JP2008283374A - Portable terminal, program and recording medium - Google Patents

Abstract

Provided is a portable terminal capable of confirming a place suitable for recording / viewing next time by embedding position information or the like when recording terrestrial digital broadcasting in an external memory.
The portable terminal includes a position information acquisition means for acquiring position information of the terminal by a GPS function, a broadcast wave reception means for receiving terrestrial digital broadcasting, and a broadcast wave received by the broadcast wave reception means for SD- A recording means for recording in an external memory in a format compliant with the Video standard; and a radio wave condition acquisition means for acquiring a radio wave condition. The recording means is adapted to record a broadcast wave received by the broadcast wave receiving means. The information acquisition means captures the position information at the start of recording, and the radio wave status acquisition means captures the radio wave condition at the start of recording, sets it in the CompanyData field of the RDI packet, and records it in the external memory. When replaying, the recorded location and radio wave status were presented.
[Selection] Figure 3

Description

  The present invention relates to a portable terminal, a program, and a recording medium. Specifically, in a portable terminal having a GPS (Global Positioning Systems) function and a digital terrestrial broadcast receiving function (TV function), the received broadcast wave is transferred to an external memory. It relates to the recording / playback function.

In recent years, devices equipped with a GPS function for specifying the current position are generally used in mobile phones.
Also, with the discontinuation of analog broadcasting in 2011, the spread of terrestrial digital broadcasting has become widely used not only on televisions at home but also on mobile phones, and as a result, people can watch television broadcasting in real time. Mobile phones equipped with a recording function are used for users who cannot.

However, when viewing or recording using the TV function of a mobile phone, it is not possible to view or record normally depending on the radio wave condition, antenna direction, and location of movement (for example, out of service area, block noise, or sound interruption) Etc.).
For example, even in places where the radio wave condition seems to be excellent, such as in the city center, depending on the location, there is a possibility that buildings or the like will be obstructed, and normal viewing and recording may not be performed.
For this reason, it is unclear for the user where normal content can be viewed by viewing and recording.

  As a method for solving this problem, the position information and the radio wave situation when the SD-Video format can be normally recorded in the external memory are recorded, and the recording instruction is issued next time by referring to the information. Can do.

Currently, in the still image (JPEG (Exif)) function, the Exif standard that stipulates that various GPS information is embedded, including north latitude / south latitude / east longitude / west longitude and latitude / longitude is standardized.
However, in the SD-Video standard for recording in an external memory with the TV function, a field that can embed GPS information is not defined, and position information cannot be embedded in content.

  Therefore, even if a field that manages the location information at the time of recording by linking with the recorded content is provided in the mobile phone, the link destination is meaningful when the external memory is used in another mobile phone. Will not lead to a drastic solution.

  The present invention has been made in consideration of the above-described circumstances. When a TV function is used for recording in an external memory according to the SD-Video standard, position information or the like is embedded in a specific area of the SD-Video standard. An object of the present invention is to provide a portable terminal, a program, and a recording medium capable of confirming a place suitable for recording / viewing from the next time.

In order to solve the above-described problems, the portable terminal of the present invention has the following configuration.
The portable terminal records position information acquisition means for acquiring position information of the terminal itself with a GPS function, broadcast wave reception means for receiving terrestrial digital broadcasting, and broadcast waves received by the broadcast wave reception means in an external memory. A recording means, and a radio wave condition acquisition means for acquiring a radio wave condition, and the recording means records the broadcast wave received by the broadcast wave receiving means when the position information acquisition means starts recording. And the radio wave status acquisition means fetches the radio wave status at the start of recording, and records the radio wave status together with the location information in the external memory together with the recording of the broadcast wave.
In addition, a recording status display means is provided, and the broadcast station name of each recorded content, position information at the time of recording, and radio wave status can be listed and presented to the user.

  The recording means records in a format compliant with the SD-Video standard, and the position information (north latitude (N) or south latitude (S), latitude (numerical value), east longitude (E) or west longitude (W), longitude ( (Numerical value)) and the radio wave condition (a radio wave level of strong, medium, weak, or out of service area) is set in a CompanyData field of an RDI (Real-time Data Information) packet (non-encrypted area). Further, whether the position information and the radio wave status have been acquired is set in the Company ID field.

  Further, in the case where a playback unit that plays back the content recorded in the external memory is provided, when the playback unit plays back the designated content in the external memory, the location where the content is recorded and the radio wave status To present.

  Also, as each means of the portable terminal having the above-described configuration, a program for causing the computer to function is created, or the program is recorded on a computer-readable recording medium, and the program is executed by the computer. The above problem can also be solved by this.

  According to the present invention, the use of the specific areas (“Company ID” field and “Company Data” field) of the RDI packet has the following excellent effects.

(1) When recording to an external memory using the TV function, the radio wave level (strong / medium / weak / out of service area) and the position information at the time of recording can be set in the content at the same time, so the target content can be played back. When recording the same broadcast station and program broadcast from the next time onward, it is possible to indicate to the user where the video was recorded and what radio wave level it was. Can recognize places suitable for recording and viewing.

(2) Since the position information and the radio wave level are embedded in the content itself, the same operation can be obtained even if the corresponding external memory is used to operate on another portable terminal of the same manufacturer.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to a mobile terminal of the invention will be described with reference to the drawings.

Currently, there is no position information setting field or embedding means for content recorded in an external memory in the SD-Video format. In addition, even if location information is managed by linking to recorded content and the mobile terminal body is used, if the external memory is inserted into another mobile device, the content cannot be linked to location information. .
Therefore, in the present invention, for each content, position information is embedded in a specific area in the SD-Video standard and written to an external memory.

  Normally, a data stream configuration when recording terrestrial digital broadcasting in an external memory is called a Transport Stream Object Data File (hereinafter referred to as “TOD file”), as shown in FIG. 1, and includes one or more ETS (Extended Transport). Stream) packet (1 packet: composed of 192 bytes).

The specific area for setting location information used in the present invention is provided in a Real-time Data Information (hereinafter “RDI”) packet which is the first ETS packet in the TOD file.
The RDI packet is used to carry various types of information (such as copyright information) regarding the stream, and basically stores field information compliant with the SD-Video standard.

Of the Transport Packet (188 bytes) of this RDI packet, “Company ID: 4 bytes” and “Company Data: 60 bytes” other than the standard area of the first 92 bytes and the latter 32 bytes can be set uniquely by each manufacturer. (In other words, it is defined as an area that can be freely set by each manufacturer).
Further, since the RDI packet is a non-encrypted packet, there is an advantage in processing performance that the data in this packet does not need to be decrypted at the time of setting and reference.

In the present invention, when receiving a terrestrial digital broadcast using the TV function and recording it in an external memory, the position information acquired using the GPS function and the radio wave status at this time (strong, medium, weak, out of service area, etc.) Will be set in the “Company ID” and “Company Data” fields described above (see FIG. 2).
In addition, when referring to the position information when the broadcast recorded in the external memory is played back or recorded, it is possible to present the user to the user from the above-mentioned field so that a suitable place for recording or viewing can be confirmed. it can.

  Hereinafter, as a mobile terminal according to the embodiment, a mobile phone equipped with a TV (one-segment broadcasting of digital terrestrial broadcasting) function, a broadcast wave recording / playback function, and a GPS function will be described as an example, but the present invention is not limited thereto. The present invention can be easily applied to a PDA (Personal Digital Assistant) or a portable PC (Personal Computer) equipped with a TV function, a recording / playback function, and a GPS function.

  FIG. 3 is a block diagram illustrating a functional configuration of the mobile terminal according to the present embodiment. In FIG. 3, the mobile terminal 1 includes a control unit 11, an operation unit 12, a display unit 13, a storage unit 14, a speaker 15, a broadcast. A wave receiving unit 16, a broadcast processing unit 17, a recording unit 18, a playback unit 19, a position information acquisition unit 20, a radio wave status acquisition unit 21, and a recording status display unit 22 are provided.

The control unit 11 controls each unit of the mobile terminal 1.
The operation unit 12 includes numeric keys and various function keys. When a key press is received by a user operation, the control unit 11 receives a signal indicating reception, recording, reproduction, or the like of a broadcast program according to the received key operation. To send.
The display unit 13 includes a liquid crystal panel, and displays images of a broadcast program to be received and images such as a menu executable on the mobile terminal 1 in accordance with instructions from the control unit 11.
The storage unit 14 is a general term for memories inserted from the outside in addition to the memory provided inside the main body, and is a general nonvolatile memory or hard disk. The storage unit 14 stores programs and various data for operating the mobile terminal 1 and recorded broadcast programs.
The speaker 15 outputs audio data for broadcasting and telephone functions.

The broadcast wave receiving unit 16 receives the broadcast wave transmitted from the broadcast base station, and outputs the received broadcast wave to the broadcast processing unit 17 and the recording unit 18.
The broadcast processing unit 17 outputs the video data obtained by demodulating and decoding the received broadcast wave to the display unit 13 and the audio data to the speaker 15.

The position information acquisition unit 20 acquires and outputs current position information (latitude, longitude, altitude), time information, and the like where the mobile terminal 1 exists from a GPS signal received from a GPS satellite.
The radio wave status acquisition unit 21 determines and outputs the radio wave status (strong, medium, weak, out-of-service radio wave level) based on the electric field strength of the broadcast wave.

The recording unit 18 records the received broadcast wave in the storage unit 14 in the SD-Video format.
Here, the recording unit 18 starts the TV function by the user, and transitions to recording preparation in response to a recording start instruction.
In the recording preparation state, (1) the current position information of the mobile terminal 1 and (2) the radio wave status of the broadcast wave are acquired and set in the specific area (“CompanyData” field) of the RDI packet described above.

The position information is acquired by activating the position information acquisition unit 20, and the latitude and longitude information is converted into characters in the following format.
For latitude, the distinction between north latitude and south latitude is character (N) and character (S), respectively, and latitude (numerical value) is converted into a two-digit number (0 ° to 90 °).
For longitude, the distinction between east longitude and west longitude is character (E) and character (W), respectively, and longitude (numerical value) is converted to a three-digit number (0 ° to 180 °).

  For the radio wave status, the radio wave status acquisition unit 21 is activated, and the electric field strength of the broadcast wave is converted into a radio wave level of any one of the characters “strong”, “medium”, “weak”, and “out of service area”.

  In the recording preparation state, the characters acquired as described above are set in the “CompanyData” field of the RDI packet in the following order.

(1) Latitude distinction (1 byte),
(2) Latitude value (2 bytes),
(3) Longitude distinction (1 byte),
(4) Longitude value (3 bytes),
(5) Radio wave level (4 bytes).

Next, when the preparation stage is completed, the recording unit 18 sequentially records the RDI packet and the subsequently received ETS packet in the SD-Video format in the storage unit 14. This process is the same as a normal recording operation.
In the above description, the position information and the radio wave level are set as character strings in the “CompanyData” field, but they may be set as bit codes.

The operation of the recording unit 18 will be described using the flowchart of FIG.
After the TV function is started by the user (step S101), the user enters a recording preparation state triggered by a recording start instruction from the user (step S102).
When the recording preparation state is entered, the position information acquisition unit 20 is called to acquire position information (step S103).

  When the latitude is set in the position information (step S104 / YES), the north latitude (N) or the south latitude (S) is distinguished and the latitude value is coded (step S105).

  Next, when longitude is set in the position information (step S106 / YES), the distinction between east longitude (E) or west longitude (W) and the numerical value of longitude are encoded (step S107).

Furthermore, the radio wave status acquisition unit 21 is called to acquire the encoded radio wave level (step S108).
The encoded latitude, longitude, and radio wave level are set in the “CompanyData” field of the RDI packet (step S109).
A valid flag (0x0001) indicating that the position information and the radio wave level have been acquired is set in the “Company ID” field of the RDI packet (step S110), and the process proceeds to step S112.

  On the other hand, if no latitude or longitude is set in the position information (steps S104 / NO, S106 / NO), the invalid flag (0x0000) indicating that the position information (latitude or longitude) and the radio wave level could not be acquired. ) Is set in the “CompanyID” field of the RDI packet (step S111), and the process proceeds to step S112.

  After completing the recording preparation state, the RDI packet and the subsequent ETS packet are written in the storage unit 14, and then the recording is continued, and the recording is terminated when the recording is stopped as instructed by the user (step S112).

Next, when the user operates the operation unit 12 to call the recording status display unit 22, the recording status display unit 22 refers to the RDI packet for all contents recorded in the storage unit 14 (external memory). The location information and radio wave status are acquired, and the program name and broadcast station name are obtained only for the content recorded with the location information and radio wave status, and the content name, broadcast station name, location information (latitude , Longitude) and radio wave status (radio wave level) are presented on the display unit 13 to the list display user side. Here, the position information and the radio wave status are displayed as they are when they are character-coded, and are displayed after being converted into character codes when they are bit-coded. In addition, the content broadcasting station name and program name are stored in the PRGxxx.existing directory (ROOT \ SD-Video \ PRGxxx \ (xxx is 001 to FFF [hexadecimal])) in the storage unit 14 (external memory). Obtained from the PRG_EXT (Program Extra Data) field in the PRG_INFO (Program Information File) stored in the PGI file.
The user refers to this list, determines a place for viewing or recording a desired broadcast program, and performs viewing or recording at that place.

The operation of the recording status display unit 22 will be described using the flowchart of FIG.
The number of SD-Video format contents that have already been recorded in the storage unit (external memory) 14 is searched, all the detected contents are set as the list targets, and the search for the contents that are the list targets is completed. The next process is repeated (step S201 / NO).

  First, if the “CompanyID” field in the content RDI packet is a valid flag (step S202 / YES), position information (north / south latitude, latitude, east / west classification, longitude number from the “CompanyData” field) ) Is acquired (step S203).

Next, the radio wave condition (strong / medium / weak / out-of-range radio wave level) is acquired from the “CompanyData” field in the RDI packet (step S205).
Further, the broadcast station name and program name are acquired from the PRG_EXT field of the PRG_INFO of this content (step S205).

  On the other hand, when the “Company ID” field in the RDI packet of the content is an invalid flag (NO in step S202), it is assumed that the location information and the radio wave status to be acquired are not included, and this content is excluded from the list target. The process returns to step S201 to search for the next recorded content.

When the search of all contents is completed (step S201 / YES), the position information (north latitude / south latitude classification, latitude number, east longitude / west classification, longitude) is obtained for the contents for which position information and radio wave conditions have been acquired. Number), radio wave status (strong / medium / weak / out-of-service radio wave level), broadcast station name, and program name are listed (step S206). The broadcast station name and program name are acquired from the PRG_EXT field in the PRG_INFO of the storage unit 14.
This list is displayed on the display unit 13 (step S207).

The playback unit 19 plays back the content specified by the user from the SD-Video format content recorded in the storage unit 14.
Here, the playback unit 19 starts the playback function by the user, the content to be played back is specified from the storage unit 14 by the user, and transitions to playback preparation in response to the playback start instruction.
In the playback preparation state, the position information and the radio wave status of the broadcast wave are acquired from the specific area (“CompanyData” field) of the RDI packet of the designated content, and displayed together with the broadcast station name and program name of the content. The broadcast station name and program name of this content are acquired from the PRG_EXT field in the PRG_INFO of the storage unit 14.
When the reproduction preparation state ends, the reproduction unit 19 reproduces the content.

The operation of the playback unit 19 will be described using the flowchart of FIG.
After the playback function is started by the user, the content to be played back is specified by the user, and the playback start state is triggered by the playback start instruction (step S301).
When the playback preparation state is entered, if the “Company ID” field in the RDI packet of the designated content is a valid flag (step S302 / YES), position information (north / south latitude classification, number of latitudes, etc.) from the “CompanyData” field. East longitude / west division, longitude number) are acquired (step S303).

Next, the radio wave status (strong / medium / weak / outside radio wave level) is acquired from the “CompanyData” field in the RDI packet (step S304).
Further, the broadcast station name and program name are acquired from the PRG_EXT field of the PRG_INFO of this content (step S305).
The position information (north latitude / south latitude classification, latitude number, east longitude / west classification, longitude number), radio wave status (strong / medium / weak / outside radio wave level), broadcasting station name, and program name are displayed on the display unit 13. After the display (step S306), the designated content is reproduced (step S307).

  On the other hand, when the “CompanyID” field in the RDI packet of the designated content is an invalid flag (NO in step S302), it is assumed that the acquisition target position information and radio wave status are not included, and this content is reproduced. (Step S307).

  Note that the present invention is not limited to the above-described embodiment, and various modifications and corrections can be made without departing from the scope of the present invention. For example, a program that causes a computer to function as each unit of the mobile terminal that constitutes the embodiment is created, written in advance in a recording medium, and the program recorded in the recording medium is stored in a memory or storage provided in the terminal Needless to say, the object of the present invention is achieved by storing the program in a device and executing the program using a central processing unit (CPU).

In this case, the program itself read from the recording medium realizes the functions of the above-described embodiments, and the program and the recording medium recording the program also constitute the present invention.
In addition, the program includes a case where the functions of the above-described embodiment are realized by processing in cooperation with an operating system or another application program based on an instruction of the program.

  The program for realizing the functions of the above-described embodiments includes a disk system (for example, magnetic disk, optical disk, etc.), a card system (for example, memory card, optical card, etc.), and a semiconductor memory system (for example, ROM, nonvolatile memory). Etc.) and a recording medium of any form such as a tape system (for example, magnetic tape, cassette tape, etc.).

  Or you may make it receive the said program stored in the memory | storage device via a communication network or a broadcast wave directly from a server computer. In this case, the storage device of this server computer is also included in the recording medium of the present invention.

  As described above, by programming and distributing the functions of the above-described embodiment, the cost can be reduced, and the portability and versatility can be improved.

  The present invention can be applied to any mobile device in general having a function of receiving terrestrial digital broadcasting, a function of recording received terrestrial digital broadcasting, and a GPS function.

It is a data structure in SD-Video format. It is a usage form of the portable terminal which concerns on this embodiment. It is a block diagram which shows the structure of the portable terminal which concerns on this embodiment. It is a flowchart explaining operation | movement of a video recording part. It is a flowchart explaining operation | movement of a recording condition display part. It is a flowchart explaining operation | movement of a reproducing part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Portable terminal, 11 ... Control part, 12 ... Operation part, 13 ... Display part, 14 ... Memory | storage part, 15 ... Speaker, 16 ... Broadcast wave receiving part, 17 ... Broadcast processing part, 18 ... Recording part, 19 ... Playback , 20 ... Position information acquisition unit, 21 ... Radio wave status acquisition unit, 22 ... Recording status display unit.

Claims (9)

  Position information acquisition means for acquiring position information of the terminal by the GPS function, broadcast wave reception means for receiving digital terrestrial broadcasting, and recording means for recording the broadcast wave received by the broadcast wave reception means in an external memory, When the broadcast unit receives the broadcast wave received by the broadcast wave receiving unit, the recording unit captures the position information of the timing to start recording by the position information acquisition unit and records the broadcast wave. And a portable terminal for recording in the external memory.   2. The portable terminal according to claim 1, further comprising a radio wave condition acquisition unit that acquires a radio wave condition, wherein the recording unit starts recording when the broadcast wave received by the broadcast wave reception unit is recorded. A portable terminal characterized in that the radio wave status at the time of recording is captured by the radio wave status acquisition means, and the radio wave status is recorded in the external memory together with the recording of broadcast waves together with the position information.   3. The portable terminal according to claim 1, wherein the recording unit records in a format compliant with the SD-Video standard, and sets the position information and the radio wave status in a CompanyData field of an RDI packet. Mobile terminal.   The mobile terminal according to any one of claims 1 to 3, wherein the position information includes north latitude (N) or south latitude (S), latitude (numerical value), east longitude (E) or west longitude (W), and longitude (numerical value). A mobile terminal characterized by being.   5. The mobile terminal according to claim 2, wherein the radio wave condition is a radio wave level of strong, medium, weak, or out of service area.   6. The portable terminal according to claim 2, further comprising: a recording status display unit that lists a broadcast station name of each recorded content, positional information at the time of recording, and radio wave status, and presents the list to the user. A portable terminal characterized by that.   6. The portable terminal according to claim 2, further comprising a playback unit that plays back the content recorded in the external memory, wherein the playback unit plays back the specified content in the external memory. A mobile terminal that presents the location where the content was recorded and the radio wave status.   The program for functioning a computer as each means of the portable terminal in any one of Claims 1 thru | or 7.   A computer-readable recording medium on which the program according to claim 8 is recorded.

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