KR100245604B1 - Device and method for automatically inputting digital data - Google Patents

Abstract

The present invention relates to an automatic input switching device for digital data and a control method thereof, and in particular, an A channel data recognition unit (10) for recognizing predetermined data input from an A channel; A B channel data recognizing unit 20 for recognizing predetermined data input from the B channel; It consists of a data counter and an input selector 30 for counting the amount of data output from the A channel data recognition unit 10 and the B channel data recognition unit 20 or input data, in particular two or more inputs. In this digital system, if you have to select each as an optional input, it automatically switches to the channel with the input, meeting the needs of the consumer or user at the present time, which is becoming increasingly automated, There is an effect that provides ease of use to consumers or users who do not.

Description

Automatic input switching device of digital data and control method thereof

The present invention relates to an automatic input switching device for digital data and a method of controlling the same. In particular, in a digital system having two or more channel inputs, when an optional input of each channel is required, an additional system for selection is made. The automatic input switching system does not need to use.

Currently, when two or more digital data are to be selectively inputted from an MPEG encoder, a channel encoder, an MPEG decoder, a channel decoder, and a digital TV, two or more digital data channels are automatically switched. Automatic input switching devices are used in all electronic equipment and electronic products.

1 is a block diagram showing a conventional manual input switching device using a separate mechanical switch, a switch (1) for selecting which signal to use when a predetermined signal is input; A first buffer (2) which temporarily stores data for manipulation of the signal input at the input A; A second buffer 3 which temporarily stores data for manipulation of the signal input at the input B; The inverter 4 converts the DC power of the input control signal into AC power.

Referring to the operation of the automatic input switching device of the digital data configured as described above, as shown in Fig. 1, when two or more digital signals are input, the switch 1 is manually operated to the desired one of the two-channel signals for selection. Done.

As shown in FIG. 2, when two or more digital signals are input, A temporarily stores data in the first buffer 2, and signal B temporarily stores data in the second buffer 3. Save it as

In addition, a predetermined control signal is input to control data input to the first buffer 2 and the second buffer 3, and the predetermined inverter 4 is turned on before inputting to the first butter 2. A signal is inputted, and another signal is inputted to the second buffer 3, in which an A or B signal is output when a high signal is input, and a B or A signal is output when a low signal is input.

However, FIG. 1 of the apparatus for switching inputs using the conventional mechanical switch as described above is the simplest method, but does not meet the needs of consumers or users at the present time, which is becoming more and more automated, and uses the system for the first time or uses the system. If you don't understand it, there was a problem that you might have difficulty making a test or using it by making an error of choice.

In addition, the biggest problem of FIG. 2 is that another system capable of controlling the system is required to make a control signal of an enabled buffer. For example, the system may be connected to a personal computer to connect the system. In the case of controlling, in this case, there is a problem that a burden of developing a device and a control program for controlling from a PC is required.

In addition, as shown in FIG. 1, it may cause a selective error of a user who uses the system for the first time or has little understanding, and if one of the two channels causes a failure, the input must be manually switched and which one is normally operated. There was a problem that should be.

An object of the present invention is to solve the conventional technical problems as described above, and in particular, in a digital system having two or more input channels, each channel is automatically switched to a channel having an input. The purpose is.

Automatic data switching device of the present invention for achieving the above object comprises an A channel data recognition unit for recognizing predetermined data input from the A channel; A B channel data recognition unit recognizing predetermined data input from the B channel; And a data counter and an input selector for counting the amount of data output from the A channel data recognizer and the B channel data recognizer or selecting input data.

In addition, the control method of the digital data automatic input switching device of the present invention for achieving the above object comprises: a first A input step of determining whether the predetermined input signal is 1 and selecting the A input if it is 1; A second A input step of selecting an A input if the signal input in the first A input step is not 1; A first B input step of selecting B input if A is selected by determining whether the A input is selected in the first A input step; And a second B input step of selecting a B input when the change value of A is less than 1500 in the second A input step.

The automatic input switching device of the present invention and the control method of the present invention are operated so that the data to be selected can be automatically switched when two or more digital data are inputted, and at the present time, which is being increasingly automated, the consumer or the user It is effective in satisfying the needs of users and providing ease of use to consumers or users who do not use the system for the first time or understand the system well.

1 is a configuration diagram showing a manual input switching device using a conventional separate mechanical switch,

2 is a block diagram showing an automatic input switching device using a conventional control signal and the enable buffer,

3 is a timing diagram showing a state of digital data for explaining the technical gist of the present invention;

4 is a functional block diagram showing the configuration and overall operation of the present invention;

5 is a functional block diagram for recognizing the presence or absence of channel data of the present invention;

6 is a functional block diagram for calculating a duration and a change interval of data for recognizing the presence or absence of data of the present invention;

7 is a control flowchart showing an input selection state of the present invention.

≪ Explanation of Reference Symbols for Main Parts of the Drawing >

1: switch 2: first buffer

3: second buffer 4: inverter

10: A channel data recognition unit 20: B channel data recognition unit

30: data counter and input selector

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment according to the technical idea of the automatic input switching device and the control method of the digital data of the present invention will be described in detail as follows.

≪ Example >

First, the automatic input switching device of the digital data of the present invention comprises: an A channel data recognition unit 10 for recognizing predetermined data input from the A channel; A B channel data recognizing unit 20 for recognizing predetermined data input from the B channel; This embodiment includes a data counter and an input selector 30 for counting the amount of data output from the A-channel data recognition unit 10 and the B-channel data recognition unit 20 and selecting input data. .

In addition, the control method of the automatic input switching device of the digital data of the present invention comprises: a first A input step (100) for determining whether a predetermined input signal is 1 and selecting an A input if the input signal is 1; A second A input step 200 for selecting an A input if the signal input in the first A input step 100 is not 1; A first B input step 300 for selecting a B input if A is selected by determining whether the A input is selected in the first A input step 100; In the second A input step 200, if the change value of A is less than 1500, the present embodiment includes a second B input step 400 for selecting the B input.

Hereinafter, the operation of the device having the above-described configuration will be described in detail with reference to FIGS. 3, 4, 5, 6 and 7.

First, as shown in FIG. 3, the digital data is continuously changed to a logic high of 1: 2.4 V or more and a logic low of 0: 0.8 V or less, and the data is clock synchronized.

That is, the logic high or logic low is not continuous, and the maximum value of the duration is determined according to the system. For example, in an MPEG system, about 187 bytes may be continuous at a logic high, but 188 bytes are at a logic high. It cannot be continuous.

In addition, based on the above theory, in FIG. 3, a portion where input data changes, such as between 1 and 2, 3 and 4, 5 and 6, 7 and 8, and 9 and 10, is detected to determine whether there is data input. Can be detected.

In addition, a channel that will change data within a predetermined time can be said to have an input, and a channel that will not change data within a predetermined time can be said to have no input. It judges and automatically passes the input to the next stage.

In addition, FIG. 4 illustrates a case of two-channel input among the new two-channel or more digital input automatic selection scheme proposed by the present invention, and in the case of two or more channels, the A-channel data recognition unit 10 is extended by the method proposed by the present invention. ) And B channel data recognition unit 20 were added, and the data counter and input selection unit 30 were extended.

In addition, using the technical principle of FIG. 3, the A channel data recognition unit 10 and the B channel data recognition unit 20 determine the presence or absence of data, and the data counter and the input selection unit 30 of the next block respectively. Calculate and judge the section with and without input and select the input channel as a result and connect it to the output.

In addition, as shown in FIG. 5, the channel inputs of the A channel data recognition unit 10 and the B channel data recognition unit 20 may include clock, data, and enable, but may not be used. The enable input is open or connected and does not affect channel data recognition.

In addition, the irrelevance above does not mean that the enable input does not affect channel data recognition, but may be open. That is, when data having an unchanged bit rate is always enabled, the enable signal is not used. If not.

And data recognition uses DF / F and XOR (exclusive-OR) to distinguish between the section where the data changes and the section where the data continues, and this block can be used without changing the circuit or logic whenever the channel is expanded. Is added.

In addition, the data counter and the input selector 30 are divided into a data counter block and an input selection block, and the data counter block is shown in FIG. 6, where the data counter block is a block for calculating a data duration and a data change interval. to be.

In this case, since the maximum duration is different according to the characteristics of the system, the maximum value is used within the range possible, and in the present invention, the 1-bit counter is used, and the data counter only counts from 0 to the maximum value and does not loop again.

Since the maximum duration section can be recognized incorrectly, the data counter is reset only when the power is turned on and when the channel is changed.When the channel is set, the maximum duration section is counted to monitor the disconnection of input data. The data change is counted and the data input is monitored.

In addition, the counter values are implemented by an algorithm as shown in FIG. 7, and when the first channel is detected, a channel having a large amount of change in the input data is selected to be monitored when the maximum duration is exceeded and switched to another channel. Choose how to do it.

In addition, when the operation state of the algorithm illustrated in FIG. 7 is described, it is determined whether the input selection is 1 by turning on the power supply for operation, and if it is 1, it is determined whether to select the A input, and when the A input is not selected, B is selected. If it is greater than 1500, the initialization state is restarted.

Also, if the unchanged value of B is less than 1500, it is determined whether the change value of A is greater than 1500. If the change value of A is less than 1500, the initialization state is restarted. Select (100).

In addition, in the first A input step 100, if the input selection is not 1, it is determined whether the change value of A is greater than 1500. If the change value of A is greater than 1500, it is determined whether the unchanged value of B is smaller than 1500. If it is small, the A input is selected, but if the unchanged value of B is larger than 1500, the initial state is restarted (200).

In addition, in the first A input step, it is determined whether to input A in the first A input step, and when A is selected, it is determined whether the unchanged value of A is larger than 1500, and if it is larger than 1500, it is determined whether the change value of B is larger than 1500. If the unchanged value of A is less than 1500, the initialization state is restarted. If the change value of B is greater than 1500, the input state is selected. If the change value of B is less than 1500, the initialization state is restarted (300). .

In addition, in the second A input step 200, if the change value of A is less than 1500, it is determined whether the change value of B is larger than 1500, and if it is large, it is determined whether the unchanged value of B is smaller than 1500, and the change of B If the value is less than 1500, the initialization is restarted. If the unchanged value of B is less than 1500, the input of B is selected, but if the unchanged value of B is greater than 1500, the initialization is restarted (400).

On the other hand, the present invention is not limited to the above embodiments and can be variously modified within the scope not departing from the technical gist of the present invention, modified in various forms in a system that requires a number of digital input, such as broadcast equipment that requires a reserve It can be used and applied in various systems.

As described above, the automatic input switching device and the control method of the digital system having the input of two or more channels of the present invention, in particular, in the digital system having two or more inputs, each of which has to be automatically selected as an optional input. By switching to a channel, it is effective to meet the needs of consumers or users at the present time, which is becoming more and more automated, and to provide convenience for users or users who are new to first use or who do not understand the system well.

In addition, the biggest feature of the present invention is that the control signal is automatically generated by using the logic inside, so the present invention can be controlled, so that no additional system is required, and if an unexpected failure of the two channels occurs, It is automatically switched, and the benefits of the above automation and convenient system test time is reduced, and the overall system price is reduced and reliability is improved.

Claims (19)

An A channel data recognition unit recognizing predetermined data input from the A channel; A B channel data recognition unit recognizing predetermined data input from the B channel; And an input counter and a data counter for counting the amount of data output from the A-channel data recognition unit and the B-channel data recognition unit, and selecting the input data. 2. The method of claim 1, wherein the A channel data recognizing unit determines whether there is data, and calculates and determines a section having each input and a section having no input at the data counter and the input selection unit of the next block, and determines the input channel as a result. Automatic input switching device for digital data, characterized in that connected to the output by selecting. The channel input apparatus of claim 1, wherein the input of the channel of the A channel data recognizer may include clock, data, and enable, but the enable may not be used, and even if the enable input is open or connected, channel input recognition is not affected. Automatic input switching device of the digital data, characterized in that not configured. The data of claim 1, wherein the A channel data recognizing unit is always enabled when data having an unchanging bit rate is used, and when the enable signal is not used, a section and data in which data changes using data DF / F and XOR. Automatic input switching device of the digital data, characterized in that it is possible to discriminate the duration of the. The automatic input switching device of digital data according to claim 1, wherein the A channel data recognizing unit is added every time the channel is expanded without changing a circuit or logic. The channel detection apparatus of claim 1, wherein the B channel data recognizing unit determines whether data is present, and calculates and determines a section having each input and a section having no input at the data counter and the input selection unit of the next block, and as a result, the channel input. Automatic input switching device of digital data, characterized in that connected to the output. 2. The method of claim 1, wherein the channel of the B channel data recognizer may include clock, data, and enable, but enable may not be used, and even if the enable input is open or connected, channel input recognition is not affected. Automatic input switching device of the digital data, characterized in that not configured. The method of claim 1, wherein the B channel data recognizing unit is always enabled when the data has a bit rate that does not change, so when the enable signal is not used, a section and data in which data changes using data DF / F and XOR An automatic input switching device for digital data, characterized in that it is possible to discriminate the lasting sections. The automatic input switching device of digital data according to claim 1, wherein the B channel data recognizing unit is added every time the channel is expanded without changing a circuit or logic. The automatic input switching device of digital data according to claim 1, wherein the data counter and the input selection unit are divided into a data counter block and an input selection block. The automatic input switching device of digital data according to claim 10, wherein the data counter block comprises a block for calculating a data duration and a change interval of the data. 11. The automatic input switching device of digital data according to claim 10, wherein the data counter block uses a maximum value (using a 1-bit counter) within a possible range since the maximum duration is different according to the characteristics of the system. 12. The automatic input switching of digital data according to claim 10, wherein the data counter block is counted only from 0 to the maximum value and the loop is not turned again, and the data counter is reset only when the power is turned on and when the channel is changed. Device. 11. The method of claim 10, wherein when the channel is set, the input selection block counters the maximum duration and monitors the disconnection of the input data, and the unselected channel counters the change of data to input the data. Automatic input switching device for digital data, characterized in that the monitoring box. A first A input step of determining whether the predetermined input signal is 1 and selecting the A input if the input signal is 1; A second A input step of selecting an A input if the signal input in the first A input step is not 1; A first B input step of selecting B input if A is selected by determining whether the A input is selected in the first A input step; And a second B input step of selecting a B input when the change value of A is less than 1500 in the second A input step. 16. The method of claim 15, wherein the first A input step determines whether to input A, and if the input of A is not selected, determines whether the unchanged value of B is greater than 1500 and initializes if the unchanged value of B is greater than 1500. If the unchanged value of B is less than 1500, it is judged whether the change value of A is greater than 1500. If the change value of A is greater than 1500, select the input of A and if the change value of A is less than 1500, A control method for an automatic input switching device of digital data, characterized in that the initialization state is operated again. 16. The method of claim 15, wherein the second A input step determines whether the input selection is 1, and if it is not 1, determines whether the change value of A is greater than 1500. If the change value of A is greater than 1500, the value of B does not change. If the unchanged value of B is less than 1500, the input of A is selected, and if the unchanged value of B is greater than 1500, the control of the automatic input switching device for digital data is performed. Way. 16. The method of claim 15, wherein the first B input step determines whether an unchanged value of A is greater than 1500 if the input of A is not selected in the first A input step. It is determined whether the change value of is greater than 1500. If the unchanged value of A is less than 1500, the initialization operation starts. If the change value of B is larger than 1500, the input of B is selected and the change value of B is less than 1500. Control method of an automatic input switching device of digital data, characterized in that the initial operation is resumed. The method of claim 15, wherein the second B input step determines whether the change value of B is greater than 1500 if the change value of A is less than 1500 in the second A input step. It is determined whether the unchanged value is smaller than 1500. If the change value of B is smaller than 1500, the initialization operation is performed. If the unchanged value of B is smaller than 1500, the input of B is selected and the unchanged value of B is larger than 1500. The control method of the automatic data input switching device of digital data characterized in that the initialization operation is repeated if large.

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