JP4752768B2 - Receiving device and electronic device using the same - Google Patents

Description

  The present invention relates to a receiving apparatus that receives a signal and an electronic apparatus using the receiving apparatus.

  Hereinafter, a conventional receiving apparatus will be described with reference to FIG. In FIG. 4, a conventional receiving apparatus 1 includes a first receiving unit 2, a second receiving unit 3, and a demodulating unit 4 connected to the output side of the first receiving unit 2 and the output side of the second receiving unit 3. Have. In addition, an electronic device (not shown) equipped with this conventional receiving device includes a signal processing unit (not shown) that sequentially connects to the output side of the demodulation unit 4 and performs a decoding process of an input signal, a liquid crystal, and the like. And a display unit (not shown).

  Furthermore, the conventional receiving apparatus 1 includes a reception quality determination unit 5 that determines reception quality based on a BER (Bit Error Rate) from the demodulation unit 4, and a first result based on the determination result of the reception quality determination unit 5. A single reception state in which a signal is received using one of the reception unit 2 and the second reception unit 3, and a diversity reception state in which a signal is received using both the first reception unit 2 and the second reception unit 3. And a control unit 6 that performs switching control. When the reception device 1 is in the diversity reception state, the control unit 6 controls the reception device 1 to the single reception state when the quality of the input signal becomes equal to or higher than the predetermined level A, and the reception device 1 is in the single reception state. In some cases, when the quality of the input signal becomes less than the predetermined level B, the receiving apparatus 1 is controlled to be switched to a diversity reception state. Generally, the predetermined level A is set to a level better than the predetermined level B.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
Japanese Patent Laid-Open No. 5-300129

  For example, when the electronic device equipped with the conventional receiving apparatus 1 is in a recording state in which a received signal is recorded using a storage unit (not shown) such as an HDD (Hard Disk Drive), higher reception quality is required. It is done. This is because a program that is to be viewed until it is recorded is often important for the user. However, when the reception device 1 is in the single reception state, a time lag occurs until the reception device 1 is switched to the diversity reception state after the reception quality deteriorates below the predetermined level B and the reception quality is recovered. During that time, there was a problem that a video with poor image quality was recorded in the storage unit.

  Accordingly, an object of the present invention is to prevent image quality degradation under a predetermined condition such as a recording state.

In order to achieve the above object, a receiving device of the present invention is a receiving device capable of switching between a single reception state and a diversity reception state based on a determination result of a reception quality determination unit, and an electronic device equipped with the receiving device. In the recording state in which the device records the signal received by the receiving device , the diversity reception state is set regardless of the determination result of the reception quality determination unit.

  With the configuration described above, it is possible to prevent the receiving apparatus from entering the single reception state even if the quality of the input signal is equal to or higher than the predetermined level A under a predetermined condition such as a recording state. As a result, it is possible to prevent deterioration of the image quality of the receiving apparatus when switching from the single reception state to the diversity reception state under a predetermined condition such as a recording state and to maintain high reception quality.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of a receiving apparatus according to the first embodiment. In FIG. 1, the receiving device 7 is connected to the first receiving unit 10 and the second receiving unit 11 connected to the antennas 8 and 9, the output side of the first receiving unit 10, and the output side of the second receiving unit 11, respectively. The demodulator 12 is provided. In addition, an electronic device (not shown) equipped with the conventional receiving device 7 includes a signal processing unit (not shown) that sequentially connects to the output side of the demodulation unit 12 and performs a decoding process of an input signal, and a liquid crystal And a display unit (not shown).

  Further, the reception device 7 includes a reception quality determination unit 13 that determines reception quality based on a BER (Bit Error Rate) from the demodulation unit 12, and a first reception unit based on the determination result of the reception quality determination unit 13. 10 to switch between a single reception state in which a signal is received using one of the second reception unit 11 and a diversity reception state in which a signal is received using both the first reception unit 10 and the second reception unit 11. And a control unit 14 for controlling. When the reception device 7 is in the diversity reception state, the control unit 14 controls the reception device 7 to the single reception state when the quality of the input signal exceeds the predetermined level A, and the reception device 7 is in the single reception state. In some cases, when the quality of the input signal becomes less than the predetermined level B, the receiving device 7 is controlled to be switched to the diversity reception state. Generally, the predetermined level A is set to a level better than the predetermined level B.

  Furthermore, the receiving device 7 is in a recording state in which an electronic device equipped with the receiving device 7 records a received signal using a storage unit 15 such as an HDD (Hard Disk Drive) and the receiving device 7 is in a diversity receiving state. In some cases, the diversity reception state is maintained even when the quality of the input signal is equal to or higher than the predetermined level A as a result of the determination by the reception quality determination unit 13.

  With the configuration described above, it is possible to prevent the receiving device 7 from entering the single reception state even when the quality of the input signal exceeds the predetermined level A in the recording state. As a result, in a recording state where higher reception quality is required, it is possible to prevent image quality deterioration when switching from the single reception state to the diversity reception state, and to maintain high reception quality.

  The reception quality determination unit 13 may be connected anywhere as long as it is connected to the output side of the first reception unit 10 and the second reception unit 11. You may determine by (Carrier / Noise) ratio.

(Embodiment 2)
The second embodiment of the present invention will be described below with reference to FIG. FIG. 2 is a block diagram of a receiving apparatus according to the second embodiment. The description of the same configuration as that of the first embodiment will be omitted, and differences will be described in detail.

  In FIG. 2, the control unit 14 is in a state where power is supplied to the electronic device from the outside of the electronic device on which the receiving device 7 is mounted, and the quality of the input signal when the receiving device 7 is in the diversity reception state. Control is performed so that the receiving device 7 is maintained in the diversity reception state even when the signal becomes equal to or higher than the predetermined level A. The state in which electric power is supplied to the electronic device from the outside of the electronic device is, for example, a case where the power source of the electronic device is connected to the power supply unit 16 that is a cigar light of an automobile.

  In a state where power is supplied to the electronic device from the outside of the electronic device, sufficient power is supplied to the electronic device. Therefore, the receiving device 7 may be in a diversity reception state where power consumption is large. With the above configuration, when power is supplied to the electronic device from the outside of the electronic device, the receiving device 7 is prevented from being in a single reception state even if the quality of the input signal exceeds the predetermined level A. As a result, it is possible to prevent image quality deterioration when switching from the single reception state to the diversity reception state, and to maintain high reception quality.

(Embodiment 3)
The third embodiment of the present invention will be described below with reference to FIG. The description of the same configuration as that of the first embodiment will be omitted, and differences will be described in detail.

  In FIG. 1, the control unit 14 determines the quality of the input signal when the information included in the signal received by the receiving device 7 is information on a program frequently viewed by the user and the receiving device 7 is in a diversity reception state. Control is performed so that the receiving device 7 is maintained in the diversity reception state even when the signal becomes equal to or higher than the predetermined level A. Note that information on programs frequently viewed by the user is recorded in, for example, a storage unit 15 connected to the control unit 14.

  Programs that are frequently viewed by the user are generally important to the user. With the above configuration, when the information included in the signal received by the receiving device 7 is information on a program frequently viewed by the user, the receiving device 7 even if the quality of the input signal exceeds a predetermined level A. Can be prevented from becoming a single reception state, thereby preventing image quality degradation when switching from the single reception state to the diversity reception state and maintaining high reception quality.

  In addition, when the control unit 14 receives an input operation from the user to make the receiving device 7 always in the diversity reception state, the control unit 14 receives the diversity signal from the receiving device 7 even when the quality of the input signal becomes a predetermined level A or higher. You may control so that it may maintain in a state. Thereby, when the user wants to watch a program while maintaining a high-quality image state, even if the quality of the input signal exceeds a predetermined level A, the receiving device 7 is prevented from being in a single reception state, Thereby, it is possible to prevent image quality deterioration when switching from the single reception state to the diversity reception state.

(Embodiment 4)
Embodiment 4 of the present invention will be described below with reference to FIG. FIG. 3 is a block diagram of a receiving apparatus according to the fourth embodiment. Unless otherwise specified, the configuration of the fourth embodiment is the same as that of the first, second, and third embodiments.

  As shown in FIG. 3, the receiving device 7 uses a first reception state in which a signal is received with a first reception sensitivity and a second reception higher than the first reception sensitivity, instead of the first reception unit 9 and the second reception unit 10. A receiving unit 17 having a second reception state for receiving a signal with sensitivity is provided. For example, the first reception state is a power saving state in which the amplification degree of an amplifier (not shown) connected to the inside of the reception unit 17 is suppressed from the normal time, and the second reception state is inside the reception unit 17. This is a normal state in which the amplification degree of the connected amplifier is larger than that in the power saving state.

  Similarly to the first embodiment, the reception device 7 demodulates the signal output from the reception unit 17 and the reception quality determination for determining the reception quality based on the BER from the demodulation unit 12. Unit 13.

  Then, when the reception unit 17 is in the second reception state, the control unit 14 sets the reception unit 17 to the first reception state when the determination result in the reception quality determination unit 13 is equal to or higher than the predetermined level A, and the reception unit 17 Is in the first reception state, when the determination result in the first reception quality determination unit 13 is less than the predetermined level B, the reception unit 17 is set in the second reception state.

  Furthermore, the reception device 7 is configured so that, for example, when the electronic device on which the reception device 7 is mounted is in a recording state, or when power is supplied to the electronic device, information included in the reception signal is frequently received by the user. The second reception state is maintained regardless of the determination result of the reception quality determination unit 13 when it is the information of the program to be viewed at the time or when the input operation for switching to the diversity reception state is received from the user. .

  With the above-described configuration, it is possible to prevent the receiving device 7 from entering the first reception state even if the quality of the input signal is equal to or higher than the predetermined level A in a predetermined condition, for example, a recording state. As a result, it is possible to prevent deterioration in image quality when switching from the first reception state to the second reception state under predetermined conditions, and to maintain high reception quality.

  The receiving device of the present invention can prevent deterioration in image quality and maintain high reception quality under a predetermined condition such as a recording state. Therefore, the receiving device is particularly suitable for electronic devices such as a portable terminal with a TV function and an in-vehicle receiving device. Useful.

Block diagram of receiving apparatus according to embodiments 1 and 3 of the present invention The block diagram of the receiver in Embodiment 2 of this invention The block diagram of the receiver in Embodiment 4 of this invention Block diagram of conventional receiver

Explanation of symbols

DESCRIPTION OF SYMBOLS 7 Receiving device 8, 9 Antenna 10 1st receiving part 11 2nd receiving part 12 Demodulation part 13 Reception quality determination part 14 Control part 15 Storage part 16 Power supply part 17 Receiving part

Claims (2)

A first reception unit, a second reception unit, a reception quality determination unit that is connected to the output side of the first reception unit and the output side of the second reception unit and determines the quality of the input signal;
Based on the determination result of the reception quality determination unit, a single reception state in which a signal is received using one of the first reception unit and the second reception unit, and the first reception unit and the second reception A diversity reception state in which a signal is received using both of the units, wherein the reception is performed in a recording state in which an electronic device equipped with the reception device records a signal received by the reception device. A receiving apparatus that enters the diversity reception state regardless of the determination result of the quality determination unit. A receiving device according to claim 1;
An electronic device comprising a display unit connected to the output side of the receiving device.

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