JP2013162371A - Television broadcast receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To notify a user about a possibility that video recording cannot be performed normally in accordance with a receiving state of a television broadcast signal, before video recording is started, in a television broadcast receiver.SOLUTION: A television broadcast receiver 1 comprises a first tuner 2a for viewing and a second tuner 2b for recording where television broadcast signals are received, a C/N detector 4 as a deterioration detector which detects deterioration of the television broadcast signal received by the second tuner 2b, a comparator 8 which compares the deterioration detected by the C/N detector 4 with a preset criterion, an error image signal generator 9 which creates an image error message if the detected deterioration is worse than the criterion in a result of the comparison by the comparator 8, and an image output processor 10 which outputs the image error message created by the error image signal generator 9 on a display screen while superimposing on a live image by the television broadcast signal received by the first tuner 2a.

Description

  The present invention relates to a television broadcast receiving apparatus with a recording function having a plurality of tuners.

  In recent years, television broadcast receivers with a built-in recording function are known, and recording can be easily set. In this way, the program being viewed is recorded and reproduced later. In addition, when there are two or more programs to be viewed at the same time, there are various usages of the recording function such as watching one, setting a recording reservation for recording the other, and playing it at a convenient time. At this time, the user who uses the recording function instructs recording with the expectation that the recording is beautifully performed. However, a problem may occur in the recorded image for some reason, and the user notices this when the recording is finished and the recorded image is reproduced.

  The conventional TV tuner for satellite broadcasting detects from the C / N ratio and the AGC level voltage that the input signal level has dropped and the video reception quality has deteriorated. The telop generation circuit sends out the signal and displays it on the screen (see, for example, Patent Document 1).

  In addition, a conventional satellite broadcast receiving TV has a reception state based on the C / N ratio detected by the circuit that detects the C / N ratio of the antenna input and the signal discrimination circuit output of the video signal discrimination circuit of the tuner unit output signal. A comment is displayed on the screen as to whether the deterioration is due to an abnormal radio wave condition or an abnormal operation of the tuner unit (see, for example, Patent Document 2).

  Furthermore, a conventional digital broadcast receiving apparatus equipped with a plurality of tuners compares the quality of the signals output from the tuners by the tuner characteristic comparison unit. If there is a tuner whose output signal quality is below the threshold, all tuners are compared. The output from is stopped. Alternatively, when there is a tuner whose output signal quality is lower than the threshold, the output path is switched from the tuner having the worst quality (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. 63-200689 Japanese Utility Model Publication No. 3-86683 JP 2006-333285 A

  In the case of a conventional television broadcast receiving apparatus capable of simultaneously viewing and recording, at least two tuners are mounted, and these tuners are designed to control viewing and recording differently, and are divided into functions for viewing and recording. . This viewing tuner is used by a user to view a television program, and the user watches and listens to images and sounds simultaneously with the broadcast of the program. On the other hand, a recording tuner is used to record a program, and since the user cannot watch and listen to images and sounds simultaneously with the broadcast of the program, recording is performed with the recording tuner. I can't know the image quality during recording.

  Therefore, there is a performance difference between the tuner for viewing and the tuner for recording, and when a low-quality TV broadcast wave is received in an area far from the TV radio wave transmission station, the recording tuner is particularly poor. If it is not possible to handle TV broadcast waves, even if there are no problems with the image and sound being watched, there will be a problem that when the recorded image and sound are played back, noise will be mixed and it will not be able to be played normally. It will be extremely disadvantageous.

  In addition, the product is suspected of a product failure and the product quality control is distrusted, giving a negative image.

  Furthermore, even if there is a possibility that noise will be improved by correcting the reception environment, if the cause is not notified to the user, it may be given up that you are living in a noisy area, and an opportunity for appropriate improvement To take away. Recently, it has become possible to watch broadcasted programs for a fee, and it is necessary to avoid the expense of purchasing program contents due to recording failure.

  The present invention has been made to solve the above-described problems. When there is a possibility that the television broadcast receiving apparatus cannot perform normal recording depending on the reception state of the television broadcast signal, the fact is recorded. It is intended to be able to inform the user before starting.

  A television broadcast receiving apparatus according to the present invention detects a first tuner unit for viewing and a second tuner unit for recording that receive a television broadcast signal, and deterioration of the television broadcast signal received by the second tuner unit. A degradation detection unit, a comparison unit that compares detection degradation by the degradation detection unit and a preset reference, and a comparison result by the comparison unit creates an image error message when the detection degradation is worse than the reference An error image signal generating unit that outputs the image error message created by the error image signal generating unit to be superimposed on a live image of the television broadcast signal received by the first tuner unit and output on a display screen And a processing unit.

  According to the present invention, when the detection deterioration by the deterioration detection unit is worse than a preset reference, the image error message is superimposed on the live image by the TV broadcast signal received by the first tuner unit on the display screen. In order to output, it is possible to notify the user in advance that the recording may not be performed normally before the recording is started. In response to this, the user can decide whether to perform recording or to stop recording.

1 is a block diagram illustrating a configuration of a television broadcast receiving device according to Embodiment 1. FIG. 6 is a block diagram showing a configuration of a television broadcast receiving apparatus according to Embodiment 2. FIG. 10 is a block diagram illustrating a configuration of a television broadcast receiving device according to Embodiment 3. FIG. 10 is a block diagram showing a configuration of a television broadcast receiving apparatus according to Embodiment 4. FIG. FIG. 10 is a block diagram showing a configuration of a television broadcast receiving apparatus according to a fifth embodiment.

<Embodiment 1>
FIG. 1 is a block diagram showing a configuration of a television broadcast receiving apparatus 1 according to Embodiment 1 of the present invention. The television broadcast receiver 1 includes a first tuner unit 2a for viewing, a second tuner unit 2b for recording, a first demodulator unit 3a, a second demodulator unit 3b, and a C / N detector unit 4 (degradation detection). Unit), a control unit 5 (for example, CPU), an image output processing unit 10, a display 11, and a recording unit 12 (for example, HDD, BD, DVD). The control unit 5 includes an image processing unit 6, a recording processing unit 7, a comparison unit 8, and an error image signal generation unit 9. For the sake of simplicity, the present embodiment includes two tuner sections, one for viewing and one for recording.

  The first tuner unit 2a outputs, to the first demodulator 3a, a TV broadcast signal of a specific channel for viewing selected by the user for viewing from the TV broadcast signals of a plurality of channels received via the input terminal 18. To do. The second tuner unit 2b receives a TV broadcast signal of a specific recording channel selected by the user for recording from the TV broadcast signals of a plurality of channels received via the input terminal 18, and the second demodulation units 3b and C / N output to the detection unit 4. The first demodulator 3a demodulates the television broadcast signal output from the first tuner unit 2a, and outputs the demodulated image signal to the image processor 6. The second demodulator 3 b demodulates the television broadcast signal output from the second tuner unit 2 b and outputs the demodulated image signal to the recording processor 7. The C / N detection unit 4 detects the C / N ratio, which is the ratio of the carrier and noise of the TV broadcast signal of the recording specific channel received by the second tuner unit 2b, and is received by the second tuner unit 2b. Deterioration of a TV broadcast signal of a specific recording channel is detected.

  The image processing unit 6 performs decoding and signal processing on the image signal demodulated by the first demodulation unit 3 a and outputs the processed image signal to the image output processing unit 10. The recording processing unit 7 performs signal processing so that the recording unit 12 can record the image signal output from the second demodulation unit 3 b, and outputs the processed image signal to the recording unit 12. The comparison unit 8 compares the C / N ratio that is the detection deterioration output from the C / N detection unit 4 with a threshold that is a preset reference, and when the C / N ratio is smaller than the threshold (the detection deterioration is the reference A command to create an image error message is output to the error image signal generator 9.

  The error image signal generation unit 9 receives the command output from the comparison unit 8, creates an image error message based on the command, and outputs the created image error message to the image output processing unit 10. The image output processing unit 10 superimposes a live image that is a live broadcast image by a television broadcast signal of a specific channel for viewing received by the first tuner unit 2a and an image error message output by the error image signal generation unit 9 on the display. 11 is output. The display 11 displays the image signal processed by the image output processing unit 10. The recording unit 12 records the image signal output from the recording processing unit 7.

  Next, the operation of the television broadcast receiving apparatus 1 when viewing a broadcast program in a state where the radio wave condition is in place will be described with reference to FIG. The first tuner unit 2a inputs a plurality of channels of TV broadcast signals taken in by an external antenna (not shown) via the input terminal 18, and a specific channel for viewing from the input plurality of channels of TV broadcast signals. Are extracted and output to the first demodulator 3a. The first demodulator 3 a demodulates the input television broadcast signal and outputs the demodulated image signal to the image processor 6.

  The image processing unit 6 performs decoding and signal processing on the input image signal, and outputs the processed image signal to the image output processing unit 10. The image output processing unit 10 performs an image signal output process so that the input image signal can be displayed on the screen of the display 11, and outputs the processed image signal to the display 11. The display 11 displays an image of a specific viewing channel, that is, a live image, based on the input image signal.

  Next, the operation of the television broadcast receiving apparatus 1 when recording a broadcast program in a state where the radio wave condition is in place will be described using FIG. 1 as in the above case. The second tuner section 2b inputs a plurality of channels of TV broadcast signals taken in by an external antenna via the input terminal 18, and the TV broadcast signal of a specific recording channel among the input plurality of channels of TV broadcast signals. Is output to the second demodulator 3b and the C / N detector 4. The second demodulator 3 b demodulates the input television broadcast signal and outputs the demodulated image signal to the recording processor 7. The C / N detection unit 4 detects the C / N ratio of the input specific channel for recording, and outputs the C / N ratio to the comparison unit 8.

  The comparison unit 8 compares the input C / N ratio with a preset threshold value. Now that the radio wave condition is in place and the detection deterioration satisfies a preset standard, that is, the C / N ratio is equal to or greater than a threshold value, the comparison unit 8 does not output anything, and an error image The signal generator 9 also does not operate. The recording processing unit 7 performs signal processing for recording the image signal input by the second demodulation unit 3b, outputs the processed image signal to the recording unit 12, and the recording unit 12 outputs the input image signal. Record.

  Next, the TV when the user starts recording a broadcast program in a situation where the radio wave condition is poor and the first tuner unit 2a can be normally viewed but the second tuner unit 2b cannot record normally. The operation of the broadcast receiving apparatus 1 will be described. The first tuner unit 2a inputs a plurality of channels of TV broadcast signals taken in by an external antenna via the input terminal 18, and takes out a TV broadcast signal of a specific channel selected by the user for viewing from the input terminal 18. To the first demodulator 3a. On the other hand, the second tuner unit 2b also receives a TV broadcast signal of a plurality of channels captured by an external antenna via the input terminal 18, and takes out a TV broadcast signal of a specific channel selected for recording by the user from the input terminal 18. Output to the second demodulator 3b and the C / N detector 4.

  The first demodulator 3a demodulates the input television broadcast signal and outputs the demodulated image signal to the image processor 6. The image processor 6 performs decoding and signal processing on the input image signal, and performs processing. The performed image signal is output to the image output processing unit 10. The second demodulator 3b demodulates the input television broadcast signal and outputs the demodulated image signal to the recording processor 7. The recording processor 7 records the image signal input by the second demodulator 3b. Perform signal processing.

  The C / N detection unit 4 detects the C / N ratio of the input TV broadcast signal of the specific recording channel, and outputs the C / N ratio to the comparison unit 8. The comparison unit 8 receives the input C / N ratio. Compare the ratio to the threshold. At present, the radio wave condition is poor, and the detection deterioration is worse than a preset standard, that is, the C / N ratio is smaller than the threshold value, so the comparison unit 8 sends an image error message to the error image signal generation unit 9. Send instructions to create. When the error image signal generation unit 9 receives the command from the comparison unit 8, for example, it generates an image error message such as “There is a possibility that the recording may not be performed normally”, and the generated image error message is output to the image output processing unit. 10 is output.

  The image output processing unit 10 receives an image signal for viewing from the image processing unit 6, receives an image error message from the error image signal generation unit 9, and superimposes the image error message on the live image on the display 11. The mixed image processing is performed, and the processed image signal is output to the display 11. The display 11 superimposes and outputs an image error message on the live image based on the input image signal.

  As described above, in the television broadcast receiving apparatus 1 according to Embodiment 1, the C / N ratio of the television broadcast signal of the recording specific channel is compared with a preset threshold value, and the C / N ratio is greater than the threshold value. Is smaller, the image error message is superimposed on the live image and output on the display 11. As a result, there is no problem with viewing because the radio wave condition is bad, but when a TV broadcast signal that may not be recorded normally is received, it cannot be recorded normally. The user can be informed in advance of the possibility before recording starts. In response to this, the user can decide whether to perform recording or to stop recording. Further, it is possible to prevent the inconvenience of knowing that the recording is not normally performed only after the recorded image is reproduced.

<Embodiment 2>
FIG. 2 is a block diagram showing a configuration of a television broadcast receiving apparatus 1A according to Embodiment 2 of the present invention. The television broadcast receiving device 1A according to the second embodiment includes an electric field intensity detection unit 13 as a deterioration detection unit instead of the C / N detection unit 4 in the television broadcast reception device 1 according to the first embodiment. The electric field strength detection unit 13 detects the electric field strength of the input television broadcast signal of the specific recording channel. 2, the same reference numerals as those in FIG. 1 denote the same or corresponding parts as those in the first embodiment, and a description thereof will be omitted.

  TV broadcast receiving apparatus when the user starts recording a broadcast program in a situation where the radio wave condition is bad and the first tuner unit 2a can normally view the video but the second tuner unit 2b cannot record normally The operation of 1A will be described.

  In the present embodiment, the electric field strength detection unit 13 detects the electric field strength of the input television broadcast signal of the specific recording channel, and outputs the detected electric field strength to the comparison unit 8. The comparison unit 8 compares the electric field intensity, which is detection deterioration, with a threshold value, which is a preset reference. At present, the radio wave condition is bad and the detection deterioration is worse than a preset standard, that is, the electric field strength is smaller than the threshold value, so the comparison unit 8 creates an image error message in the error image signal generation unit 9. Send a command to do so. When the error image signal generation unit 9 receives the command from the comparison unit 8, the error image signal generation unit 9 creates an image error message such as “There is a possibility that the recording may not be performed normally” and outputs it to the image output processing unit 10.

  The image output processing unit 10 receives an image signal for viewing from the image processing unit 6, receives an image error message from the error image signal generation unit 9, and superimposes the image error message on the live image on the display 11. The mixed image processing is performed, and the processed image signal is output to the display 11. The display 11 superimposes and outputs an image error message on the live image based on the input image signal.

  As described above, the television broadcast receiver 1A according to Embodiment 2 compares the electric field strength of the television broadcast signal of the recording specific channel with a preset threshold value, and the electric field strength is smaller than the threshold value. Then, an image error message is output on the display 11 while being superimposed on the live image. Thereby, when the electric field strength of the specific channel for recording is weak and smaller than the threshold value, it is possible to notify the user that there is a possibility that the recording cannot be normally performed before the recording is started as in the first embodiment. The effect is obtained.

  Further, if the electric field strength is weakened due to antenna distribution in the home and the second tuner unit 2b cannot normally receive the TV broadcast signal of the recording specific channel, the image error generated by the error image signal generation unit 9 If the content of the message is, for example, “There is a possibility that normal recording is not possible due to weak broadcast radio waves”, the user can be informed of how to improve the reception environment such as installing a booster.

<Embodiment 3>
FIG. 3 is a block diagram showing a configuration of a television broadcast receiving apparatus 1B according to Embodiment 3 of the present invention. The television broadcast receiving device 1B according to the third embodiment includes a delay detection unit 14 as a deterioration detection unit instead of the C / N detection unit 4 in the television broadcast reception device 1 according to the first embodiment. The delay detection unit 14 reflects and refracts a television broadcast signal to a mountain or a building, and arrives later than the original television broadcast signal that directly arrives from the transmitting station, thereby preventing a multi-path that interferes with the original television broadcast signal. Detect the impact. A television broadcast signal that arrives late due to reflection or refraction at a mountain or a building is hereinafter referred to as a delayed wave. 3, the same reference numerals as those in FIG. 1 denote the same or corresponding parts as those in the first embodiment, and a description thereof will be omitted.

  TV broadcast reception when a user tries to record a broadcast program in a situation where the radio wave condition is poor and the first tuner unit 2a is able to watch normally but the second tuner unit 2b cannot record normally. The operation of the device 1B will be described.

  In the present embodiment, the delay detection unit 14 detects a delay time from the reception of the original television broadcast signal directly received from the transmission station to the reception of the delay wave, and outputs the detected delay time to the comparison unit 8. To do. The comparison unit 8 compares the delay time, which is detection degradation, with a threshold value, which is a preset reference.

  At present, the radio wave condition is bad, and the detection degradation is worse than a preset standard, that is, the delay time is larger than the threshold value, so the comparison unit 8 creates an image error message in the error image signal generation unit 9 Send a command to do so. When the error image signal generation unit 9 receives the command from the comparison unit 8, the error image signal generation unit 9 creates an image error message such as “There is a possibility that the recording may not be performed normally” and outputs it to the image output processing unit 10.

  The image output processing unit 10 receives an image signal for viewing from the image processing unit 6, receives an image error message from the error image signal generation unit 9, and superimposes the image error message on the live image on the display 11. The mixed image processing is performed, and the processed image signal is output to the display 11. The display 11 superimposes and outputs an image error message on the live image based on the input image signal.

  As described above, the television broadcast receiving device 1B according to Embodiment 3 compares the delay time of the delay wave included in the TV broadcast signal of the recording specific channel with the preset threshold value, and delays the delay wave. When the time is larger than the threshold, an image error message is output on the display 11 so as to be superimposed on the live image. As a result, it is possible to detect that the television broadcast signal of the specific recording channel is affected by multipath, and the delayed wave interferes with the original television broadcast signal that directly arrives from the transmitting station and affects the reception status. Further, as in the first and second embodiments, it is possible to notify the user that there is a possibility that normal recording cannot be performed before starting recording.

  In addition, if the screen error message indicates that normal recording is not possible due to the influence of multipath, it is possible to notify the user that the problem is due to the influence of the reception environment, not the equipment failure.

<Embodiment 4>
FIG. 4 is a block diagram showing a configuration of a television broadcast receiving device 1C according to Embodiment 4 of the present invention. The television broadcast receiving device 1C according to the fourth embodiment is an aspect in which an audio error notification is added to the television broadcast receiving device 1 according to the first embodiment. The television broadcast receiving device 1C includes a control unit 5C instead of the control unit 5 with respect to the television broadcast receiving device 1, and an audio output processing unit 19 and a speaker 16 are added. The control unit 5 </ b> C has an audio processing unit 15 and an error audio signal generation unit 20 added to the control unit 5. In FIG. 4, the same reference numerals as those in FIG.

  TV broadcast reception when a user tries to record a broadcast program in a situation where the radio wave condition is poor and the first tuner unit 2a is able to watch normally but the second tuner unit 2b cannot record normally. The operation of the device 1C will be described.

  The first tuner unit 2a inputs a plurality of channels of TV broadcast signals taken in by an external antenna via the input terminal 18, and a TV broadcast signal of a specific channel for viewing from the input plurality of channels of TV broadcast signals. Is output to the first demodulator 3a. On the other hand, the second tuner unit 2b also receives a television broadcast signal of a plurality of channels taken in by an external antenna via the input terminal 18, and the television of a specific channel for recording from the inputted television broadcast signals of the plurality of channels. The broadcast signal is extracted and output to the second demodulator 3b and the C / N detector 4.

  The first demodulator 3 a demodulates the input television broadcast signal and outputs it to the image processor 6 and the audio processor 15. The image processing unit 6 performs decoding and signal processing on the input image signal, and outputs the processed image signal to the image output processing unit 10. The audio processing unit 15 performs decoding and signal processing on the input audio signal, and outputs the processed audio signal to the audio output processing unit 19. The comparison unit 8 compares the C / N ratio input from the C / N detection unit 4 with the threshold value, and now the radio wave condition is bad and the detection deterioration is worse than a preset reference. Since the C / N ratio is smaller than the threshold value, a command to create an image error message is sent to the error image signal generator 9 and a command to create a voice error message is sent to the error voice signal generator 20.

  When receiving the command, the error image signal generation unit 9 creates an image error message such as “There is a possibility that the recording may not be performed normally” and outputs the created image error message to the image output processing unit 10. . When receiving the command, the error voice signal generation unit 20 creates a voice error message such as “Recording may not be performed normally” and outputs the created voice error message to the voice output processing unit 19. .

  The audio output processing unit 19 receives an audio signal for viewing from the audio processing unit 15, receives an audio error message from the error audio signal generation unit 20, and mixes the audio error message with live audio that is live broadcast audio. Processing is performed, and the processed audio signal is output to the speaker 16. The speaker 16 mixes and outputs an audio error message to the live audio based on the input audio signal.

  As described above, in the television broadcast receiving device 1C according to Embodiment 4, the C / N ratio of the television broadcast signal of the recording specific channel is compared with a preset threshold value, and the C / N ratio is greater than the threshold value. If it is smaller, the sound error message is mixed with the live sound and output to the speaker 16. Thereby, since the ratio of noise in the broadcast radio wave is large, it is possible to audibly notify the user that recording cannot be performed normally, and it is possible to easily notify visually impaired persons and elderly users.

<Embodiment 5>
FIG. 5 is a block diagram showing a configuration of a television broadcast receiver 1D according to Embodiment 5 of the present invention. The television broadcast receiving apparatus 1D according to Embodiment 5 includes a light emitting unit 17 with respect to the television broadcast receiving apparatus 1 according to Embodiment 1, and the light emitting unit 17 is driven by the error image signal generating unit 9. 5, the same reference numerals as those in FIG. 1 denote the same or corresponding parts as those in the first embodiment, and a description thereof will be omitted.

  TV broadcast reception when a user tries to record a broadcast program in a situation where the radio wave condition is poor and the first tuner unit 2a is able to watch normally but the second tuner unit 2b cannot record normally. The operation of the device 1D will be described. As in the first embodiment, it is an environment where the radio wave condition is bad now, and the detection deterioration is worse than a preset standard, that is, the C / N ratio of the TV broadcast signal of the recording specific channel is lower than the threshold value. Since it is small, the error image signal generation unit 9 creates an image error message, outputs the created image error message to the image output processing unit 10, and causes the light emitting unit 17 to emit light by supplying current to the light emitting unit 17.

  As described above, in the television broadcast receiving device 1D according to Embodiment 5, the C / N ratio of the television broadcast signal of the recording specific channel is compared with a preset threshold value, and the C / N ratio is greater than the threshold value. Is smaller, the light emitting unit 17 is caused to emit light. Thereby, even if the display screen of the display 11 is turned off when recording is attempted, it is possible to notify the user that recording cannot be performed normally.

  In the above embodiment, the operation of the television broadcast receiving apparatus in a situation where the same program as the program being viewed is recorded has been described, but the same effect can be obtained even in the back program recording and timer recording, Not only when recording is attempted, but also by constantly detecting signal deterioration, information can be notified to the user in response to an unstable radio wave environment that changes over time.

  Further, C / N detection, electric field strength detection, and delay time detection may be used in combination, and similar effects can be obtained in various surrounding environments and viewing situations.

  Furthermore, although the case where there is one recording tuner unit has been described in the above embodiment, it goes without saying that the same effect can be obtained with the same circuit configuration even when there are two or more recording tuner units. .

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  1, 1A, 1B, 1C, 1D TV broadcast receiver, 2a first tuner unit, 2b second tuner unit, 4 C / N detection unit, 8 comparison unit, 9 error image signal generation unit, 10 image output processing unit, 13 electric field intensity detection unit, 14 delay detection unit, 17 light emitting unit, 19 audio output processing unit, 20 error audio signal generation unit.

Claims (6)

A first tuner unit for viewing and a second tuner unit for recording;
A deterioration detecting unit for detecting deterioration of the television broadcast signal received by the second tuner unit;
A comparison unit that compares the detection deterioration by the deterioration detection unit with a preset reference;
In the comparison result by the comparison unit, an error image signal generation unit that creates an image error message when the detection deterioration is worse than the reference;
An image output processing unit that superimposes the image error message created by the error image signal generation unit on a live image by the television broadcast signal received by the first tuner unit and outputs the image error message on a display screen. Receiver device.   The deterioration detection unit detects deterioration of the television broadcast signal received by the second tuner unit by detecting a C / N ratio of the television broadcast signal received by the second tuner unit. The television broadcast receiver as described.   2. The deterioration detection unit according to claim 1, wherein the deterioration detection unit detects deterioration of the television broadcast signal received by the second tuner unit by detecting an electric field strength of the television broadcast signal received by the second tuner unit. TV broadcast receiver.   The deterioration detection unit detects deterioration of the television broadcast signal received by the second tuner unit by detecting a delay time of a delay wave included in the television broadcast signal received by the second tuner unit. Item 2. The television broadcast receiver according to Item 1.   The first tuner unit receives an error audio signal generation unit that generates an audio error message when the detection deterioration in the comparison result is worse than the reference, and the audio error message generated by the error audio signal generation unit. The television broadcast receiver according to claim 1, further comprising: an audio output processing unit that mixes the live audio by the television broadcast signal and outputs the mixed audio to a speaker.   The television broadcast receiver according to claim 1, further comprising a light emitting unit that emits light when the detection deterioration is worse than the reference in the comparison result.

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