JPS63157203A - Av system - Google Patents

Abstract

PURPOSE:To control each subunit by a main unit by connecting these subunits which can work independently of each other and the main unit by a common bus. CONSTITUTION:The subunits 31-3n contain the components 311-31n including the voice amplifier with speakers, television receivers, CD players, video disks, etc., and the slave CPU 321-32n which control those components 311-31n independently of each other. The units 31-3n are connected to a master CPU 41 of a main unit 4 via a common bus 42 which transmits the clocks, data, idents, etc. At the same time, the CPU 41 is always grasping the present states (active or inactive) of the units 31-3n via the bus 42. Thus it is possible to always control the units 31-3n by the unit 4 which functions as a normal unit without using a centralized control unit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an AV system comprising a plurality of units.

[Prior art]

As shown in FIG. 2, the conventional configuration of this type of AV unit includes a plurality of independently operating audio amplifiers, television receivers, CD players, video desk players, VTRs, etc. In many cases, a centralized control unit 2 was provided to organically combine the two. This centralized control unit 2 switches input and output signal lines, turns on and off the power of connected units, and controls the units based on remote control signals from the outside.

However, in this system, a special central control unit 2
The problem was that it required

[Purpose of the invention]

An object of the present invention is to eliminate the need for a centralized control unit and also to enable control by commands from outside the system.
V system.

[Structure of the invention]

To this end, the present invention provides an AV system having a plurality of subunits that can operate independently, a main unit that controls the subunits and operates independently, and a common bus that connects the subunits and the main unit. By giving commands to the main system from the outside, the CPU in the main system is put into a masked or standby state, and the commands are configured to control the elements in the main unit or the subunits.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a diagram showing blocks constituting an AV system according to one embodiment.

31-3a are subunits 1-n, and each component 31.3a is a subunit 1-n. ~31. ．． and its components 31.
It has slave CPUs 32 and 321 that control the CPUs 317 and 317, respectively. Components include an audio amplifier with speakers, a television receiver, a CD player, a record player, and a VTR.

Videodisc Brenya, Captain System, and others are available.

4 is a main unit, which includes a master CPU 4 having a control program for controlling the above-mentioned subunits 31 to 3n, a common bus 42 consisting of L and 1M buses, and a digital image processing section 43. - 431 and an external connection interface 44. This main unit 4
is incorporated into a CRT monitor device that plays a central role in an AV system. The common bus 42 is composed of lines for transmitting clocks, data, identification, etc., and is also connected to the subunits 31 to 37. The interface 44 is an external CP connected with a connector such as RS232C.
It is used to exchange signals with the U5 (personal computer, modem, etc.), and when commands from the external CPU 5 are manually input to the internal CPU, the master CPU 41 is masked or put into a standby state.

Now, in the above, c in subunits 31 to 3.1
pu32+~32. % is for each corresponding component 3
1. ~ 317, that is, it functions as a master, and also bidirectionally controls other subunits through the common bus 42, but when the main unit 4 connected to the common bus 42 becomes active, its main It functions as a slave to the master CPU 41 of the unit 4.

Therefore, in this state, the master CPU 41 uses a tl to determine the current state (operating, non-operating, etc.) of each element in the main unit as well as all of the subunits that make up the system. ! ! hold it. Then, when one subunit is connected to another subunit (for example, an audio amplifier with a speaker and a VT
(connection of audio signal output of R), the master CPU 41 is interposed between them.

Since the common lot 42 performs only one function of reading or writing for one address, in order to apply the addressing method to the slave CPUs 32 + to 327, one slave CPU must have at least two addresses. are allocated for reading and writing. Then, each slave CPU checks the sent address to see if it is an address that is unrelated to it, and if it is an address that specifies itself, the master CPU 41 instructs it to read the data (data: master slave). It is determined whether there is a slave or a command (data: slave mask) to send data, and the requested operation is performed.

As a result, for example, the digital image processing section 43 in the main unit 4. and a specific subunit,
Image data is exchanged.

Furthermore, when a control signal arrives from an external CPU 5 such as a personal computer, an interrupt line 45 from the interface 44 is sent.
The master CPU 41 is controlled to be in a mask or standby state, and the external CPU 5 comes to function as a mask instead of the mask CPU 41. In other words, common bus 4
Commands from the external CPU 5 can be transmitted to the CPU 2. Therefore, in this case, the system within the main unit 4 can be freely rearranged by the external CPU 5.

Further, as shown in FIG. 1, a plurality of main units 4
．． By controlling 4' and 4'' from the external CPU 5,
Systems can also be upgraded freely.

〔Effect of the invention〕

As described above, according to the present invention, other units can be constantly controlled and managed by the main unit functioning as a normal unit without using a centralized control unit. Also, from outside the system, for example by a computer,
You will be able to control what you want within the system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the configuration of an AV system according to an embodiment of the present invention, and FIG. 2 is a block diagram of the configuration of a conventional AV system. Agent Patent Attorney Tsuneaki Nagao Figure 1

Claims (3)

[Claims] (1) An AV system having a plurality of subunits that can operate independently, a main unit that controls the subunits and operates independently, and a common bus that connects the subunits and the main unit, The AV is characterized in that by giving a command to the main system from the outside, the CPU in the main system is put into a mask or standby state, and the command controls the elements in the main unit or the subunits. system. (2) A patent claim characterized in that the main system has an interface that receives instructions from the outside, and when the interface receives the external instructions, the CPU in the main system is masked or placed in a standby state. The AV system according to item 1. (3) The AV system according to claim 1, wherein the external command is transmitted via RS232C.