JP3481114B2 - Digital 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 broadcast receiver, and more particularly to a digital broadcast receiver that receives, for example, broadcast data and auxiliary information data attached to the broadcast data.

[0002]

2. Description of the Related Art In a conventional digital broadcast receiver of this type, in order to reduce power consumption when a digital broadcast image is not displayed on a monitor (non-viewing mode), C
The power supply of the circuit (digital broadcast receiving section) necessary for receiving the digital broadcast such as the S tuner has been turned off. On the other hand, when displaying a video of a digital broadcast on the monitor (viewing mode), the PSI (Program Speci
EIT (Event Informatio) included in fic Information
n Table) etc. are imported.

[0003]

In this prior art, since the EIT and the like are started after the viewing of the digital broadcast program is started, the instruction for displaying the program guide or the program information is displayed immediately after the start of the viewing of the program. Is given, there is a problem that it takes time to display the program guide and program information. Also, when scrolling the program guide on the monitor to display on-screen the program guide data included in the broadcast data of other transponders,
It took time.

Therefore, a main object of the present invention is to provide a digital broadcast receiver which can reduce the time required for on-screen display.

[0005]

SUMMARY OF THE INVENTION The present invention provides a plurality of antennas.
Comprising a container, a digital broadcast receiver for selectively receiving auxiliary information data attached to <br/> broadcast data and broadcast data are transmitted separately from different broadcast stations, the receiver body non-viewing The non-viewing mode is discriminated by the mode discriminating means for discriminating whether the mode is the mode or not.
Select one of multiple antennas when
Receiving by one antenna selected by the means and the selecting means
Acquiring means for acquiring the attached information data, every predetermined time
Switching means for switching the selection of the selecting means to the
The annex information data acquired by the stage is used by multiple antennas.
It is a digital broadcast receiver including storage means for storing each of them individually .

[0006]

The digital broadcast receiver is provided with a mode discriminating means for discriminating the operation mode of the main body of the receiver. In the mode in which the video of the digital broadcast is not supplied to the monitor (non-viewing mode), the digital broadcast is received. Power is applied only to the necessary circuits, and the accessory information data attached to the broadcast data is detected. That is, the detecting means selects a specific transponder every first predetermined time and detects the attached information data. Further, the selection control means switches the selection means every second predetermined time, a specific antenna is selected, and attached information data attached to broadcast data from a plurality of broadcast stations is detected.

[0007]

According to the present invention, since the auxiliary information data is fetched even in the non-viewing mode, the time required for the on-screen display can be shortened immediately after the start of viewing the program. Further, since the attached information data attached to the broadcast data of a plurality of broadcast stations is taken in, the time required for on-screen display can be shortened even immediately after switching to the channels of other broadcast stations.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a digital broadcast receiver 10 of this embodiment includes antennas 12a and 12b. Antennas 12a and 12b are broadcast data from different broadcasting stations and auxiliary information data attached to the broadcast data. To receive. Here, the broadcast data refers to video data and audio data related to the video data, and the attached information data refers to program information necessary for displaying a program guide or a program description.

Broadcast data and auxiliary information data received by the antenna 12a or 12b are given to the CS tuner 14 via the antenna changeover switch SW1. The antenna changeover switch SW1 is changed over according to an instruction from the CPU 28. The CS tuner 14 selects broadcast data for 4 to 8 channels output from a desired transponder. In other words, in digital broadcasting,
Since the broadcasting data for 4 to 8 channels is output from one transponder, the CS tuner 14 selects a transponder including a desired channel from a plurality of transponders. The selected broadcast data is demodulated by the QPSK demodulation circuit 16 and becomes a transport stream composed of a plurality of transport packets for 4 to 8 channels.

The descrambler 18 descrambles the packet based on the contract information of the receiver and provides the transport packet to the demultiplexer (DEMUX) 20, which demultiplexes only the packet of the desired channel from the input packet. To detect. And the MPEG decoder 2
2 decodes the packet detected by the demultiplexer 20 and adds the decoded video data to the adder 4
Give to 0. The adder 40 also receives the on-screen display bitmap data output from the on-screen display IC 38. The adder 40 actually functions as a digital switch, and selects the output from the IC 38 only when the bitmap data is output from the IC 38. The output data from the adder 40 is converted into an NTSC format composite video signal by the NTSC encoder 24, and this composite video signal is output to the monitor 26.

PSI is included in a part of the transport packet.
Are assigned, and the PSI includes EIT and the like. Program information related to all broadcast channels (100 channels in this embodiment) is written to the EIT only for the program currently being broadcast (current program) and the program to be broadcast next to the current program (next program). Has been. CPU2
8 is an EP for 100 channels including the current channel × 9 hours from a plurality of transport packets with reference to the EIT.
G (Electronic Program Guide) data (program guide data) is extracted and DRAM is added together with other attached information data.
It is stored in 32. In this embodiment, the attached information data attached to the broadcast data received by the antenna 12a is DR
Stored in the memory area 32a provided in the AM 32,
The attached information data attached to the broadcast data received by the antenna 12b is stored in the memory area 32b of the DRAM 32.

The CPU 28 also uses the bitmap ROM 3
Generate the program guide bitmap data using 6,
The program guide bitmap data is expanded in the VRAM 34. The remote control transmitter 30 is configured as shown in FIG. 2, and when the operator presses the EPG button 30a, the IC 38 for on-screen display reads the program guide bitmap data from the VRAM 34 in response to the vertical synchronization signal (Vsync), It is given to the adder 40. In this example,
A program guide for 3 channels × 3 hours including the current channel is displayed on the monitor 26, and the cursor is moved to a desired program on the program guide by the cursor button 30d.
The program guide can be scrolled.

Further, an explanation button 3 of the remote control transmitter 30
When 0b is pressed, the CPU 28 causes the program guide to describe the program indicated by the cursor or the program currently being received,
That is, the program name, the broadcast start time, the broadcast end time, and the bitmap data of the program outline are expanded in the VRAM 34.
The IC 38 reads the program description bitmap data from the VRAM 34 according to the vertical synchronizing signal, and supplies it to the adder 40.

The digital broadcast receiver 10 further includes a power supply circuit 42, and the power supply circuit 42 is supplied with commercial power from an outlet 44. A main power switch SW2 is provided between the power circuit 42 and the outlet 44, and the main power switch SW2 is directly turned on or off by an operator. Therefore, when the main power switch SW2 is turned off, the power of all circuits of the digital broadcast receiver 10 is turned off.

On the other hand, when the main power switch SW2 is turned on, commercial power is applied to the power circuit 42, and the power circuit 42
Then, the commercial power supply is rectified and stepped down, supplied to the circuit (digital broadcast receiving unit) 10a necessary for receiving the digital broadcast, and supplied to the digital broadcast video, the program guide and the program explanation output circuit through the switch circuit 46. To be done. The switch circuit 46 is turned on / off in accordance with an instruction from the CPU 28, and the CPU 28 causes the remote controller transmitter 3 to operate.
The switch circuit 46 is controlled according to the instruction from 0.

For example, when the main power switch SW2 is turned on and all the switches of the switch circuit 46 are turned off, the CPU 28 detects a mode in which a digital broadcast program is not supplied to the monitor 26 (non-viewing mode). To be done. At this time, the power supply circuit 42 supplies power only to the digital broadcast receiving unit 10a, and the antenna 12
In a or 12b, broadcast data and attached information data are received. Therefore, the CPU 28 extracts the attached information data by referring to the EIT and stores it in the DRAM 32. In detail, when the non-viewing mode is detected,
The timers 48a and 48b are activated by the CPU 28. The CPU 28 controls the CS tuner 14 based on the time information of the timer 48a, and a specific transponder is selected. Further, the CPU 28 controls the switching of the antenna changeover switch SW1 based on the time information of the timer 48b. In this embodiment, the transponder selection is switched every 30 seconds, and the antenna switch SW
1 is switched every 10 minutes. Therefore, in the non-viewing mode, the attached information data attached to the broadcast data included in the plurality of transponders of the two broadcast stations is fetched, and the attached information data stored in the memory areas 32a and 32b of the DRAM 32 is updated.

In the non-viewing mode, the remote control transmitter 30
When the power button 30c is pressed, all the switches of the switch circuit 46 are turned on and the video of the last received channel is displayed on the monitor 26 (viewing mode). For example, when the EPG button 30a is pressed while watching a digital broadcast program received by the antenna 12a, the program guide data stored in the memory area 32a is read out and the monitor 26 receives the broadcast received by the antenna 12a. The program guide associated with the data is displayed. When the explanation button 30b is pressed, the program explanation data is read and the program explanation is displayed on the monitor 26.

If a channel included in another transponder is selected while watching a program of broadcast data received by the antenna 12a, the transponder including the selected channel is switched according to an instruction from the CPU 28. When the EPG button 30a is pressed immediately after the program of the selected channel is displayed on the monitor 26, the program guide data stored in the memory area 32a is read and the program guide is displayed on the monitor 26. Then, when the explanation button 30b is pressed, the program explanation data stored in the memory area 32a is read out and the program explanation is displayed on the monitor 26.

Further, when a channel of another broadcasting station is selected while watching a digital broadcast program received by the antenna 12a, the CPU 28 switches the antenna changeover switch SW1 to change the digital broadcast received by the antenna 12b. The program is displayed on the monitor 26. If the EPG button 30a is pressed immediately after this program is displayed, the program guide data stored in the memory area 32b is read and the program guide of the broadcasting station received by the antenna 12b is displayed on the monitor 26. Then, when the explanation button 30b is pressed, the program explanation data stored in the memory area 32b is read out, and the program explanation is displayed on the monitor 26.
Is displayed in.

The CPU 28 processes the above-described operation according to the flowcharts shown in FIGS. When the outlet 44 is inserted and the switch SW2 is turned on, the processing is started, and it is determined in step S1 whether the switch circuit 46 is turned on. Here, if “YES”, that is, if the viewing mode is detected, the program of the channel last watched last time is selected in step S3, the reception channel is encoded by the NTSC encoder 24 in step S5, and the processing is performed. finish. On the other hand, if "NO" in the step S1, that is, if the non-viewing mode is detected, a process of acquiring the attached information data is executed in a step S7, and the process returns to the step S1.

The process of acquiring the attached information data is executed according to the flow chart shown in FIG. That is, the processing is started when the non-viewing mode is set, and the timer 48a is started in step S11.
And 48b are started, and the auxiliary information data is extracted with reference to the EIT in step S13. Continued, step S
At 15, the extracted accessory information data is written in the RAM 32. The auxiliary information data related to the broadcast data received by the antenna 12a is written in the memory 32a,
The auxiliary information data related to the broadcast data received by the antenna 12b is written in the memory 32b. Step S
At 17, it is determined whether or not the count value of the timer 48a has passed 30 seconds, and if "NO", the process returns to step S13, but if "YES", the process switches to a specific transponder at step S19, and at step S21. Timer 4
Reset and start 8. And step S
At 23, it is determined whether the count value of the timer 48b has passed 10 minutes. Here, if “NO”, the process returns to step S13, but if “YES”, the step S13.
At 19, the antenna changeover switch SW1 is changed over. Then, in step S21, the timers 48a and 48b are reset, and the process returns to step S11.

Further, when any of the EPG button 30a, the explanation button 30b or the power button 30c provided on the remote control transmitter 30 is pressed, the CPU 28 starts the interruption operation, and as shown in FIG. 5, in step S31. E
It is determined whether the PG button 30a has been pressed. Here, if "YES", the program guide data is read from the DRAM 32 in step S33, and the process ends, but if "NO", the explanation button 3 in step S35.
It is determined whether 0b is pressed. Here, "YE
If "S", the program explanation data is read out in step S37, and the process ends, but if "NO", it is determined in step S39 whether or not the power button 30c is pressed. Here, "NO" If there is, the process returns to step S31, but if "YES", the process is ended by turning on or off the step S41 switch circuit 46. In step S41, the logical state of the switch circuit 46 is changed. Turned on or off.

Thus, even in the non-viewing mode, the additional information data related to the broadcast data is extracted from all the transponders and stored in the memory areas 32a and 32b, and the antenna changeover switch SW1 is provided between the antennas 12a and 12b. Since the switching is performed, it is possible to reduce the time required to display the additional information such as the program guide and the program description on the screen immediately after the channel of the different broadcasting station or the channel of the different transponder is selected.

In this embodiment, the additional information is as follows:
Although only the program guide and the program description have been described, the attached information also includes billing information and age restriction information. The billing information and age restriction information are information for displaying operation screens such as program purchase and viewing age restriction cancellation. Further, although the case where the monitor 26 is connected to the digital broadcast receiver 10 has been described in this embodiment, the present invention is also applicable to a television receiver integrally formed with the terrestrial broadcast tuner and / or the BS broadcast tuner. You can In this case, the auxiliary information data related to the broadcast data is acquired even while receiving the terrestrial broadcast or BS broadcast program (non-viewing mode of digital broadcast).

Further, in this embodiment, the broadcasting data and the additional information data of the digital broadcasting falling from the hygiene are received, but C received via the cable is used.
It goes without saying that it can be applied to ATV and the like.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an illustrative view showing a remote control transmitter of the embodiment in FIG.

FIG. 3 is a flowchart showing a part of the processing of the CPU of the embodiment in FIG.

FIG. 4 is a flowchart showing a part of the processing of the CPU of the embodiment in FIG.

FIG. 5 is a flowchart showing a part of the processing of the CPU of the embodiment in FIG.

[Explanation of symbols]

10… Digital broadcasting receiver 10a ... Digital broadcasting receiver 28 ... CPU 30 ... Remote control transmitter 32 ... DRAM 32a, 32b ... Memory area 36 ... Bitmap ROM 42 ... Power supply circuit 46 ... Switch circuit

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masako Wakisaka 2-5-5 Keihan Hon-dori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Hiroyuki Miyake 2--5-5 Keihan Hon-dori, Moriguchi City, Osaka Prefecture Sanyo Denki Co., Ltd. (72) Inventor Takayuki Kida 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Denki Co., Ltd. (56) Reference JP-A-9-275530 (JP, A) JP Hei 9-238289 (JP, A) JP 6-276453 (JP, A) JP 9-245467 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04N 5 / 38-5/46 H04N 7/08-7/081

Claims (2)

(57) [Claims] 1. A plurality of different broadcasts provided with a plurality of antennas
A digital broadcast receiver for selectively receiving auxiliary information data attached to the broadcast data and the broadcast data is transmitted separately from the station, the mode discriminating means receiver body to determine whether the non-viewing mode, the The non-viewing mode is discriminated by the mode discriminating means .
Selected, select one of the plurality of antennas
Selection means, and the one antenna selected by the selection means
Acquisition means for acquiring the attached information data, and a switching hand for switching the selection of the selection means at predetermined time intervals
And the auxiliary information data acquired by the acquisition means.
Storage means for individually storing a plurality of antennas ,
Digital broadcast receiver. 2. The broadcast data and the attached information data
Circuit components other than the circuit components required for receiving
Further includes a supply means for selectively supplying power to the component.
The mode determining means is powered by the supplying means.
The digital broadcast receiver according to claim 1, wherein the non-viewing mode is determined when the digital broadcasting receiver is not supplied .