JP2002084583A - Standard radio wave receiver and remote control signal receiving equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a standard radio wave receiver, capable of giving accurate time information to an equipment, irrespective of an installation of the equipment and a remote control signal receiving equipment. SOLUTION: A standard radio wave carrying a time code (standard time information) is input to a receiver 2 via a rod antenna 1. The receiver 2 selects a frequency of 40 kHz, detects a signal of the selected frequency for extracting the time code and supplies the code to a time code deciding unit 3. The unit 3 generates a minute bit string, an hour bit string and the like, and give the trains to a decoding/format converter 4. The converter 4 generates time information based on the bit strings, converts the time information to a remote control format capable of being recognized by a remote control signal receiver, and the format data is stored in a memory 5. An infrared sender 6 reads the format data from the memory and causes an infrared-emitting unit to flash, based on the format data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standard radio wave receiving apparatus and a remote control signal receiving apparatus which can generate a correct time by receiving a standard radio wave.

[0002]

2. Description of the Related Art A standard radio wave carrying standard time information (time code) is operated by the Communications Research Laboratory of the Ministry of Posts and Telecommunications. The standard wave in the long wave band is called the long wave band JJY, and is set to 40K.
The frequency is transmitted at a frequency of 1 Hz. By receiving the signal and performing detection and demodulation to extract the standard time information, an accurate Japan Standard Time can be obtained. A technique using such a standard radio wave is disclosed in Japanese Unexamined Patent Publication No. Hei 7-35879 (IPC: G04G 5/00).
Radio clocks that output a date signal are known.

On the other hand, based on time information from a built-in clock device, a video cassette for starting reception of a broadcast when a current time reaches a set time and recording a received program on a cassette tape set in advance. There is a recorder (VCR). Digital broadcast receivers that receive CS digital broadcasts also start receiving broadcasts on reserved channels when the current time reaches a set time, based on time information from a built-in clock device. You can do it.

[0004]

However, the accuracy of a clock device built in a device such as the video cassette recorder or digital broadcast receiver is not very high.
If the time error increases, the user must correct the time. Therefore, it is conceivable to incorporate a radio clock in the device (in the above-mentioned publication, a radio clock is built in the VCR). In this type of equipment, a tuner section for selecting and detecting a standard radio wave is provided in the equipment, and a type in which an antenna is fixed in the equipment or the back of the equipment, and a tuner section is provided in the equipment, and the antenna is provided outside the equipment. There is a type in which the antenna output is led out to the tuner section by an electric wire so that the antenna output has a degree of freedom of installation. However, in the former type, the installation condition of the antenna is affected by the installation of the device, and in the latter type, there is a problem that the electromagnetic noise easily gets on the electric wire. That is,
In the conventional configuration, the standard radio wave cannot be received well,
Due to electromagnetic interference from peripheral devices, decoding of the time code may not be performed, or time information as a decoding result may be incorrect. In addition, when an AV system is configured with such devices, an antenna is provided for each device, which makes connection and installation of the antenna complicated, and wastes of overlapping antennas.

[0005] In view of the above circumstances, it is an object of the present invention to provide a standard radio wave receiving apparatus and a remote control signal receiving apparatus capable of giving accurate time information to the apparatus without being affected by the installation of the apparatus.

[0006]

In order to solve the above-mentioned problems, a standard radio wave receiving apparatus according to the present invention receives a standard radio wave and extracts standard time information from the received standard radio wave. A conversion unit that converts decoded or undecoded standard time information into transmission information corresponding to a remote control format, a storage unit that stores the transmission information, and a transmission unit that reads the transmission information from the storage unit and performs remote control transmission, It is characterized by having.

[0007] Since such a standard radio wave receiver is not provided in the equipment, the installation conditions of the antenna are not affected by the installation of the equipment. Further, since the transmission information, which is the standard time information, is transmitted by remote control, it is hardly affected by noise of peripheral devices. Also, since the information is converted into transmission information corresponding to the remote control format, it is possible to port software and hardware already used in the remote control transmitter existing for the remote control signal receiving device, and to reduce the price of the standard radio wave receiving device. It is possible to suppress the rise as much as possible.

[0008] It is desirable to generate time information by adding the time from when the extraction of the standard time information is completed to the time when the remote control transmission is performed, and transmit the time information as the transmission information by remote control. It is possible to prevent a situation where the time information is delayed from the actual time by, for example, one minute.

A remote control signal receiving device according to the present invention is a remote control signal receiving device for receiving transmission information transmitted by remote control by the above-described standard radio wave receiving apparatus, and includes decoding means for decoding time information from the received information, and a built-in decoding device. And a correcting means for correcting the clock device based on the time information obtained by the decoding.

[0010] Since such a remote control signal receiving device does not include a radio clock, the installation conditions of the antenna are not affected by the installation of the device. In addition, since the transmission information, which is the standard time information, is received by the remote controller, it is hardly affected by noise of peripheral devices. Further, since transmission information corresponding to the remote control format is received, it is not necessary to separately provide a receiving unit.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to FIG.
A description will be given based on FIGS. FIG. 1 is an external perspective view showing a remote control signal receiving device and a standard radio wave receiving device.
FIG. 2 is a block diagram showing a configuration of a standard radio wave receiving apparatus, FIG. 3 is a block diagram showing a configuration of a remote control signal receiving device, and FIG. 4 is a diagram showing a relationship between standard radio wave reception and time information transmission. FIG. 5 is an explanatory diagram showing a transmission form of the remote control signal.

In FIG. 1, for example, three video cassette recorders (VCRs),
FIG. 1 shows a V monitor 21, a digital broadcast tuner 22, and a standard radio wave receiving apparatus 10 having a remote control signal transmission function. The standard radio wave receiving device 10 may function as a normal remote control transmitter for each remote control signal receiving device 20, or may be a single device having no such function. When it exists alone, there is no particular need to provide a key or the like. It is not necessary to provide a clock function for counting time.

In the block diagram shown in FIG.
1 shows a configuration of a standard radio wave receiving apparatus that processes a received signal. The standard radio wave carrying the time code (standard time information) is input to the receiving unit 2 through the bar antenna 1. Receiver 2 is 40
A frequency of KHz is selected, a time code is extracted by detecting a signal of the selected frequency, and the time code is supplied to the time code determination unit 3.

The time code judging section 3 has a pulse width of 0.
Detection of marker (M) and position marker (P0-P5) of 2s ± 5ms, pulse width of 0.8s ± 5m
s binary "0" detection and pulse width 0.5s
A binary "1" of ± 5 ms is detected. When the position marker (P0) and the marker (M) are detected consecutively, the time code determination unit 3 determines that the correct minute has arrived, and from the time when the correct minute arrives, a minute bit string (7-bit string) Output: existing between P1), hour bit string (6-bit output: existing from P1 to P2), total date bit string (10-bit output: P across P2 to P3)
4), year bit string (8-bit output: P4
To P5) and a day of the week bit string (3-bit output: exists between P5 and P0), and provides these bit strings to the decode / format converter 4.

The decoding / format conversion unit 4 generates time information based on the bit string, converts the time information into a remote control format that can be recognized by the remote control signal receiving device 20, and stores the format data in the memory 5. In the conversion into the remote control format, in order to ensure the distinction from the existing instruction code (recognition on the device 20 side), information for facilitating the distinction from these existing codes, for example, the transmission information is used. It is conceivable to add time information after the head information indicating that it is time information.

The infrared transmitting section 6 reads the format data from the memory, and blinks a light emitting section (infrared LED or the like) (not shown) based on the format data.

In the block diagram of the remote control signal receiving device 20 shown in FIG. 3, an infrared receiving section 11 receives infrared rays emitted from the standard radio wave receiving apparatus 10, converts the received infrared rays into electric signals, and supplies the electric signals to a remote control code decoding section 12. The remote control code decoding unit 12 outputs a normal remote control signal (power ON
/ OFF, recording / reproducing, channel designation, volume designation, etc.), time information is recognized based on infrared rays emitted by the standard radio wave receiver 10, and this time information is stored in the memory 13.

Clock device 1 provided in control unit 14
4a has a function of ticking itself and a function of correcting the time based on the time information given from the memory 13. The time output by the clock device 14a is given to the control unit 14, and the control unit 14
For example, when receiving an answering machine command, the clock device 1
4a is compared with a set time (stored in a memory (not shown)), and when the set time comes, a predetermined control is performed on the controlled unit.

As described above, the standard radio wave receiver 1
Since 0 is not provided in the device 20, the installation condition of the antenna 1 is not affected by the installation of the device 20. Further, since the transmission information, which is the standard time information, is transmitted by remote control, it is hardly affected by noise of peripheral devices. Further, since the information is converted into transmission information corresponding to the remote control format, software and hardware already used in the remote control transmitter existing for the remote control signal receiving device 20 can be transplanted. Price rise can be minimized. Further, since the remote control signal receiving device 20 receives transmission information corresponding to the remote control format,
There is no need to provide a separate receiving unit (hardware), and this can be dealt with by changing the remote control signal determination software.

By the way, when the standard radio wave receiving apparatus 10 recognizes the standard time (acquisition time), the actual time is advanced by almost one minute. Here, for example, if a series of processes such as decoding of standard time, format conversion, and infrared transmission are performed at 59 seconds after the acquired standard time (59 seconds after the minute), one minute is added to the standard time. The time information may be given to the device 20, or the standard time may be transmitted as it is, and the device 20 may add one minute to make the current time.

On the other hand, in the example shown in FIG. 4, assuming that the acquired standard time is 9:23, time information indicating 9:25 which is a time obtained by adding 2 minutes to the obtained standard time is represented by 9:25. The figure shows a mode in which the data is transmitted to the device 20 before the minute. In this case, various forms shown in FIG. 5 can be considered in view of the difference in the length of one cycle and the data length.

In FIG. 5A, a remote control signal having the same content (information indicating 9:25) is transmitted several times during a period of less than 1 second from 9:24:57 at each second thereafter. Sending across. On the device 20 side, the remote control signal
The clock device 14a may be corrected to 9:25 (second reset) after a certain time from the time of receiving the first time or at the time of the fourth reception. In FIG. 5B, after 9:24:57, the remote control signal is transmitted such that the end point of each second is the end of the remote control signal transmission period. In this case, at the time of the end of the third reception of the remote control signal, the device
a may be corrected at 9:25. In FIG. 5C, the remote control signal having a length of one second is transmitted three times after 9:24:57. In this case, on the device 20 side, the clock device 14a may be corrected to 9:25 at the end of the third reception of the remote control signal. When the same information cannot be received in the plurality of times of receiving the remote control signal, a process may be performed in which the time information is not used.

In the above embodiment, the decoded contents are converted into the remote control format and transmitted by remote control. However, the bit string before decoding may be converted into the remote control format and transmitted by remote control. Also, the time code determination unit 3 and the decode / format conversion unit 4 of the standard radio wave receiving apparatus 10 shown in FIG.
The remote control code decoding unit 12 of the device 20 shown in FIG.
It may be configured by software or hardware.

[0024]

As described above, according to the present invention, the installation conditions of the antenna are not affected by the installation of the device, and the influence of noise of peripheral devices can be reduced. Further, software and hardware already used in the remote control transmitter for the remote control signal receiving device can be transplanted, and the price increase of the standard radio wave receiving device and the remote control signal receiving device can be suppressed as much as possible. In addition, when an AV system or the like is provided with a plurality of remote control signal receiving devices, it is possible to eliminate the complexity of antenna connection and installation, the waste of antenna duplication, and the like.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a remote control signal receiving device and a standard radio wave receiving device of the present invention.

FIG. 2 is a block diagram showing a configuration of a standard radio wave receiving apparatus according to the present invention.

FIG. 3 is a block diagram showing a configuration of a remote control signal receiving device of the present invention.

FIG. 4 is an explanatory diagram showing a relationship between standard radio wave reception and time information transmission according to the present invention.

FIGS. 5A to 5C are explanatory diagrams each showing a form of transmitting a remote control signal according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 bar antenna 2 reception unit 3 time code determination unit 4 decode / format conversion unit 5 memory 6 infrared transmission unit 10 standard radio wave reception device 11 infrared reception unit 12 remote control code decode unit 13 memory 14 control unit 15 clock device 20 remote control signal reception device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F002 AA00 AC01 BA26 BB05 FA16 GA06 5K047 AA03 AA18 BB02 MM12 5K048 BA04 DB01 DB04 DC01 EA14 EB11 HA04 HA06 5K061 BB00 BB19 EF06 FF01 GG11 JJ07 JJ19 JJ19

Claims (3)

[Claims] 1. A standard radio wave receiving apparatus for receiving a standard radio wave and extracting standard time information from the received standard radio wave, converts the decoded or undecoded standard time information into transmission information corresponding to a remote control format. A standard radio wave receiving apparatus comprising: a conversion unit; a storage unit for storing transmission information; and a transmission unit for reading transmission information from the storage unit and transmitting the remote control by remote control. 2. The standard radio wave receiving apparatus according to claim 1, wherein time information is generated by adding a time from when the extraction of the standard time information is completed to when the remote control transmission is performed, and the time information is generated as transmission information. A standard radio wave receiving device for transmitting. 3. A remote control signal receiving apparatus for receiving transmission information transmitted by remote control by the standard radio wave receiving apparatus according to claim 1 or 2, wherein a decoding means for decoding time information from the received information, and a built-in decoding means. A remote control signal receiving device comprising: a correction unit configured to correct a clock device based on time information obtained by the decoding.