JP4812640B2 - Digital broadcast receiver - Google Patents

Description

The present invention relates to a digital broadcast receiving apparatus capable of receiving a digital broadcast, and more particularly to a digital broadcast reproducing method of a digital broadcast receiving apparatus that can be carried and carried.

In recent years, a technique of incorporating a TV tuner in a mobile phone is known (for example, see Patent Document 1). In terrestrial digital broadcasting, broadcasting using a transmission band of 1 or 3 segments is scheduled mainly for small portable receivers with high portability.

When such a mobile phone as a digital broadcast receiving device is, for example, a foldable mobile phone, the digital broadcast is usually performed with the main display screen exposed (that is, in an open state) by expanding the housing. It is common to reproduce the video of the program on the main display screen.
Japanese Patent Laid-Open No. 2002-9920

  However, depending on the situation of the user, it may not be possible to continue watching the main display screen with the mobile phone open. For example, when a user arrives while watching a digital broadcast at a station platform, the user has to get on a full train, or the user has to move to another location while watching is there.

  In such a case, since the user cannot watch the screen, the user wears the earphone on the mobile phone and listens only to the sound of the digital broadcast through the earphone. There is a problem that the program content is difficult to understand by half.

The present invention has been made in view of the above points, and an object of the present invention is to receive a digital broadcast that can recognize the contents of the digital broadcast even when the display screen cannot be viewed. It is to provide a method.

In order to overcome the above-described problems, the present invention provides a digital method reproduction method for a digital broadcast receiving apparatus that receives a digital broadcast including a first sound and a second sound for explaining a program. Either the state or the closed state is detected, and the digital broadcast is reproduced with the second sound on condition that the closed state is detected.

Preferably, the digital broadcast is reproduced with the first sound on condition that a change from the closed state to the open state of the digital broadcast receiving device is detected.

Preferably, the control means determines whether or not the second sound exists based on a data signal received by the receiving means.

  Preferably, only when it is determined that the second sound is present, the digital broadcast is reproduced with the second sound on the condition that the closed state of the digital broadcast receiving device is detected.

  According to the present invention, the contents of digital broadcasting can be recognized even when the display screen cannot be viewed.

  Hereinafter, a digital broadcast receiving apparatus according to the present invention will be described with reference to the accompanying drawings, taking a mobile phone having a digital broadcast receiving function as an example.

  FIG. 1 is an external view of a mobile phone 1 having a digital broadcast receiving function according to the embodiment.

  As shown in the figure, the mobile phone 1 is a so-called foldable mobile phone in which a first housing 101 and a second housing 102 are connected by a movable mechanism. 1A is a front view in the opened state (open state), FIG. 1B is a front view in the closed state (closed state), and FIG. 1C is a view in the open state. FIG. 1D shows a side view and FIG. 1D shows a side view in the closed state.

  FIG. 2 is a block diagram illustrating a system configuration of the mobile phone 1 according to the embodiment.

  The main components of the mobile phone 1 will be described below with reference to FIGS.

  In order to perform wireless communication using radio waves, the wireless unit 13 modulates various data such as voice information and electronic mail processed by the control unit 11 and transmits the modulated data to a base station (not shown) through the transmission / reception antenna 12.

  In addition, the wireless unit 13 demodulates various data such as e-mail and voice information transmitted from the base station by a wireless signal and received by the transmission / reception antenna 12, and sends the data to the control unit 11.

  The memory 14 stores various data possessed by the mobile phone of the present embodiment, such as application programs such as calls, mails, and Internet browsers, mail data, and various address book data in which names and telephone numbers are registered. For example, in order to activate an application (digital broadcasting application) for receiving digital broadcasting (one-segment broadcasting), the control unit 11 loads a program of the application stored in the memory 14 into the RAM area.

  The key operation unit 15 includes a plurality of operation keys.

  As shown in FIG. 1, a plurality of keys include a web key 15a for connecting to the Internet, a mail key 15b for executing an e-mail function, a soft 1 key 15c and a soft 2 key 15f, up / down / left / right keys 15d, and processing. Corresponding to the decision key 15e for confirming the voice, the off-hook key 15g for speaking, the clear key 15h, the on-hook key 15i for talking, the numbers "0" to "9", "*", "#" It consists of a numeric keypad 15j.

  The up / down / left / right key 15d is a key that can be operated in four directions of up / down / left / right. For example, the channel selection operation can be performed by up / down the digital broadcast program (channel) by the up / down operation of the up / down / left / right key 15d.

  The receiving antenna 20, the tuner 16, the demodulating unit 17, and the TS separating unit 18 receive a digital broadcast from the mobile phone 1 and output a video signal / audio signal / data signal or the like.

  The receiving antenna 20 constantly receives digital broadcast waves continuously, and the tuner 16 selects a program (channel) instructed by the control unit 11 in accordance with an operation on the key operation unit 15 and selects the selected program. Broadcast content, that is, the transport stream (TS) is output to the demodulator 17.

  The demodulator 17 demodulates the transport stream (TS) of the selected program.

  When the demodulated transport stream (TS) is scrambled, descrambling is performed by a descrambler (not shown). That is, the descrambler performs a process of permitting reproduction by only a specific digital broadcast receiving apparatus (decrypting an encrypted broadcast of a limited reception method). When the transport stream (TS) is scrambled, it operates under the instruction of the control unit 11 and performs descrambling in accordance with the scramble processing method.

  In the transport stream (TS), as illustrated in an exemplary TS in FIG. 3, an audio signal, a video signal, a data signal, and the like are multiplexed on a packet basis. For example, an audio signal and a video signal are compression encoded by the MPEG method.

  For example, in MPEG2, the data signal is configured by SI (Service Information) as a part of PSI (Program Specification Information), and a program name, an electronic program guide (EPG), and the like are transmitted by the SI. The SI has EIT (Event Information Table) information including information related to the program such as the program name, broadcast date and time, and broadcast content.

  In the information related to the program in the EIT information, the type of audio in each program, for example, the type of whether or not it is a broadcast with explanation audio, the type of whether or not it is a bilingual broadcast, etc. are designated. . Therefore, by referring to this EIT information, it is possible to identify, for example, whether or not the program selected by the user is a broadcast with commentary audio.

  In the case of broadcasting with commentary audio, a normal audio signal (normal audio signal) and an audio signal for commentary on the video signal or program contents (explanatory audio signal) are multiplexed in the TS. . Here, the normal sound is normal sound, and the commentary sound is sound in which video and program contents are described in detail.

  In the mobile phone 1 according to the present embodiment, in the case of broadcast with explanation audio, the normal audio signal is reproduced by setting the audio output to be the main audio, and the explanation audio signal is reproduced by setting the sub audio. The

  The transport stream (TS) signal is separated into a video signal, an audio signal (sound / audio), and a data signal for each packet by the TS separator 18.

  The separated video signal is decoded by the image processing unit 19 and displayed on the display unit 23 as a video.

  The separated audio signal is decoded by the audio processing unit 22 and output from the speaker 24 as audio and / or sound.

  The content of the separated data signal is analyzed by the data processing unit 21, and the above-described EIT information and the like are supplied to the control unit 11.

  The image processing unit 19 decodes the separated video signal and outputs the video signal to the main display 231 and / or the sub display 232. It goes without saying that the image processing unit 19 displays not only the digital broadcast video but also information such as a standby screen image or a telephone number corresponding to the mobile phone function on the display unit 23.

  The voice processing unit 22 performs a predetermined process such as a filtering process or an encoding process on the user's voice collected from a microphone (abbreviated as a microphone as appropriate) 25 to generate a voice signal. The generated voice data is transmitted for a call to a base station (not shown) via the radio unit 13 and the transmission / reception antenna 12, for example.

  The audio processing unit 22 amplifies the audio data received via the transmission / reception antenna 12 and the radio unit 13 and the audio signal separated by the TS separation unit 18, and causes the speaker 24 to output sound.

  As shown in FIG. 1, in the mobile phone 1, the speaker 24 is composed of a first speaker 241 that is exposed only in the open state and a second speaker 242 that is exposed regardless of the open / closed state. Audio is output from the first speaker 241 when in the open state, and audio is output from the second speaker 242 when the mobile phone 1 is in the closed state. As shown in FIG. 2, when the earphone 30 is attached to the external terminal (EX) of the mobile phone 1, sound is output to the earphone 30.

  The open / close switch 26 is a switch for detecting the open / closed state of the mobile phone 1.

  As a specific configuration of the on / off switch 26, various technologies can be applied. For example, as shown in FIG. 1A, a contact portion is provided on each of the first casing 101 and the second casing 102. And in a closed state (FIG. 1B), the two contacts can be electrically non-conductive. Alternatively, one contact broadcast data may be a concave switch portion, and the other contact portion may be a convex portion that presses the switch.

  Further, the open / close switch 26 is turned on (ON state) when the cellular phone 1 is closed, and the open / close switch 26 is turned off (OFF state) when the mobile phone 1 is open.

  The control unit 11 is mainly composed of a microcomputer and controls the entire mobile phone 1. For example, the control unit 11 controls wireless transmission / reception of various information in the wireless unit 13, digital broadcast reception processing, audio information processing for the audio processing unit 22, information display control on the display unit 23, and key operation unit 15. The processing according to the input information from and the access control to the memory 14 are performed.

  The control unit 11 determines the open / close state of the mobile phone 1 by detecting the conduction state of the open / close switch 26 and performs a predetermined process according to the determination result.

  Based on the EIT information supplied from the data processing unit 21, the control unit 11 determines whether only the normal audio signal is included, or includes both the normal audio signal and the explanation audio signal, and the determination A predetermined process according to the result is performed.

  Next, a digital broadcast reproduction processing operation in the mobile phone 1 will be described.

  FIG. 4 is a flowchart showing a digital broadcast reproduction process when the cellular phone 1 is in the closed state.

  In FIG. 4, when it is determined that the open / close switch 26 is turned from OFF to ON, that is, the mobile phone 1 is changed from the open state to the closed state (step ST1), it is first determined whether or not the digital broadcast application is operating. (Step ST2). If it is in operation, it is further determined whether or not the currently viewed program is accompanied by commentary audio based on the EIT information extracted from the received transport stream (step ST3).

  If the commentary sound is attached, the sound type being reproduced is stored in the memory 14 (step ST4). The audio type in step ST4 is data for specifying whether the currently reproduced audio is the main audio or the sub audio. A normal audio signal is reproduced for the main audio, and an explanatory audio signal is reproduced for the sub audio.

  If the voice type is not the sub voice, that is, the main voice (step ST5), the voice type is switched to the sub voice (step ST6).

  When the mobile phone 1 is switched from the open state to the closed state by the above operation, the reproduced sound becomes a commentary sound accordingly. Therefore, the user can view the program contents even after the mobile phone 1 is folded. Can be recognized continuously.

  Further, at this time, since the cellular phone 1 is closed and the display unit 23 can no longer be seen, the decoding of the video signal of the received transport stream is stopped (step ST7), and the display on the display unit 23 is displayed. Stop (step ST8). This reduces power consumption and extends battery life.

  FIG. 5 is a flowchart showing digital broadcast playback processing in the open state of the mobile phone 1.

  In FIG. 5, when it is determined that the open / close switch 26 is turned from ON to OFF, that is, the mobile phone 1 is changed from the closed state to the open state (step ST9), first, it is determined whether or not the digital broadcast application is operating. (Step ST10). If it is in operation, it is further determined whether or not the currently watched program has commentary audio based on the EIT information extracted from the received transport stream (step ST11).

  When the commentary voice is attached, the type of voice reproduced in the previous open state stored in the memory 14 in step ST4 is read from the memory 14 (step ST12).

  If the type read from the memory 14 is normal audio (main audio) and the current audio type is not main audio, that is, sub audio (step ST13), the audio type to be reproduced is set to main audio. Switching (step ST14). Furthermore, decoding of the video signal of the received transport stream is restarted (step ST15), and display on the display unit 23 is started (step ST16).

  When the mobile phone 1 is switched from the closed state to the open state by the above operation, the reproduced sound is changed to the normal sound accordingly. The program content can be continuously recognized by automatically switching to (main audio).

  As described above, according to the mobile phone 1 according to the present embodiment, the main sound in which the normal sound signal is reproduced and the sub sound in which the commentary sound signal is reproduced according to the opening / closing operation of the housing. Switch adaptively. Therefore, even if the user who is viewing the digital broadcast by the display unit 23 has to close the mobile phone 1, it is possible to keep track of the program contents using the commentary audio. Further, when the cellular phone 1 is subsequently opened (when a change from the closed state to the open state is detected), it is possible to continuously grasp the program content by playing back with normal voice.

  Further, when viewing by commentary audio is desired by the user's selection, the display operation of the display unit 23 and the decoding process of the video signal are stopped by closing the mobile phone 1, so that the power consumption can be reduced, and the result As a result, it is possible to extend the viewing time (time that can be received). Furthermore, since the user does not need to pay attention to the display unit 23 when listening with the commentary voice, an unexpected accident such as carelessness in the front can be avoided particularly when the user is moving.

  The above-described embodiment is merely an example of the present invention, and those skilled in the art can appropriately modify the present invention without departing from the scope of the present invention.

It is a figure which shows an example of the external appearance shape of the mobile telephone which concerns on embodiment. 1 is a diagram illustrating an example of a system configuration of a mobile phone according to an embodiment. It is a figure which shows an example of a structure of TS (transport stream). 6 is a flowchart showing a reproduction operation in a closed state of the mobile phone according to the embodiment. 5 is a flowchart showing a reproduction operation in the open state of the mobile phone according to the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mobile telephone 11 ... Control part 12, 20 ... Transmission / reception antenna 13 ... Radio | wireless part 14 ... Memory 15 ... Key operation part 16 ... Tuner 17 ... Demodulation part 18 ... TS separation part 19 ... Image processing part 21 ... Data processing part 22 ... Audio processing unit 23 ... display unit 24 ... speaker 25 ... microphone 26 ... open / close switch 30 ... earphone

Claims (1)

In a digital broadcast reproducing method of a digital broadcast receiving apparatus that receives a digital broadcast including a first sound, a second sound for commentary on a program, and a video,
When the digital broadcast receiving device is detected to be in an open state or a closed state, the digital broadcast is reproduced with the second sound on the condition that the closed state is detected, and the video of the digital broadcast is decoded. If the current program is with commentary audio, it is determined whether the current program has been opened. A digital broadcast playback method that determines the sound and plays back the sound that was in the previous open state.

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