JP4121725B2 - Portable viewing device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a portable viewing device capable of viewing a television or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, portable television receivers have been provided. Such devices receive terrestrial analog broadcasts with a built-in small tuner and project received images on a liquid crystal display panel. In recent years, encoded video data based on MPEG4 (Moving Picture Experts Group 4) is recorded on a memory card, and this memory card is loaded into a slot of a portable viewing device, so that recorded video can be enjoyed on the go. Be able to. The encoded video data based on MPEG4 can be obtained by passing a video received by a normal television broadcast or a video taken by a handy camera through an MPEG4 encoder, or by downloading using the Internet. .
[0003]
[Problems to be solved by the invention]
In this way, advanced video coding technology and downsizing of equipment have made it possible to enjoy video easily even when away from home, but there is a need for a portable viewing device with excellent usability. ing.
[0004]
An object of this invention is to provide the portable viewing apparatus excellent in usability in view of said situation.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a portable viewing device of the present invention includes a tuner that receives terrestrial digital broadcasting and acquires encoded video / audio data, and stores the encoded video / audio data in a memory card or a built-in memory. Means for reading the encoded video / audio data from the memory card or the built-in memory, and decoding the encoded video / audio data read from the memory card and the encoded video / audio data from the tuner on the display. And a means for displaying audio and outputting audio, and informing the user to replace the memory card when the remaining amount of the encoded video / audio data is less than or equal to a predetermined amount during storage in the memory card. means and, when the memory card after the notification is in the mounted state, the current off in the state of being stored progression to the memory card attachment state It will be removed from the portion previously recorded in the yl, characterized in that to ensure the storage region of the encoded video and audio data received newly.
[0008]
Furthermore, the portable viewing device of the present invention assigns a priority to a file stored in a memory card and coexists with a priority deletion mode for deleting from an existing file with a low priority. You may be comprised so that alternative permission with both in-file deletion mode or both permission can be performed. If the priority-corresponding deletion mode is permitted and the current file deletion mode is not permitted, an existing file having a priority lower than that given to the current file may be deleted. If the priority deletion mode is allowed and the current file deletion mode is allowed, the existing files lower than the priority given to the current file are deleted, and there are no existing files to delete. When it becomes impossible to append, the current file deletion mode may be executed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0012]
As shown in FIGS. 1 and 2, the stationary peripheral device 1 and the portable viewing device 2 of this embodiment constitute a broadcast viewing system. In this system, the stationary peripheral device 1 receives an analog broadcast, and the encoded video / audio data obtained by encoding the received broadcast is inserted into a slot 101 (for example, a compact flash card (trademark)). ) Or multimedia card (trademark, etc.). The main body 1a of the stationary peripheral device 1 is designed to be vertically long, and has a leg portion 1b at the lower portion thereof to prevent overturning. The stationary peripheral device 1 is provided with a power button and operation buttons (play / pause, stop, and feed) related to viewing, but is not provided with operation buttons for channel selection. And the accommodation recessed part 1c is formed in the near side in the main-body part 1a of the stationary peripheral apparatus 1, The portable viewing-and-listening apparatus 2 can be inserted and mounted | worn in this accommodation recessed part 1c. In this attached state, the portable viewing device 2 is charged from the stationary peripheral device 1.
[0013]
The portable viewing device 2 has a substantially square shape and a flat shape, and is configured to be battery-driven. The portable viewing device 2 receives the terrestrial digital broadcast by the tuner 230, displays the video on the liquid crystal display panel 202, and outputs the sound from the earphone 203. Also, the encoded video / audio data is read from the memory card 3 inserted into the slot 201, the video is displayed on the liquid crystal display panel 202, and the audio is output from the earphone 203. A touch panel 211 is pasted on the liquid crystal display panel 202, and a desired instruction can be given by operating the panel with a touch pen or the like. Note that operation buttons (play / pause, stop, feed, volume, etc.) relating to viewing are provided on the casing.
[0014]
Hereinafter, the circuit configurations of the stationary peripheral device 1 and the portable viewing device 2 will be described in detail with reference to FIG.
[0015]
First, the stationary peripheral device 1 will be described. The tuner 102 receives an analog broadcast and outputs this broadcast reception signal. Tuning information for starting tuner 102 and channel selection information (channel information) for receiving an arbitrary broadcast are provided from CPU 110 via I / O (input / output) circuit 103 and system bus 104. The CPU 110 receives channel selection command information (designated channel information, designated time information, etc.) from the user from the memory card 3 via the system bus 104, the PCMCIA interface 105, and the slot 101. The switch 106 has an input unit for inputting the broadcast reception signal and an input unit for inputting an external signal. The switch 106 selects one of the signals and supplies the selected signal to the A / D conversion circuit 107.
[0016]
The A / D conversion circuit 107 converts an analog signal into a digital signal and supplies it to an MPEG4 (Moving Picture Experts Group 4) encoder 108. In accordance with MPEG4, the MPEG4 encoder 108 describes, for example, the background in the video and the person in the background individually as objects, adds shape information to handle each object of this arbitrary shape, and performs DCT processing in the same way as MPEG2. Or a motion vector process or the like is performed to generate a video packet, and a continuous bit stream is output. The audio is also subjected to predetermined encoding, and the audio encoded data is incorporated into the bit stream. The SDRAM 109 is used in the above processing of the MPEG4 encoder 108.
[0017]
The bit stream (encoded video / audio data) output from the MPEG4 encoder 108 is stored in the memory card 3 via the system bus 104, the PCMCIA interface 105, and the slot 101.
[0018]
Two sets of the slot 101 and the PCMCIA interface 105 are provided. In addition to the memory card 3, the PHS data card 4 and the like can be mounted in the slot 101.
[0019]
The charging circuit 113 includes a circuit that converts alternating current from a commercial power source into a direct current, and the like. When the portable viewing device 2 is attached to the stationary peripheral device 1 as shown in FIG. The charging power is supplied to the portable viewing device 2 through the mobile phone.
[0020]
The CPU 110 performs the above-described operation control of the tuner 102 and the processing (recording processing) for storing the output of the MPEG4 encoder 108 in the memory card 3, and also data transmission / reception when the PHS data card 4 is mounted in the slot 101, Control of each functional unit based on the above, read / write control of the Flash ROM 111 and the DRAM 112, and the like are also performed.
[0021]
Next, the portable viewing device 2 will be described. MPEG4 bit stream data (encoded video / audio data) stored in the memory card 3 is supplied to the MPEG4 decoder 204 via the PCMCIA interface 220 and the system bus 213. The tuner 230 that receives the terrestrial digital broadcast takes out the MPEG4 bit stream data broadcast by the terrestrial digital broadcast and provides it to the MPEG4 decoder 204 or to the system bus 213 for recording to the memory card 3 or SDRAM 219. Or supply. The MPEG4 decoder 204 decodes the bit stream data to obtain a quantization coefficient and a motion vector, and supplies video data obtained by performing inverse DCT transformation, motion compensation control based on the motion vector, and the like to the graphics controller 205. The graphics controller 205 performs processing such as color adjustment on video data (for example, R, G, B data). The graphics controller 205 also performs processing for displaying characters or the like (operation buttons, menu screens, EPG screens based on program information acquired from terrestrial digital broadcasts), etc., instructed to be output from the CPU 209 on the liquid crystal display panel 202. The audio decoder 206 receives the audio code data in the bit stream from the MPEG4 decoder 204 and decodes it to generate audio data. The SDRAM 210 is used in the above processing of the MPEG4 decoder 204.
[0022]
The LCD controller 207 drives the liquid crystal display panel 202 based on the video data supplied from the graphics controller 205. The D / A converter 208 receives the audio data output from the audio decoder 206, performs D / A conversion, generates a right (R) sound analog signal and a left (L) sound analog signal to generate the earphone 203. To give.
[0023]
Operation information for the touch panel 211 is given to the CPU 209 via the dedicated interface 212 and the system bus 213. The CPU 209 grasps the contents of the command based on the correspondence between the operation information and the display of the operation buttons on the liquid crystal display panel 202, and executes necessary processing.
[0024]
The main body key 214 corresponds to the operation buttons (play / pause, stop, feed) related to viewing described above. Operation information for the main body key 214 is given to the CPU 209 via the interface 215 and the system bus 213. The CPU 209 executes necessary processing based on the operation information.
[0025]
In addition, a communication block 216 and an interface (for example, Bluetooth (trademark), etc.) 217 are provided to enable a wireless network. Further, a flash ROM 218 and an SDRAM 219 are also provided. The battery 221 is a secondary battery, and obtains power from the stationary peripheral device 1 and stores it. The mobile phone unit 231 is used for normal phone calls.
[0026]
The CPU 209 also performs processing for the wireless network, data transmission / reception when the PHS data card 4 is installed in the slot 201, control of each functional unit based on the received data, read / write control of the FlashROM 218 and SDRAM 219, and the like. ing. Further, when the user designates a received program (channel and time designation) using the touch panel 211 or the like, processing for storing the information in the memory card 3 is performed.
[0027]
FIG. 4 is a flowchart showing received program recording processing (processing for recording encoded video / audio data of the received program in the memory card 3 mounted in the slot 201) in the portable viewing device 2. The CPU 209 detects the remaining amount of the memory card 3 during the process of recording the program on the memory card 3 (step S1). If the memory card 3 has no remaining amount or the remaining amount is low (YES in step S2), an alarm is given (step S3) to prompt the user to replace the memory card 3. Then, it is determined whether or not the memory card 3 loaded in the slot 201 has been removed (step S4). If the memory card 3 has not been removed (NO in step S4), it is determined whether it is necessary to delete the file recorded on the memory card 3 (step S5). When this step S5 is first performed, it is determined that the file needs to be deleted because the memory card 3 has no remaining amount or the remaining amount is small. If it is necessary to delete the file, the low priority file is deleted from the memory card 3 (step S6), the recording process is continued, and the remaining amount of the memory card is detected. If it is not necessary to delete the file, the recording process is continued and the remaining memory card is detected.
[0028]
If it is determined in step S4 that the memory card has been removed, the encoded video / audio data of the received program is temporarily recorded in a built-in memory (eg, SDRAM 219) (step S7). Then, it is determined whether or not the replacement of the memory card 3 has been completed (step S8). If the replacement of the memory card 3 has not been completed, the recording in the built-in memory is continued (step S7). When the replacement of the memory card 3 is completed, the encoded video / audio data in the built-in memory is transferred to the memory card (step S9), and the newly received encoded video / audio data is recorded in the replaced memory card 3. (Step S10). Then, it is determined whether or not the recording is finished (step S11). If not finished, the process proceeds to step S1, and if finished, the process is finished.
[0029]
In this way, the user can know that the memory card 3 has run out during recording of the program by the alarm notification, and the memory card 3 can be replaced quickly. As a form of notification, in addition to notification by an alarm (electronic sound), notification by a warning lamp, notification by displaying a warning message on the screen, notification by notifying a user's mobile phone registered in advance by e-mail, etc. . When the memory card 3 is not yet replaced after the alarm, the low priority file is deleted from the existing files on the memory card 3, so that the storage area for the encoded video / audio data of the received program is deleted. Can be secured for a while. Then, when the memory card 3 is removed from the slot 201, the encoded video / audio data of the received program is stored in the built-in memory. The encoded video / audio data in the built-in memory is transferred to the memory card 3 and the newly received encoded video / audio data is also stored in the memory card 3 in succession.
[0030]
The priority of the file will be described. For example, in the case of recording that is not specified, the file is given a priority “low”, and in the case of recording from what is specified, the priority is given “high”. It is done. It should be noted that the recording is handled by classification such as “loop recording” and “normal recording”, and the label “loop recording” or “normal recording” is attached to the file, and “loop recording” has a priority “low”, “ “Normal recording” can also have a priority “high”. Then, when only “normal recording” remains in the memory card 3, processing such as not deleting the file can be performed. Whether “loop recording” or “normal recording” is selected, user settings are received at the time of recording, and a label of “loop recording” may be attached by default when user settings are not made. In addition, the label may be changed after viewing the file properties after recording. In addition, the existing file deletion described above is not performed, and encoded video / audio data newly received may be stored in the built-in memory after alarm notification and during replacement of the memory card 3.
[0031]
By the way, if the entire recordable content cannot be secured by managing the entire recorded content as an index format file (indexFile) as the file format, the recording is continued while crushing its own recording head portion. You may do it. Apart from this, there are also files for determining the importance of other recorded contents. You can record while deleting other files without using Index. That is, the current file (indexFile) that is in the process of being stored in the attached memory card 3 is deleted from the previously recorded portion, and a storage area for newly received encoded video / audio data is secured. You may make it perform (Loop recording permission). In this mode, permission / non-permission may be changed based on priority determination described later. Also, a priority is given to the file stored in the memory card 3, and a priority deletion mode (importance judgment permission) for deleting from an existing file with a low priority is also coexisted. You may be comprised so that alternative permission with deletion mode or both permission can be performed. In the current file deletion mode (Loop recording permission), permission / non-permission may be changed in relation to the priority determination. Further, when the priority deletion mode is permitted and the current file deletion mode is not permitted, an existing file having a lower priority than the priority given to the current file may be deleted. In addition, when the priority deletion mode is permitted and the current file deletion mode is permitted, the existing file lower than the priority given to the current file is deleted, and the existing file to be deleted is deleted. If it becomes impossible to append to the current file, the in-file deletion mode may be executed.
[0032]
The index file has a file structure as shown in FIG. The index file will be briefly described below.
[0033]
indexFile
CodeTop // First valid data file CodeEnd // Last valid data file CodeTime // Recording time, unit time (in this example, 5 min.), And code number N
FormatHeader /// Recording format (common to Code 1 to N) is specified.
Code1 // For example, MPEG recording file Code2 for about 5 minutes // For example, MPEG recording file Code3 for about 5 minutes
...
CodeN // For example, MPEG recording file Code1 of about 5 minutes
[Header, Data]
[Header, Data]
[Header, Data]
...
[Header, Data]
CodeN
[Header, Data]
[Header, Data]
[Header, Data]
...
[Header, Data]
[0034]
Usually, when shooting is started from Code 1 and a new Code area (Code N + 1) cannot be added, it ends with Code N. CodeTop is Code1, and CodeEnd is CodeN.
[0035]
If Loop recording is not permitted and importance determination is permitted, the existing file having a lower importance than the own file (current file) (Loop recording permission determination may be performed according to the importance) is deleted. Then, a new Code area (Code N + 1) is added. Exit when no more can be added.
[0036]
If Loop recording is permitted and a new Code area (CodeN + 1) cannot be added during recording, CodeTop is changed to Code2, and recording is continued with CodeEnd being Code1.
[0037]
If Loop recording is permitted and importance determination permission is allowed, an existing file having a lower importance level than the own file (current file) (Loop recording permission determination may be performed according to the importance level) is deleted. Then, a new Code area (Code N + 1) is added. When it becomes impossible to add, CodeTop is changed to Code2, and Recording is continued with CodeEnd being Code1.
[0038]
When the above index file is taken out (output to another device, writing to another recording medium, etc.), the index file may be converted into a single continuous recording file and output.
[0039]
It should be noted that by loading the PHS data card 4 in the slot 201, page browsing or the like using electronic mail or the Internet can be performed. Therefore, the portable viewing device can be used as a network terminal in addition to watching TV or playing a video player. Further, the stationary peripheral device 1 is also provided with a communication block 216 and an interface (for example, Bluetooth (trademark), etc.) 217 provided in the portable viewing device 2 and the communication block and interface of the same standard, and the stationary peripheral device 1 A wireless network may be established with the portable viewing device 2. According to this, channel selection information can also be given from the portable viewing device 2 to the stationary peripheral device 1 via the wireless network. Also, such a wireless network can transmit bit stream data in MPEG4 from the stationary peripheral device 1 to the portable viewing device 2, and according to this, the portable viewing device 2 is currently broadcasting. You can watch analog broadcast video in real time. Note that the stationary peripheral device 1 and the portable viewing device 2 may be connected by a wired network, and channel selection information and bit stream data may be transmitted in the same manner as described above. Also, instead of sending bit stream data in MPEG4 from the stationary peripheral device 1 to the portable viewing device 2, a composite video signal (which may be a component video signal) is sent from the stationary peripheral device 1 to an AV terminal (or S terminal). Or the D terminal, etc.) may be sent to the portable viewing device 2.
[0040]
The broadcast is viewed in real time with the portable viewing device 2 mounted in the receiving recess 1c of the stationary peripheral device 1, and the operation buttons of the portable viewing device 2 are displayed on the stationary peripheral device 1 as shown in FIG. If the mobile device is hidden by the stationary peripheral device 1, the operation button is arranged in the same manner as the operation button so that the portable viewing device 2 can be operated on the stationary peripheral device 1 side. It may be. The operation information for the operation buttons of the stationary peripheral device 1 can be sent to the portable viewing device 2 using a wireless network, a wired network, or a wired network. Further, the stationary peripheral device 1 may be provided with a speaker. The received broadcast sound is output from the speaker of the stationary peripheral device 1, and the video is displayed on the liquid crystal display panel 202 of the portable viewing device 2. You may be able to do that.
[0041]
【The invention's effect】
As described above, according to the present invention, the user can know that the memory card has run out during recording of a program, and can quickly replace the memory card. . If the configuration is such that the low priority file is deleted from the existing files on the memory card after the notification and before the replacement of the memory card, the encoded video / audio data of the received program is retained while retaining the important file. The storage area can be secured for a while. If the encoded video / audio data of the received program is stored in the built-in memory when the memory card is removed, a situation such as non-recording of the data being exchanged does not occur.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing a mounting state of a portable viewing device and a stationary peripheral device according to an embodiment of the present invention.
FIG. 2 is an external perspective view of a portable viewing device according to an embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration of a portable viewing device and a stationary peripheral device according to the embodiment of the present invention.
FIG. 4 is a flowchart showing processing when the remaining amount of the memory card runs out during program recording of the portable viewing device according to the embodiment of the present invention.
FIG. 5 is an explanatory diagram showing the contents of an index file format.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stationary type peripheral device 102 Tuner 108 MPEG4 encoder 113 Charging circuit 2 Portable viewing apparatus 202 Liquid crystal display panel 204 MPEG4 decoder 219 SDRAM
230 Terrestrial digital tuner 231 Mobile phone unit 3 Memory card 4 PHS data card

Claims (4)

A tuner that receives terrestrial digital broadcasting and obtains encoded video / audio data, means for storing the encoded video / audio data in a memory card or a built-in memory, and the encoded video / audio data in a memory card or a built-in memory Means for reading from the memory card, means for decoding the encoded video / audio data read from the memory card and the encoded video / audio data from the tuner, displaying the video on the display, and outputting the audio, and the encoded video / audio data A means for informing the user to replace the memory card when the remaining amount becomes less than or equal to a predetermined amount during storage in the memory card, and when the memory card is in the mounted state after the notification, the mounted state Delete from the previously recorded part of the current file that is in the process of being stored in the memory card Portable viewing device, characterized in that to secure a storage area for encoding video and audio data take only. The portable viewing device according to claim 1 , wherein priority is given to a file stored in a memory card, and a priority-compatible deletion mode for deleting from an existing file having a low priority is coexisted. A portable viewing device configured to be able to selectively permit or permit both of the current file deletion mode. 3. The portable viewing device according to claim 2 , wherein when the priority deletion mode is permitted and the current file deletion mode is not permitted, an existing file having a priority lower than that given to the current file is deleted. A portable viewing device characterized by that. The portable viewing device according to claim 2 , wherein when the priority deletion mode is permitted and the deletion mode within the current file is permitted, an existing file lower than the priority given to the current file is selected. A portable viewing device that performs deletion in an existing file when an existing file to be deleted is lost and cannot be additionally recorded.

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