read out from the buffer memory 95 through the second selector 91. And control to output to the MPEG2 decoder 89.

  The third DMA transmission path 107 has a wider bus width than the second DMA transmission path 97 for bitmap transmission. For example, the second DMA transmission line 97 is composed of 8 data lines and 4 control lines, whereas the third DMA transmission line 107 is 16 data lines, 24 address lines, It consists of three control lines. This prevents a large difference in the user's perceived speed between the playback of the video stream and the playback of the bitmap.

  Next, a transfer application applied to a PC (Personal Computer) in order to use the portable HDD moving image playback apparatus 100 will be described.

  FIG. 7 shows a display window 201 of recorded contents displayed on the PC by this transfer application. In the recorded content display window 201, a list of the names, creation dates, and states of whether or not each video stream recorded on the PC or reserved for recording is displayed in the order of recording / recording reservation, for example. Is displayed below.

  When it is desired to transfer a desired video stream to the portable HDD video playback apparatus 100, the transfer window 202 is called, and the desired video stream in the recorded content display window 201 is dragged and dropped with a mouse. Then, it drops into the transfer video stream list display box 203 in the transfer window 202. As a result, information on the moving image stream is displayed in the transfer moving image stream list display box 203. Thereafter, by clicking on the transfer button 204 in the transfer window 202 with the mouse, if the portable HDD movie player 100 is connected to the PC, the movie stream from the PC to the portable HDD movie player 100 is displayed. The transfer starts immediately. When the portable HDD video playback device 100 is not connected to the PC when the transfer button 204 is clicked with the mouse, the transfer of the video stream is started as soon as the portable HDD video playback device 100 is connected. It has become.

  Here, various formats such as AVI (Audio Video Interleaved) and WMV (Windows (registered trademark) Media Video) are known for the moving image stream stored in the PC. Since the portable HDD video playback device 100 is designed to decode and play back a video stream in the MPEG2 format, the transfer application must transfer the video stream before transferring the video stream from the PC to the portable HDD video playback device 100. Is automatically converted to MPEG2, and the moving image stream converted to MPEG2 is automatically transferred from the PC to the portable HDD moving image playback apparatus 100.

  The above is the operation when the user manually transfers a desired moving image stream, or the moving image content has a capacity of several G (giga), and a considerable time is expected for data transfer. Therefore, this transfer application is provided with a transfer reservation function. When this transfer reservation function is used, the automatic transfer button 205 in the transfer window 202 is clicked with the mouse. Then, a window for designating the time for starting the automatic transfer is displayed, and the transfer start time desired by the user may be input and determined here. The transfer application stores the transfer start time specified by the user, and when the specified time is compared with the clock time, the transfer application is displayed in the transfer video stream list display box 203 of the transfer window 202. Each moving image stream is transferred from the PC to the portable HDD moving image playback apparatus 100 through format conversion.

  Note that the moving image streams displayed in the transfer moving image stream list display box 203 in the transfer window 202 are transferred in order from the top. The display order of the moving image stream can be freely changed by clicking the order change buttons 206 and 207 with a mouse. In other words, after selecting a video stream whose order is to be changed with the mouse, clicking the rank change button 206 once moves the rank of the selected video stream one place, and conversely, clicks the rank change button 207 once. As a result, the order of the selected moving image stream moves down by one. Furthermore, by selecting the selected moving image stream to be deleted with the mouse and clicking the delete button 208, the selected moving image stream can be deleted from the transfer moving image stream list display box 203 and removed from the transfer target.

  Next, operations and operation screens of the portable HDD moving image playback apparatus 100 will be described. FIG. 14 shows a processing procedure from power-on to the start of moving image reproduction.

  When the user presses the PWR key of the portable HDD video playback device 100, this is detected by the system controller 61, and the system controller 61 initializes each device according to the firmware stored in the ROM 73 (step 1401). ). Thereafter, the built-in timer is started (step 1402). Subsequently, the transfer of the video stream is started from the PC connected by USB to the portable HDD video playback device 100. When the transfer is completed, the portable HDD video playback device 100 receives a transfer completion notification from the PC as an external interrupt. (Step 1403). When receiving an external interrupt, portable HDD video playback device 100 creates a menu to be displayed on the screen and starts a menu process for displaying the menu (step 1404).

  First, an action menu 301 as shown in FIG. 8 is created and displayed. This action menu 301 displays information 302 relating to the moving picture stream such as the title name, creation date and time, and recording time of the last played moving picture stream, and items 303 to 307 indicating selectable action types. It has become. Action types include “return to title list display”, “play from continuation”, “play from the beginning”, “delete”, “fold claw”, and the like. The focus 308 is located in one of these items 303 to 307, and the user can freely shift the position of the focus 308 up and down by operating the menu selection related key 32 of the key operation unit 3. it can. The initial position of the focus 308 is always in the item “play from continuation”, so that the viewing of the moving image stream from the time when the previous playback was interrupted can be started immediately without the focus 308 shifting operation. That is, after the action menu 301 is displayed immediately after the system is started, the user can watch the moving image stream from the time when the previous reproduction was interrupted by pressing the ENTER key 31 of the key operation unit 3 as it is.

  When the focus is shifted to the item “return to title list display” and the ENTER key 31 of the key operation unit 3 is pressed, a title list 401 as shown in FIG. 9 is displayed instead of the action menu 301. . In the title list 401, title items 402 to 408 of all moving image streams recorded in the HDD 24 of the portable HDD moving image reproducing apparatus 100 are displayed. The focus 409 is positioned in one of the title items 402 to 408, and the user freely moves the position of the focus 409 up and down by operating the menu selection related key 32 of the key operation unit 3. be able to. The initial position of the focus 409 is always in the item of the last reproduced title, so that the user can recognize the last viewed title. The user can view another title by moving the focus to the title item to be viewed from the title list 401 by operating the menu selection related key 32 and pressing the ENTER key 31.

  Returning to the flowchart of FIG. 14, when the user selects a title to be viewed as described above (step 1405), reading of the title video stream from the HDD 24 is started (step 1406). Then, reproduction processing of the moving image stream read from the HDD 24 is performed (step 1407). That is, the moving image stream read from the HDD 24 is DMA-transferred to the buffer memory 95 and buffered, and then DMA-transferred to the MPEG2 decoder 89 for decoding. The LCD controller 99 drives the LCD 21 based on the moving image data output from the MPEG2 decoder 89, thereby displaying the moving image on the screen of the LCD 21. On the other hand, the audio data decoded by the MPEG2 decoder 89 is converted into an analog signal by the D / A converter 101 and then sent to the headphones connected to the headphone terminal 10 (step 1407).

  When the item “reproduce from the beginning” 305 is selected by the user in the action menu 301, the moving image stream of the last reproduced title is reproduced from the beginning.

  When the “delete” item 306 is selected by the user in the action menu 301, the HDD 24 is deleted from the moving image stream of the title reproduced last. That is, a video stream of a title that has been viewed can be deleted from the HDD 24 with a few operations.

  When the “fold claw” item 307 is selected by the user in the action menu 301, deletion prohibition protection is applied to the corresponding video stream recorded in the HDD 24.

  Next, the environment setting screen will be described. FIG. 10 shows a screen 501 for setting the environment. This environment setting screen 501 can be called by pressing the SETUP button 41, for example. On the environment setting screen 501, various settings relating to display, various settings relating to audio, and the like can be performed. The environment setting screen 501 displays a display setting icon 502, an audio setting uncon 503, and other icons 504. One of the icons 502 to 504 is a menu selection-related key. The focus can be moved by the operation 32 and can be designated by the ENTER key 31. Display settings include backlight brightness adjustment 505, hue 506, color density 507, picture 508, contrast 509, alarm 510, and the like. Selection of each setting item can also be performed by moving the focus by operating the menu selection related key 32 and the ENTER key 31.

  Here, the alarm 510 sets the remaining time arbitrarily set by the user in the timer, and as shown in FIG. 11, the remaining time 511 is always displayed on a part of the screen during playback of the video stream. When the remaining time becomes zero, for example, it is a function of synthesizing and outputting an alarm sound or the like to the sound at the time of moving image reproduction. Since characters at the time of broadcasting may be inserted in television broadcasting or the like, it is easy for the user to make a mistake in the current time during viewing on the portable HDD video playback device 100 and to easily get over the train. Conceivable. By using the alarm function described above, the user can know the passage of the set time with an alarm while immersing himself in watching the moving image content, and can prevent overtime on a train or the like.

  FIG. 11 shows an example of a screen 602 that displays a playback elapsed (remaining) time 601 of the video stream. The playback elapsed (remaining) time 601 of this moving image stream is displayed as a numerical value 602 and an image 603 on the moving image stream being played, for example, by pressing the DISPLAY button 42.

  During playback of a moving image stream, the playback-related key 33 can be operated to fast-forward playback, rewind, increase / decrease the audio volume, and the like. As shown in FIG. 2, the reproduction-related key 33 is fast-forwarded by pressing the right position, and is rewound by pressing the left position. When the position on the right side of the reproduction-related key 33 is pressed once, fast-forwarding is performed for a predetermined time (for example, 15 seconds), and the key is continuously pressed while being pressed for a predetermined time. Fast forward is executed. In addition, when the continuous fast-forward is started and further pressed for a certain time, the fast-forward speed is increased. Specifically, the first continuous fast-forward speed is set to 15 times speed, and then the speed is switched to 60 times speed. In addition, when the position on the left side of the reproduction-related key 33 is pressed once, rewinding is performed for a predetermined time (for example, 15 seconds), and the key is pressed by continuing to press it for a predetermined time. In the meantime, continuous rewinding is performed. Furthermore, the rewinding speed is increased when the pressing is continued for a certain time after the continuous rewinding is started. Specifically, the first continuous rewinding speed is set to 15 times speed, and then switching to 60 times speed is performed.

  It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

1 is a perspective view showing an appearance of a portable HDD moving image playback device according to an embodiment of the present invention. It is the top view which showed the portable HDD moving image reproducing apparatus of FIG. 1 from the front. FIG. 2 is a cross-sectional view of the portable HDD video playback device of FIG. 1. It is the top view which looked at the portable HDD moving image reproducing apparatus of FIG. 1 from the top. It is the figure which showed the housing | casing 1 in sectional drawing of FIG. It is a figure which shows the structure of the circuit mounted in the main board | substrate. It is a figure which shows the display window of the recording content displayed on PC by the transfer application, and the window for transfer. It is a figure which shows an action menu. It is a figure which shows a title list. It is a figure which shows an environment setting screen. It is a figure which shows the screen which displays reproduction | regeneration progress (remaining) time of a moving image stream. It is sectional drawing which shows other embodiment of the portable HDD moving image reproducing apparatus of this invention. FIG. 2 is a plan view showing the internal structure of the portable HDD moving image reproducing device of FIG. 1 for each layer. It is a figure which shows the process sequence from the power-on of the portable HDD moving image reproducing apparatus of FIG. 1 to a moving image reproduction start.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 LCD screen part 3 Key operation part 4 Operation button 11 Exhaust hole 12 Intake hole 21 LCD
22 Main board 23 HDD board 24 HDD
25 Cooling fan 26 Composite inverter board 27 Battery pack 69 Temperature sensor 89 MPEG2 decoder 100 Portable HDD video playback device

Claims (4)

A hard disk drive that stores video streams;
A board on which electronic components for reading and playing a video stream from the hard disk drive are mounted;
A panel-shaped display unit for displaying a video reproduced by the electronic component ;
A key operation unit for accepting an input operation from the user;
The hard disk drive, the substrate , the display unit, and the key operation unit are incorporated, and a display surface exposure unit that exposes a display surface of the display unit and a key operation surface exposure unit that exposes the key operation surface of the key operation unit are provided. A front-side housing component adjacent to one surface; and a rear-side housing component facing the front-side housing component, the display being held across the key operation surface exposed portion of the front-side housing component One end on the opposite side to the position of the surface exposed portion has a semicircular cross-sectional shape together with one end of the back side casing component ;
An intake hole provided in a portion of the front side casing component located at one end of the semicircular cross-sectional shape of the casing;
An exhaust hole provided at the other end of the housing opposite the one end forming the semicircular cross-sectional shape ;
And a fan provided in the vicinity of the exhaust hole. Having a battery part for power supply,
2. The portable HDD moving image reproducing device according to claim 1, wherein the battery unit is built in an end portion having the semicircular cross-sectional shape . A temperature detector for detecting the temperature;
The portable HDD moving image reproducing apparatus according to claim 1, further comprising a control unit that controls a rotation speed of the fan based on a detection result of the temperature detection unit.   The portable HDD moving image reproducing apparatus according to claim 1, wherein the electronic component mounted on the substrate includes a circuit that performs hardware decoding of the moving image stream.

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