JP2624863B2 - Channel unit registration method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for registering a channel unit of an audio system, and particularly to a unit for controlling a unit (amplifier, speaker, etc.) of each channel via a bus by a controller. How to register how many channels are for.

<Prior Art> There is a system in which a controller and a plurality of units are connected to one bus, and data is exchanged between the controller and each unit via the bus. In such a system, the controller designates a destination unit by address and sends data, and the addressed unit takes in the sent data and performs a predetermined operation.

Further, in order to request and transmit data to a predetermined unit, the controller specifies a unit by address specification and sends a data request command, and the addressed unit fetches the data request command, and then the specified predetermined request is transmitted. Is transmitted to the controller via the bus.

As a specific example of the system, there is an audio system in which a system controller centrally controls audio equipment (units) such as a tuner, a CD player, a cassette deck, a DAT device, a graphic equalizer, and an amplifier for each channel. The system controller sends a control command to a predetermined unit based on a key operation of the operation unit, controls the unit to perform control according to the operation key (switching of an audio source, play / stop, fast forward / rewind, program play, seek, , Frequency characteristics change, gain switching, volume adjustment, left / right volume ratio control, front / back volume ratio control, etc.), and sends display data to the display unit to perform a predetermined display.

In the above system, an address must be set for each unit, and the type of the address and the unit (tuner, cassette deck, CD, graphic equalizer, amplifier, etc.) must be registered in the controller. . For this reason, each unit is provided with an address setting switch, and a predetermined address (which must not be duplicated) is set in advance. When the system is powered on, each unit is set to its own address set by a request from the controller. The registration data, such as the address and type, is sent to the controller and registered.

By the way, in a car audio system or a surround system, amplifiers, speakers, etc. (referred to as channel units) having the same configuration are provided for each channel (front, rear, left, right, etc.). For this reason, it is not enough for the channel unit to register the address and the type, and which channel (rear / L-channel, rear / R-channel, front / L-channel, front / R-channel, etc.)
Must be registered.

Therefore, conventionally, the address of the rear L-channel amplifier is [0001], the address of the rear R-channel amplifier is "0010", the address of the front L-channel amplifier is "0011", and the front R -The address of the amplifier of the channel is determined as "0100", the correspondence between the address and the channel is stored in the controller, and the address is set in the amplifier of each channel by the address setting switch. Then, when power is supplied to the system, each amplifier sends its own address set by the request to the controller, and based on the sent address and the correspondence, the number of the address is assigned to which channel. An amplifier is identified and stored in a memory. The same applies to the speaker.

<Problems to be Solved by the Invention> However, in the conventional method of registering a channel unit, an arbitrary address cannot be set to the channel unit, and it is determined in advance according to which channel unit (amplifier, speaker). Address must be set with the address setting switch, the address setting operation is very troublesome, and sometimes the address is set incorrectly. There was a problem to be controlled.

Accordingly, an object of the present invention is to provide a method of registering a channel unit in which an arbitrary address can be set irrespective of which channel an amplifier and a speaker are for.

Another object of the present invention is to provide a channel unit registration method capable of automatically identifying what number address is for which channel unit even if an arbitrary address is set in the channel unit.

<Means for Solving the Problems> According to the present invention, there is provided an audio signal detection circuit provided in a unit of each channel to detect the presence or absence of an input audio signal, and an address setting switch for setting an address to each channel unit. Means for causing the audio source to output an audio signal to the i-th channel; means for notifying the controller of its own address by detecting the audio signal; and i-th output of the notified address and the audio signal.
Means for registering channel correspondence.

<Operation> A unit for each channel (for example, an amplifier) is provided with an audio signal detection circuit for detecting the presence or absence of an input audio signal, and an arbitrary address is set in advance for each amplifier. The audio signal is output to the i-channel, and the i-th channel amplifier that has detected the audio signal notifies the controller of its own address via the bus, and the controller determines the correspondence between the address and the i-th channel from which the audio signal was output. After that, the audio signal is sequentially output from the audio source to all the channels, and the address of the amplifier of each channel is registered.

<Embodiment> FIG. 1 is a block diagram of an audio system for realizing a channel unit registration method according to the present invention.
A system controller 11 and a number of units with built-in microcomputers are connected to one bus 10, and data can be exchanged between the system controller 11 and each unit.

12 is an operation unit provided with various operation keys, 13 is a display unit, 14 is an audio source, and a tone generator for generating a constant level tone at a constant frequency (1 KHz).
14a, a tuner 14b, and a cassette deck 14c. Reference numerals 15a to 15d denote amplifier units, 15a is for a rear / L-channel, 15b is for a rear / R-channel, 15c is for a front / L-channel, and 15d is for a front / R-channel. 16a to 16d are speakers, 16a is for a rear L-channel, 16b is for a rear / R-channel, 16c is for a front / L-channel, and 16d is for a front / R-channel.

A power line is separately connected to the system controller 11 and each of the units 12 to 16d, and power is turned on by pressing a power-on button on the operation unit 12.
Although not shown, each of the units 12 to 15d has an address setting switch so that a predetermined address can be set in advance. For example, if the maximum number of units in the system is 16
If the number is less than or equal to the number, settable address is 0000,000
There are 16 possible 1,0010,... 1111, and an arbitrary address is set so as not to overlap each unit.

Each of the amplifier units 15a to 15d has the same configuration. For example, as shown in FIG.
21 and an audio signal detector 22 for detecting the presence or absence of an input audio signal
Address setting switch 23 for setting an address, and a volume adjusting circuit 24 for adjusting the volume at which the amplifier output is input.
And a microcomputer 25 and a bus interface 26.

When registering the channel unit, the microcomputer 25 reads the address set in the address setting switch 23 and sends it to the system controller 11 via the bus interface 26 when the audio signal detection unit 22 detects the input audio signal.
The microcomputer 25 receives gain and volume adjustment data according to the key operation amount from the system controller 11 and
Or the volume control circuit 24 controls the volume.

Hereinafter, the amplifier registration method of the present invention will be described with reference to the flowchart of FIG. Note that the rear L-channel is the first channel, the rear R-channel is the second channel, the front L-channel is the third channel, and the front R-channel is
It is assumed that the channel is the fourth channel, and an arbitrary address is set to the address setting switch of each channel as shown in FIG.

When the power is supplied to the system and the registration of the address and type of each unit is completed, the system controller 11 first operates the tone generator 14a to identify the number of channels for the amplifier units 15a to 15d. A tone is output to the i channel (the initial value of i is 1) (step 101).

As a result, a tone is input to the amplifier unit of the i-th channel, and the audio signal detector 22 of the amplifier unit detects the audio signal and notifies the microcomputer 25 of the detection. In response to the audio signal detection notification, the microcomputer 25 reads the address set in the address setting switch 23 and sends it to the system controller 11 via the bus interface 26. still,
When the amplifier unit of the i-th channel does not exist, the address is not transmitted to the system controller 11.

After causing the tone generator 14a to output a tone to the i-th channel, the system controller 11 monitors whether an address is received within a predetermined time (step 102).

When the address is received, the correspondence between the address and the i-th channel from which the tone (voice signal) is output is stored in the internal memory.
Registered in 11a (step 103), on the other hand, if the address is not received within a predetermined time, it is recognized that the amplifier is not connected to the i-th channel (step 104). For example, i =
If the address is 0001 and the address is 0001, the system controller 11 determines that the rear L-channel amplifier unit is connected to the address 0001 and registers it.

Thereafter, the system controller 11 checks whether the registration processing has been performed for the amplifier units of all the channels (step 105). If the registration processing has not been completed, the system controller 11 increments i by i + 1 → i (step 106). Is performed, and if completed, the channel unit registration processing ends.

In the above, the amplifier unit has been described. However, the amplifier unit may be connected to each channel, and may be applied to, for example, a case where a speaker is registered for which channel.

<Effects of the Invention> According to the present invention, an audio signal detection circuit for detecting the presence or absence of an input audio signal is provided in each channel unit, and an arbitrary address is set in advance for each channel unit, and the channel unit is registered. In this case, an audio signal is output from the audio source to the i-th channel, the unit of the i-th channel that has detected the audio signal is notified of its own address, and the address and the response of the i-th channel to which the audio signal was output are registered Then, since the audio signal is sequentially output from the audio source to all channels and the address of the unit of each channel is registered, it is necessary to set an arbitrary address regardless of which channel the channel unit is for. And the unit of what number is automatically assigned to what channel This makes it easy to set the address and eliminates the need to set an address by mistake.

[Brief description of the drawings]

FIG. 1 is a block diagram of an audio system for realizing a channel unit registration method according to the present invention, FIG. 2 is a block diagram of an amplifier unit, FIG. 3 is a flowchart of the processing of the present invention, and FIG. It is an address correspondence chart. 10 Bus 11 System controller 14a Tone generator 15a to 15d Amplifier unit 22 Audio signal detector 23 Address setting switch

Claims (1)

(57) [Claims] An audio system in which a controller, an audio source, and units provided for each of a plurality of channels are connected to a bus, and operation information is transferred from the controller to the audio source and a unit of each channel via the bus. In the channel unit registration method, an audio signal detection circuit for detecting the presence or absence of an input audio signal is provided for each channel unit, and an address is set in advance for each channel unit. The audio signal is output to the i-th channel, and the unit of the i-th channel that has detected the audio signal notifies the controller of its own address via the bus, and the controller registers the correspondence between the address and the i-th channel. In order of channel A channel unit registration method for an audio system, wherein an audio signal is output from a next audio source and an address of a unit of each channel is registered.