KR100278376B1 - Interface device for communication between audio and computer - Google Patents

Abstract

The data link code is transmitted / received to / from the computer's serial port via the interface using the data link as a communication means of audio and computer, so that the user can control the overall operation of the audio with the computer, The present invention relates to an interface device for communication between an audio and a computer so that a user can easily recognize the audio signal through a computer monitor. The interface device encodes a serial signal of the computer and converts it into a data link signal that can be recognized by audio. And various types of audio devices are controlled according to a command signal according to a computer operation of the user. In addition, the audio data is transmitted to the audio device through a data link signal Audi users The user can control the overall operation of the audio by using only the computer, and the multimedia environment can be realized.

Description

Interface device for communication between audio and computer

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an interface device for communication between audio and a computer, and more particularly, The present invention relates to an interface device for communication between an audio and a computer, in which not only the overall operation of audio can be controlled but also the state of audio according to each control operation can be easily recognized by a user through a computer monitor.

Generally, audio is composed of an amplifier, a compact disk drive, a tuner, a deck, etc., and outputs various audio signals according to a user's operation.

In addition, there is now a device that can view not only voice signals but also images corresponding thereto.

Under these circumstances, with the increasing use of computers, multimedia that integrates various mass media and home appliances centered on computers has become a major issue.

In this regard, many efforts have been made to connect audio and computers in the easiest and most compatible way with existing audio, and Sharp in Japan has developed a network component that can edit music on the Internet into mini-components.

In addition, a device has been developed to connect a sound card portion of a computer to an external device (AUX) terminal of an audio device so as to be able to listen to audio signals output from a computer through an audio speaker.

Although the conventional apparatus described above can perform some functions of audio through a computer, it is inconvenient for the user to operate the computer and the audio respectively because the user can not control the overall operation of the audio using the computer there was.

It is an object of the present invention to provide a method and apparatus for transmitting and receiving a data link code to and from a serial port of a computer through an interface using a data link as a communication means of audio and a computer, Not only the overall operation can be controlled but also the state of the audio according to each control operation can be easily recognized by the user through the computer monitor so that the user can control the overall operation of the audio only by the computer to realize a complete multimedia environment And an interface device for communication between audio and a computer.

According to an aspect of the present invention, there is provided a computer-readable recording medium on which a computer-readable recording medium storing a computer- And various devices of the audio are controlled according to a command signal according to a computer operation of the user including the interfacing means and the data link signal of the audio according to each control operation is displayed on the computer so that the user can know the operation state of the audio And the like.

FIG. 1 is a block diagram showing an embodiment of an interface device for communication between audio and a computer according to the present invention.

2 is a signal waveform diagram showing the format of the waveform of the data link.

3 is a diagram showing a data format of a data link,

4 is a diagram showing a key command data format sent from the computer to audio,

5 is a diagram showing a data format of a message display mode sent from an audio to a computer,

6 is a diagram showing a data format of a time display mode to be transmitted from an audio to a computer,

7 is a diagram showing a data format of a volume display mode which is transmitted from an audio to a computer,

8 is a diagram showing a data format of a tuner display mode transmitted from an audio to a computer,

9 is a diagram showing a data format of a tape display mode sent from an audio to a computer,

10 is a diagram showing a data format of a compact disc player splay mode to be transmitted from audio to a computer,

11 is a diagram showing a data format of a video display mode to be transmitted from an audio to a computer.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1, an interface device for communication between audio and a computer according to the present invention includes a data link input / output unit 10, a CPU 20, a buffer 30, a ROM 40, a RAM 50, And a data input / output unit 60.

The data link input / output unit 10 includes a resistor R11 having one end connected to the audio link input / output port of the audio, a reverse diode D14 connected in parallel to the resistor R11, A diode D11 connected in parallel to the anode terminal and grounded at the anode terminal and a diode D11 connected to the power supply terminal Vcc at the cathode terminal and a diode D11 connected to the connection point between the resistor R11 and the diodes D11, (11) connected in parallel to the voltage-dividing resistor (R12), and an output terminal connected to the output terminal of the first inverter (11). The voltage-dividing resistor (R12) A fourth inverter 14 having an output terminal connected to the anode terminal of the diode D13, and a second inverter 14 connected to the anode terminal of the diode D13. The data input terminal 10 ' , One end connected to the input terminal of the fourth inverter (14) and the other end connected to the power terminal (Vcc And a data link output unit 10 " comprising a voltage-dividing resistor R13 connected to the voltage-dividing resistor R13 and a third inverter 13 having an output terminal connected to the voltage-dividing resistor R13.

The CPU 20 is connected to the serial input / output port ( R _XD , T _XD And the interrupt 0 port INT0 is connected to the data link input unit 10 'of the data link input / output unit 10 through the first inverter 11 and the second inverter 11' And the data output ports P1.0 and P1.1 are connected to the output terminal of the second inverter 12 and the input terminal of the third inverter 13 respectively, When an input occurs, interrupt 0 (INT 0) is enabled and input to data port (P1.0). When data link is output, interrupt 0 (INT 0) is disabled and output to data port , The ASCII characters received from the computer are converted into data link codes and transmitted as audio data, and the data link codes sent from the audio are converted into ASCII characters and transmitted to the computer.

The buffer 30 comprises a queue having a data structure of first-in-first-out (I / O) buffers for buffering when the communication line is busy. The buffer 30 buffers a signal of the CPU 20 and outputs it in stages.

The ROM 40 stores various signal data for the operation algorithm of the CPU 20 and the mutual conversion of the data link code and the ASCII character.

The RAM 50 temporarily stores various data according to the calculation process of the CPU 20.

The serial data input / output unit 60 is connected to the serial output port of the CPU 20 T _XD A line driver 61 connected to the input terminal of the CPU 20, R _XD A line receiver 62 having an output terminal connected to one end of the line driver 61 and an input terminal connected to the other end of the line receiver 62, And a connector 63 connected to one end and connected to the computer, and performs serial communication between the CPU 20 and the computer.

The interface device for communication between the audio and the computer according to the present invention will be described in detail with reference to the accompanying drawings.

The user connects the computer to the connector 63 of the serial data input / output unit 60 to perform a general control of the audio through the computer, and sends a system connection request signal to the line receipt 62 of the serial data input / The CPU 20 transmits the serial data to the serial data input port ( R _XD To the RAM 50 via the data link output queue, which is the buffer 30, in accordance with the algorithm set in the ROM 40. [

Thereafter, the CPU 20 encodes the serial data, which is a system connection request signal stored in the RAM 50, according to the data set in the ROM 40 and encodes the encoded data link code into the interrupt 0 port INT 0 Through the output port P1.1 in a state in which it is disabled.

The data link output queue, which is the buffer 30, sequentially receives serial data when it is received and continuously transmits the data until the queue is empty. That is, the input routine fills the queue, and the output routine leaves the queue one by one This makes it possible to securely transmit a transmission signal even when the line is busy, and has a data structure of first-in-first-out.

The data link code of the system connection request signal transmitted from the CPU 20 is applied to the audio through the data link output unit 10 " of the data link input / output unit 10. [

In this case, the input signal may be represented by the output signal, but this is prevented by the reverse diode D14 of the data link input 10 '.

At this time, when the system is connected and the audio amplifier outputs the system connection data link code through the data link input unit 10 'of the data link input / output unit 10, the interrupt 0 port (INT 0) of the CPU 20 is And receives the data link code to the data output port P1.0 at this time.

The CPU 20 then stores the received system connection data link code in the RAM 50 via the buffer 30 according to the algorithm set in the ROM 40 and then transmits the data link code stored in the RAM 50 ROM 40 into serial data in the form of ASCII characters and outputs the decoded data to the serial data output port T _XD ).

The system connection serial data output from the above is applied to the computer through the line drive 61 of the serial data input / output unit 60.

At the same time, when the computer receives the system connection signal, the computer outputs a status transmission request signal for each of the amplifier, the compact disk player, the deck and the tuner, and transmits the status transmission request signal through the line receipt 62 of the serial data input / do.

Then, the CPU 20 transmits the status transmission request serial data transmitted from the above to the serial input port ( R _XD And stores it in the RAM 50 via the buffer 30 in accordance with the algorithm set in the ROM 40. [

Thereafter, the CPU 20 encodes the status transfer request serial data stored in the RAM 50 into the status transfer request data link code in accordance with the data set in the ROM 40, and determines whether the interrupt 0 port (INT0) is disabled Output through the data output port P1.1.

Then, the audio receives the status transmission request data link code through the data link output unit 10 " of the data link input / output unit 10. [

At this time, each device of the audio amplifier, the compact disc player, the deck, and the tuner transmits a status transmission code signal to the CPU 20 via the data link input unit 10 'of the data link input / Enable port 0 (INT 0) and apply it to output port (P1.0).

Then, the CPU 20 stores the status transmission data link code in the RAM 50 according to the algorithm set in the ROM 40, and stores the stored status transmission data link code in an ASCII character format according to the data set in the ROM 40 Decodes it into serial data and outputs it to the serial output port ( T _XD ).

When the status transmission serial data output from the above is applied to the computer through the line drive 61 of the serial data input and output unit 60 and the reception of the status transmission signal is completed, Signals are sent to complete the connection of the system.

If there is a status transmission request for each device until a system status transmission completion signal is received after each device of audio has received a system connection preparation request, only the corresponding device responds, and the remaining devices do not use an integral data link line So that the stable transmission of the signal is achieved.

In addition, when the audio is in the initial state, the contents of the status transmission code for each device transmitted after the start of the status transmission are the total number of tracks of the compact disk, the total time, the input of the compact disk, A tuner frequency and preset information, a tape deck input, a deck selection signal, a tape counter signal, and an amplifier function code. When the audio is in operation, the track and time of the compact disk drive, A counter and deck selection signal, an amplifier function code, and a failure code.

In the above, the failure code is a code generated when a control signal is inputted by a tact switch of a remote controller or an audio other than a computer.

As shown in FIG. 2, the signal waveform of the data link includes a 1-bit transmission start command, an 8-bit data signal, and a 1-bit transmission termination command. The sampling clock is an inverse number of the communication speed, It is used at TTL level without sending / receiving drive.

As shown in FIG. 3, the format of the data is composed of a header consisting of a 1-byte transmission start code and an address code, a data code capable of varying the length, and a 1-byte check data code. The upper 4 bits of the address are the unique number of the originating device, and the lower 4 bits are the unique number of the receiving device.

The transmission start code is 0xfe, and the check data code transmits only the lower 8 bits of the sum of the header and the data.

In this case, the transmission start code and the check data code may be determined differently depending on the case.

In addition, each device checks whether a data line is empty for a predetermined period of time before writing data to the data line

Table 1 below shows the unique numbers of the respective devices.

Table 1. Device number

device waiting time Unique number Amp 5msec 0x2 CD Key 30msec 0x3 CD 30msec 0x4 PC 15msec 0x5 PC DATA 15msec 0x6

In Table 1, for example, the address code for signal transmission from the amplifier to the computer is 0x25.

After the initialization of the system according to the connection of the computer is performed by the above operation, the user inputs a predetermined signal for controlling each device of the audio through the computer through the line receipt 62 of the serial data input / The CPU 20 transmits the serial data to the serial data input port ( R _XD And stores the received serial data in the RAM 50 through the buffer 30.

Then, according to the data set in the ROM 40, the CPU 20 transmits serial data for audio operation control stored in the RAM 50, as shown in FIG. 4, the transmission start code of 1 byte is 0xfe, Is 0x52 and is decoded by a data link code consisting of 1 byte of data code and check data information of 1 byte and outputted through the data output port P1.1.

Then, the audio amplifier receives the data link code output from the CPU 20 through the data link output unit 10 " of the data link input / output unit 10 and controls the operation accordingly.

Table 2 shows the command data keys transmitted from the computer to the audio.

Table 2. Key list

Key Justice division Key Justice division 0x00 0 key remote control 0x01 1 key remote control 0x02 2 key remote control 0x03 3 key remote control 0x04 4 key remote control 0x05 5 key remote control 0x06 6 key remote control 0x07 7 key remote control 0x08 8 key remote control 0x09 9 key remote control 0x0a 전력 키 remote control 0x0b sleep key remote control 0x0c 클크 키 remote control 0x0d P - scan key remote control 0x0e memo / set key remote control 0x0f eq key remote control 0x10 display key remote control 0x11 timer key remote control 0x12 surround key remote control 0x13 stop key remote control 0x14 play / pause key remote control 0x15 << key remote control 0x16 >> key remote control 0x17 dolby key remote control

Key Justice division Key Justice division 0x18 rev-mode key remote control 0x19 cd-sync key remote control 0x1a 레코드 키 remote control 0x1b reserved remote control 0x1c reserved remote control 0x1d intro key remote control 0x1e random key remote control 0x1f reserved remote control 0x20 reserved remote control 0x21 repeat 1 / all key remote control 0x22 repeat a / b key remote control 0x23 edit key remote control 0x24 t-size key remote control 0x25 prog / rev key remote control 0x26 cd-시간 키 remote control 0x27 tuner key remote control 0x28 cd key remote control 0x29 테이프 키 remote control 0x2a Video key remote control 0x2b mute key remote control 0x2c Volume up key remote control 0x2d Volume down key remote control 0x2e clock long key remote control 0x2f time long key remote control 0x30 stop long key remote control 0x31 << long key remote control 0x32 << long key off remote control 0x33 >> long key remote control 0x34 >> lomg key off remote control 0x35 전력 키 main body 0x36 cd open / close key main body 0x37 tape open / close key main body 0x38 fm / page mode key main body 0x39 Tuner mode, 1 / all main body 0x3a Band A / B main body 0x3b Memo / Set main body 0x3c | << key main body 0x3d >> | key main body 0x3e rec key main body 0x3f cd> / || key main body 0x40 stop key main body 0x41 deck ◇ key main body 0x42 surround key main body 0x43 Input Key main body 0x44 volume up key main body 0x45 volume down key main body 0x46 << long key main body 0x47 | << long key off main body 0x48 >> | long key main body 0x49 >> | long key off main body 0x4a stop long key main body 0x4b power-ON key 시스템 키 0x4c power OFF key 시스템 키 0x4d Request retransmission of dislay 시스템 키 0x4e reserved reserved 0x4f 0 key pc tuner key 0x50 1 key pc tuner key 0x51 2 key pc tuner key 0x52 3 key pc tuner key 0x53 4 key pc tuner key 0x54 5 key pc tuner key 0x55 6 key pc tuner key 0x56 7 key pc tuner key 0x57 8 key pc tuner key 0x58 9 key pc tuner key 0x59 Band Key pc tuner key

Key Justice division Key Justice division 0x5a FM mode key pc tuner key 0x5b tuning up key pc tuner key 0x5c tuning down key pc tuner key 0x5d tuning up long key pc tuner key 0x5e set key pc tuner key 0x5f tuning down long key pc tuner key 0x60 0 key pc cd key 0x61 1 key pc cd key 0x62 2 key pc cd key 0x63 3 key pc cd key 0x64 4 key pc cd key 0x65 5 key pc cd key 0x66 6 key pc cd key 0x67 7 key pc cd key 0x68 8 key pc cd key 0x69 9 key pc cd key 0x6a page key pc cd key 0x6b set key pc cd key 0x6c play / pause key pc cd key 0x6d stop key pc cd key 0x6e << key pc cd key 0x6f >> key pc cd key 0x70 stop long key pc cd key 0x71 << long key pc cd key 0x72 << long key off pc cd key 0x73 >> long key pc cd key 0x74 >> long key off pc cd key 0x75 <Play key pc tape key 0x76 > Play key pc tape key 0x77 << key pc tape key 0x78 >> key pc tape key 0x79 stop key pc tape key 0x7a Up / Down key off remote control 0x7b Preset key pc Tuner key

Then, according to the command data code, the audio controls the operation of each device and outputs a display command signal for allowing the user to know the state of the controlled device.

The method of transmitting display data from the audio data is performed only when the display data is different from the previous data. The display data of the compact disc player is sent to the audio amplifier, and the display data of the receiver is transmitted to the computer.

Then, when the CPU 20 transmits the display signal to the computer by the above-described method, the computer displays the operation process of each device and the state of each device so that the user can know the state of each device.

As shown in FIG. 5, the data format of the message display mode transmitted by audio is composed of 1 byte of transmission start code, 1 byte of address, 9 bytes of data code, and 1 byte of check data code to display various information messages according to the operation of the audio I will.

The contents of msg in the data code in FIG. 5 are shown in Table 3 below.

Table 3. msg Contents

msg display msg display 0x00 Display off 0x01 "Hello" Display 0x02 "Bye" display 0x03 "Pop" 0x04 "Rock" 0x05 "Classic" 0x06 "Flat" 0x07 "SRS On" 0x08 "Movie" 0x09 "Simulated" 0x0a "Music" 0x0b "Surround off" 0x0b "SRS off" 0x0d "Deck Open" 0x0d "Deck Close" 0x0f "No Tape" 0x10 "Mute"

The contents of flag0, flag1, and flag2 are shown in Table 4 below.

Table 4. Contents of flag0, flag1, flag2

beat flag0 beat flag1 beat flag2 7 "CD SYNC" 7 "MEMO" 7 "(" 6 "REC" 6 "AUTO" 6 "=" 5 "DOLBY B" 5 "PRESET" 5 ")" 4 "T / PLAY" 4 "STEREO" 4 "▷ ▶" 3 "T / REC" 3 "TUNED" 3 "▶" 2 "SLEEP" 2 "Deck Open" 2 "||" One "SRS" One "No Tape" One "◀ ◁" 0 "SURROUND" 0 "Deck Close" 0 "◀"

The contents of p_disp1 and p_disp2 display the tape count and program in the form shown in Table 6 below.

The time display mode is also configured as a 12-byte data format as shown in FIG.

6, the contents of t_flag are shown in Table 5 below.

Table 5. Contents of t_flag

beat display beat display beat display beat display 7 reserved 6 reserved 5 "Sleep" 4 "ON TIME" 3 "OFF TIME" 2 "AM" One "PM" 0 ":"

The hour and min displays are shown in Table 6 below.

Table 6. hour, min display

Nibble display Nibble display Nibble display Nibble display 0x0 "0" 0x1 "One" ... ... 0x9 "9" 0xa "A" 0xb "B" 0xc "C" 0xd "P" 0xe "-" 0xf "" (Off)

According to Table 6, for example, when the hour, min code is hour = 0xf3, min = 0xee, and ":" flag = ON, the time displayed on the computer becomes "3: -".

The data format of the volume display mode is configured as shown in FIG. 7, and vol is binary data representing the volume magnitude.

Data indicating the display mode of the audio tuner is configured as shown in FIG. 8, and the contents of the band are shown in Table 7 below.

Table 7. band Contents

band Justice band Justice band Justice band Justice 0x0a "" 0x0b "FM" 0x0c "AM" 0x0d "MW" 0x0e "LW"

Also, the contents of f_disp1 and f_disp2 are as shown in Table 6 and display the frequency of the tuner.

For example, when f_disp = 0x23 and f_disp = 0x45, "2345Khz" is displayed when the band is AM or LW, and "23.45Mhz" is displayed when FM is FM.

In the above, the decimal point and Khz / Mhz are automatically displayed according to the content of the band, and if f_disp1 = 0x, "1" is automatically added in front.

The contents of the preset indicate the preset number set in the tuner.

Other tapes, compact disc players. Video, and the like are configured as shown in FIGS. 9, 10, and 11, respectively, and the operation and status of each device are displayed by the above table.

As described above, according to the present invention, a data link code is transmitted / received to / from a serial port of a computer through an interface using a data link as a communication means of audio and a computer, so that a user can control the overall operation of audio with a computer, So that the user can easily control the overall operation of the audio by using only the computer, thereby realizing a complete multimedia environment.

Claims (6)

A data link input / output unit for transmitting / receiving data between the audio and the computer by decoding the signal input through the data link from the audio to the computer; A serial data input / output unit that encodes various signals input through the serial communication from the computer and transmits / receives the signals to / from the audio; And control means for receiving the signals of the data link input / output unit and the serial data input / output unit, converting the signals according to the set program and various data, and transmitting and receiving the signals through the data link input / output unit and the serial data input / And an interface device for communication between the audio and the computer. The data link input / output unit of claim 1, wherein the data link input / output unit comprises: a resistor R11 having one end connected to a DAC input / output port of audio; a reverse diode D14 connected in parallel to the resistor R11; A diode D11 connected in parallel to one end of the diode R11 and having an anode terminal connected to ground and a diode D11 having a cathode terminal connected to the power supply terminal Vcc and a diode D11 connected between the resistor R11 and the diode D11, A first inverter 11 whose input end is connected in parallel to the voltage-dividing resistor R12; an input terminal connected to the output terminal of the first inverter 11; Data link receiving means formed of a connected second inverter (12); A diode D13 connected to the data link input / output port, a fourth inverter 14 having an output terminal connected to the anode terminal of the diode D13, and a second inverter 14 connected to the input terminal of the fourth inverter 14, And a data link transmitting means comprising a voltage-dividing resistor R13 connected to the power supply terminal Vcc and a third inverter 13 having an output terminal connected to the voltage-dividing resistor R13. Lt; / RTI &gt; The system of claim 1, wherein the serial data input / output unit comprises: a line driver for receiving data of the CPU and transmitting the serial data to a computer; And a line receiver for receiving the data signal of the computer and transmitting the data signal to the CPU through serial communication. 2. The apparatus of claim 1, wherein the control means comprises: a ROM storing various control algorithms and various data for signal conversion; A CPU for performing signal transmission and reception and signal conversion according to an algorithm and data set in the ROM; And a RAM for temporarily storing various input signals and signal-converted signals received by the CPU. The system according to claim 3 or 4, wherein the CPU comprises: an Intel-based 8031 chip having a serial input / output port; An interrupt 0 port INT0 is connected to a connection point between the first inverter 11 and the second inverter 12 of the data link receiving means and the data input port P1.0 and the data output port P1.1 are connected, Each of which is connected to the output terminal of the second inverter 12 and the input terminal of the third inverter 13 and is input to the data port P1.0 by enabling the interrupt 0 (INT 0) (INT 0) is disabled and the data port (P1.1) is output at the time of data link output. The interface device of claim 7, wherein the control means further comprises a buffer consisting of a queue having a first-in-first-out data structure in case the communication line is busy.

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