JP3530464B2 - Digital / analog broadcast receiver - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital receiver capable of receiving both digital broadcasting and analog broadcasting.
The present invention relates to an analog broadcast receiving device.

[0002]

2. Description of the Related Art Video signals are recorded using digital signal compression technology.
There is digital broadcasting in which an audio signal is compressed and a stream (transport stream) in which video / audio digital signals of a plurality of programs are time-division multiplexed is broadcast via a transponder (satellite repeater). On the other hand, a broadcast receiving apparatus for receiving such a digital multi-channel broadcast selects one of a plurality of digital broadcast transponders received through a dedicated antenna by a tuner, and a plurality of channels included in the one transponder. One of them is selected by demultiplexing, and the video / audio signal is output by decoding the digital signal of the selected channel.

By the way, in such digital television broadcasting, in addition to transmitting video and audio as in conventional analog broadcasting, service information (program name, program details, program start time, program end time, etc.) is also transmitted. is doing. This service information is the E provided in the digital broadcasting receiver.
PG (Electronic Program Gui)
de) Since it is displayed as a program guide on the display by the screen display function, it is possible to efficiently select a program desired by the user from the multi-channel broadcasting.

Conventionally, among receiving devices for receiving analog television broadcasting, there is one called a two-screen television equipped with a two-screen synthesizing circuit for reducing and displaying two broadcast programs on one display. Are known.

[0005]

Therefore, it is conceivable that a video signal of digital television broadcasting can be supplied to the two-screen synthesizing circuit to perform two-screen display of the digital television broadcasting and the analog television broadcasting. On the other hand, it is desired that the EPG screen and the operation menu screen be displayed easily.

In view of the above-mentioned circumstances, the present invention makes it possible to display an analog television broadcast and a digital television broadcast on two screens, while ensuring the ease of viewing when displaying an EPG screen or an operation menu screen. -The purpose is to provide an analog broadcast receiving device.

[0007]

SUMMARY OF THE INVENTION
In order to solve the above problems, an analog broadcast receiving device is an on-screen display circuit provided in an output system of a video signal by digital broadcast in a digital / analog broadcast receiving device that receives both digital broadcast and analog broadcast. An electronic program guide display means for displaying program information on the screen using the on-screen display circuit based on service information included in digital broadcasting, a two-screen display instruction button operated by a user, and a two-screen display instruction A two-screen combining circuit that performs a video reduction process so as to display two broadcasts including a digital broadcast when the button is operated, and the two-screen display instruction button is operated while the program information is displayed. Is a control unit for performing control for invalidating the two-screen display instruction,
It is characterized by having.

With the above arrangement, the two-screen synthesizing circuit displays two broadcasts including a digital broadcast on two screens. That is, both digital and analog television programs can be watched at the same time. Here, if the image of the program information generated in the output system of the image by digital broadcasting is displayed on the two screens by the two-screen synthesizing circuit, the program information is displayed in a small size and is difficult to see. In the above configuration, since the two-screen display is not performed even when the two-screen display instruction button is operated when the program information is displayed, the program information is maintained in the size of the entire screen,
The legibility can be secured.

The digital / analog broadcast receiving apparatus of the present invention is a digital / analog broadcast receiving apparatus for receiving both digital broadcast and analog broadcast,
An on-screen display circuit provided in a video signal output system for digital broadcasting, an operation menu display means for displaying an operation menu on the screen using the on-screen display circuit, and a two-screen display instruction operated by a user. A button and a two-screen synthesizing circuit that performs a video reduction process so as to display two broadcasts including a digital broadcast when the two-screen display instruction button is operated.
And a control means for performing control for invalidating the two-screen display instruction when the two-screen display instruction button is operated while the operation menu is displayed.

With the above-mentioned structure, the two screens including the digital broadcast are displayed on the two screens by the two-screen synthesizing circuit. That is, both digital and analog television programs can be watched at the same time. Here, if the image of the operation menu generated in the output system of the image by digital broadcasting is displayed on the two screens by the two-screen synthesizing circuit, the operation menu is displayed in a small size, which is difficult to see. In the above configuration, even when the dual screen display instruction button is operated while the operation menu is displayed,
Since the screen is not displayed, the operation menu is maintained in the size of the entire screen, and the legibility can be ensured.

The digital / analog broadcast receiving apparatus of the present invention is a digital / analog broadcast receiving apparatus for receiving both digital broadcast and analog broadcast,
An on-screen display circuit provided in an output system of a video signal by digital broadcasting, and an electronic program guide display means for displaying program information on the screen using the on-screen display circuit based on service information included in the digital broadcasting. , 2 including an electronic program guide display instruction button which is in the user thus operating, the digital broadcast
Two-screen synthesizing circuit for performing video reduction processing so as to display one broadcast, and control for displaying program information in one-screen display when the electronic program guide display instruction button is operated during two-screen display Means and are provided.

With the above-mentioned structure, the two-screen synthesizing circuit displays two screens of two broadcasts including a digital broadcast. That is, both digital and analog television programs can be watched at the same time. Where 2
If the program information is instructed to be output while the screen display is being performed and the program information is displayed on the screen in the two-screen display, the program information is displayed in a small size and is difficult to see. In the above configuration, when the electronic program guide display instruction button is operated even when performing the dual-screen display, the program information is displayed in the single-screen display, so the program information has the size of the entire screen and is easy to view. can do.

The digital / analog broadcast receiving apparatus of the present invention is a digital / analog broadcast receiving apparatus for receiving both digital broadcast and analog broadcast,
And on-screen display circuit provided in the output system of the video signal by the digital broadcasting, an operation menu display means for displaying an operation menu on the screen by using the on-screen display circuit, the operation menu display is user thus operating Image reduction processing to display two broadcasts including the instruction button and digital broadcast 2
A screen synthesizing circuit and a control means for switching to the single screen display and displaying only the operation menu when the operation menu display instruction button is operated during the dual screen display are provided.

With the above-mentioned structure, the two screens including the digital broadcast are displayed on the two screens by the two-screen combining circuit. That is, both digital and analog television programs can be watched at the same time. Where 2
If the operation menu is instructed to be output while the screen is being displayed, and the operation menu is displayed on the screen in the two-screen display mode, the operation menu is displayed in a small size.
It becomes difficult to see. In the above configuration, when the operation menu display instruction button is operated even when the two-screen display is being performed, the operation menu is displayed in the one-screen display, so that the operation menu has the size of the entire screen and the legibility is ensured. be able to.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
Although description will be made based on FIG. 3, here, the user performs BS (Broadcasting v) as digital broadcasting.
ia Satellite) The case of viewing a digital broadcast is illustrated.

FIG. 1 is a block diagram showing a broadcast receiver 30 of this embodiment in which a user can arbitrarily watch BS digital broadcasting, BS analog broadcasting, and terrestrial broadcasting.

The parabolic antenna 1 is arranged outdoors in a predetermined direction and receives a digital broadcast signal and an analog broadcast signal sent from the BS.
The parabolic antenna 1 is generally provided with a frequency converter, and gives a received / frequency-converted signal to the tuners 2.3. Further, the terrestrial antenna receives terrestrial broadcasting and gives a received signal to the terrestrial tuner 4.

The BS digital tuner 2 extracts a signal of a specific frequency from the high frequency digital modulated signal containing video / audio data. That is, a process of selecting one from a plurality of transponders for digital broadcasting is performed. Further, the BS digital tuner 2 is equipped with an inverse interleave circuit, an error correction circuit, a demodulation circuit, etc. to demodulate the selected digital modulation signal and output a transport stream.

The demultiplexer (DEMUX) 6 is B
The transport stream received from the S digital tuner 2 is converted into MPEG2 (Moving Pict).
ure Experts Group 2) video transport packets, audio transport packets, and PSI (Program Specific I)
nformation). The demultiplexer 6 supplies the video transport packet and the audio transport packet to the AV decoder 7, and the PSI
The service information included in is supplied to the system controller 18. As described above, a plurality of channels are multiplexed in the transport stream, and the process for selecting an arbitrary channel from these is performed by selecting which channel in the transport stream from the PSI. This can be done by extracting the data such as whether the packet ID is multiplexed. Furthermore, selection of transport stream (selection of transponder)
Can also be retrieved from the PSI.

The AV decoder 7 includes a video decoder for decoding video transport packets and an audio decoder for decoding audio transport packets. Video decoder
The input variable length code is decoded to obtain a quantized coefficient and a motion vector, and inverse DCT conversion and motion compensation control based on the motion vector are performed. The audio decoder decodes the input coded signal to generate audio data. The video data generated by decoding is output to the video processing circuit 8, and the audio data is output to the audio processing circuit 9.

The video processing circuit 8 receives the video data from the AV decoder 7 and performs D / A conversion to generate a video signal. The audio signal processing circuit 9 receives the audio data output from the AV decoder 7 and performs D / A conversion to generate an analog audio signal.

The BS analog tuner 3 performs a channel selection process for selecting a signal of a frequency corresponding to the channel selected by the user and a demodulation process for FM demodulating the signal of the selected frequency. Similarly, the terrestrial tuner 4 performs a tuning process for selecting a signal having a frequency corresponding to the channel selected by the user.

The video processing section 5 includes a BS analog tuner 3
The received signal supplied from the receiver and the received signal supplied from the terrestrial tuner 4 are demodulated to generate a video signal. In addition,
The description of the processing of the audio signal is omitted. Further, the video processing unit 5 has a two-screen synthesis processing function. The two-screen combination is not limited to the combination of the terrestrial broadcast and the BS analog broadcast, and the BS digital broadcast can be one of the two screens. That is, the video signal based on the BS digital broadcasting is supplied to the video processing unit 5 through the signal supply line 22, and the video processing unit 5 performs the video reduction process to display the video for two broadcasts on the screen. Is generated. The switching process between the two-screen display and the one-screen display and the image selection process are based on the operation of the remote controller by the user.
It is executed by a command from the system controller 18.

The OSD (on-screen display) circuit 13 is provided in a signal processing system for analog broadcasting, and outputs bit map data based on character information instructed to output from the system controller 18 to the adder 14. The adder 14 incorporates the video signal based on the bitmap data into the video signal output from the video processing unit 5, and supplies the video signal to the drive circuit 10.

The OSD (on-screen display) circuit 15 is provided in a digital broadcast signal processing system, and outputs bit map data based on character information instructed to be output from the system controller 18 to the adder 16. The adder 16 incorporates the video signal based on the bitmap data into the video signal output from the video processing circuit 8 and supplies the video signal to the drive circuit 10. The OSD circuit 15 causes the system controller 18 to receive an EPG (Electronic Program) based on the service information included in the PSI.
m Guide) screen display (display of program guide, program details, etc.) is realized, and display of an operation menu screen related to digital video is also realized. It should be noted that when displaying the EPG screen or the operation menu screen, the received video is not displayed in the background.

The picture tube 11 displays an image by the image signals (R, G, B signals and vertical / horizontal synchronizing signals) supplied from the drive circuit 10. Further, the speaker 12 outputs a sound based on the sound signal output from the sound processing circuit 9.

The switch 17 drives the video signal (BS digital broadcast video) from the video processing circuit 8 into the drive circuit 10.
Or to the video processing unit (two-screen combination) 5. This switching is performed based on a command from the system controller 18. The details of this command will be described later.

The remote control transmitter 19 is the broadcast receiver 3 concerned.
It is a transmitter for sending a command to 0. When a key (not shown) provided on the remote control transmitter 19 is operated,
A signal light (remote control signal) indicating a command corresponding to the key is sent from a light emitting unit (not shown). The remote control light receiver 20 receives the signal light, converts it into an electric signal, and gives it to the system controller 18.

The system controller 18 is a controller compatible with both the analog broadcast receiving function and the digital broadcast receiving function, and performs program selection processing by the user using the remote control transmitter 19 or the like. Further, the system controller 18 stores the information (program information etc.) separated by the demultiplexer 3 in the memory 2.
1 and the switching control of the switch 17.

The switch 17 is connected to the contact 17a for supplying the video signal of the BS digital broadcast to the drive circuit 10 in the normal received video display in the BS digital broadcast. Further, the above-mentioned E by the OSD circuit 15
Even when the PG screen display or the operation menu screen display is executed, the video signal for the screen display is connected to the contact 17a in order to supply the drive circuit 10. on the other hand,
When the user operates the two-screen switching button of the remote control transmitter 19, the switch 17 is connected to the contact 17b so as to supply the received image of the BS digital broadcast to the image processing unit (two-screen combination) 5.

However, the switch 17 is not connected to the contact 17b even if the dual screen switching button is operated during execution of the EPG screen display or the operation menu screen display. Further, when the EPG screen display command button or the operation menu screen display command button is pressed during the dual screen display in which the BS digital broadcasting is one of the two screens, the system controller 18 connects to the contact point 17b. By connecting the switch 17 to the contact 17a, the video signal is not supplied to the video processing unit (two-screen combining unit) 5, and the OSD circuit 15 is caused to display the EPG screen and the operation menu screen in full screen. Issue a command.

Display control by switching the switch 17 will be described with reference to the flowchart of FIG.
First, it is determined whether or not a two-screen display instruction has been issued (step S1). When a command to display two screens is issued, it is judged whether or not the current display is in the state of EPG display or operation menu display (step S2), and in the case of NO (when one screen of received video is displayed, etc.). Executes the two-screen display as instructed (step S3). On the other hand, Y
In the case of ES, the single screen display (EPG display state or operation menu display state) is maintained without executing the two-screen display (step S4).

That is, in such display control, as shown in FIG. 2B, when a two-screen switching command is issued while the received video is being displayed, the screen is switched to the two-screen display as instructed, but the EPG display or operation is performed. In the state of the menu display, even if a two-screen switching command is issued, this command is treated as invalid and the screen is not switched to the two screens.

Another display control by switching the switch 17 will be described with reference to the flowchart of FIG. First, it is determined whether the command button displayed on the EPG or the command button displayed on the operation menu is operated (step S5). If the button is operated, it is determined whether or not the current display is a two-screen display (step S6). If it is in the two-screen display mode, the switch 17 is connected to the contact 17a to switch to the one-screen display (step S
7) The OSD circuit 15 is instructed to display the EPG screen or the operation menu screen (step S8). on the other hand,
If it is not in the two-screen display state, the switch 17 is the contact 17
Since it is connected to a, the OSD circuit 15 is directly instructed to display the EPG screen or the operation menu screen (step S8).

That is, in such display control, as shown in FIG. 3B, when a display command for the EPG screen or the operation menu screen is issued during the dual screen display, the EPG screen or the operation menu screen is displayed on the entire screen. The EPG screen or the operation menu screen and the received image are displayed on the screen.
It is not divided and displayed.

[0036]

As described above, according to the present invention, when the program information or the operation menu is displayed,
Even if the screen display instruction button is operated, the two-screen display is not executed, so that the program information and the operation menu are maintained in the size of the entire screen, and the legibility can be secured. Also, 2
Even when the screen is displayed, when the electronic program guide output instruction or the operation menu output instruction is given, the program information and the operation menu are output in a single screen display, so the program information and the operation menu are the size of the entire screen, The legibility can be secured.

[Brief description of drawings]

FIG. 1 is a block diagram showing a broadcast receiver according to an embodiment of the present invention.

2A and 2B are diagrams showing an embodiment of the present invention, in which FIG. 2A is a flowchart showing the contents of display processing control, and FIG. 2B is an explanatory diagram of display processing control.

FIG. 3 is a diagram showing an embodiment of the present invention, in which FIG. 3A is a flowchart showing the contents of display processing control, and FIG. 3B is an explanatory diagram of display processing control.

[Explanation of symbols]

1 parabolic antenna 2 BS digital tuner 3 BS analog tuner 4 Terrestrial tuner 5 Video processing unit (two-screen synthesis) 6 Demultiplexer (DEMUX) 7 AV decoder 8 Video processing circuit 6 Voice processing circuit 13 OSD circuit 14 adder 15 OSD circuit 16 adder 17 switch 17a contact 17b contact 18 system controller

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 5/38-5/46 H04B 1/16

Claims (4)

(57) [Claims] 1. A digital / analog broadcast receiving apparatus for receiving both digital broadcast and analog broadcast,
An on-screen display circuit provided in an output system of a video signal by digital broadcasting, and an electronic program guide display means for displaying program information on the screen using the on-screen display circuit based on service information included in the digital broadcasting. , Operated by the user 2
A screen display instruction button, a two-screen synthesizing circuit that performs a video reduction process so as to display two broadcasts including a digital broadcast when the two-screen display instruction button is operated, and the above-mentioned when the program information is displayed. A digital / analog broadcast receiving apparatus comprising: a control unit that performs control to invalidate a two-screen display instruction when a two-screen display instruction button is operated. 2. A digital / analog broadcast receiving apparatus for receiving both digital broadcast and analog broadcast,
An on-screen display circuit provided in a video signal output system for digital broadcasting, an operation menu display means for displaying an operation menu on the screen using the on-screen display circuit, and a two-screen display instruction operated by a user. A button and a two-screen synthesizing circuit that performs a video reduction process so as to display two broadcasts including a digital broadcast when the two-screen display instruction button is operated.
A digital / analog broadcast receiving apparatus comprising: a control unit that performs control to invalidate the two-screen display instruction when the two-screen display instruction button is operated while the operation menu is displayed. . 3. A digital / analog broadcast receiving apparatus for receiving both digital broadcast and analog broadcast,
An on-screen display circuit provided in an output system of a video signal by digital broadcasting, and an electronic program guide display means for displaying program information on the screen using the on-screen display circuit based on service information included in the digital broadcasting. , 2 including an electronic program guide display instruction button which is in the user thus operating, the digital broadcast
Two-screen synthesizing circuit for performing video reduction processing so as to display one broadcast, and control for displaying program information in one-screen display when the electronic program guide display instruction button is operated during two-screen display A digital / analog broadcast receiving apparatus comprising: 4. A digital / analog broadcast receiving apparatus for receiving both digital broadcast and analog broadcast,
And on-screen display circuit provided in the output system of the video signal by the digital broadcasting, an operation menu display means for displaying an operation menu on the screen by using the on-screen display circuit, the operation menu display is user thus operating Image reduction processing to display two broadcasts including the instruction button and digital broadcast 2
A digital circuit comprising: a screen synthesizing circuit; and control means for switching to the single screen display and displaying only the operation menu when the operation menu display instruction button is operated during the dual screen display. -Analog broadcast receiver.