JPS6155290B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic memory for a receiver having an automatic music selection function.

At least in Western Europe and the United States, FM broadcast stations can be broadly classified according to their broadcast content. For example, in Western Europe, each region has programs 1 to 3.
There are several broadcast stations, and in the United States, they are characterized by the genre of broadcast content (for example, Country & Country).
Western, Jazz, Rock, etc.), and listeners generally select and listen to the broadcasting station that matches their tastes.

Conventionally, this selection has been made by the listener tuning a receiver and checking the broadcast content with his or her own ears. Also, receivers with memory devices, such as car radios, allow users to store their favorite stations in memory. However, the service area for each station is limited, and it is necessary to reselect the station each time you leave a service area, such as when traveling by car. In order to eliminate this troublesome tuning operation, in-vehicle radios are being put into practical use that store multiple stations in one classification and are configured to continue receiving the strongest station. In advance, it is necessary to selectively store stations according to the travel course in memory using a frequency table, etc., and the capacity of this memory is limited. Especially when traveling, you may not know the frequency in a completely unfamiliar place. It's still inconvenient. It would seem good to store tuning data from all regions in memory, but the problem is how to select this memory group, which is not very practical.

The present invention has been made in view of the above points. In particular, as receivers that can select memory groups become more widespread in the future, it is assumed that each broadcasting station will combine and transmit a broadcast classification identification signal that can characterize its own broadcast content with the broadcast signal. In order to realize the function of automatically distinguishing broadcast contents and classifying them into memory with an effective and inexpensive circuit configuration in a receiver capable of group selection, it is necessary to It is easy to think of a method for superimposing a signal on a broadcast signal, and it is very easy to select this identification signal so that it does not interfere with conventional broadcast reception within the band occupied by the broadcast wave. If several types of broadcast content identification signals are determined for each country in this way, a receiver that requires almost no channel selection operation can be realized, which would have a very large effect.

In the present invention, a memory device capable of multiple classifications is provided, and the reception band is scanned during channel selection, and for stations with good reception conditions, the memory device is stored in accordance with the broadcast identification classification signal included in the demodulated output. It is characterized by being able to automatically store data according to classification signals. If you do this,
For example, when selecting a broadcasting station in one category, the system periodically interrupts the audio for a very short period of time while receiving stations in that category with good reception, and scans each station one by one to find stations in the same category. It is possible to continue searching,
If the search time for other stations is made very short, the listening condition of the station being received will not be affected, and this is possible with conventional technology, for example, several ms to 10 ms at intervals of 0.5 seconds or more It is known that even if audio is interrupted, there is almost no problem in receiving normal broadcast waves. That is, it is only necessary to maintain the receiving state of other stations for these few milliseconds and to discriminate the identification signal, which is easy.

Now, during reception, while scanning, it is also possible to search for the station with the best reception status among the stations stored in the same category by periodically interrupting the sound for a very short time, as described above. This is possible by comparing the reception level of the station being received and the reception level during station searching. This operation of searching for new stations,
If the operation of searching for good stations in the same memory group is performed in parallel, for example alternately, the listener can simply select the broadcast classification and everything else will be automatically classified into the same classification. Moreover, it is possible to realize a receiver that can always continue to receive the station with the best reception condition. Radios with this configuration are extremely innovative, especially when installed in a car, and require almost no tuning operation, making it possible to always receive the optimal station even when driving to a completely unknown place. It can be said to be an ideal receiver.

An embodiment of the present invention will be described with reference to the drawings.

The antenna 1 is connected to the tuner 2 and a signal is supplied to the tuner 2. A part of the output of tuner 2 is sent to broadcast classification identification circuit 7 and reception level judgment circuit 8.
guided by. The broadcast classification identification circuit 7 detects a broadcast classification identification signal included in the demodulated output, and supplies an output corresponding to the signal to the control unit 11 in the form of, for example, a digital code. The reception level determination circuit 8 determines the reception level step by step and supplies it to the control unit 11 in the form of, for example, a digital code. The tuner 2 is tuned by the output of a tuning voltage generating circuit 6, and the output of the tuner 2 is guided to a speaker 5 via a muting circuit 3 and a low frequency amplifier 4. The tuning voltage generation circuit 6 is
The output is fixed by tuning data from the memory device 10 or the control unit 11.
This consists of, for example, a PLL synthesizer. The memory device 10 is allocated according to broadcast classification, in this example 100, 200, 3
There are three types of memory classification: 00. The channel selection device 9 has broadcast classification selection keys 91 to 93 for selecting this memory classification, and 91 corresponds to memory classification 100, 92 corresponds to 200, and 93 corresponds to 300, respectively.
It corresponds to Memory classifications 100 to 300 have data areas 101 to 109, 201 to 20.
9,301 to 309, and in this example, nine pieces of tuning data can be stored each.
Now, when the listener selects, for example, the broadcast classification selection key 91, the control unit 11 selects, for example, the tuning data in the data area 101 as arbitrary tuning data stored in the memory classification 100 in the memory 10. The tuner 2 tunes to the frequency based on this tuning data and starts reception. This reception level is input into the control unit 11 from time to time via the reception level determination circuit 8 and is monitored. In addition, the control section 1
No. 1 interrupts audio for a very short time at an appropriate period, for example, every second, and temporarily receives stations other than the station currently being received. This reception is performed by sending a control signal from the control section 11 to the muting circuit 3, but stations other than those currently receiving the tuning data are sent alternately from both the memory section 10 and the control section 11. based on. Data of other data areas belonging to the same memory classification 100 is sent from the memory section 10, and tuning data is sent from the control section at frequency steps corresponding to the inter-station space to be scanned within the band. First, the control unit 11 performs the following operation in the case of data sequentially sent from the memory classification 100. That is, as shown in the flowchart of FIG. 2, after the station is switched, the output of the reception level determination circuit 8 is taken in, and this reception level is compared with the reception level of the station currently being monitored. As a result of the comparison, if the reception level after switching is higher, switching is made to this station, and the original receiving station is stored in the memory classification 100. Conversely, if this is low, if the received level is above a certain specified level, it is stored in the memory classification 100 again, but if it is below a certain specified level, it is removed from the memory classification 100. The specified level here is, for example, an absolute level such as a receivable level. Next, when the tuning data is received from the control section 11, the following operation is performed. That is, as shown in the flowchart of FIG. 3, when the band is sequentially scanned and the output of the reception level judgment circuit 8 is tuned to a station whose output is above a certain specified level, the output of the broadcast classification identification circuit 7 is It is taken into the control section 11. Now, the reception immediately returns to the original station, but in this case the control section stores the tuning data of this station in the memory device 10 according to this broadcast classification. For example, if this station is a broadcasting station with the same classification as memory classification 100, 101
This tuning data is stored in a vacant data area of .about.109. If the data area is not empty and there is a station whose reception level is lower than that of the search station, the tuning data of this station may be removed and stored. In this way, the band is constantly scanned (in this example, this scan is periodic, such as one station per second, and is performed within an extremely short period of time that does not interfere with the reception of the station being received. By storing receivable stations in the same classification one after another, it is possible for the listener to continue selectively listening to the station with the best reception level in the memory. By simply selecting this broadcast classification, it is possible to continue receiving the stations with the best reception level within that classification.

As described above, according to the present invention, as long as a broadcasting classification is selected, it is possible to continue receiving stations with good reception levels among the stations belonging to that classification, and the trouble of conventionally having to memorize each station can be avoided. totally unnecessary,
The memory is sequentially rewritten to stations with good reception levels, which is very convenient especially for a car radio, and the driver can simply select which broadcast category to select. If there is no need to select broadcasts of different classifications, no operation is required at all, and an extremely safe receiver can be realized.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIGS. 2 and 3 are flowcharts for explaining the functions of the control section 11. FIG. DESCRIPTION OF SYMBOLS 1... Antenna, 2... Tuner, 3... Tuning circuit, 4... Low frequency amplifier, 5... Speaker, 6... Tuning voltage generation circuit, 7...
Broadcast classification identification circuit, 8... Reception level judgment circuit,
9...Tuition selection device, 10...Memory device, 11...
...control section.

Claims (1)

[Claims] 1. A tuner that receives a broadcast signal to which a broadcast content classification identification signal is added, a tuning voltage generation circuit that tunes the tuner to a predetermined frequency, and a predetermined tuner that performs predetermined tuning from a data area group classified in memory according to the identification signal. A memory device that sets data to the tuning voltage generation circuit, a tuning device that selects a data area group of the memory device, a determination circuit that determines the reception level of the reception signal of the tuner, and the identification signal from the reception signal of the tuner. furthermore, sequentially generates tuning data that scans within the reception band, temporarily switches this scanning tuning data with tuning data from the memory device, and sets it in the tuning voltage generation circuit. death,
When the determination circuit indicates a receivable level for the reception signal received at that time, the scanning tuning data is selected by the channel selection device into the corresponding data area of the memory device according to the identification signal from the identification circuit. A receiver equipped with a control unit that can be stored in groups.