KR920006293B1 - Power control method - Google Patents

Abstract

The method is to control power of audio equipments according to the state of signal input to an equalizer. The method comprises: (A) converting analog signals filtered by bandpass filters to digital signals; (B) checking the existance of signals in pass bands; (C) checking noise signals in the pass bands; and (D) turning off the power or sending control priority to an amplifier when no signal or noise signal is detected.

Description

Power control method

1 is a system block diagram to which the present invention is applied.

2-4 is a flow chart of the present invention.

* Explanation of symbols for main parts of the drawings

10: microcomputer BPF1-BPFN: band pass filter

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control method in an acoustic device, and more particularly, to a method for controlling a power supply by determining a state of a signal input to an equalizer.

In general, conventional sound equipment has performed power on / off control in accordance with the power key or timer reservation function. For example, when a user falls asleep while listening to music or is away for a long time, the tape or compact disc cannot be recorded. Even though it was a place, we had to keep crying until the end of the play on that side. At this time, if the regeneration operation was performed in the Otriverse state, the regeneration operation could not be continued until the user stopped the power supply.

In addition, even if the noise is too much from the tuner, because the tape or compact disc is running or the tuner has to wait until the correct signal has been tuned, there was a drawback of unnecessary power consumption. In addition, there was a risk of deterioration of sound quality due to the aging of tapes and compact discs due to continued use, as well as various uneconomical problems such as shortened life due to mechanical damage. Therefore, considering the economic aspects with the development of the high-tech electronic industry, it was indispensable that a way to solve these problems should emerge. Accordingly, an object of the present invention is to provide a method for automatically controlling power by recognizing an operating state of a system by determining a state of a signal input to an equalizer.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a system block diagram to which the present invention is applied, and includes a first-first N-th pass filter (BPF1-BPFN) for inputting a voice signal S and filtering each of the predetermined frequency bands, and then outputting the first-first N-th pass filter (BPF1-BPFN). The equalizer microcomputer 10 generates a clock CLK and a data signal Data according to the output state of the N-th band pass filter BPF-BPFN, communicates with the amplifier, and controls power on / off.

2 is an overall flowchart of the present invention, FIG. 3 is a no-signal checking process of FIG. 2, and FIG. 4 is a noise checking process of FIG. The present invention will be described in detail based on the above configuration. First, when the voice signal S is applied to the analog input terminal of the microcomputer 10 through the band pass filters BPF1-BPFN separating the lines, the microcomputer 10 is input in step (A) of FIG. 2. The analog voice signal is converted into a digital form to discriminate the signal. When the voice signal digitization operation is completed, a no signal check operation is performed in step (B). At this time, the no-signal determination operation is performed through the same process as in FIG. 3, and if it is low level in all bands and this state is maintained for a predetermined time or more, it is determined as a no-signal state. That is, in step (B1) of FIG. 3, the test preparation for the first band is completed, and then the process proceeds to step (B2) to check whether it is at a low level. In this case, the low level is taken as the limit value when the signal is no signal. If the test result is not at the low level, the no-signaling operation is terminated. On the other hand, if it is determined in step (B2) that the state of the first level is low level, the process proceeds to step (B3) to perform a state check preparation operation for the next band and whether the check operation is completed for all bands in step (B4). Check it.

If the check result is not completed for all bands as a result of the check, looping to the step (B2) to continue to perform the band-specific check operation. On the other hand, when it is determined in step (B4) that all the bands have been checked, the process proceeds to step (B5) to decrement the counter and checks whether the counter is "0" in step (B6). The counter is used to check whether the no signal condition continues for a certain time. If the check result counter is not "0", the no-signal check operation is terminated. If the counter is "0", go to step (B7) to determine no signal and directly control the power-off of the system or the amplifier in step (B8). In order to pass the control to the controller, the signal-free decision state is communicated to the ANF and terminated. Here, the counter value is appropriately selected in consideration of various situations such as the time when one song ends and another song starts, or the time to move from tape A side to tape B side. At this time, if the amplifier receives this control, it determines the current state and performs proper operation. However, you should ensure that the power is not turned off while the user is changing the tape or while recording.

After the non-signal check operation is completed, the process proceeds to step (C) of FIG. 2 to check whether the check result turns out to be no signal state. And exit. However, if it is determined in step (C) that there is no signal state (i.e., when the counter is not low in step (B2) of step 3 of the no-signal check process in FIG. 3 or the counter is not 0 in step (B6)) ( Proceed to step D) to check the noise signal. The process of checking whether the noise signal is generated is performed in the order as shown in FIG. 4, and is determined as noise when appearing at a high level over all bands. That is, in FIG. 4, after completing the inspection preparation work for the first band in step D1, the process proceeds to step D2 to check whether the first band is at a high level. If the test result is not at the high level, the noise check operation is terminated. On the other hand, if the first band is found to be at a high level, the process proceeds to step (D3) to perform a test preparation operation for the next band and then check whether all the bands are checked in step (D4). If the check operation for all bands is not completed as a result of the check, the process loops to step (D2) and repeats until the check operation for all bands is completed. On the other hand, if the check operation for all bands is completed, the process proceeds to step (D5) to decrement the counter and checks whether the counter is "0" in step (D6).

If the check result counter is not 0, the noise check operation is terminated. If the counter is 0, the operation is determined as a noise signal in step (D7), and then as in the case of no signal determination described in step (D8). Directly power off the system or communicate to the amplifier to transfer control and exit. After the noise check operation is completed as described above, it is checked whether the voice signal noise inputted as a result of the noise check operation shown in FIG. 4 is performed in step (E) of FIG. If it is determined that the noise is not noise (that is, if the level is not high in step (D2) of FIG. 4 or the counter is not 0 in step (D6) of FIG. 4), the noise check operation is terminated and it is determined that it is noise. Next, the process proceeds to the (F) step and ends after the noise processing. As described above, it is possible to automatically control the system power off by performing a communication operation that directly controls the system power-off or transfers control to the amplifier by judging it as no signal or noise as a result of checking the state of the voice signal in the equalizer. Not only is it convenient, it also has economic advantages such as preventing unnecessary operation and extending the life of the machine.

Claims (1)

A power supply control method for an acoustic device having an equalizer microcomputer and a plurality of bandpass filters, comprising: a first process of digitally converting an analog voice signal filtered for each band; and a no signal for each band of the digital voice signal A second step of checking whether or not, a third step of checking whether or not a noise signal is applied to each band of the digitalized voice signal, and controlling power by directly powering off the system or communicating a current status with an amplifier when determining no signal or noise signal Automatic power control method comprising the fourth step of turning over.

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