JP4043398B2 - Digital broadcast receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digital broadcast receiver, and can be suitably used particularly for a digital broadcast receiver and an antenna adjustment method for notifying an adjuster of antenna adjustment and reception level confirmation.
[0002]
[Prior art]
In order to satisfactorily receive a television broadcast, a digital broadcast receiver equipped with a function for accurately setting an antenna in a predetermined direction is proposed in Patent Document 1 below.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-69092
[Problems to be solved by the invention]
However, if the entire system including the receiver, cable, antenna, etc. is in the best condition, only the installation of the antenna should be set in the optimal direction, but the cable is only an evaluation of the reception level of the system alone. If the reception level is not high enough if there is a defect in the antenna or part of the antenna, it will not be possible to make a relative evaluation of the reception level in the area. It may be over.
Therefore, even if the improvement can be expected by repairing the cable, the antenna, etc., the optimum countermeasure is not taken.
[0005]
The present invention was made in view of such a situation, totaling received signal strength data from a digital broadcast receiver installed in each home, obtaining an average reception level in the area, Using the actual reception level and this average reception level as a reference, viewers and antenna adjusters can prevent misadjustment when installing the antenna, and identify other causes of low reception levels and make effective use of them. The purpose is to be able to utilize.
[0006]
[Means for Solving the Problems]
The digital broadcast receiver according to the present invention includes at least a receiving unit, storage units 17, 18, and 19, an operating unit, and a CPU 10, and the CPU receives from the receiving unit in response to a control signal from the operating unit. The received signal strength for each station is detected, and the received signal strength is recorded in the storage unit 18 as digitized received level data.
[0007]
In addition, the digital broadcast receiver further includes communication units 14 and 15, and in response to a control signal from the operation unit, the CPU 10 stores the district code and the reception station-specific information from the storage units 17 and 18. The reception level data is acquired, the communication unit is activated, and the district code and the reception level data for each receiving station are transmitted to the aggregation center via the external communication network.
[0008]
In response to a control signal from the operation unit, the CPU 10 activates the communication units 14 and 15 to connect to the aggregation center via an external communication network, transmits the district code, and aggregates. Average reception level data for each receiving station corresponding to the district code is obtained from the center and recorded in the storage unit 19.
[0009]
Further, the digital broadcast receiver further includes an OSD display unit 7, and the CPU receives the district code and the reception from the storage units 17, 18, and 19 in response to a control signal from the operation unit. The reception level data for each station and the average reception level data for each area and each reception station are acquired, and these data are sent to the OSD display unit and displayed as numerical values or graphs, and / or Analysis was performed, and the result was sent to the OSD display unit and displayed in a message or the like.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described based on examples with reference to the drawings.
FIG. 1 is a functional block diagram showing an example of the configuration of a digital broadcast receiver according to the present invention.
1 is an antenna, 2 is a tuner unit, 3 is a demodulation circuit, 4 is an error correction unit, 5 is a transport decoder, 6 is an MPEG decoder, 7 is an OSD display unit, 8 is a video decoder, 9 is an audio DAC, and 10 is a CPU. , 11 is a FASHROM, 12 is a RAM, 13 is an input I / F, 14 is a Port, and 15 is a modem.
[0011]
A digital broadcast signal received by the antenna 1 is input to the tuner unit 2.
In the tuner unit 2, a predetermined channel is selected according to the instruction of the viewer, and the digital signal is corrected and corrected in the subsequent error correction unit 4, and is output from the error correction unit 4 in the subsequent transport decoder 5. Transport stream data is divided into audio signals, video signals, and data signals.
Further, the MPEG decoder 6 demodulates data of the video / audio signal, and the video encoder 8 demodulates the video signal suitable for the connected television receiver.
On the other hand, the audio DAC 9 demodulates the audio signal suitable for the television receiver or audio device connected.
[0012]
The CPU 10 controls the tuner selection or other digital broadcast receiver as a whole by a control signal sent from the input I / F 13 by a user operation.
The modem 15 is connected to a public line through a telephone line, and performs analog / digital data modulation / demodulation.
[0013]
FIG. 2 shows a process until acquisition of reception level data.
When acquiring the reception level data, the CPU 10 detects the magnitude of the antenna reception level of each Ch from the tuner unit by the control signal sent from the input I / F 13 according to the user instruction (step S21), and digitized reception level. As data, recording is performed in the reception level result database 18 for each Ch (step S22).
It is also possible to use a digital data error rate detected by the error correction unit 4 as an index of the antenna reception level.
[0014]
FIG. 3 shows a process for transmitting reception level data to the aggregation center.
When the reception level data is transmitted to the aggregation center, the CPU 10 obtains a district code (city code or postal code) from the district code database 17 by a control signal sent from the input I / F 13 according to a user instruction, and Ch. The reception level record data for each Ch is acquired from the reception level record database 18 (Step S31), the modem 15 is activated, and the acquired district code and reception level record data for each Ch are sent to the Port 14 via the external communication network. Then, the data is transmitted to the aggregation center (step S32).
[0015]
FIG. 4 shows a process for obtaining average reception level data from the aggregation center.
When the average reception level data of the area is acquired from the aggregation center, the CPU 10 activates the modem 15 according to the control signal sent from the input I / F 13 according to the user instruction, and goes to the aggregation center via the external communication network. And the district code (postal code, area code, etc.) is transferred (transmitted) (step S41).
[0016]
The aggregation center has a database of average reception levels for each Ch calculated for each district from the accumulation of reception level data sent from each household. When the district code is received from the receiver, The average reception level data for each Ch in the district that matches the code is transferred (transmitted) to the receiver (step S42).
The CPU 10 receives (acquires) the average reception level data for each Ch from the aggregation center via the external communication network through the modem 15 and the Port 14, and the average reception level database for each Ch in the FASHROM 11 of the receiver. 19 is recorded. (Step S43).
[0017]
FIG. 5 shows a process of displaying the reception level and the average reception level for each Ch in the area on the OSD display unit 7 of the digital broadcast receiver.
When notifying the viewer and the antenna adjuster of the reception level and the average reception level for each area of the area, the CPU 10 uses the control signals sent from the input I / F 13 according to the user instruction to cause the CPU 10 to store the databases 17 and 18 in the FASHROM 11. , 19 respectively, the district code, the reception data for each Ch level data, and the average reception level data for each Ch are acquired (step S51), and these data can be sent to the OSD display unit 7 to be interpreted by the viewer and the antenna adjuster. It is displayed as a numerical value or a graph (step S52). Moreover, the reception data for each Ch level and the average reception level data for each Ch are compared and analyzed, and the result is displayed on the OSD display unit with a message or the like in combination with the above display or independently, and the operator is notified. (See FIG. 6).
[0018]
FIG. 6 shows a display example of the OSD screen.
As shown in the figure, the average reception level for each Ch in the area and the actual reception level of the receiver are displayed in a graph, and for the sake of easy understanding for viewers and antenna adjusters, “ "The reception strength is high. You can enjoy watching with good image and sound."
If the reception strength is low, a message such as “The reception strength is slightly lower than the average in the same area. Check the antenna direction and cable connection status.” Is displayed.
[0019]
【The invention's effect】
According to the present invention, the following effects are brought about.
(1) Since the viewer and the antenna adjuster can know the actual reception level and the average reception level in the area, it is possible to prevent adjustment errors when the antenna is installed.
(2) It can be effectively used to identify the cause when the reception level is low.
(3) Since the reception level data from the digital broadcast receivers installed in each home is aggregated in the aggregation center, the statistics are very valuable data for the broadcasting station and relay station.
(3) Especially at the start of digital terrestrial broadcasting from 2003, new transmissions on new channels and existing stations stop for a while. It is assumed that it can be effectively used for adjustment of the transmission strength on the side.
[Brief description of the drawings]
FIG. 1 is a functional block diagram showing an example of a configuration of a digital broadcast receiver according to the present invention.
FIG. 2 is a diagram illustrating a process until acquisition of reception level data;
FIG. 3 is a diagram illustrating a process of transmitting reception level data to a counting center.
FIG. 4 is a diagram illustrating a process of obtaining average reception level data from a counting center.
FIG. 5 is a diagram showing a process for displaying the reception level and the average reception level for each Ch in the area on the OSD display unit;
FIG. 6 is a diagram illustrating a display example of an OSD screen.
[Explanation of symbols]
1 Antenna 2 Tuner 3 Demodulator 4 Error Correction 5 Transport Decoder 6 MPEG Decoder 7 OSD Display 8 Video Decoder 9 Audio DAC
10 CPU
11 FASHROM
12 RAM
13 Input I / F
14 Port
15 modem
16 System data 17 District code database 18 Reception level database for each Ch 19 Average reception level database for each Ch

Claims (2)

In a digital broadcast receiver having at least a reception unit, a storage unit, an operation unit, a communication unit, and a CPU,
In response to the control signal from the operation unit, the CPU detects the received signal strength for each receiving station from the receiving unit, and records the received signal strength in the storage unit as digitized reception level data. And
Obtaining the district code and the reception level data for each receiving station from the storage unit, starting the communication unit to the aggregation center via an external communication network, the district code and the reception level data for each receiving station Send
Activate the communication unit, connect to the aggregation center via an external communication network, transmit the district code, and obtain average reception level data for each receiving station that matches the district code from the aggregation center And recording in the storage unit ,
A digital broadcast receiver characterized by that. The digital broadcast receiver according to claim 1, further comprising an OSD display unit ,
In response to a control signal from the operation unit, wherein the CPU, from the storage unit, the district code and the locations distinguished by the receiving level data the receiving station obtains the average received level data by the receiving station, these The data is sent to the OSD display unit and displayed as a numerical value or graph, and / or the data is compared and analyzed, and the result is sent to the OSD display unit and displayed in a message or the like .
A digital broadcast receiver characterized by that.

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