JP2004135219A - Screen display method and reception device for digital broadcasting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reception device capable of continuing a display for minimum information, even if it is switched from digital broadcasting to analog broadcasting. <P>SOLUTION: Data, supplied to a system controller 8 from a demultiplexer 3 during the reception of digital broadcasting, are outputted to a display control circuit 9 and are displayed on a monitor 10, at least a part of the accompanying data is stored in a memory 11. After a change from digital broadcasting to analog broadcasting is performed, the accompanying data stored in the memory 11 is supplied to the display control circuit 9 and displayed on the monitor 10. According to this arrangement, even if the device enters an area which is difficult to receive digital broadcasting and it is changed from digital broadcasting into analog broadcasting, the name of a broadcasting station and the name of the genre for the broadcasting station are continued to be displayed on the monitor 10, as long as a channel is not changed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a digital broadcast screen display method and a digital broadcast receiving apparatus, and more particularly, to an IBOC (In-Band On-Channel), which is a terrestrial digital radio broadcast in the United States, in response to switching between digital broadcast and analog broadcast. This is suitable for use in a method of controlling display.
[0002]
[Prior art]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-285101 In a system proposed to supply digital audio broadcasting in the frequency band of AM / FM radio, high sound quality (equivalent to CD for digital FM, equivalent to analog FM for digital AM) ), Various data services, and higher receivability (high-quality voice reception even under fading and multipath environments) than current analog broadcast waves are expected.
[0003]
In digital radio broadcasting, it is possible to broadcast data in addition to music and display characters and the like on a display device of a receiving terminal. Representative data among the data broadcasted from the broadcasting station and displayed on the receiving terminal are a song name, an artist name, a genre name, and the like. In addition, a broadcasting station name, a broadcasting station genre name, and the like, which are conventionally provided by RBDS (Radio Broadcasting Data System), may be displayed on the receiving terminal.
[0004]
However, until the transition to digital audio broadcasting is completely completed, many broadcasting stations require intermediate measures to simultaneously transmit analog signals and digital signals within the same band in which use is permitted. As a system corresponding to such an intermediate measure, IBOC, which is a terrestrial digital radio broadcast scheduled to be launched in the United States in the fall of 2003, is currently being developed.
[0005]
This IBOC is characterized in that digital broadcasting is performed in the same frequency band as conventional analog broadcasting. That is, as shown in FIG. 5, by adding a digital modulation wave to the sideband of the existing analog AM / FM wave, the current dial position is maintained (On-Band) in the current analog radio band (In-Band). Channel) digital radio broadcasting is transmitted. The audio portions of the analog broadcast and the digital broadcast superimposed on the same frequency band have the same broadcast program.
[0006]
The IBOC receiving terminal can perform seamless switching between analog and digital using such features. For example, high-quality digital broadcasts are usually received and played back, but when entering an area where digital broadcasts are difficult to receive, that is, when the digital broadcast reception intensity falls below a certain value, digital broadcasts are played. Automatically switch to analog broadcasting.
[0007]
[Problems to be solved by the invention]
However, when switching from digital broadcasting to analog broadcasting, there has been a problem that accompanying data that was abundantly displayed at the time of receiving digital broadcasting is hardly displayed. Another problem is that the user may not notice that the digital broadcast has been switched to the analog broadcast, and may give the impression that the sound quality has suddenly deteriorated.
[0008]
The present invention has been made to solve such a problem, and it is an object of the present invention to be able to continue to display minimum information even when switching from digital broadcasting to analog broadcasting. .
Another object of the present invention is to enable a user to intuitively recognize that the digital broadcast has been switched to the analog broadcast.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problem, in the present invention, at least a part of the data displayed on the screen at the time of receiving a digital broadcast is stored in a recording medium, and after switching from digital broadcast to analog broadcast is performed. Controls based on the data stored in the recording medium to continue displaying at least a part of the data displayed on the screen at the time of receiving the digital broadcast.
According to another aspect of the present invention, the screen display mode is changed between when receiving a digital broadcast and when receiving an analog broadcast.
[0010]
According to the present invention configured as described above, even when the user enters an area where digital broadcast reception is difficult and the digital broadcast is switched to the analog broadcast, the user explicitly specifies the digital broadcast receiving apparatus. Data that does not change unless an operation is performed (such as a broadcast station name or a broadcast station genre name) is continuously displayed until the explicit operation is performed. Alternatively, data (a song name, an artist name, a genre name, or the like) that may change according to a broadcast program without a user performing an explicit operation on the digital broadcast receiving device includes accompanying data included in the digital broadcast. Accordingly, the display is continued until a predetermined switching timing.
[0011]
Further, when the mode of the screen display is changed between the time of receiving the digital broadcast and the time of receiving the analog broadcast, it is possible to determine whether the currently received broadcast is digital or analog simply by looking at the screen display. Become intuitive.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating the configuration of the digital broadcast receiving apparatus according to the present embodiment. As shown in FIG. 1, the digital broadcast receiving apparatus according to the present embodiment includes an antenna 1, a tuner 2, a demultiplexer 3, a decoder 4, an audio processing circuit 5, a speaker 6, an operation unit 7, a system controller 8, and a display control circuit 9. , A monitor 10 and a memory 11.
[0013]
The antenna 1 receives IBOC terrestrial digital broadcasting in which analog broadcasting and digital broadcasting are superimposed on the same frequency band. The tuner 2 extracts multiplexed data corresponding to one channel selected by the user operating the operation unit 7 from a signal received via the antenna 1 based on an instruction from the system controller 8. The extracted multiplexed data is output to the demultiplexer 3.
[0014]
The demultiplexer 3 separates the IBOC multiplexed data supplied from the tuner 2 into main broadcast program data and its accompanying data. The main broadcast program is separated into analog broadcast and digital broadcast. The decoder 4 demodulates the data of the main broadcast program in a demodulation method corresponding to the modulation method in the broadcasting station, performs a predetermined error correction process, and outputs the resulting data to the audio processing circuit 5.
[0015]
The audio processing circuit 5 generates PCM audio data by performing predetermined processing on the audio data supplied from the decoder 4. Then, the PCM audio data is converted into an analog signal, and the analog signal is amplified at a predetermined amplification rate and output. The speaker 6 outputs audio corresponding to the analog audio signal output from the audio processing circuit 5.
[0016]
The operation unit 7 is for performing a switching operation of reception frequency (channel), a volume operation, and other various operations, and is configured by, for example, a remote controller (remote controller). Operation information of the operation unit 7 is provided to the system controller 8 and is controlled by the system controller 8. For example, the channel switching information is supplied from the system controller 8 to the tuner 2, and the broadcast of the designated channel is selectively received.
[0017]
The system controller 8 controls the entire digital broadcast receiving apparatus of the present embodiment. For example, the accompanying data separated by the demultiplexer 3 is taken into the system controller 8. The system controller 8 supplies the accompanying data to the display control circuit 9 to display the name of the currently-received broadcasting station, the name of the broadcasting station genre, the name of the currently viewed song, artist, and genre on the monitor 10. .
[0018]
Further, the system controller 8 switches between analog broadcasting and digital broadcasting in accordance with the detection signal (received electric field strength detection signal) output from the audio processing circuit 5. That is, the tuner 2, the demultiplexer 3, and the decoder 4 are normally controlled to process and reproduce high-quality digital broadcasts. However, when the digital broadcast reception intensity falls below a certain value, the digital broadcasts are converted to analog broadcasts. Control to automatically switch to broadcasting for processing.
[0019]
The memory 11 stores at least a part of the accompanying data displayed on the monitor 10 at the time of receiving the digital broadcast. For example, among the above-mentioned broadcast station names, broadcast station genre names, song names, artist names, genre names, etc., at least the currently received broadcast station name and broadcast station genre name are stored.
[0020]
The system controller 8 supplies the accompanying data to the display control circuit 9 and displays it on the monitor 10 as described above because the accompanying data is supplied from the demultiplexer 3 when receiving the digital broadcast. On the other hand, after switching from digital broadcasting to analog broadcasting, the supply of accompanying data from the demultiplexer 3 is stopped. In this case, by supplying the data stored in the memory 11 to the display control circuit 9, at least a part of the accompanying data (the name of the currently receiving broadcasting station, (Station genre name) is controlled to be continuously displayed on the monitor 10.
[0021]
FIG. 2 is a diagram illustrating an example of a screen displayed on the monitor 10 when switching from digital broadcasting to analog broadcasting. FIG. 2A shows a screen displayed when a digital broadcast is received. As shown in FIG. 2A, at the time of receiving a digital broadcast, abundant information such as the name of a currently-received broadcasting station or a genre of a broadcasting station, the name of a currently-viewed song, an artist, a genre, or an album is displayed. Have been. A digital waveform is displayed so that the user can visually recognize that a digital broadcast is being received.
[0022]
FIG. 2B shows a display screen after switching from digital broadcasting to analog broadcasting. As described above, when the broadcast is switched to the analog broadcast, the reception of the accompanying data is stopped. However, even in this case, the name of the broadcast station currently being received and the name of the broadcast station genre continue to be displayed as shown in FIG. The reception frequency can be displayed in analog broadcasting regardless of the presence or absence of accompanying data.
[0023]
After switching to the analog broadcast, the waveform display is switched to the analog wave so that the user can visually recognize that the analog broadcast is being received. Further, although it is difficult to understand from the drawing, the display color of the backlight and the font of the display characters also change according to the switching from digital broadcasting to analog broadcasting.
[0024]
FIG. 2C shows a display screen after switching channels during reception of analog broadcasting. In this case, the broadcast station name and the broadcast station genre name, which have been displayed until then, disappear based on the data stored in the memory 11. The above-described system controller 8 also performs such control. That is, when the channel controller operation information is input from the operation unit 7, the system controller 8 stops supplying the data stored in the memory 11 to the display control circuit 9.
[0025]
FIG. 3 is a flowchart illustrating an example of the operation of the system controller 8. In FIG. 3, the system controller 8 controls the tuner 2, the demultiplexer 3, and the decoder 4 so as to receive and reproduce a digital broadcast in an initial state (step S1). Then, the accompanying data included in the digital broadcast is supplied to the display control circuit 9 to display various information on the monitor 10 (step S2).
[0026]
Further, the system controller 8 stores at least a part (for example, a broadcast station name and a broadcast station genre name) of the accompanying data included in the digital broadcast being received in the memory 11 (step S3). At this time, the content of the accompanying data changes according to the content of the main broadcast program, but at least the latest (currently receiving) information may be stored in the memory 11.
[0027]
During the reception of the digital broadcast, the system controller 8 monitors whether the reception intensity of the digital broadcast has become smaller than a predetermined value (step S4). If the reception intensity is not smaller than the predetermined value, the process returns to step S1, and the reproduction of the digital broadcast is continued.
[0028]
On the other hand, when the reception intensity of the digital broadcast becomes lower than the predetermined value, the system controller 8 supplies the data stored in the memory 11 at that time to the display control circuit 9 so that the name of the currently receiving broadcast station can be obtained. And the genre of the broadcasting station are displayed on the monitor 10 (step S5). At this time, the display mode of the monitor 10 (display color of backlight, font of display characters, display of received waveform, etc.) is switched from digital broadcast to analog broadcast. Then, the tuner 2, the demultiplexer 3, and the decoder 4 are controlled so as to receive and reproduce the analog broadcast (Step S6).
[0029]
During the reception of the analog broadcast, the system controller 8 monitors whether the channel is switched by operating the operation unit 7 (step S7). If there is no change in the channel, it is further determined whether or not the reception intensity of the digital broadcast remains smaller than a predetermined value (step S8). If the reception strength of the digital broadcast is still smaller than the predetermined value, the process returns to step S6, and the analog broadcast is continuously reproduced. Thus, the broadcast station name and the broadcast station genre name are continuously displayed on the monitor 10 unless the channel is changed.
[0030]
On the other hand, if the reception strength of the digital broadcast has become larger than the predetermined value, the process returns to step S1, and the reproduction of the digital broadcast is restarted. After the digital broadcast is resumed, when the accompanying data is displayed on the monitor 10 in step S2, the display mode of the monitor 10 (display color of backlight, font of display characters, display of received waveform, etc.) is changed from that for analog broadcast. Return to digital broadcasting.
[0031]
If it is determined in step S7 that the channel has been changed during the reception of the analog broadcast, the system controller 8 stops supplying the data stored in the memory 11 to the display control circuit 9 and outputs the broadcast station name and the broadcast station name. The display of the broadcast station genre name is deleted from the monitor 10 (step S9). Thereafter, the process proceeds to step S8, where the reception of the analog broadcast is continued or the reproduction of the digital broadcast is restarted according to the reception strength of the digital broadcast.
[0032]
FIG. 4 is a flowchart showing another example of the operation of the system controller 8. In FIG. 4, the system controller 8 controls the tuner 2, the demultiplexer 3, and the decoder 4 to receive and reproduce a digital broadcast in an initial state (step S11). Then, the accompanying data included in the digital broadcast is supplied to the display control circuit 9 to display various information on the monitor 10 (step S12).
[0033]
In addition, the system controller 8 transmits the accompanying data included in the digital broadcast being received (the name of the currently-received broadcasting station or the name of the broadcasting station, the name of the currently-viewed song or artist, the name of the genre, the name of the album, the name of the song) The reproduction time is stored in the memory 11 (step S13). At this time, the content of the accompanying data changes according to the content of the main broadcast program, but at least the latest information may be stored in the memory 11.
[0034]
During the reception of the digital broadcast, the system controller 8 monitors whether the reception strength of the digital broadcast has become smaller than a predetermined value (step S14). If the reception intensity is not smaller than the predetermined value, the process returns to step S11, and the reproduction of the digital broadcast is continued.
[0035]
On the other hand, when the reception intensity of the digital broadcast becomes smaller than the predetermined value, the system controller 8 supplies the data stored in the memory 11 to the display control circuit 9 at that time, and the name of the currently receiving broadcast station or the like is displayed. The broadcast station genre name, the name of the currently viewed song or artist, the genre name, the album name, and the like are displayed on the monitor 10 (step S15). At this time, the display mode of the monitor 10 (display color of backlight, font of display characters, display of received waveform, etc.) is switched from digital broadcast to analog broadcast. Then, the tuner 2, the demultiplexer 3, and the decoder 4 are controlled so as to receive and reproduce the analog broadcast (Step S16).
[0036]
During reception of the analog broadcast, the system controller 8 monitors whether or not the switching timing determined by the playback time of the music stored in the memory 11 has come (step S17). For example, if the playback time of a song is 5 minutes, and if the digital broadcast is switched to the analog broadcast 2 minutes after the start of the song, it is determined whether the remaining 3 minutes have elapsed. .
[0037]
If it is determined that the remaining playback time has elapsed, the supply of data such as the song title, artist name, genre name, and album name stored in the memory 11 to the display control circuit 9 is stopped, and the display of the data is stopped. Is deleted from the monitor 10 (step S18). After the display is deleted, the process proceeds to step S21.
[0038]
On the other hand, if it is determined that the remaining playback time has not yet elapsed, the system controller 8 further determines whether or not channel switching has been performed by operating the operation unit 7 (step S19). When the channel is changed, the system controller 8 stops supplying the data of the broadcast station name and the broadcast station genre name stored in the memory 11 to the display control circuit 9 and deletes the display from the monitor 10. (Step S20). After the display is deleted, the process proceeds to step S21.
[0039]
After the processing in steps S18 and S20, or when it is determined in step S19 that there is no change in the channel, the system controller 8 determines whether the reception intensity of the digital broadcast remains smaller than a predetermined value (step S19). S21). Here, if the reception strength of the digital broadcast is still smaller than the predetermined value, the process returns to step S16, and the analog broadcast is continuously reproduced.
[0040]
On the other hand, when the reception strength of the digital broadcast becomes larger than the predetermined value, the process returns to step S11, and the reproduction of the digital broadcast is restarted. After the digital broadcast is resumed, when the accompanying data is displayed on the monitor 10 in step S12, the display mode of the monitor 10 (display color of backlight, font of display characters, display of received waveform, etc.) is changed from that for analog broadcast. Return to digital broadcasting.
[0041]
After switching from digital broadcasting to analog broadcasting by the above operation, at least the name of the currently viewed song, artist name, genre name, album name, and the like are determined in advance by the accompanying data stored in the memory 11. The display is continued on the monitor 10 until the switching timing. Further, the broadcast station name and the broadcast station genre name are continuously displayed on the monitor 10 unless the channel is changed.
[0042]
As described above in detail, according to the present embodiment, at least a part of the accompanying data displayed on the screen at the time of receiving the digital broadcast is stored in the memory 11, and the switching from the digital broadcast to the analog broadcast is performed. After that, based on the accompanying data stored in the memory 11, control is performed so that at least a part of the data displayed on the screen at the time of receiving the digital broadcast is continuously displayed.
[0043]
Thus, even if the user switches from digital broadcasting to analog broadcasting while entering an area where digital broadcasting is difficult to receive, it is possible to continue to display a broadcast station name or a broadcast station genre name unless the channel is changed. . Further, information such as a song name, an artist name, and a genre name can be continuously displayed until the reproduction of the song ends. Therefore, even after switching from digital broadcasting to analog broadcasting, the user can check the minimum information on the monitor 10.
[0044]
Further, in the present embodiment, the manner of screen display (display color of backlight, font of display characters, display of received waveform, etc.) is changed between digital broadcast reception and analog broadcast reception. Thus, the user can intuitively recognize whether the currently received broadcast is digital or analog, just by looking at the screen display. Therefore, the user can intuitively recognize that the digital broadcast has been switched to the analog broadcast.
[0045]
In the above embodiment, the broadcast station name, the broadcast station genre name, the song name, the artist name, the genre name, and the album name are described as examples of the accompanying data displayed on the monitor 10. However, these are merely examples, and the present invention is not limited thereto. The invention is not limited to this.
[0046]
Further, in the above embodiment, the example in which the display color of the backlight, the font of the display characters, and the display of the received waveform are changed between the time of receiving the digital broadcast and the time of receiving the analog broadcast has been described. It is not limited to this. For example, "digital broadcast" or "analog broadcast" may be displayed in characters.
[0047]
In the above embodiment, IBOC is described as an example of digital broadcast to be received, but the present invention is not limited to this. That is, any digital broadcast receiving device configured to receive digital broadcasts including music and accompanying data and switch to analog broadcasts in an area where the digital broadcasts are difficult to receive is provided. Applicable. In addition, the present invention is also applicable to a device that receives digital broadcasting including video in addition to audio.
[0048]
In addition, each of the above-described embodiments is merely an example of a specific embodiment for carrying out the present invention, and the technical scope of the present invention should not be interpreted in a limited manner. That is, the present invention can be embodied in various forms without departing from the spirit or main features thereof.
[0049]
【The invention's effect】
As described above, the present invention stores at least a part of the data displayed on the screen at the time of receiving a digital broadcast in a recording medium and, after switching from digital broadcasting to analog broadcasting, performs recording on the recording medium. Because the stored data is displayed on the screen, even if you enter an area where digital broadcasting is difficult to receive and switch from digital broadcasting to analog broadcasting, you can continue to display the minimum information. become able to.
[0050]
Further, according to another feature of the present invention, the mode of the screen display is changed between the time of receiving the digital broadcast and the time of receiving the analog broadcast. / Analog, and the user can intuitively recognize that the digital broadcast has been switched to the analog broadcast.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a digital broadcast receiving device according to an embodiment.
FIG. 2 is a diagram illustrating an example of a screen displayed on a monitor when switching from digital broadcasting to analog broadcasting.
FIG. 3 is a flowchart illustrating an example of an operation of the digital broadcast receiving device according to the present embodiment.
FIG. 4 is a flowchart illustrating another example of the operation of the digital broadcast receiving device according to the present embodiment.
FIG. 5 is a diagram showing an FM / AM spectrum by IBOC.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 antenna 2 tuner 3 demultiplexer 4 decoder 5 audio processing circuit 6 speaker 7 operation unit 8 system controller 9 display control circuit 10 monitor 11 memory

Claims (12)

In a digital broadcast receiving apparatus configured to receive digital broadcasting including music and accompanying data, and to switch to analog broadcasting in an area where reception of the digital broadcasting is difficult,
At least part of the data displayed on the screen at the time of receiving the digital broadcast is stored in a recording medium, and after switching from the digital broadcast to the analog broadcast is performed, the data is stored in the recording medium. A method for displaying at least a part of the data displayed on the screen at the time of receiving the digital broadcast based on the received data. The data that is continuously displayed after switching to the analog broadcast is data that does not change unless a user performs an explicit operation on the digital broadcast receiving device, and the data is displayed until the explicit operation is performed. 2. The digital broadcast screen display method according to claim 1, further comprising: The digital broadcast screen display method according to claim 2, wherein the data that is continuously displayed after switching to the analog broadcast is at least one of a broadcast station name and a broadcast station genre name. The data that is continuously displayed after switching to the analog broadcast is data that may change without a user's explicit operation on the digital broadcast receiving apparatus, and is accompanied by accompanying data included in the digital broadcast. 2. The digital broadcast screen display method according to claim 1, wherein control is performed such that the data is continuously displayed until a predetermined switching timing. The digital broadcast screen display method according to any one of claims 1 to 4, wherein a screen display mode is changed between when the digital broadcast is received and when the analog broadcast is received. 6. The digital broadcast screen display method according to claim 5, wherein a display color of a backlight is changed between when the digital broadcast is received and when the analog broadcast is received. 6. The digital broadcast screen display method according to claim 5, wherein a font of display characters is changed between when the digital broadcast is received and when the analog broadcast is received. 6. The digital broadcast screen display method according to claim 5, wherein a display of a received waveform is changed between when the digital broadcast is received and when the analog broadcast is received. A digital broadcast receiving device configured to receive digital broadcasting including music and accompanying data, and to switch to analog broadcasting to receive in an area where reception of the digital broadcasting is difficult,
Data storage means for storing at least a part of data included in the digital broadcast,
At the time of receiving the digital broadcast, a screen display is performed based on the data included in the received digital broadcast, and after switching to the analog broadcast, based on the data stored in the data storage unit. A digital broadcast receiving apparatus, comprising: display control means for controlling a screen display. The display control means controls the digital broadcast receiving apparatus to keep displaying data that does not change unless a user performs an explicit operation, from switching to the analog broadcast until the explicit operation is performed. The digital broadcast receiving apparatus according to claim 9, wherein: The display control means converts data that may be changed without a user's explicit operation on the digital broadcast receiving device from the switching to the analog broadcast by the accompanying data included in the digital broadcast in advance. The digital broadcast receiving apparatus according to claim 9, wherein the control is performed such that the display is continued until a predetermined switching timing. The display control means according to any one of claims 9 to 11, wherein the display control means further controls to change a screen display mode between the time of receiving the digital broadcast and the time of receiving the analog broadcast. Digital broadcast receiver.

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