JPH0483428A - Receiver - Google Patents

Abstract

PURPOSE:To eliminate the need for a preset operation by a user by providing a means for storing the station frequency information of a broadcasting station for transmitting the same broadcasting contents together with information corresponding to the station name and a means for allocating a broadcasting station to be preset to a channel. CONSTITUTION:This receiver is provided with the storage means 10 for storing the station frequency information of a broadcasting station for transmitting the same broadcasting contents together with information corresponding to the station name and the broadcasting station allocating means 42 for allocating a broadcasting station to be preset in each channel in accordance with a receiving area and the name of the allocated broadcasting station is displayed. Optimum station frequency information out of the information stored in the storage means 10 in each allocated broadcasting station is selected in accordance with the arranging position and the environment of the receiver and the broadcasting station name is displayed by a broadcasting station name display means. Consequently, the preset operation can be easily and rapidly executed and one easy step channel selection can be executed without executing complex operation immediately after purchasing the receiver.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a receiver called a preset tuner, and eliminates the need for the user to perform troublesome preset operations 1'F. 17 so that it can automatically tune to a frequency with the best reception quality when it is being broadcast on TV.

[Conventional technology]

Conventional preset tuners tune to any broadcasting station manually or automatically by searching (scanning), and input the station frequency information (transmission frequency value, PLL loop frequency division ratio (N
value) and other values corresponding to the transmission frequency (17 values) corresponding to the transmission frequency are specified in the memory. There was one that made it possible to select channels instantly.

There are also devices that automate the preset operation and sequentially preset received broadcast stations through automatic search.

Further, as a card-based preset channel selection system, there is a system in which preset information is stored in cards for each region, and automatic presetting is performed by setting the card for the region to be received into the receiver body.

[Problem to be solved by the invention]

In the method of presetting by the user's preset operation, the preset operation is troublesome and cannot be used unless the user knows how to operate. Also, since only the frequency was displayed and the station name was not displayed, it was not possible to ascertain the station name. Furthermore, when the same station is broadcasting the same broadcast content on multiple frequencies, it takes time and effort to select a frequency with good reception quality.

Although the automatic presetting method is automatic, it takes time to perform the presetting and lacks speed. Also, I couldn't figure out the station name. In addition, the system simply presets stations that can be received through automatic scanning, and there is no guarantee that all preset channels will be filled with optimal stations. In other words, you may end up presetting a station with a weak electric field, and in such a case, even if there is an identical station with better reception, the number of preset channels is limited, so you should preset that station. There were times when it was not possible.

In the case of card-type presets, if you memorize even low-power stations and local stations, the number of preset channels, display areas, selection areas, etc. will become enormous, which will increase costs and may even make it less user-friendly. Therefore, only the main stations, that is, the key stations with high power, are stored. For this reason, depending on the reception area, even though it is possible to receive better reception at nearby local stations or low-power stations than at distant key stations, people are forced to tune to key stations with poor reception conditions, resulting in high-quality reception. I couldn't do it. In other words, as long as the card is used, the preset contents are uniform, and it is not possible to preset the optimal station that matches the individual reception conditions in each smaller area.

The present invention solves the problems in the conventional technology, eliminates the need for troublesome preset operations by the user, and also allows the user to select a frequency with good reception quality when the same broadcasting station is broadcasting on multiple transmission frequencies. It is an object of the present invention to provide a receiver that can be automatically tuned.

[Means to solve the problem]

This invention provides a storage means for storing station frequency information of broadcast stations in various regions, including broadcast stations that transmit the same broadcast content on a plurality of different frequencies, together with information corresponding to the station names, and broadcasting station assignment means for assigning a broadcasting station to be preset to a channel; broadcasting station name display means for displaying the assigned broadcasting station name; and said storage for each broadcasting station assigned to each channel by said broadcasting station assignment means. station frequency information selection means for selecting the optimum one according to the installation location and installation environment of the receiver among the station frequency information stored in the means; a channel selection means for specifying a receiving channel; The apparatus includes a tuning means for tuning the broadcasting station selected by the station means to the frequency selected by the station frequency information selection means.

[For production]

According to this invention, the broadcasting station assignment means assigns a broadcasting station to be preset to each preset channel according to the reception area, and among the station frequency information stored in the storage means for each assigned broadcasting station. The most suitable one is selected depending on the installation location and installation environment of the receiver. Further, the broadcast station name is displayed by the broadcast station name display means.

According to this, presetting is done automatically, so
2 Preset operations become easier and faster, allowing one-touch channel selection without any difficult operations immediately after purchase. Further, it is possible to individually preset the optimal station for each narrower area within the reception area, and only stations that can receive good reception can be effectively assigned to a limited number of preset channels. Further, the station name of the preset station can be known by the broadcast station name display means.

〔Example〕

The present invention will be explained in detail below.

(Embodiment 1) An embodiment will be described in which the station frequency information selection means is configured to select the optimum frequency based on electric field strength detection at the installation location.

First, the equipment configuration will be explained. FIG. 2 shows an example in which the broadcast station display means is configured as a card.

This is done by dividing the entire country of Japan into several blocks (for example, Hokkaido, Tohoku region, Kanto region, etc.).
This is an assignment of cards.

The card 10 is printed with the broadcasting station name 12 of each channel (here, 5 channels are shown) assigned to that block. At the end of the card 10, a block identification code 14 for identifying the card type (that is, block) is formed with a bright and dark pattern, a notch pattern, an uneven pattern, a magnetic pattern, etc. A knob 16 is formed at the other end for attaching and detaching the card to and from the receiver.

Figure 3 shows the front panel configuration of the receiver. The front panel 18 of the receiver] 6 has a selection button 20 for each channel.
A frequency display 22, a power switch 23, etc. are provided. A card mounting portion 22 is formed on the back of the panel above the channel selection button 20, into which the card 10 is inserted from the side and detachably mounted. Card mounting section 22
A display window 24 is provided on the front panel 18 at the position , and the broadcasting station name 12 of the card 10 is displayed through this display window 24. Lamps (not shown) are arranged at the back of each display window 24, and the selected channel is lit and the name of the broadcasting station is displayed in relief by backlighting. A code detector 2 is installed at the end of the card mounting section 22.
6 is provided to detect the block identification code 14 (FIG. 2) at the end of the inserted card 10.

The configuration of a control system for preset channel selection built into this receiver 1 is shown in FIG. FM broadcast waves are received by the antenna 28 and input to the front end 30. The front end 30 converts the received signal into an intermediate frequency signal using a local oscillation signal from the local oscillator of the PLL 1c32. The intermediate frequency signal is detected by a detector 34, separated into left and right channels by a demodulation circuit 36, and output.

The AM broadcast signal is also demodulated through a separate AM receiving circuit.

In the ROM 38, all the station frequency information of broadcasting stations nationwide (or broadcasting stations that can be received in sales areas among the roughly divided regions of the country) is stored, for example, as the N value (frequency division ratio) of a PLL circuit. There is.

An example of the contents stored in the ROM 38 is shown in Table 1.

In Table 1 and FIG. 1, the key matrix 4o inputs the on information of the channel selection button 20 and the block identification information obtained by the code detector 26 to the microcomputer 42. ROM4B in the microcomputer 42 (or external RO
M) stores information on assignment of stations to each preset channel for each block. Table 2 shows an example of the storage contents (for one block) of the ROM4B.

Table 2 The microcomputer 42 reads the broadcasting station assignment information of the block corresponding to the block identification information from the ROM 43, and calculates the N value of the broadcasting station of the channel selected by the channel selection button 20.
Read from OM38 and set in PLL-IC32,
Tune into that frequency. In addition, if the selected broadcasting station has multiple N values, these are sequentially applied to the PLL-IC3.
2, the electric field strength is detected from the output of the wave detector 34, and the frequency is tuned to the frequency where the electric field strength is the strongest.

FIG. 4 shows a control flowchart for preset channel selection by the control block of FIG. 1. Set the block card 10 that includes the installation location of the receiver 16 in the receiver 16,
Select the station you wish to receive from among those displayed on card 10,
Press the channel selection button 20 at that position (Pl). As a result, the microcomputer 42 identifies the card, that is, the block, based on the detection signal of the code detector 26, and assigns a station to each channel based on the stored contents of the ROM 43 (for example, (as shown in Table 2) (P2). Also, microcontroller 4
2 identifies the channel on which the selection button 20 was pressed.
3). RO the N value of the station assigned to that channel.
Read from M38 (P4). If the station has multiple frequencies, set them in sequence to the PLL-IC32,
At that time, the electric field strength is detected from the output of the wave detector 34, and the frequency with the strongest electric field strength is selected as the optimum frequency. Once the frequency is determined, the PLL-IC 32 is set to that frequency, muting is canceled, and the station is received (P5). The selected station name will be highlighted and displayed with a backlight. Further, the reception frequency at this time is displayed on the frequency display 22.

If one station has multiple frequencies, once the optimal frequency is selected, the N value is stored in the RAM of the microcomputer 42 unless the card is removed. By performing tuning control based on the data stored in the RAM or the like, it is possible to eliminate the trouble of detecting the electric field strength each time a channel selection operation is performed, and to increase the speed of channel selection.

In addition, the station name display is not based on a card, but on a station name display 4 using LED or LCD segments as shown in Figure 5.
4 can also be used.

(Example 2) Another example of the present invention will be described. Here, the station frequency information selection means is configured as means for specifying an area smaller than a block. FIG. 6 shows the front panel configuration of the receiver. The front panel 48 of the receiver 46 includes a channel selection button 50, a station name display 52 with LEDs, LCDs, etc., and block names such as prefecture names with LEDs and L.
A block display 54 for displaying a CD or the like, a narrow area (municipality) display 56 for displaying the narrow area name (in this case, municipality name) within the block using an LED, LCD, etc. are provided.

Furthermore, a proportion key 57 and a block selection dial 58 are provided on the left side, and a narrow area selection dial 60 for selecting a narrow area within the selected block is provided on the right side.

The configuration of a control system for preset channel selection within the receiver 46 is shown in FIG.

FM broadcast waves are received by the antenna 28 and input to the front end 30. Front end 30 is PLL-I
The received signal is converted into an intermediate frequency signal by a local oscillation signal from a local oscillator of C32. The intermediate frequency signal is detected by a detector 34, separated into left and right channels by a demodulation circuit 36, and output. The AM broadcast signal is also demodulated through a separate AM receiving circuit. The ROM 38 stores all the station frequency information of broadcasting stations nationwide (or broadcasting stations that can be received in sales areas among the roughly divided regions of the country) as, for example, the N value of a PLL circuit, that is, the frequency division ratio. . Here, different addresses are assigned to different frequencies of the same broadcasting station.

The ROM 4B (or external ROM) in the microcomputer 42 stores station assignment information to each preset channel for each block. Furthermore, for stations having multiple frequencies, information on selecting the optimum frequency is stored for each municipality within the program. Optimum frequency information is set in advance at the factory based on actual measurements of the reception conditions in each narrow area, transmission output, distance from the transmission location, etc.

A control flowchart for preset channel selection by the control block of FIG. 7 is shown in FIG. When using the receiver set for the first time after purchase, or when re-allocating as necessary, turn on the ratio key 57 to perform the operation using the ratio P10). (From now on, unless the proportion key 57 is operated, the content will be retained in the proportion.) When the proportion is operated, turn the block selection dial 58 to select the block that includes the installation location of the receiver 46. Select (pH). The selected block name is displayed on block indicator 5.
4 will be displayed. When a block is selected, the microcomputer 42
Stations are assigned to each channel based on the contents stored in the ROM 43 (PI3). The assigned station name is displayed on the station name display 52 (P13).

Next, the narrow area selection dial 60 is turned to select the name of the city, town, or village indicating the installation location of the receiver 46 within the selected block (PI3). The selected city, town, or village name is displayed on the narrow area display 56. As a result, for stations that have multiple frequencies among the stations assigned to each channel, the optimum frequency information for that municipality is determined based on the stored contents of the ROM 43 in the microcomputer 42. For single frequency stations, that frequency is used (PI3).

In this way, frequency assignment to each channel is determined.

In this state, when you select the desired station to receive from among those displayed on the station name display 52 and press the channel selection button 50 at that position (PI3), the microcomputer 42 assigns the PLL-IC 32 to that channel. Set the frequency and
Cancel muting and listen to that station (P
17).

Note that the blocks may be divided not by prefecture but by more general division (Hokkaido, Tohoku region, Kanto region, etc.). Further, the narrow band may be divided not by city, town, or village, but by county or prefecture.

〔Effect of the invention〕

As explained above, according to the present invention, the broadcasting station assignment means assigns a broadcasting station to be preset to each preset channel according to the reception area, and each assigned broadcasting station is stored in the storage means. Since the most suitable station frequency information is selected according to the location and installation environment of the receiver, presetting is performed automatically, making presetting operations easy and quick, making it easy to use immediately after purchase. One-touch channel selection is possible with simple operations. Further, it is possible to individually preset the optimal station for each narrower area within the reception area, and only stations that can receive good reception can be effectively assigned to a limited number of preset channels. Furthermore, the station name display means allows the station name of the preset station to be known, which improves usability.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.
This is an example of a system configuration for preset channel selection built into the receiver of FIG. 3. FIG. 2 is a front view showing a card configuration used as station frequency information selection means. FIG. 3 is a diagram showing the front panel configuration of a receiver in which the card of FIG. 2 is used. FIG. 4 is a flowchart showing the preset channel selection operation by the microcomputer 42 of FIG. FIG. 5 is a front view showing another example of the structure of the station name display. FIG. 6 is a diagram showing a second embodiment of the present invention, and is a perspective view showing the front panel configuration of the receiver. FIG. 7 is a block diagram showing an example of a system configuration for preset channel selection built into the receiver of FIG. 6. FIG. 8 is a flowchart showing the preset channel selection operation by the microcomputer 42 of FIG. 10.52... Broadcasting station name display means (10... Card, 52... Station name display), 16.46... Receiver,
20゜50...Tuning button (channel selection means), 32...
PLL-IC (tuning means), 38... ROM (storage means), 42... microcomputer (broadcasting station assignment means,
station frequency information selection means). Applicant Yamaha Co., Ltd. Figure 8

Claims (1)

[Scope of Claims] A storage means for storing station frequency information of broadcasting stations in various regions including broadcasting stations that transmit the same broadcast content on a plurality of different frequencies, together with station name correspondence information, and
Broadcasting station assignment means for assigning a broadcasting station to be preset to each preset channel; Broadcasting station name display means for displaying the assigned broadcasting station name; Regarding each broadcasting station assigned to each channel by the broadcasting station assignment means. station frequency information selection means for selecting the most appropriate one according to the installation location and installation environment of the receiver from among the station frequency information stored in the storage means; and channel selection means for specifying a receiving channel; A receiver comprising tuning means for tuning the broadcasting station selected by the channel selection means to the frequency selected by the station frequency information selection means.