JP2913781B2 - Learning remote control transmitter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a learning remote control transmitter used for various electronic devices such as a television receiver, and more specifically, to a plurality of individual remote control transmitters. For a reconfigurable remote control transmitter that can be programmed to emulate any of the remote control signals in the transmitter, requiring less memory to store the remote control signal per key To the specified memory,
The present invention relates to a learning remote control transmitter capable of learning more remote control signals.

2. Description of the Related Art FIG. 8 to FIG. 11 show the configuration of a conventional learning remote control transmitter. The operation and configuration will be described. Reference numeral 101 denotes an emulated remote control transmitter. The light emitting unit 102 of the remote control transmitter 101 is used as the PIN of the learning remote control transmitter 111.
Learning remote control transmitter 1 placed opposite diode 112
The mode switch 125 of the eleventh mode is changed from the normal mode 126 (the mode in which the learned remote control signal is transmitted when the key 124 of the learning remote control transmitter 111 is pressed) to the learning mode 127.
The mode is switched to (a mode for learning a signal of the remote control transmitter 101 which wants to be emulated to the specific key 124 of the learning remote control transmitter 111), and the learning remote control transmitter 111 is set to the learning mode 1
The display circuit 121 confirms that the number has reached 27. after,
An optical signal 104 is transmitted from the light emitting unit 102 by pressing a key 103 of a remote control transmitter 101 to be emulated.

The transmitted optical signal 104 is the PI of the learning remote control transmitter 111.
Received by N diode 112.

The PIN diode 112 is a photoelectric conversion element that converts the optical signal 104 from the remote control transmitter 101 to be emulated during the learning mode into an electric signal. The converted electric signal faithfully amplifies the incoming signal. This is sent to preamplifier section 113.

The signal output from the preamplifier unit 113 is transmitted to the next frequency circuit 1
14 and a waveform shaping circuit 117.

First, the frequency circuit 114 is a circuit for measuring the frequency of a pulse in each burst of a pulse group (hereinafter referred to as a carrier frequency) by a frequency counter 115 inside the frequency circuit 114 in the learning mode. The carrier frequency is measured by measuring the number of clocks output from the basic clock generation circuit 123 for driving the carrier. Further, in the normal mode, the circuit is a circuit that measures in the learning mode when the key 124 of the learning remote control transmitter 111 is pressed and generates the carrier frequency simply by setting the stored carrier frequency value in the frequency counter 115.

As described above, the frequency circuit 114 measures the carrier frequency of the remote control signal from the preamplifier unit 113 in the learning mode, and the carrier frequency is output to the latch circuit 116 and latched simultaneously with the completion of the measurement.

The remote control signal output from the preamplifier unit 113 is
It enters the other circuit, a waveform shaping circuit 117 for extracting the envelope curve of the remote control signal. The signal output from the waveform shaping circuit 117 is a pulse signal from which the carrier frequency component of the remote control signal has been removed.
, The pulse widths T1H, T1L, T2H, T2L, T3H, T3L... Shown in FIG. 9 (a) are measured in order, and data of each pulse width of 2 bytes is used. As shown in (b), the data is stored in a random access memory 122 (hereinafter referred to as SRAM).

Next, a method of measuring the pulse width of the remote control signal will be described with reference to FIGS. 9 (a), (b) and (c).
A change in the envelope curve input of the remote control signal, that is, the rising edge of the pulse of the remote control signal is detected, and an interrupt 128 is applied to the microprocessor 120. afterwards,
Immediately starts counting the number of frequency-divided clocks (in this case, frequency-divided by 16) obtained by dividing the clock output from the basic clock generation circuit 123 that drives the microprocessor 120 by the frequency divider 129. Start measuring the pulse width T1H. That is, “pulse width = count number of clock”. Then, at the same time as the falling edge of the pulse, the microprocessor 120 is again interrupted 128
multiply. Immediately thereafter, microprocessor 120 stops counting the divided clock and measures the width of the measured pulse.
The data of T1H is immediately taken into the work area having a capacity of about 500 bytes in the SRAM 122 and is stored.

In addition, the data of the counter 119 of the pulse width circuit 118 is immediately cleared, and the counting of the next pulse width T1L is started. The microprocessor 120 waits for time until the next rise of the pulse T2H, or is doing other work.
At the next rising edge of the pulse T2H, the counting is stopped, and the pulse width T1 of the envelope curve in the same manner as described above.
The L data is taken into the work area of the SRAM 122. In this way, the counting is performed until the work area of the SRAM 122 becomes full, and the operation of storing the count is continued. Upon completion,
This time, the data of the carrier frequency measured by the frequency circuit 114 is taken into a predetermined area of the SRAM 122. This completes the capture of data from the remote control transmitter to be emulated.

For the following description, a portion of the remote control signal where the carrier frequency is on is called a mark, and a portion without the carrier frequency is called a space. That is, the data in which the remote control signal is taken in is written in the work area of the SRAM 122 alternately by space and 2 bytes starting from the mark.

Next, the method of compressing and registering the data taken into the work area of the SRAM 122 will be described.
The first compression of the envelope curve data of the remote control signal taken into the work area of AM122 is based on the combination of mark and space as one unit, and classified into several groups of pulse widths. 4 in group
Pulse number composed of bits (in hexadecimal notation) 1,2, ...
.. A, F,... F, and the 2-byte data stored in the work area is replaced with the pulse number.

For this purpose, first, the mark and space data taken into the work area data of the SRAM 122 are shown in FIG. 9 (c).
And re-register by replacing the data with mark, mark + space (hereinafter, “mark + space” is called a period).

Next, the method of classifying the pulse width will be described with reference to FIG. 10.Pulse width classification is performed to classify the mark and the period into several pulse numbers, and all the pulses within a certain nominal range are classified. Grouping is performed so that marks and periods are appropriately classified into a certain number, and a lower limit, an intermediate value, and an upper limit are determined.

That is, the upper limit value and the lower limit value of the mark and the period are set for each of the pulse numbers 1, 2, 3,... Used. Next, as shown in FIG. 11 (a), the data stored in the work area is compared with the upper limit value and the lower limit value, and is replaced with data of an intermediate value. , 2, 3,..., And the pulse number is set to an intermediate value which is a representative value of the 2-byte width data of the mark and the period.
FIG. 11 (b) is an explanatory diagram in which the remote control signal is represented by a pulse number. In this way, the first compression is performed by replacing the mark and space composed of each 2 bytes of the remote control signal with the pulse number composed of 4 bits.

In the next compression, the encoded remote control data, that is, the data of each key, must be further compressed.
The data must carry all the important data so that the infrared signal can be correctly reconstructed during transmission.

FIG. 12 shows the compression process. This process is also a step of eliminating code repetition in the remote control code.

As shown in FIGS. 12A and 12B, the first number is compared with the second number. If the two numbers do not match, the first two numbers and the next two numbers are compared. Compare.
And if the two numbers do not match again,
Compare the first three numbers with the next three numbers. In this way, the comparison is continued by increasing the number by one until the first half of the number stored in the work area is compared with the other half stored. If the match is still not found, the comparison is repeated from the beginning, but the first 1
The numbers are omitted, and if no match is found, the next two numbers are omitted. FIG. 12A shows a case where there is no head signal. “121213” is repeated. Therefore,
What is necessary is just to store the pulse number sequence “121213” and the fact that the leading pulse number of the repetition part is the 0th.

FIG. 1B shows a case where there is a head number. “12”
Is a head signal, and “3435” is a repetition signal. Therefore, it is only necessary to store that the pulse number sequence “123435” and the first pulse number of the repetition part are the second. As a result, the remote control data is compressed.

That is, the emulated remote control signal stored in the work area of about 500 bytes of the SRAM 122 includes the data number, the carrier frequency data, the number of types of pulse width data, the single-shot signal or the continuous signal, and the repetition number. The pulse number is converted into pulse width data or the like. In this way, the data of the captured remote control signal is compressed to a manageable storage size, and all of the data is re-decompressed to an uncompressed format to retransmit the data during emulation, Compressed data is also retained.

Thus, the learning process and the storing process are completed. These steps are common to all keys in the emulated transmitter.

Next, an outline of the operation of transmitting the emulated signal by the transmitter 111 will be described.To transmit the emulated signal, the stored code required by the transmitter is read out, decompressed, and It is necessary to send. This is done by first determining which source has been selected so that the correct data block in SRAM 122 is addressed. Then, when a key 124 is pressed, the SRAM addresses of all data blocks for that source are transferred to the microprocessor 120.
When a predetermined code is found, a predetermined data block is copied to a work area of the SRAM.

At the same time, the compressed code is expanded for remote control code duplication. Then, a start value, a length value, a value of the number of repetitions, and the like are added to the copied code. The remaining operation to be performed is to generate the required carrier frequency. This is the frequency circuit
This is performed by setting predetermined data in the frequency counter 114.

A basic clock for driving the microprocessor 120 is input to the frequency circuit 114. The number of the basic clock is counted up to the set data, and when the value becomes the same, the output of the frequency counter 115 is inverted. It has become. By repeating this operation, a carrier frequency is created.

When transmitting the expanded code, first, the output of the pulse width counter 119 is set to “H” at the start of transmission, and the first data is set in the pulse width counter 119. After that, the data is subtracted one by one. The data
When it becomes "0", the output of the pulse width counter is set to "L". Then, the next data is set in the pulse width counter. Then, the same operation as described above is repeated.

The envelope curve of the emulated remote control signal is reconstructed. By taking the carrier frequency, the envelope curve, and the AND 130, it is possible to reconstruct the remote control signal. The reconstructed remote control signal is
By driving the infrared light emitting diode 132 through the driving circuit 131, the electric signal is converted into an optical signal and transmitted to a television receiver or the like that operates with the emulated remote control transmitter, thereby receiving the television reception signal. Machine, video can work.

In this way, a reconfigurable remote control transmitter that can emulate several remote control transmitters, is easy to operate, and does not require interconnection or modification of the controlled devices is provided.

Problems to be Solved by the Invention However, in the method of learning keys as described above, SRAM is used.
If the capacity of is constant, the number of keys that can be learned is limited,
As the number of keys that can be learned is further increased, the capacity of the SRAM increases, and it becomes necessary to use an SRAM one rank higher, which raises a problem that the price increases. Further, in order to reduce the cost by reducing the microcomputer section and its peripheral circuits into one chip, it was necessary to reduce the capacity of the SRAM as much as possible.
Also, as the capacity of the SRAM increases, the number of address lines of the SRAM increases, and the design of the printed circuit board has become complicated. Therefore, an object of the present invention is to provide a learning remote control transmitter in which the amount of SRAM per key required to register a learned pulse code string is reduced.

Means for Solving the Problems In order to solve the above problems, a pulse code string which is conventional remote control data is taken into a memory in the order of reception as pulse width data of 2 bytes each, and the pulse width data is composed of 4 bits. In the learning remote control transmitter of the present invention, the pulse code train is further recompressed in order to reduce the memory registration capacity per key.

The point of recompression is that the pulse code train is composed, and the most frequently used 4-bit pulse number is represented by 1-bit data. Therefore, the pulse code constituting the remote control signal is used. In the column, pulse numbers are arranged in the order of most frequently used, and a block constituted by only the first and the most frequently used pulse numbers is defined as a data pulse block, and the data pulse block is defined as one nibble (4 Bit) or 1-byte (8-bit) data which is easy to process, and a predetermined 4-bit number is inserted before the divided block as an identifier of the divided block. Represents a group of 1-bit data, and two types of 1s constituting a divided block.
A predetermined pulse number is assigned to the data composed of bits, and the data is re-registered.

Therefore, according to the present invention, at the time of registering a remote control code, a data pulse block composed of two or less types of pulse numbers including a frequently used pulse number is determined,
The registration of the data pulse block is further divided into 8-byte units, divided into blocks, and a predetermined 4-bit pulse number is inserted before the divided block,
This divided block can be registered with two types of data composed of one bit, and therefore, the memory capacity required for registering the data pulse block can be greatly reduced, and the same memory capacity as the conventional one can be obtained. Even when the IC is used, the number of keys that can be learned can be greatly increased, and the memory use cost per key can be reduced.

Embodiment FIG. 1 explains the configuration and operation of an embodiment of a learning remote control transmitter according to the present invention with reference to FIG. 1 to FIG.
In FIG. 1, reference numeral 1 denotes a remote control transmitter to be emulated. The light-emitting unit 2 of the remote control transmitter 1 is arranged to face the PIN diode 12 of the learning remote control transmitter 11 of the present invention, and the mode changeover switch 25 of the learning remote control transmitter 11 is arranged.
From a normal mode 26 (a mode in which a learned predetermined remote control signal is transmitted when the key 24 of the learning remote control transmitter 11 is pressed) to a learning mode 27 (a mode in which a specific key 24 of the learning remote control transmitter 11 is to be emulated). Mode to learn the signal of the remote control transmitter 1)
The display circuit 21 confirms that the learning mode 11 has entered the learning mode 27. After that, the key 3 of the remote control transmitter 1 to be emulated is pressed to transmit the optical signal 4 from the light emitting unit 2.

The transmitted optical signal 4 is the PIN of the learning remote control transmitter 11.
Received by the diode 12.

The PIN diode 12 is a photoelectric conversion element that converts the optical signal 4 from the remote control transmitter 1 to be emulated during the learning mode into an electric signal. The converted electric signal faithfully amplifies the input signal. The signal is sent to the preamplifier unit 13.

The signal output from the preamplifier 13 is divided into a frequency circuit 14 and a waveform shaping circuit 17, which are the next circuits.

First, the frequency circuit 14 is a circuit that measures a frequency of a pulse in each burst of a pulse group (hereinafter, referred to as a carrier frequency as in the related art) by a frequency counter 15 inside the frequency circuit 14 in a learning mode. 15 is a basic clock generation circuit for driving the microprocessor 20
By measuring the number of clocks output from 23,
The measurement of the carrier frequency is performed. Also,
In the normal mode, when the key 24 of the learning remote control transmitter 11 is pressed, the carrier frequency is generated simply by setting the value of the carrier frequency measured and stored in the learning mode in the frequency counter 15.

In the frequency circuit 14, in the learning mode, the preamplifier 13
The carrier frequency of the remote control signal output from is measured. The carrier frequency is output to the latch circuit 16 and latched simultaneously with the completion of the measurement.

The remote control signal output from the preamplifier 13 enters a waveform shaping circuit 17 which extracts the envelope curve of the remote control signal, which is another circuit. Its waveform shaping circuit 17
Is a pulse signal from which the carrier frequency component of the remote control signal has been removed, enters the counter 19 of the next pulse width circuit 18, and has a pulse width T1H, T1 shown in FIG.
L, T2H, T2L, T3H, T3L ... are measured in order and each pulse width 2
The data is stored in a random access memory 22 (hereinafter referred to as an SRAM) in units of bytes as shown in FIG. 2B.

Next, a method for measuring the pulse width of the remote control signal will be described with reference to FIGS. 2 (a), 2 (b) and 2 (c).
A change in the envelope curve input of the remote control signal, that is, the rising edge of the pulse of the remote control signal is detected, and an interrupt 28 is issued to the microprocessor 20. Thereafter, the counter of the number of divided clocks (in this case, divided by 16) obtained by dividing the clock output from the basic clock generating circuit 23 for driving the microprocessor 20 by the frequency dividing circuit 29 is started. Then, measurement of the pulse width T1H is started. That is, “pulse width = count number of clock”. Then, at the same time as the pulse falls,
The interrupt 28 is again applied to the microprocessor 20.
Immediately thereafter, the microprocessor 20 stops counting the frequency-divided clock, and immediately captures and stores the measured pulse width T1H data in the SRAM 22 in a work area having a capacity of about 500 bytes in order. .

Further, the data of the counter 19 of the pulse width circuit 18 is immediately cleared, and the counting of the next pulse width T1L is started. The microprocessor 20 waits for time until the next pulse T2H rises, or is doing other work. The counting is stopped at the next rising edge of the pulse T2H, and the data of the pulse width T1L of the envelope curve is taken into the work area of the SRAM 22 in the same manner as described above. In this way, counting is performed until the work area of the SRAM 22 is full, and the operation of storing the count is continued. At the same time, the carrier frequency data measured by the frequency circuit 14 is
Take it into the predetermined area of AM22. This completes the capture of data from the remote control transmitter to be emulated.

For the following description, a portion where the carrier frequency is included in the remote control signal is referred to as a mark, and a portion having no carrier frequency is referred to as a space, similarly to the related art. That is, the data of the remote control signal starts from the mark and is written in the work area of the SRAM 22 alternately by space and by 2 bytes.

Next, a method of compressing the data taken in the work area of the SRAM 22 and registering the data in the memory will be described. First compression of the envelope curve data of the remote control signal taken in the work area of the SRAM 22 is performed by the mark and the space. Is regarded as one unit, and classified into several groups of pulse widths, and a pulse number composed of 4 bits in the classified pulse width group (in hexadecimal notation)
1, 2,..., A, B, C,..., E, and the data of 2 bytes stored in the work area is replaced with the pulse number.

For this purpose, first, the mark and space data taken into the work area of the SRAM 22 are converted into mark and mark + space data (hereafter, the mark + space is called a period as in the prior art) as shown in FIG. 2 (c). Replace and re-register.

Next, a method of classifying the pulse width will be described with reference to FIG.

Pulse width classification is performed to classify the above marks and periods into several pulse numbers, and group them so that all marks and periods within a certain nominal range are properly classified into a certain number. , Lower limit, intermediate value,
And an upper limit value.

That is, the upper limit value and the lower limit value of the mark and the period are set for each of the pulse numbers 1, 2, 3,... Used. Next, as shown in FIG. 4 (a), the data stored in the work area is compared with the upper limit value and the lower limit value and replaced with data of an intermediate value. , 2, 3,..., And the pulse number is set to an intermediate value which is a representative value of 2-byte width data of a mark and a period. FIG. 4B is an explanatory diagram in which the remote control signal is represented by a pulse number.

In this way, the first compression is performed for each 2
This is performed by replacing a mark or space composed of bytes with a pulse number composed of 4 bits.

In the next compression, the encoded remote control data, that is, the data of each key, must be further compressed.
The data must carry all the important data so that the infrared signal can be correctly reconstructed during transmission.

FIG. 5 shows the compression process. This process is also a process of omitting a repeated code in the remote control code. The first number is compared with the second number, and if they do not match, the first two numbers and the next two
To one number. If the two numbers do not match again, the first three numbers are compared with the next three numbers. In this way, the comparison is continued by increasing the number by one until the first half of the number stored in the work area is compared with the other half stored. If still no match is found, the comparison is repeated from the beginning, but the first number is omitted, and if no match is found, the next two numbers are omitted. FIG. 5A shows the case without a head signal. “12121212121
2 ". Therefore, the pulse number sequence" 121212121212 "and the fact that the leading pulse number of the repetition part is the 0th may be stored.

FIG. 8B shows a case where there is a head number, where "12" is a head signal and "3435" is a repetition signal. Therefore, “1
It is sufficient to store the pulse number sequence “23435” and the second pulse number at the beginning of the repetition portion. Thus, the remote control data is compressed.

With the compression up to this point, the acquired pulse width data consisting of a total of 4 bytes of 2 bytes + 2 bytes has been compressed so that it can be represented by 4 bits, but this is the same as the conventional compression means, and the present invention has The compressed remote control data (remote control code) is further compressed.

Generally, the remote control code is shown in FIG. 6 (1), (2),
As shown in (3) and the like, it is composed of about four types of blocks. That is, the head pulse block which means the start of the remote control signal, the most important data of the remote control signal,
A data pulse block which means the set operation function, a trailer pulse block which means the end of the remote control signal,
It is composed of about four types of repetitive pulse blocks which mean the repetition of the same signal as described above.

Among these blocks, the data pulse block is the most important data consisting of only two types of pulse width codes, meaning the operation function of the remote control code, and consists of a set of binary data of "1" and "0" Have been. At present, the data length of the data pulse block is increased by increasing the functions of the remote control code. The present invention is directed to compression of the data pulse block.

FIG. 7 is an explanatory diagram of a remote control code recompression method according to the present invention. In the remote control code, if the most frequently used data pulse block having a large amount of data is further compressed, the remote control code per key can be reduced. The memory registration capacity can be significantly reduced. First, a method of extracting a data pulse block of a remote control code will be described. FIG. 7A shows a pulse code sequence before data recompression according to the present invention, and this pulse code sequence is created based on the case where there is no head signal in FIG. 5A. . Each pulse width data composed of 4 bits in FIG. 7A (1, 2, and 3 are used in this figure)
Are arranged in descending order of frequency of use, and recompression processing is performed on the assumption that a block composed of only the first and second or the first and the other of the frequently used pulse width data is a data pulse block. Do.

In FIG. 7A, the most frequently used pulse number is “1”, the second is “2”, and this data pulse block is composed of the pulse numbers 1 and 2. Further, since the data pulse block is always composed of only two or less types of pulse numbers, the end of the data pulse block comes before a pulse number other than the pulse number comes.

If the data pulse block is divided into eight units, which are the data lengths most easily handled by the microcomputer used in the remote control transmitter, and the block constituted by the eight units is a divided block, FIG. ). That is, the data pulse block shown in FIG. 7 (A) is replaced by one divided block and three pulse numbers. In the divided block, the pulse numbers "1" and "2" are replaced by one bit. Is converted to data '0' and '1'.

In the data pulse block compressed as described above, since the data is divided into 1-bit divided blocks or 4-bit pulse numbers, this bit is used as a pulse block or divided block when reconstructing the remote control code. It is very difficult to determine whether In order to accurately determine the component, a predetermined 4-bit identifier indicating that the next code is a divided block is inserted before the divided block composed of a group of 1 bit. In this example, "1111"('F' in hexadecimal) is used.

 Next, a method of compressing a divided block will be described.

Paying attention to the fact that the extracted divided block is composed of two or less types of pulse width codes, it is determined in advance that two types of pulse width data are assigned to 1-bit data of "0" or "1". There is a need. That is, in this description, compression is performed by rewriting blocks by allocating 1-bit data “0” to pulse number “1” and 1-bit data “1” to pulse number “2”.

The remote control code thus compressed is represented as shown in FIG. 7 (C).

Taking advantage of this, compressing the remote control code,
The remote control code consists of a 4-bit head pulse, trailer pulse, data pulse, repetition pulse,
It is composed of an identifier and a divided block represented by a set of 1 bit.

That is, the emulated remote control signal stored in the work area of about 500 bytes of the SRAM 22 includes data number, carrier frequency data, pulse width data, type of pulse number, single-shot signal or continuous signal, and the number of repetitions. Is converted into data such as pulse width data in a block or the like and stored in a memory.

Thus, the learning process and the storing process are completed. These steps are common to all keys in the emulated transmitter.

After the transmitter 11 has been configured as desired by the user, it is necessary to read, decompress, and send the required code to utilize the transmitter. this is,
First, this is done by determining which of the keys 24 has been selected so that the correct remote control data block for the keys in the SRAM 22 is addressed. Then, when a key is pressed, the SRAM addresses of all remote control data blocks for that source are transferred to microprocessor 20. When a predetermined code is found from the code, a predetermined remote control data block is copied to the work area of the SRAM 22.

At the same time, the compressed code is expanded for remote control code duplication. The decompression method is such that the pulse width data corresponding to the pulse number constituting the compressed remote control code and the pulse number corresponding to the 1-bit data of the divided block determined by the identifier are sequentially linked. , Reproduce the pulse width data and reconstruct the original remote control code. Then, in that duplicated code,
A start value and a repetition value are added.

The remaining operation to be performed is to generate the required carrier frequency. This is performed by setting predetermined data in a frequency counter of the frequency circuit 14. A basic clock for driving the microprocessor 20 is input to the frequency circuit 14, and the number of the basic clock is counted up to the set data, and when the value becomes the same, the output of the frequency counter 15 is inverted. It has become. By repeating this operation, a carrier frequency is created.

In transmitting the expanded code, first, the output of the pulse width counter 19 is set to “H” at the start of transmission, and the first data is set in the pulse width counter 19. After that, the data is subtracted one by one. When the data of the pulse width counter becomes "0", the output of the pulse width counter is set to "L". Then, the next data is set in the pulse width counter. Then, the same operation as described above is repeated. The envelope curve of the emulated remote control signal is reconstructed.

And the carrier frequency, envelope curve and AND3
By taking 0, it is possible to reconfigure the remote control signal. In the reconfigured remote control code, a remote control signal was reconfigured by driving the infrared light emitting diode 32 through the drive circuit 31.

In this manner, a reconfigurable remote control transmitter that can emulate several remote control transmitters, is simple to operate, and does not require interconnection or modification of the controlled equipment is provided.

According to the above embodiment, a data pulse block is extracted from a pulse code sequence obtained by compressing a remote control signal, and the data pulse block is further compressed to form a divided block composed of a group of one bit. Since the pulse number of the most frequently used pulse width data can be compressed from 4 bits to 1 bit, the memory capacity required to register the learned remote control code data can be reduced. However, the number of keys that can be handled with a certain memory capacity (for example, 64 kbits) can be greatly increased.
From about 20 keys to about 30 keys, it becomes more than 40 keys, so it is possible to greatly improve functions at the same cost and if the functions are the same, since there was no general-purpose one-chip microcomputer with large memory, microcomputers and gates Array, S
A learning remote control transmitter consisting of a three-chip configuration using RAM and a dedicated IC has been replaced with a memory saving method according to the present invention, which enables a conventional general-purpose one-chip microcomputer to have the same function. Is what you do. This compression method becomes more effective as the data pulse block becomes longer.Also, the data pulse block and the trailer are alternately provided, as in a remote control with a timer reservation function for video. In the case of a different one, a plurality of pre-determined 4-bit pulse reservation numbers are provided in plurals, thereby enabling compressed registration in the same manner as described above.

According to the present invention, as is apparent from the above embodiment, when a remote control code is registered, a pulse number including a frequently used pulse number is used.
A data pulse block composed of pulse numbers of the type or less is determined, and the registration of the data pulse block is further divided into 8-byte units to form a divided block, and a predetermined 4-bit pulse number is inserted before the divided block. By doing so, it is possible to register this divided block with two types of data composed of 1 bit, and
The memory capacity required for registering the data pulse block can be greatly reduced, and the number of keys that can be learned can be greatly increased even when using an IC with the same memory capacity as the conventional one. In addition to the effect of lowering the memory use cost of the remote control signal having a long pulse code sequence that could not be learned, the work area can be widened by reducing the memory registration capacity per key, Incorporation is also possible.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a learning remote control transmitter according to the present invention, FIG. 2 (a) is an explanatory diagram of the remote control signal, and FIG.
FIG. 2B is a work area diagram illustrating a method of capturing pulse width data of a remote control signal, FIG. 2C is a work area diagram illustrating a method of reregistering the captured data, and FIG.
FIG. 4 is an explanatory diagram of a method of classifying a pulse width of a remote control signal used in the present invention. FIG. 4 (a) is an explanatory diagram of a method of registering pulse width data used in the present invention. FIG. 4 (b) is a remote control signal. Fig. 5 (A),
(B) is an explanatory diagram of a method of detecting a repetitive portion of a remote control signal used in the present invention, FIG. 6, (1), (2), (3)
Is an explanatory diagram of a typical example of blocking remote control codes, and FIG.
FIGS. 7A and 7B are diagrams for explaining a method of compressing a remote control signal according to the present invention. FIG. 7A is a diagram for explaining a state of a pulse code train before performing compression according to the present invention, and FIG. FIG. 7 (C) is a state explanatory view of a result obtained by replacing the data pulse block of (B) with a preset pulse number, and FIG. FIG. 9 (a) is an explanatory diagram of the remote control signal, FIG. 9 (b) is a work area diagram illustrating a method of decoding pulse width data of the remote control signal,
FIG. 9 (c) is a work area diagram for explaining a method of re-registering captured data, FIG. 10 is a diagram for explaining a method of classifying the pulse width of the remote control signal, and FIG. 11 (a) is used for a conventional example. FIG. 11 (b) is an explanatory diagram of a method of registering the same pulse width data, FIG. 11 (b) is an explanatory diagram showing a remote control signal by a pulse number, and FIGS. 12 (A) and (B) are diagrams of a method of detecting a repeated portion of the same remote control signal. FIG. 1 emulated remote control transmitter, 11 learning remote control transmitter, 12 PIN diode, 14 frequency circuit, 18 pulse width circuit, 20 microprocessor, 22 SRAM, 24 ……Key.

Claims (1)

(57) [Claims] A receiving means for receiving a transmission signal of a remote control transmitter to be emulated in a learning mode, a carrier frequency in each burst of a pulse group of the signal received by the receiving means, and a remote control A frequency circuit for generating a carrier frequency at the time of code reconstruction, a pulse width circuit for measuring a pulse width of each pulse of a signal received by the receiving means, and forming an envelope curve of a remote control signal at the time of remote control code reconstruction; It is connected to receive the output of the receiving means and the pulse width and frequency circuit, classifies the carrier frequency and the pulse width in each pulse burst, and applies to each pressed key on the remote control transmitter to be emulated. Microprocessor means programmed to produce corresponding compressed code; Memory means addressed by the microprocessor means for storing de,
The transmitter means controlled by the microprocessor means for transmitting a coded signal for controlling a selected remote controlled product or instrument, the microprocessor means comprising a compressed means stored in the memory means. By arranging the pulse numbers constituting the pulse train of the remote control code in the order of most frequently used, a block consisting of only the frequently used pulse number and another pulse number connected to the number is determined in a predetermined quantity unit. A learning remote control transmission characterized in that the block is recompressed with 1-bit data of 1 bit and 1 bit by placing an identifier for judging the block before the block. Machine.