JP2008300902A - Mobile terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile terminal capable of controlling subtitle output according to various conditions such as ambient noise, whether or not an earphone is inserted, etc. <P>SOLUTION: The mobile terminal can receive broadcast data, and controls whether a subtitle obtained by decoding subtitle data included in the broadcast data is displayed by a display means or whether the subtitle data is decoded according to whether the earphone is connected or the level of the ambient noise to the mobile terminal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mobile terminal capable of drawing subtitles.

  In recent years, car navigation systems and portable terminals that can reproduce terrestrial digital television broadcasts that have been started under the nickname of One Seg have been commercialized. In addition to video and audio, caption broadcasting is also provided for terrestrial digital television broadcasting. In Patent Document 1, even when subtitle non-display is set, a broadcast that displays subtitles when a specific operation state (such as a call state or a state in which the volume is reduced by a user) that reduces the output volume of audio is displayed The receiver is listed.

JP 2006-279592 A

  In the conventional proposal, captions are automatically displayed when in a specific operation state that reduces the output volume. However, since the portable terminal may be used outdoors, even if the output volume is not reduced, the user may not be able to hear the sound of the television due to the influence of ambient noise and the like. In addition, when an earphone is inserted and a television is being watched, it is easy to hear the sound even if the surroundings are a little noisy.

  Therefore, an object of the present invention is to provide a portable terminal capable of controlling subtitle output according to various conditions such as ambient noise and whether or not an earphone is inserted.

  The mobile terminal according to the present invention is capable of receiving broadcast data, and displays subtitles obtained by decoding subtitle data included in the broadcast data on the display unit according to the presence / absence of connection of earphones or the noise level around the mobile terminal. Whether or not subtitle data is decoded.

  ADVANTAGE OF THE INVENTION According to this invention, the portable terminal which can control a caption output according to various conditions, such as ambient noise and the presence or absence of earphone insertion, can be provided.

  FIG. 1 is a block diagram illustrating an example of the structure of a mobile terminal. The mobile terminal is a communication unit 101 that transmits / receives voice information to / from a base station during a voice call, a tuner 102 that receives broadcast data such as terrestrial digital television broadcast, and a user of the mobile terminal instructs broadcast playback, etc. A key input unit 103 used for inputting a video, a control unit 104 for controlling reproduction of broadcast data, a decoding unit 105 for decoding compressed moving images, decoded data and a program executed by the control unit 104 It consists of a storage unit 106 for storing various data such as data, a display unit 107 for displaying moving images and still images, a speaker 108 for outputting sound, an earphone terminal 109 for connecting earphones, and a receiver 110 for capturing ambient sounds. Yes. Note that the user of the mobile terminal can select whether or not to output subtitles to the display unit 107 when viewing the broadcast on the mobile terminal by operating the key input unit 103, and whether or not to output subtitles. it can.

  FIG. 2 is a flowchart illustrating an example of a caption output control process when the portable terminal is set to caption output OFF.

  The tuner 102 receives broadcast data and inputs a TS (Transport Stream) of the broadcast data to the storage unit 106 (S201). In this example, since the caption output is set to OFF, video information and audio information are decoded from the TS, and caption information is not decoded (S202). Hereinafter, the decoded video information and audio information are referred to as video data and audio data.

  The audio data is, for example, PCM (Pulse Code Modulation) data and is stored in the storage unit 106 (S203). Then, the video data is output to the display unit 107, and the audio data is output to the speaker 108 or the earphone terminal 109. (S204).

  When the audio data is stored in the storage unit 106, measurement of the elapsed time since the storage is started, and it is determined whether or not a predetermined time such as 5 seconds has elapsed (S205). If the predetermined time has not elapsed, the process returns to S201 and the process is repeated. Note that the elapsed time in S205 is not limited to the elapsed time since the audio data was stored in the storage unit 106, and may be the elapsed time since the caption data was not output.

  On the other hand, if the predetermined time has elapsed, ambient sound is captured by the receiver 110 (S206). At this time, when audio data is output from the mobile terminal, the output sound output from the mobile terminal is mixed with the ambient sound, so the output sound is removed from the captured ambient sound and external noise is extracted (S207 ). Specifically, the noise is extracted by overlapping the reverse phase data of the audio data stored in the storage unit 106 in S203 with the ambient sound or subtracting the audio data from the ambient sound.

  Thereafter, the presence / absence of insertion of the earphone into the earphone terminal 109 and the output volume of the audio data are detected (S208). Then, a data table defining the relationship between the presence / absence of the earphone and the output volume and the threshold value of the noise is read (S209), and the threshold value corresponding to the presence / absence of the earphone insertion and the current output volume is read (S210).

  FIG. 3 shows an example of the data table. For example, when the earphone is inserted and the volume is 7, “Earphone is present” in 301 “Earphone presence / absence” in FIG. 3 and “greater than 5” in 302 “volume” are read out, and “threshold” in 303 40 dB of 307 in “Value” is read out as a threshold value.

  After reading the threshold value, it is determined whether or not the noise extracted in S207 is larger than the threshold value (S211). For example, if the extracted noise is 20 dB, the threshold is 40 dB, and the noise is below the threshold, the elapsed time being measured is reset to 0 (S212), the process returns to S201, and the process is repeated.

  Also, for example, if there is no earphone in S208, the volume is 3, and in this case the threshold is 10 dB, and the noise extracted in S207 is 20 dB, the noise is larger than the threshold, so the surroundings are noisy Then, it is determined that the situation is difficult for the user to hear the voice, and the process is switched to the process of outputting the caption data (S211).

  If it is determined in S211 that the noise is larger than the threshold value, TS is input to the storage unit 106 as in S201 (S213), and subtitle information is decoded in addition to video information and audio information (S214). Hereinafter, the decoded caption information is referred to as caption data.

  Then, the audio data is stored in the storage unit 106 (S215), the video data and the caption data are output to the display unit 107, and the audio data is output to the speaker 108 or the earphone terminal 109 (S216). Note that the output of audio data in S216 may be stopped when switching to processing for outputting caption data. However, if subtitle information is not included in the TS, subtitle data is not decoded and output even if it is determined in S211 that the noise is greater than the threshold value. It is desirable to stop the output of audio data only when

  When the audio data is stored in the storage unit 106 in S215, the measurement of the elapsed time since the storage is started, and it is determined whether or not a predetermined time such as 5 seconds has elapsed (S217). If the predetermined time has not elapsed, the process returns to S213, and if it has elapsed, the process returns to S206 to repeat the process. Note that the subtitle information included in the TS includes the time for drawing the subtitle, and the drawing period of the currently output subtitle can be grasped. Therefore, in S217, instead of determining whether or not the predetermined time has elapsed, it may be determined whether or not the drawing period of the currently output caption has elapsed. Thus, by determining whether or not the drawing period has elapsed, it is possible to prevent the caption data from being erased while the video data corresponding to the caption data is being output. As described above, without the user having to operate the key input unit 103 to switch the subtitle output from OFF to ON, the user is noisy according to the ambient noise, earphone insertion status, volume, etc. Since it is automatically switched to perform caption output when it is determined that the voice is difficult to hear, user convenience can be improved.

  Moreover, although an example of the subtitle output control method in the mobile terminal when the subtitle output is set to OFF has been described first, similar control may be performed when the subtitle output is set to ON. In this case, the process is started from S213 instead of S201 in FIG. By controlling in this way, the caption output was initially turned on because the surroundings were noisy, but when the surroundings became quiet, the user operated the key input unit 103 to switch the caption output to OFF. Without stopping, subtitle output can be stopped.

  Note that the flowchart shown in FIG. 2 is an example, and the processing order may be changed, or one flowchart may be divided into a plurality of processes and processed by the control unit 104 at the same time. For example, subtitle information may be decoded in S202, but subtitle display may not be performed in S204.

  In the above control method, subtitle output is switched ON / OFF without user operation according to the surrounding situation, but depending on the user, subtitle output is turned on or off regardless of the surrounding situation. May wish. Therefore, when the user performs a specific operation, it is desirable to switch the caption output ON / OFF regardless of the surrounding situation. For example, a caption output setting data table as shown in FIG. 4 is stored in the storage unit 106, and control is performed based on this table.

  In the caption output setting data table, a specific operation 601 and caption control 602 corresponding to the specific operation 601 are stored. For example, when the user presses the 5 key, “caption output” 603 is assigned, which is a function for switching the subtitle output to ON, and when the 6 key is pressed, the subtitle output is switched to OFF. “Subtitle non-output” 604 is assigned. In addition, when the earphone is removed, “subtitle output” 605 which is a function for switching the subtitle output to ON is assigned, and when the earphone is inserted, “subtitle non-output” is a function for switching the subtitle output to OFF. "606" is assigned. The data table shown in FIG. 4 is an example, and the present invention is not limited to this. Other operations may be registered as specific operations. Further, as subtitle control, instead of “subtitle output” or “subtitle non-output”, other control such as “return to subtitle ON / OFF setting set before starting viewing” may be registered. For example, a data table may be provided for each TV channel, day of the week, time, or program. When the control process shown in FIG. 2 is performed, the control unit 104 determines whether or not a specific operation registered in the caption output setting data table has been performed. In response to a specific operation, switching to caption output or caption non-output is performed.

  FIG. 5 is a flowchart illustrating an example of a procedure for determining whether or not a specific operation is performed and switching subtitle output. It is determined whether or not a key is pressed in the key input unit 103 (S501). If no key is pressed, the process proceeds to S503. If there is a key press in S501, it is determined whether the pressed key is 5 key or 6 key (S502). If applicable, the process proceeds to S504. If there is no corresponding key press in S502, it is determined whether the earphone insertion / removal status has been changed (S503). Here, it is determined whether the earphone is removed from the situation where it is inserted or the earphone is inserted from the situation where it is removed. If the earphone insertion / removal status has not been changed, the process is repeated from S501, and key input or earphone insertion determination is performed.

  If the earphone insertion / extraction status is changed in S503, the subtitle output setting data table of FIG. 6 is read (S504). In S505, when the 5 key is pressed or when the earphone is removed from the inserted state, switching to subtitle output is performed. In addition, when the 6 key is pressed or when the earphone is inserted because the earphone is removed, the subtitle is not output. Note that the flowchart shown in FIG. 5 is merely an example, and the processing order may be changed, or one flowchart may be divided into a plurality of processes and processed by the control unit 104 at the same time.

  The embodiment described above is an example, and the present invention is not limited to this. For example, in the threshold data table of FIG. 3, only “earphone presence / absence” 301 or “volume” 302 may be a factor. In addition to “earphone presence / absence” 301 and “volume” 302, another factor may be added. In addition, a value such as “Less than 5” or “greater than 5” in “Volume” 302 and a value such as “10 dB” in “Threshold” 303 can be set in advance by the user or terrestrial digital television broadcasting. It may be possible to change and set at the time of reception. In S201 and S213, the broadcast data is received by the tuner 102. However, the present invention is not limited to this. For example, the processing of S202 and S214 is performed using recorded data stored in the storage unit 106. You may make it do.

It is a block diagram which shows an example of the structure of a portable terminal. It is a flowchart which shows an example of the subtitle output control method in a portable terminal. It is an example of the data table which prescribed | regulated the relationship between the presence or absence of an earphone, output volume, and the threshold value of noise. It is an example of a caption output setting data table. It is a flowchart which shows an example of the procedure which determines the presence or absence of specific operation and switches subtitle output.

Explanation of symbols

101 ... Key input unit, 102 ... Decoding unit, 103 ... Display unit, 104 ... Control unit, 104 ... Storage unit, 105 ... Communication unit
DESCRIPTION OF SYMBOLS 101 ... Communication part, 102 ... Tuner, 103 ... Key input part, 104 ... Control part, 105 ... Decoding part, 106 ... Memory | storage part, 107 ... Display part, 108 ... Speaker, 109 ... Earphone, 110 ... Receiver

Claims (5)

A portable terminal capable of receiving broadcast data having video data and caption data,
Receiving means for receiving broadcast data;
Display means capable of displaying video and subtitles using broadcast data received by the receiving means;
Connection means for connecting the earphones;
Obtaining means for obtaining a noise level around the portable terminal;
Control means for controlling whether or not to display subtitles on the display means according to whether or not an earphone is connected to the connection means or the noise level acquired by the acquisition means;
A portable terminal characterized by comprising: A portable terminal capable of receiving broadcast data,
Receiving means for receiving broadcast data;
Decoding means for decoding video data and subtitle data included in the broadcast data received by the receiving means;
Display means for displaying video and subtitles using video data and subtitle data decoded by the decoding means;
Connection means for connecting the earphones;
Obtaining means for obtaining a noise level around the portable terminal;
Control means for controlling whether or not to decode the subtitle data by the decoding means according to the presence or absence of the connection of the earphone to the connecting means or the noise level acquired by the acquiring means;
A portable terminal characterized by comprising: A receiver for receiving terrestrial digital television broadcasting;
A display unit for displaying video and subtitles using the television broadcast received by the receiving unit;
A speaker for outputting sound using a television broadcast received by the receiver;
A receiver that captures external noise,
A storage unit for storing a threshold value of the noise level;
When the external noise level acquired by the receiver is larger than the threshold value stored in the storage unit, subtitles are displayed on the display unit, and the external noise level is stored in the storage unit A control unit that controls not to output subtitles to the display unit when the threshold value is below,
A portable terminal characterized by comprising: The mobile terminal according to claim 3, wherein
Has the function to set and store time information,
When subtitles are not output, external noise is acquired after the time information of digital terrestrial television broadcasting has elapsed, and subtitles are output if the acquired noise level is greater than the threshold,
When subtitles are output, when the same subtitle drawing period ends, external noise is acquired, and subtitles are not output if the acquired noise level is smaller than the threshold, Terminal. The mobile terminal according to claim 3 or 4,
It has a function to record subtitle output and non-output setting data in association with a specific operation such as key press or earphone insertion / extraction,
During the terrestrial digital television broadcast playback, has a function of recognizing the specific operation,
The subtitle output and non-output setting data are read when the specific operation is recognized, the subtitle is output when the subtitle is output, and the subtitle is not output when the subtitle is not output. Mobile device.

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