JPS6062221A - Channel selecting device - Google Patents

Abstract

PURPOSE:To improve the operability of the channel selecting device of, for example, a car radio set by generating a control signal on the basis of the recognition output of a voice recognizing means and varying and setting the reception frequency with the control signal. CONSTITUTION:The car radio set consists of a radio main dody part 10, PLL part 20, data processing part 30, and display and operation part 40. The main body part 20 has an antenna 11, high frequency amplification part 12, frequency conversion part 13, intermediate frequency amplification part 14, detection part 15, low frequency amplification part 16, and speaker SP, and the PLL part 20 has a local oscillator 21, programmable frequency dividing circuit 22, phase comparator 23, reference oscillator 24, and reference frequency dividing circuit 25. The display and operation part 40 has the voice recognizing means 41, and the processing part 30 is controlled by CPU31 to set the frequency division ratio of the circuit 22 on the basis of operation information of the display and operation part 40. Thus, a voice signal detected by a microphone MIC is recognized to make a specific channel selection and perform specific control operation, thus improving the operability.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to radio technology and to a technology that is particularly effective when applied to a radio receiver. It is related to.

[Background technology]

The inventor of the present invention has revealed that wireless technology, particularly wireless receiver channel selection technology, has the following problems.

In other words, in the radio receiver 9, for example, a car radio, when the so-called tuning operation, in which the receiving frequency is selected according to a desired station, is performed only manually, the manual operation interferes with driving operations, and this The problem arises that safe driving becomes impossible. In particular, in the case of car radios, the easiest position for the driver to operate is the shift lever.
, the steering wheel, blinker switch, wiper switch, horn switch, headlight flashing switch, and other operating equipment essential for driving.
There is no room to place a tuning control section for a car radio. Therefore, the automobile radio has to be placed in a position 9 that is difficult to operate from the driver's seat, for example, between the driver's seat and the passenger seat.

This further worsens the operability of car radios, and in particular, the tuning operation has been an obstacle to safe driving.

Additionally, radio is a valuable source of entertainment and an important source of information for people with physical disabilities, such as blind people, or people who are in bed, but it is easy to tune the radio station manually. isn't it.

Therefore, manual operation can be performed even from a remote location.

Although so-called remote controllers are available, these remote controllers are surprisingly troublesome because they are easily lost or dropped.

Furthermore, if you use a radio or television receiver on a daily basis, you may have to get up from your seat every time you tune in.

I often feel the inconvenience of having to get up.

[Purpose of the invention]

The purpose of this invention is to make it possible to easily perform channel selection operations without the need for cumbersome manual operations, thereby greatly improving the operability of, for example, car radios and thereby preventing any hindrance to safe driving. This technology provides technology that makes it possible to

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Summary of the invention]

A brief overview of typical inventions disclosed in this application is as follows.

In other words, by making the channel selection operation based on voice, the hassle of manual operation can be greatly reduced.
This achieves the purpose of greatly improving the operability of channel selection.

〔Example〕

Hereinafter, typical embodiments of the present invention will be described with reference to the drawings.

In addition, in the drawings, the same or mutually depicted parts are indicated by the same reference numerals.

Figures 1 and 2 show an embodiment of a car radio to which a channel selection device according to the present invention is applied.

First, to give an overview, the automobile radio shown in the figure is equipped with a tuning device configured so that the reception frequency can be variably set by a control signal from the outside. This channel selection device is provided with voice recognition means, and the control signal is generated based on the recognition output of this recognition means.

- As a means of variably setting the receiving frequency below, PLL
(phase locked loop) and this P L L
A programmable frequency divider circuit is provided which variably sets the frequency based on the control signal.

Next, a detailed explanation will be given based on FIGS. 1 and 2.

Automobile radio remote control shown in the same figure], radio main body part 10° PLL (phase locked loop) part 20,
It is composed of a data processing section 30 and a display e-operation section 40.

The radio main unit 10 includes an antenna (ANT) 11, a high frequency amplification unit (RF) 12, a frequency conversion unit (MIX) 13,
intermediate frequency amplification section (IF) 14, detection section (DET) 15,
It is composed of a low frequency amplification section (AF) 16 and a speaker SP.

High frequency signal (medium wave radio signal) received by antenna 11
is tuned and amplified by the high frequency amplification section 12, and then converted into an intermediate frequency signal of, for example, 455 Kbz by the frequency conversion section 13. After this intermediate frequency signal is amplified with a predetermined bandwidth (for example, 9Khz) by the intermediate frequency amplification section 14,
The wave is detected by the wave detection section 15. Then, the detected output is amplified by the low frequency amplification section 16 and then acoustically converted by the speaker SP. As a result, the specific broadcast is received, and the received sound is output from the speaker SP.

PLL section 2 consists of a local oscillator (VCO) 21, a programmable frequency divider (PD) 22, a phase comparator 23, a reference oscillator (VCO) 24, and a reference frequency divider circuit 25.

Here, the local oscillator (VCO) 21 is constituted by a voltage-controlled frequency oscillator. Programmable divider circuit (
PD) 22 divides the oscillation frequency Lf of the local oscillator 21 using an arbitrarily set control signal, that is, a frequency division ratio. The reference oscillator (O8C) 24 uses the crystal oscillator X as a frequency reference.

The frequency dividing circuit 25 divides the oscillation frequency range of the reference oscillator 24 by the divided output frequency range of the programmable frequency dividing circuit 22. The phase comparator 23 connects the divided output of the programmable frequency divider circuit 22 and the reference frequency divider circuit 2.
A mutual phase comparison with the frequency-divided output of 5 is performed. Then, the DC level phase comparison output voltage Vc outputted from the phase comparator 23 is inputted to the local oscillator 21 as a frequency control signal. Thereby, the oscillation frequency Lf of the local oscillator 21 is feedback-controlled to a constant frequency determined by the division ratio of the programmable frequency dividing circuit 22. In other words, a PLL is configured. For example, the frequency division ratio of the programmable frequency dividing circuit 22 is set to N.

If the division ratio of the frequency dividing circuit 250 is M and the oscillation frequency of the crystal oscillator 24 is fr, then Lf −-”−・fr is N.
Since and RIJ are natural numbers, Lf is fixed with the stability of the crystal resonator.

The output of the local oscillator 21, whose oscillation frequency Lf is locked as described above, is inputted into the frequency converter 13 as a local frequency signal (local signal). As a result, the difference (Lf-Rf) between the oscillation frequency Lf of the local oscillator 21 and the reception frequency Rf becomes equal to the frequency (455Khz) of the intermediate frequency signal mentioned above.

At the same time, by variably controlling the tuning frequency of the high-frequency amplification section 12 using the phase comparison output voltage Vc, the tuning frequency is adjusted to the difference (Lf-( Lf−Rf)=
Rf). So-called frequency tracking is performed. As a result, so-called image interference is eliminated, and broadcast waves of a predetermined frequency (Rf) are received.

The predetermined receiving frequency is determined by the division ratio Px set in the programmable frequency dividing circuit 22.

The data processing section 30 sets the division ratio Px of the programmable frequency dividing circuit 22 based on the operation information of the display/operation section 40. This data processing section 30 is a CPU
(Central processing unit) 31, ROM (read-only storage device) 3
2. It is composed of a RAM (random access memory) 33, an input/output interface (110) 34, and the like.

CPU3], ROM32. PAM33. The frequency dividing ratio Px to be set in the programmable frequency dividing circuit 22 is calculated from the input/output interface I10 and the input/output interface I10. The ROM 32 stores programs to be executed by the CPU 31. Good luck, RAM
33 provides a work area for the CPU 31 to perform processing operations.

The input/output interface 34 includes a squelch (g-Sk) taken out from the detection section 15 of the radio main body section 10.
are connected via an A/D converter 35. This squelch signal Sk is a carrier wave (carrier) detection signal of a received signal, and is output when there is a received signal, that is, when a local broadcast wave is being received.

The memo display/operation unit 40 includes a voice recognition means 41, a central display unit 42, various operation switches Sl, S2°S3. S4]~
It is composed of S43, S51 to S55, etc.

Although not shown, the voice recognition means 41 expands the voice signal detected by the microphone MIC into a Fourier series to determine the distribution state of its frequency spectrum, and also determines the temporal change (envelope) of the distribution state of the frequency spectrum. The system is configured to compress these data into digital data. As a result, speech recognition data Dx having information characterizing a specific speech signal (or acoustic signal) detected by the microphone MIC is output.

The concentrated display section 42fd, for example, a color display in which a guest-host type liquid crystal display is illuminated from the back, is used. This centralized display section 42 displays the reception frequency determined from the division ratio Px set in the programmable frequency dividing circuit 22, the on/off state of the power supply, and the switch S1.
S2.83.841 to 843, 851 to S55, etc., the operation status and the operation results are transmitted to the CPU 3.
It is displayed intensively based on the control of 1.

The above switch S1.82.83.841~S43°S5
1 to 855 are operated as follows.

That is, the switches S1 and 82 are instantaneous type key switches, and are used when the channel selection operation is performed manually. Once the switch S1 is operated to suppress, the frequency division ratio Px of the programmable frequency dividing circuit 22 is increased at regular intervals until the squelch signal Sk is output.

By kneading, the secondary local oscillation frequency Lf gradually increases (9
Therefore, the receiving frequency Rf also moves from lower to higher. Then, when the squelch signal Sk is output, the operation stops. In other words, when the reception frequency Rf is scanned from low to high and some broadcast radio wave is received, the scanning does not stop at that point and the broadcast radio wave continues to be received. become. Here, when the switch S1 is temporarily suppressed again, the above-mentioned scanning is restarted, and the reception frequency is shifted again until the next higher frequency broadcast wave is received.

Once the switch S2 is suppressed, the division ratio Px of the programmable frequency dividing circuit 22 is decreased at regular intervals until the squelch signal Sk is output. As a result, the local oscillation frequency Lf decreases stepwise (in 9Khz increments), just opposite to the case of switch S1, so that the reception frequency Rf
It also moves from high to low. Then, when the squelch signal Sk is output, the operation is stopped. Here, the reception frequency Rf is scanned from high to low, and when some broadcast radio wave is received, the scanning is temporarily stopped and the broadcast radio waves can be continuously received. be able to do it. here,
When the switch S2 is temporarily suppressed again, the above-mentioned scanning is restarted, and the reception frequency is shifted again until the next lower frequency broadcast wave is received.

The two operations described above are executed by the CPU 31.

As described above, by operating the switches S1 and 82, the reception frequency can be adjusted to any broadcast wave.

Next, switch S3 is operated to change the channel selection operation mode. That is, this switch S3
By this operation, either the manual tuning mode using the switches Sl and S2 described above or the audio tuning mode described later is selected and authorized.

Each of the switches 841 to 343 is an instantaneous type key switch, and is made to function as a preset switch when selecting an audio channel selection mode. Three types of preset switches 841 to 543id (s4'i, S42
．． 543) is provided.

When the first switch S41 is operated to suppress it,
An operation command code 11 that scans and moves the receiving frequency Rf from a lower side to a higher side is issued, and the CPU 31 moves the RA
It is stored in a specific storage area specified in M33.

Further, when the second switch 842 is suppressed, an operation command code 12 for scanning and moving the receiving frequency Rf from a higher side to a lower side is issued, and the operation command code 12 is sent to a specific storage area specified in the RAM 33 by the CPU 31. Stored.

Furthermore, when the third switch S43 is suppressed, the current frequency dividing ratio Px set in the programmable frequency dividing circuit Px at the time of pressing the third switch S43 is changed to
31 is stored in a specific storage area specified in the RAM 33.

Switches 851 to 855 are switches for specifying the storage area of the RAM 33. This switch 851
By selecting and operating S55, storage areas M1 to M5. ml to m5 are selected and specified.

The storage area of the RAM 33 is partitioned like a memory block, not shown in FIG. That is, 2000 (
There are five main storage areas M1 to M5 between the address (hexadecimal number, the same applies hereinafter) to the DFOO address, and each main storage area M
Sub-storage areas m1 to m5 are set respectively.

Further, a buffer storage area Mx having a size of one of the main storage areas M1 to M5 is set.

The main storage areas M1 to M5 respectively store voice recognition data D1 to Dx output from the voice recognition means 42. In addition, d is stored in the sub-storage areas m1 to m5, and an operation command code 11°12 issued when the switches 841 to S42 are suppressed, or the switch 84
The above programmable frequency divider circuit 2 when suppressing 3
Any of the current frequency division ratios Px set to 1 is stored. Furthermore, speech recognition data Dx output from the speech recognition means 42 is temporarily stored in the buffer storage area Mx.

One main storage area M1 to M5 and the above secondary storage areas m1 to m
5 and each pair with each other. That is, CPU31
are Ml and ml, M2 and m2, M3 and m3, M4 and m4
, M5 and m5 are used as a set to input and output data.

Here, first, any one of the switches 851 to S55 is operated to designate one of the main storage areas M1 to M5.

Next, when one of the switches 841 to 843 is selected and suppressed while uttering some short word or sound, this voice is recognized by the voice recognition means 41, and the voice recognition data Dx is Stored in the specified main storage area. At the same time, either the operation instruction code 11.12 or the division ratio Px currently set in the programmable frequency dividing circuit 22 is stored in the sub-storage area attached to the main storage area.

For example, the reception frequency Rf is adjusted in advance to the broadcast radio wave frequency of a broadcasting station named rNHKJ by switches Sl and S2. Further, the main storage area M1 is designated by operating the switch 851. With this state of preparation,
When you utter "N.H.K." while pressing the switch 843, the voice recognition data D1 of this uttered sound is stored in the main storage area M1, and the reception frequency Rf is changed to the above [[
A division ratio P1 that corresponds to the NHKJ broadcast radio wave frequency is stored in the sub-storage area m1.

Similarly, the switches 81 and 82 cause the reception frequency Rf to be
is tuned in advance to the broadcasting LF wave frequency of a broadcasting station called rTBsJ. Furthermore, the main storage area M2 is specified by operating the switch S52. In this preparation state, when the user utters "Tibiinis" while pressing the switch S43, the voice recognition data D2 of this uttered sound is stored in the main storage area M2, and the reception frequency Rf is broadcast 1 of the above rTBS. Frequency division ratio P2 that achieves the wave frequency
is stored in the sub storage area m2.

Furthermore, switch 81. By S2, the reception frequency Rf is adjusted in advance to the broadcast radio wave frequency of the broadcasting station called "Bunka"; 3. Further, the main storage area M3 is specified by operating the switch S53. With this state of preparation,
When you say "Punka-1" while pressing the switch 843, the sound i3 K2 Rt & data D3 of this uttered sound is stored in the main storage area M3, and the receiving frequency Rf becomes the broadcast radio wave frequency of the above "Culture". Frequency division ratio P3
is stored in the sub storage area m3.

Furthermore, it is possible to perform not only a preset operation for specifying a specific broadcast station, but also a preset operation for specifying an operation mode.

For example, the main storage area M4 is specified by operating the switch 854. With this preparation state, switch 8
41 while pressing λ, for example, ``tsugi'' (next), the voice recognition data D4 of this uttered sound is stored in the main storage area M4, and the above-mentioned operation command code 11 specified by the switch 841 is stored as a sub. It is stored in the storage area m4.

Similarly, the main storage area M5 is designated by operating the switch 855 in steps 1 to 1. In this preparation state, for example, if you say "Sita" (downhill) while pressing the switch 842, the voice recognition data D5 of this vocalization will be stored in the main storage area M5.
At the same time, the operation instruction code 12 specified by the switch 842 is stored in the sub storage area m5.

In the manner described above, the presetting for operating the channel selection by voice is completed.

Next, when the switch S3 is operated to select the audio channel selection mode, the audio channel selection operation is performed.

For example, when the user utters "N.H.K.", the recognition data Dx of the utterance is temporarily stored in the buffer storage area Mx. Then, a main storage area is searched in which speech recognition data having a high correlation of a certain level or more with the data Dx stored in this buffer storage area Mx is stored. In this case, the main storage area M1 in which speech recognition data D1 with a high degree of correlation is stored is searched. Then, the contents stored in the sub storage area m1 paired with the main storage area M1 are read out. The content read in this case is rNHKJ
The branching ratio P1 is such that the reception frequency is the broadcast radio wave of the broadcast station named . Therefore, the reception frequency Rf is that r,
Automatically tuned to NHKj's broadcast radio frequency.

Similarly, if you utter, for example, "Tibiinis", the recognition data Dx of this utterance will be stored in the buffer storage area Mx.
K is temporarily stored. Then, the main storage area in which voice recognition data having a high correlation of a certain level or more with the data Dx stored in this buffer storage area Mx is stored is searched again. In this case, the main storage area M2 in which the highly correlated voice recognition data D2 is stored is searched. and,
The contents stored in the sub storage area m2 that forms a pair with the main storage area M2 are read out. The content read in this case is the branching ratio P2 such that the reception frequency is the broadcast radio wave of the broadcast station named rTBsJ. Therefore, the reception frequency Rf is automatically matched to the broadcast radio wave frequency of that rTBsJ.

Similarly, by uttering "Punka", the reception frequency Rf is automatically adjusted to the broadcast radio wave frequency of that one culture.

As described above, it is possible to select and receive the radio waves of a preset broadcasting station using a preset specific voice.

Further, for example, when the user utters "tsugi", the recognition data Dx of this utterance is temporarily stored in the buffer storage area Mx. Then, a main storage area is searched in which speech recognition data having a high correlation of a certain level or more with the data Dx stored in this buffer storage area Mx is stored. In this case, the main storage area M4 in which audio tfHJ data D4 with a high degree of correlation is stored is searched. And its main storage area M
The contents stored in the sub-storage area m4 paired with m4 are read out. The content read in this case is operation command code 1 to scan and move the frequency from low to high.
It is 1. Therefore, in this case, the instruction code 1 is executed by the CPU 31, and the reception frequency Rf gradually moves higher at the point where the broadcast radio waves are received. Then, when some broadcast radio wave is detected, the scanning movement of the receiving frequency Rf is stopped. However, if you say "Tsugi-J" again, scanning will start again and search for the next broadcast wave.

Similarly, when the user utters, for example, "shita", the recognition data Dx of this utterance is stored in the buffer storage area Mx for one day. In step 1-, a main storage area is searched in which speech recognition data having a high correlation of a certain level or more with the data Dx stored in this buffer storage area Mx is stored. In this case, the main storage area M5 in which the highly correlated voice recognition data D5 is stored is searched. And that main memory area MM
The contents stored in the sub-storage area m5 that forms a pair with m5 are read out. The content read in this case is operation command code 1 to scan and move the frequency from high to low.
It is 2. Therefore, in this case, the instruction code 12 is executed by the CPU 31, and the receiving frequency Rf is gradually lowered until the broadcasting wave from the destination is received.
Go. Then, when some broadcast radio wave is detected, the scanning movement of the receiving frequency Rf is stopped. However, if you say "shita" again, scanning will start again and search for the next broadcast wave.

As described above, not only the operation of selecting a specific broadcast wave but also the operation of searching for a broadcast wave that is not preset can be easily performed by voice.

Thereby, in the car radio, it is possible to perform a tuning operation without interfering with safe driving.

Also, in broadcast receiving equipment other than car radios,
For example, people with physical disabilities such as blind people or people in bed can be freed from the trouble of having to carry a remote controller all the time, and can easily operate channel selection.

Furthermore, on a daily basis, you can perform channel selection operations without getting up or leaving your seat, which provides great convenience.

Furthermore, the speech recognized by the speech recognition means 41 does not necessarily have to have a meaning as a language;
It may be a sound that is not a voice. Therefore, even if a person has a language disorder, if he or she can make some sounds,
The above-mentioned audio channel selection operation can be easily performed without any trouble using vocalizations that do not change the language form.

〔effect〕

(1) By providing a voice recognition means and controlling the channel selection based on the recognition data of this voice recognition means, the effect of greatly simplifying the operation of selecting a channel can be obtained. .

(2) Furthermore, by controlling the tuning of the car radio by voice, it is possible to perform the tuning operation without interfering with safe driving.

Although the invention made by the present inventor has been specifically explained above based on examples, it is to be understood that this invention is not limited to the above-mentioned examples and can be modified in various ways without departing from the gist thereof. not. For example, the variable control of the receiving frequency may be performed by switching and selecting a plurality of oscillation circuits or oscillation constants, instead of relying on the PLL method.

[Application field]

The above explanation has mainly been about the application of the invention made by the present inventor to the field of application of the invention, which is the field of application, which is the tuning technology for automobile radios. It can also be applied to channel switching technology in wireless communication devices. This can be applied at least to conditions where the frequency is variably set.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing an embodiment of a car radio to which a tuning device according to the present invention is applied, and FIG. 2 is a diagram showing an example of a memory map set in the RAM in the tuning device. It is. 10... Radio body part, 20... PLT, part, 3
0...Data processing unit, 40...Display/operation unit, 11
...Antenna, 12...Advanced frequency amplification section, 13...
Frequency conversion section, 14... Intermediate frequency amplification section, 15... Detection section, 16... Low frequency amplification section, SP... Speaker,
21... Voltage controlled type r6 part oscillator, 22... Programmable frequency dividing circuit, 23... Phase comparator, 24...
・Reference oscillator, 25...Reference frequency f, & frequency divider circuit, 2
6...Low pass filter, 31...CPU, 32
...ROM, 33...RAM, 34...input/output interface, 41...speech recognition means, 12...
- Centralized display section, Sl, 82.83. To S41 S43. S
5] ~S55...Switch, X...Crystal oscillator, P
x... Frequency division ratio set in the programmable frequency dividing circuit Px, Dx... Voice recognition data, Sk... Squelch signal.

Claims (1)

[Scope of Claims] 1. A channel selection device configured such that a reception frequency is variably set by an external control signal, which is provided with voice recognition means, and performs the above control based on the recognition output of the recognition means. A channel selection device characterized in that a signal is generated. 2. PLL as means for variably setting the receiving frequency
(Phase Locked Loop) A channel selection device according to claim 1, further comprising a programmable frequency dividing circuit that variably sets the lock frequency by PLL based on the control signal. .