JPH10190499A - Tuning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To select the station of an excellent reception state even between different media by converting and correcting the quality signals of input signals to comparable data and outputting signals selected by comparing quality data. SOLUTION: A reception system 11 receives digital broadcasting and the error rate of digital data for indicating reception quality is detected in a reception state detection part 12. A detection output is the digital data, passed through a comparison part 5 and a data conversion part 13 and corrected in a correction part 14. The reception system 21 receives analog broadcasting and a detection signal level for indicating the reception quality is detected in the reception state detection part 22 as an analog value. The detection output of the reception state detection part 22 is converted into the digital data in the data conversion part 23 so as to be matched with the digital comparator of the comparison part 5 and outputted to the correction part 24. The respective detection outputs are corrected so as to be the same data when an acoustic feeling is the same in the correction parts 14 and 24. As a result, the signals of the reception system of the excellent reception state are outputted to an output part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel selection system for selecting a reception system having a better reception condition, and more particularly to a channel selection system for switching a reception system among a plurality of reception systems having different media.

[0002]

2. Description of the Related Art In a conventional tuning system, reception levels of reception waves from two broadcasting stations are detected, respectively, and
A comparison circuit compares the two reception levels and switches the reception frequency so as to receive a broadcast station having a higher reception level. As the reception level, a carrier signal level, a detected signal level, and the like were used.

[0003]

When switching to a station having a good reception state between the same media, for example, by analog FM broadcast waves, the reception levels such as the carrier signal level and the detection signal level are compared and the signal level is compared. I should have switched to a higher level station. However, in recent years, the types of media have been diversified. For example, analog media and digital signals, or different media such as FM radios and televisions have been mixed even with the same analog signal. Even in such a state, it is necessary to select a station having a good reception state.
However, even in analog broadcasting, a difference in reception state occurs at the same reception level due to a difference between FM and AM broadcasting systems, and a difference in a received signal error rate also occurs between digital broadcasting due to a difference in broadcasting system. Therefore, it is difficult to determine the quality of the reception state based on the reception level.

[0004] It is an object of the present invention to provide a channel selection system capable of objectively evaluating a reception state between different media and selecting a station having a better reception state.

[0005]

In order to achieve the above object, the present invention provides a plurality of state detecting means for outputting a quality signal corresponding to the signal quality of input signals from a plurality of media, and the plurality of state detecting means. A plurality of data conversion means for converting the plurality of signal qualities detected by the means into a predetermined data format which can be compared, and the data converted by the plurality of data conversion means being the same data in the same reception state. Correcting means for correcting, comparing means for comparing the quality data for the plurality of media corrected by the correcting means, and selecting one input signal from the plurality of media based on a comparison result of the comparing means. And a selection output means for outputting the selected output.

Further, the quality signal is characterized in that an analog input signal and a digital input signal are mixed. Further, the quality signal is an output signal level of a plurality of receiving means for receiving broadcasts from a plurality of broadcast media. Further, the correction means includes a variable means capable of adjusting a correction value so that the plurality of media have the same data in the same reception state.

Further, the variable means includes an operation switch, and the variable means adjusts the correction value based on a time during which the operation switch is operated. The variable means includes an operation switch, and the variable means adjusts the correction value based on the number of times the operation switch is operated.

Further, the variable means has an operation switch, and the variable means adjusts the correction value based on a pressing strength of the operation switch. The variable means includes an operation switch, and the variable means adjusts the correction value based on a signal level of the medium input when the operation switch is operated. Is what you do.

[0009]

FIG. 1 is a block diagram showing the structure of a channel selection system according to a first embodiment of the present invention. Hereinafter, description will be made with reference to the drawings. 11 and 21 are receiving systems for receiving broadcast waves.
The receiving system 11 receives a digital broadcast, and the receiving system 21 receives an analog broadcast. Reference numerals 12 and 22 denote reception state detectors for detecting signal levels received by the reception systems 11 and 21, for example, detecting a detection signal level of a reception wave and an error rate of demodulated digital data. Reference numerals 13 and 23 denote data converters for converting data of the signal level detected by the reception state detectors 12 and 22 into data that can be compared by the comparator 5. Numerals 14 and 24 are correction units for unifying different reception states between the reception systems. Reference numeral 3 denotes a selector for selecting which input of the receiving systems 11 and 21 to output to the output unit 4 based on the comparison result of the comparison unit 5. 4
Denotes an output unit including an amplifier, a speaker, and the like. Reference numeral 5 denotes a comparison unit for comparing the outputs corrected by the correction units 14 and 24, which is a digital comparator composed of a microcomputer (microcomputer) or the like.

Next, the operation will be described. A receiving system (digital broadcast receiving unit such as a digital radio) 11 receives a digital broadcast (digital radio broadcast wave), and an error rate of digital data indicating the reception quality is detected by a reception state detecting unit 12. The detection output of the reception state detection unit 12 is digital data, and the data conversion unit (non-converter) 13 does not perform data conversion because the comparison unit 5 is a digital comparator, and outputs the data to the correction unit 24 as it is. On the other hand, a receiving system (analog broadcast receiving unit such as AM radio) 21 receives an analog broadcast (AM radio broadcast wave), and a detection signal level indicating the reception quality is detected by a reception state detecting unit 22 as an analog value (data). (For example, 2 V at the operational amplifier output). In order to match the detection output of the reception state detection unit 22 with the digital comparator of the comparison unit 5, analog data is converted to digital data in a data conversion unit (A / D converter) 23 and output to the correction unit 24. .

The respective detection outputs are output to the correction unit 1
If the audibility is the same in 4 and 24, correction is made so that the same data is obtained. The details of the correction will be described in a second embodiment. The comparing unit 5 compares the converted digital data and instructs the selector 3 to output a signal of the receiving system with high reception quality to the output unit 4. As a result, a signal of the receiving system in a good receiving state is output to the output unit 4.

As described above, after being corrected by the data conversion unit and the correction unit, the data is converted to a comparable level and can be compared by the comparison unit. Can be easily selected. As described above, in the present embodiment, it becomes possible to receive two broadcast waves having different receiving systems and automatically switch to a receiving system having a better receiving state.

In this embodiment, a digital broadcast receiving section is provided as the receiving system 11, an analog broadcast receiving section is provided as the receiving system 21, a non-converter (no conversion) is provided as the data converting section 13, and an analog / digital converter is provided as the data converting section 23. Although an example in which a digital converter (A / D converter) is provided and a digital comparator is provided as the comparison unit 5 has been described, a combination of a reception system, a data conversion unit, and a comparison unit as shown in FIG. Is also possible (showing 12 embodiments,
This embodiment corresponds to the sixth of these). In the receiving system of FIG. 2, the analog input is an analog input such as a tape recorder having no broadcast receiving system, and the digital input is a digital input such as a DC (compact disc) having no broadcast receiving system. The analog broadcast receiving system is a receiver such as an AM, FM radio, and television, and the digital broadcast receiving system is a receiver such as a digital radio and a digital television. In the data converter of FIG. 2, the A / D converter converts analog data to digital data, the D / A converter converts digital data to analog data, and the non-converter does not convert the input. It is output as it is. Further, in the comparison section of FIG. 2, the analog comparator is a comparator or a microcomputer for comparing analog data, and the digital comparator is a microcomputer or the like for comparing digital data.

FIG. 3 is a block diagram showing a configuration of a channel selection system according to a second embodiment of the present invention. Hereinafter, description will be made with reference to the drawings. Reference numeral 6 denotes a correction value adjustment unit for adjusting the correction values of the correction units 14 and 24 in advance. Reference numeral 7 denotes an input section for inputting a correction value to be adjusted, and a data input section 71 for inputting a value to be manually adjusted by a viewer, or a value to be adjusted corresponding to a time when the switch 82 is pressed. Measuring unit 72 for inputting a value to be adjusted according to the number of times the switch 83 is pressed
3, or a strength measuring section 74 for inputting a value to be adjusted in accordance with the strength when the switch 84 is pressed. It should be noted that the receiving systems 11, 21, the receiving state detecting units 12, 22, the data converting units 13, 23, the correcting unit 14,
24, the selector 3, the output unit 4, and the comparison unit 5 have the same names, functions, and operations as those of the first embodiment, and therefore, are assigned the same numbers, and descriptions thereof are omitted.

Next, the adjusting operation will be described. For example, when the correction value is adjusted by the data input unit 71, the lowest value at which a good reception state is obtained is input to the correction units 14 and 24. When the correction value is adjusted by the time measurement unit 72, the correction unit 14, 24 is kept pressed for the minimum time during which a good reception state is obtained. Hereinafter, the frequency measurement unit 7
In the case where the correction value is adjusted by 3 and the strength measuring unit 84, the operation may be performed with the minimum number of times and the strength at which a good reception state is obtained.

An output signal output from the selector 3 during reception (for example, the reception system 11 is selected) is input to the correction value adjustment unit 6, and the listener is determined to be in a good reception state. Is determined, the switch 80 is pressed to determine the correction value of the correction unit 14. Similarly, when an output signal output from the selector 3 during reception (the reception system 21 is selected) is input to the correction value adjustment unit 6, when the listener determines that the reception state is good, , Switch 80
Is pressed to determine the correction value of the correction unit 24. In this way, a correction value can be set when the listener determines that the listener is in a good reception state.

As described above, in the present embodiment, the correction for adjusting the receiving state of two different broadcast waves of the receiving system can be easily performed.

[0018]

As described above, according to the present invention, it is possible to provide a channel selection system capable of objectively evaluating the reception state between different media and selecting a station having a better reception state.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a channel selection system according to a first example of the present invention.

FIG. 2 is a diagram illustrating another configuration example of the tuning system according to the first embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a channel selection system according to a second example of the present invention.

[Explanation of symbols]

······································································
... Output unit, 13, 23 ... Data conversion unit
5 ··· Comparison unit, 14, 24 ··· Correction unit,
6 ··· Correction value adjustment unit.

Claims (8)

[Claims] 1. A plurality of state detecting means for outputting a quality signal according to signal quality of an input signal from a plurality of media, and a predetermined signal capable of comparing the plurality of signal qualities detected by the plurality of state detecting means. A plurality of data conversion means for converting data into a data format; a correction means for correcting data converted by the plurality of data conversion means to be the same data in the same reception state; and the plurality of data corrected by the correction means. Comparing means for comparing the quality data of the plurality of media, and selecting and outputting means for selecting and outputting one input signal of the plurality of media based on the comparison result of the comparing means. Tuning system. 2. The tuning system according to claim 1, wherein the quality signal is a mixture of an analog input signal and a digital input signal. 3. The tuning system according to claim 1, wherein the quality signal is an output signal level of a plurality of receiving units that receive broadcasts from a plurality of broadcast media. 4. The apparatus according to claim 1, wherein said correction means includes a variable means capable of adjusting a correction value so that said plurality of media become the same data in the same reception state. Tuning system. 5. The apparatus according to claim 4, wherein said variable means includes an operation switch, and said variable means adjusts said correction value based on a time during which said operation switch is operated. Tuning system. 6. The selection device according to claim 4, wherein said variable means includes an operation switch, and said variable means adjusts said correction value based on the number of times the operation switch is operated. Bureau system. 7. The apparatus according to claim 4, wherein said variable means includes an operation switch, and said variable means adjusts said correction value based on a pressing strength of said operation switch. Tuning system. 8. The variable means includes an operation switch, and the variable means adjusts the correction value based on a signal level of the medium input when the operation switch is operated. The tuning system according to claim 4, wherein: