JP2000049720A - Diagnostic system for digital broadcasting reception conditions - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reception condition diagnostic system capable of easily, quickly, accurately and multilaterally diagnosing the reception condition of a digital broadcasting receiver. SOLUTION: This system is provided with a reception state decision means D2 for deciding the reception state of digital broadcasting radio waves, based on the respective states of plural parameter signals detected from the reception signals of the digital broadcasting radio waves, a reception diagnostic means D3 for diagnosing the reception condition of the digital broadcasting radio waves, based on the decided result of the reception state decision means D2 and a display means D4 for displaying a diagnosed result by the reception diagnostic means D3, and thus, the reception condition of the digital broadcasting radio waves is diagnosed multilaterally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for diagnosing a digital broadcast reception situation, which diagnoses a poor reception situation of a broadcast wave in a digital broadcast receiving apparatus and displays a result of the diagnosis.

[0002]

2. Description of the Related Art FIG. 4 (block diagram) shows a conventional system for diagnosing a digital broadcast reception situation. The system for diagnosing a digital broadcast reception situation receives a signal from a reception antenna A for receiving a digital broadcast wave. signal strength detecting means D ₁₁ for detecting the field strength of the received signal in the reception signal processing apparatus B to the signal processing receives a _signal, the broadcast wave based on the electric field strength of the received signal detected by the signal intensity detecting means D ₁₁ Receiving state determining means D for determining the receiving state
₂ , a receiving diagnostic means D ₃ for diagnosing the reception status of the broadcast radio wave based on the determination result by the receiving state determining means D ₂ , and a display means D ₄ for displaying the diagnostic result by the receiving diagnostic means D _3. ing. Incidentally, the channel selection apparatus C is a channel selection apparatus having an operation means such as the operation button in a general digital broadcast receiver, in this reception status diagnostic system, the determination result is "received by the reception status determining means D ₂ "Situation / defective", that is, when it is determined that the electric field strength of the received signal is insufficient, the user operates the operation means such as the operation button to select another broadcast station, and the broadcast radio wave of the other broadcast station is selected. This is for diagnosing the reception status.

[0003] The basic operation of the conventional system for diagnosing the reception of digital broadcasting as described above will be described with reference to FIG. First, the electric field strength of received by the reception antenna A receiving signal processing device B by a signal processed received signal is detected by the signal intensity detecting means D ₁₁ (step S51), the reception state based on the detection signal level ( whether or not the signal strength) is good is judged by the reception status determining means D ₂ (step S52). Receiving state judgment means D ₂ by the determination result: If "YES is good", the signal intensity detecting step (step S
51), and returns to the signal strength detecting step (step S5).
1) and repeated the signal intensity determination step (loop consisting of steps S52), the determination result by the reception status determining means D ₂ is "NO: not good" sometimes, other stations by operating the channel selection apparatus C by the user A channel is selected (step S53).

[0004] Another broadcast station is selected (step S5).
And 3), the electric field strength of the received signal of the broadcast radio wave tuned is detected by the signal intensity detecting unit D _11, the reception state determining means D _2, whether the reception state (signal intensity) is good Is determined (step S54). If the result of the determination is "YES: good", the reception diagnosis means D determines that the broadcast station which has been diagnosed as "NO: not good" in the previous determination (step S52) has a cause of poor reception status.
₃ and the diagnosis result is displayed (step S56). If the determination result is "NO: not good",
A diagnosis result of "reception status / bad" is displayed (step S55). Incidentally, the cause of "receiving state or defective" displayed by the display unit D ₄ is diagnosed by the receiving diagnostic means D ₃ is a digital broadcast itself, weather conditions, the antenna or electric field intensity of the broadcast wave by satellite diet such as, It is due to insufficiency.

[0005]

As described above, in the conventional digital broadcast reception status diagnosis system, the content of the reception diagnosis result is simply a problem on the broadcast station side or a problem on the electric field strength of the broadcast radio wave. Therefore, there is a problem that the true cause of the poor reception situation cannot be determined and appropriate measures cannot be taken. In addition, since the user must operate the tuning device C, there is a problem that it takes time and troublesome to diagnose the reception status. Conventionally, as a diagnostic system of this kind of digital broadcast receiving situation, a diagnostic system that measures and diagnoses a LOCK signal and an error rate peculiar to a digital broadcast receiving device, and indirectly determines an electric field strength of a broadcast radio wave from an AGC signal level. Diagnosis systems that measure and diagnose based on the result of error correction processing are also known. However, in a diagnostic system that measures and diagnoses a LOCK signal or an error rate, a diagnosis is performed to the extent that the reception status is good or bad. Yes, it does not diagnose by judging many other factors. It also diagnoses by indirectly measuring the electric field strength of broadcast radio waves from the AGC signal level, and diagnoses from error correction processing results. Are all simple diagnostics, and have problems such as the inability to make a quick and accurate diagnosis.

As described above, all of the conventional digital broadcast reception status diagnosis systems are diagnosis systems that individually use the respective parameter reception information, so that the user can only diagnose whether the reception status of the broadcast radio wave is good or bad. You don't know and can guess what caused the bad reception,
There is a problem that such measures cannot be taken. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to obtain a digital broadcast reception status diagnosis system that enables a user to easily, quickly, and accurately diagnose a broadcast radio reception status. Is what you do.

[0007]

A first aspect of the present invention is a determination parameter signal detecting means for detecting a plurality of types of parameter signals from a received signal of a digital broadcast wave, and receiving each of the detected plurality of types of parameter signals. Reception state determination means for determining a state, reception diagnosis means for diagnosing the reception status of the digital broadcast radio wave based on the determination result of the reception state determination means, display means for displaying a diagnosis result by the reception diagnosis means, It is characterized by having.

According to a second aspect of the present invention, in the diagnostic system for digital broadcast reception status according to the first aspect, there is provided a channel selecting means for selecting another broadcast station in accordance with a result of the determination by the receiving state determining means. It is characterized by.

According to a third aspect of the present invention, in the digital broadcast reception status diagnosing system according to the first or second aspect, the reception state determining means comprises a plurality of types of parameter determining means of the following (1) to (4). It is characterized by having been done. (1) Equalizer operating environment determining means (2) LOCK signal determining means (3) Received signal electric field strength determining means (4) Error rate determining means

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, digital broadcast reception according to the present invention will be described.
An embodiment of a situation diagnosis system will be described with reference to FIGS.
I will explain. FIG. 1 is a digital broadcast reception situation of the present invention.
This shows the diagnostic system of the
The system is a receiving antenna that receives digital broadcast waves
In the reception processing device B that processes the received signal from A
Determination parameter signal for detecting a plurality of parameter signals
Detecting means D₁(Signal strength detecting means D₁₁, LOCK signal
Detecting means D₁₂Error number detecting means D₁₃, And Ikora
Isa operating environment detecting means D ₁₄Composed of
Constant parameter signal detection means D₁Multiple parameters detected in
Data signal reception status judgment
Means D₂, Receiving state determining means D₂Based on the judgment result by
To determine whether the reception status of broadcast radio waves is good or not.
Diagnostic means D for instructing countermeasures against₃, And reception diagnostic means
D₃Display means D for displaying the diagnosis results and the countermeasures thereof₄
It is composed of Note that the channel selection means D_FifteenIs received
The reception state determination means D of the situation diagnosis system ₂Judgment
When the result is "Reception status / bad", other
This is a channel selecting means for selecting a broadcasting station.

The operation of the system for diagnosing the reception status of digital broadcasting according to the present invention will be described with reference to FIG. 2 (flow chart). First, after channel selection (the step S20) on any broadcasting station, from the received signals processed by the reception signal processing apparatus B, LOCK signal detector D ₁₂
The presence or absence of the detected LOCK signal is determined (step S21), and the determination result is “YES: LOCK”.
If the signal present ", then, is detected number of errors in the received signal by the error number detecting means D _{1 3,} the error rate is determined by the reception state determining means D ₂ (step S22).
Then, the determination is an error rate determination step (Step S22): When "YES error (error) is small", where the received diagnostic means D ₃ "reception status is good" diagnosed with display means D4 "Reception status / good" is displayed (step S23). On the other hand, when the result of the error rate determination step (step S22) is “NO:
If there are many errors ", the reception diagnostic means D
₃ is diagnosed as "bit error is large" by changing the display unit D _4, the reception status "bit error is large,""Check Connection to the antenna direction" indication to the user, the "Equalizer environment REF mode ( However, when there is no ghost) "is displayed (step S28).

In the LOCK signal determination step (step S21), "NO: no LOCK signal"
"LOC when it is determined, due receiving diagnostic means D ₃ and
Diagnosed with K no signal ", the display unit D _4, the reception status" no LOCK signal "indication to the user" confirmation of the connection between the antenna direction "is displayed (step S24)
At the same time, the reception state determining means D _2, although the electric field strength of the received signal of a broadcast wave is insufficient or sufficient is determined (step S25). Then, the display step S2
At 4, the user confirms the direction and connection of the antenna, and the signal strength determination step (Step S
If the determination result of step 25) is “YES: sufficient”, the next equalizer tap coefficient determination step (step S
In 26) from the tap coefficients detected by the equalizer operating environment detection unit D _14, the presence or absence of ghosts, and noise magnitude is determined, the determination result is "YE
S: When the ghost is determined that no noise is small "is" reception status by receiving diagnostic means D ₃ is good "
By the diagnosis display unit D ₄ displays "receiving status-good" (step S27), and also the determination is "NO:
Ghost and noise is large "
By receiving diagnostic means D ₃ "reception status is not good" and "receiving status-poor" by the display unit D ₄ diagnosed with, the cause "There are a large noise ghost" is displayed (step S30).

Meanwhile, the determination result in said received signal strength determination step in the reception state determining means D ₂ (step S25) is: If "NO insufficient", the received diagnostic means D
By _3, it was diagnosed as "reception situation is not good", "reconfirmation antenna direction, recommend the booster use" indication to the user as a "receiving state-poor" by the display unit D ₄ is displayed (step S31) . Also, the error rate determination step in the reception state determining means D ₂ (step S
At 22): "check such as connection to the antenna direction" is determined as "NO error is large" and "bit error is often" by the display unit D _4, an instruction to the user, change the "Equalizer environment REF mode (However, when there is no ghost) "is displayed (step S28), the user performs" confirmation of antenna direction and connection ", and then changes the equalizer environment operation to" REF mode "(step S29). ), And the error rate determination step (step S22) is executed again.

Furthermore, the determination result of the signal intensity determination step in the reception state determining means D ₂ (step S25) is: a "NO insufficient", "reception situation is not good"
Diagnosed with, if displayed as "receiving status-poor" (step S31) automatically, another broadcast station by tuning means D ₁₅ is tuned (step S32), again, it has been tuned The same operation of the reception status diagnosis system is performed on the broadcast wave from the broadcast station, and the reception status of the broadcast wave is diagnosed. By this reception status diagnosis, it is possible to quickly and accurately determine whether or not there is a cause of the reception status failure on the side of the broadcast station determined as “reception status / bad” by the previous broadcast radio wave reception status diagnosis. .

As described above, this system for diagnosing the reception status of digital broadcast radio waves starts from the execution of the channel selection step (step S20), and the four parameter signal determination steps (S21, S21) for the selected broadcast radio waves.
22, S25, S26), the reception status is diagnosed, and the operation is completed by executing the diagnosis result / measure display step (S21, S22, S25, S26). Incidentally, according to the channel selection means D ₁₅ "other stations, station selection step (step S32)" is are intended to be performed automatically, by a manual operation means such as a channel selection button, the user, as appropriate, It can also be executed. A display means D for displaying the diagnosis result and its countermeasure;
Reference numeral ₄ may be a notification unit that notifies the user by sound or vibration from a speaker or the like.

[0016] An example of a method of determining the parameters at the receiving state judgment means D _2. (1) Judgment of error rate The number of packet errors in 20 seconds is detected, and the error rate is calculated from the number of errors to make a judgment. (2) Judgment of noise and ghost An equalizer operating environment is detected, and a judgment is made by estimating the operating environment. a. Noise status Out of the 256 tap coefficients of the equalizer, the 200th and subsequent taps are hardly functioning and contain dust values. Since this value is proportional to the noise level, Estimate the noise situation and make a decision. b. Presence or absence of ghost In the tap coefficients of the equalizer, there is a main tap whose value is about 1100.
Since the presence of the tap coefficient is due to the ghost component, the presence or absence of the ghost is estimated from the presence or absence of the tap coefficient to make the determination. (3) Judgment of LOCK and UNLOCK Judgment is made based on the presence or absence of a LOCK signal. (4) Judgment of Received Signal Electric Field Strength (See FIG. 3) Based on the AGC signal level output from the VSB module 32 and input to the high frequency amplifier of the tuner 31, the reception RF signal of the digital broadcast wave is determined. The electric field strength is estimated, and the comparison is made by the comparison circuit 33 with the reference electric field strength. In double conversion tuner, RF
There are two types of AGC voltage, AGC and IF AGC,
Each has different characteristics. In this case, the electric field strength can be estimated over a wide range by observing a signal obtained by combining the two AGC signals.

Table 1 shows the results of the determination of the reception states of the above four determination parameter signals, the reception status of the broadcast radio wave diagnosed from the results of the determination, and information on the countermeasures.

[0018]

[Table 1]

The definitions of the diagnosis results in Table 1 are roughly as follows, and the reception status during normal reception is confirmed in advance (for example,
○ mark) to advance, the reception state determining means _{D 2} of the diagnostic system of the digital broadcasting reception status the reception status (○ mark) (Fig. 1, each parameter signal determining step in the reference) (Fig. 2, S21, S22, S25 , S26). That is, the highest reception status (indicated by a circle) of the digital broadcast receiving apparatus is used as a criterion for “reception status / good” in each parameter signal determination step.

"Definition of diagnosis results in Table 1" (circle mark: reception status at normal time) (1) Reception status (a) Good (no problem). ○ (b) Normal (although there are some errors, broadcasting can be enjoyed). (C) Bad (image is disturbed). (2) Noise situation ○ (a) Good. (B) Bad. (3) Ghost situation (a) None. （(B) Yes, but removed. (C) Cannot be removed. (4) Electric field strength (a) Strong. ○ (b) Normal. (C) Weak. (D) It is too weak and has many errors.

As described above, the reception status of the digital broadcast receiving apparatus at the time of normal reception is, for example, as described in (1)-
(B), (2)-(a), (3)-(b), (4)-
As (b), when used as a criterion for each parameter signal determining step in the receiving state judgment means D ₂ of the reception status diagnostic system, now receiving condition of the broadcast radio waves is changed, the electric field strength of the received signal is normal becomes weaker than during reception, the signal intensity determination means in the receiving state judgment means D ₂ of the reception status diagnostic system (signal intensity determination step S25) is determined as "field strength and poor" (NO), receives the diagnostic means D ₃ It is diagnosed as "receiving status-poor" by, displayed by the display unit D ₄ (step S
31) Note that the reception status of the digital broadcast receiving apparatus at the time of normal reception (indicated by a circle, for example, (1)-
(B), (2)-(a), (3)-(b), (4)-
(B)) is preferably stored in a memory so that the user can check and change it at any time.

[0022]

As described above, according to the system for diagnosing the reception status of a digital broadcast according to the present invention, a multifaceted diagnosis of the reception status including a decrease in the electric field strength of the reception signal of the broadcast radio wave can be performed. Diagnosis by the user can be performed easily, quickly and accurately, and the countermeasures can be accurately grasped and executed. In addition, it is also possible to determine whether there is a cause of poor reception status on the broadcast station side by selecting another broadcast station when it is diagnosed as "reception status / poor" by providing a channel selection means It can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a digital broadcast reception status diagnosis system according to an embodiment of the present invention.

FIG. 2 is an operation flowchart of a digital broadcast reception status diagnosis system according to the embodiment of the present invention.

FIG. 3 is an example of a circuit for determining the electric field strength of a received signal of a broadcast wave.

FIG. 4 is a configuration diagram of a reception status diagnosis system of a conventional digital broadcast reception status diagnosis system.

FIG. 5 is an operation flowchart of a conventional digital broadcast reception status diagnosis system.

[Explanation of symbols]

A: reception antenna B: reception signal processing device C: tuning device D ₁ : determination parameter signal detection means D ₁₁ ... signal strength detection means D ₁₂ ... LOCK signal detection means D ₁₃ ... error number detection means D ₁₄ ... equalizer operating environment Detecting means D ₁₅ ... Tuning means D ₂ ... Receiving state determining means D ₃ ... Receiving diagnostic means D ₄ ... Display means

Claims (3)

[Claims] A determination parameter signal detection unit configured to detect a plurality of types of parameter signals from a reception signal of a digital broadcast wave; a reception status determination unit configured to determine a reception status of each of the detected plurality of types of parameter signals; Digital broadcast reception, comprising: reception diagnostic means for diagnosing the reception status of the digital broadcast radio wave based on the determination result of the reception state determination means; and display means for displaying a diagnosis result by the reception diagnostic means. Situation diagnostic system. 2. The digital broadcasting reception status diagnosis system according to claim 1, further comprising: a tuning unit that selects another broadcasting station in accordance with a result of the determination by the reception state determining unit. Diagnostic system for broadcast reception status. 3. The system for diagnosing a digital broadcast reception situation according to claim 1, wherein said reception state determination means comprises a plurality of types of parameter determination means of the following (1) to (4). A diagnostic system for digital broadcast reception. (1) Equalizer operating environment determining means (2) LOCK signal determining means (3) Received signal electric field strength determining means (4) Error rate determining means