TWI564790B - Structure for automatically detecting and switching audio sources in display device and determining method thereof - Google Patents

Description

Display automatic detection and switching source structure and its judgment method

The present invention relates to a display, and more particularly to a display structure for automatically detecting and switching a source of sound and a method for determining the same.

Current displays, in addition to the basic display functions, some will also be equipped with speakers, and depending on the input source, some are only images, and some contain images and sources.

Specifically, the current VGA and DVI interface is only image and no sound, so this type can only be matched with the analog source; while the HDMI and DP interfaces contain images and sounds, so the default value of the source is the source of the signal itself, but It can also be manually set to match the audio input of the analog input.

As can be seen from the above, there are many types of signal sources that can be connected to the display, including two types of video sources and audio sources. For the audio source, users must always have different signal sources. To manually switch the source of the sound source, this will cause inconvenience in use.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sound source that allows a display to be automatically switched to a sound input without the need for the user to manually set the sound source frequently.

In order to achieve the above object, the present invention provides a structure for automatically detecting and switching a source of a sound source and a method for determining the same.

The structure for automatically detecting and switching the source of the sound source comprises: a scaler; a line input module connected to the scaler and determining whether there is an external line connection; an analog-to-digital converter, the scaler and the line input The module is connected; and a sound source switch module is connected with the scaler and the analog digital converter, and outputs the sound source according to the line input condition and the user setting.

Continuing the above, the display further includes: a display module; a speaker module connected to the sound source switch module; and a screen function menu module connected to the display module and the sound source switch module, and Set the source input priority or fixed source input.

Continuing the above, the line input module comprises: a line input detecting unit connected to the analog digital converter; and at least one line input port, the line input port is connected to the analog bit converter and the line input detecting unit .

Continuing the above, the intermediate sound source switch module includes: a first sound source input port for the scaler to connect; a selection input port for the scaler to connect; and a second sound source input port for the line input port to perform Connection; and A sound source output port is connected to the speaker module.

The method for automatically detecting and switching the source of the sound source includes: (S1) initializing, reading the current state of the line input module, and storing the current state value to the first variable temporary storage area; (S2) reading Taking the current state of the line input module, and storing the value of the current state to the second variable temporary storage area; (S3) determining whether the value of the first variable temporary storage area is equal to the value of the second variable temporary storage area; (S4) determining Whether the value of the first variable temporary storage area is a connection, and selectively performs a secondary determination process or uses a video composite sound source input according to the determination result; (S5) setting the value of the first variable temporary storage area as the second variable temporary storage area (S6) determining whether the value of the first variable temporary storage area is a connection, and selectively performing a screen function menu setting or directly ending according to the determination result.

According to the above technical means, according to the preset value set by the user, the line input or the video composite sound source can be fixed, or the line input or the video composite sound source can be determined at the same time, which has a higher priority, so that it automatically switches. This allows users to quickly use without having to make excessive settings, making it easier to use.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

1‧‧‧ display

11‧‧‧Scaler

12‧‧‧Line Input Module

121‧‧‧Line input detection unit

122‧‧‧Line input port埠

13‧‧‧ Analog Digital Converter

14‧‧‧Source switch module

141‧‧‧First source input埠

142‧‧‧Select input埠

143‧‧‧Second audio input 埠

144‧‧‧Source output埠

15‧‧‧Display module

16‧‧‧ Speaker Module

17‧‧‧Screen function menu module

S1‧‧‧ initialization, will read the current state of the line input module, and store the current state value to the first variable temporary storage area

S11‧‧‧Display PC screen

S2‧‧‧ will read the current state of the line input module and store the current state value to the second variable temporary storage area

S3‧‧‧Review whether the value of the first variable temporary storage area is equal to the value of the second variable temporary storage area

S4‧‧‧Review whether the value of the first variable temporary storage area is connected, and selectively perform the secondary judgment procedure or use the video composite sound source input according to the judgment result

S5‧‧‧ Set the value of the first variable temporary storage area as the value of the second variable temporary storage area

S6‧‧‧Review whether the value of the first variable temporary storage area is connected, and selectively perform the screen function menu setting or directly end according to the judgment result

S1'‧‧‧Initialization: Read the line input device status and store "connected" or "not connected" to the variable line input final state

S2'‧‧‧Read the line input device status and store "connected" or "not connected" to the variable line input temporary status

S3'‧‧‧ Is the line input temporary status equal to the line input final state?

S41'‧‧‧ Is it judged whether the final state of the line input is "connected"?

S42‧‧‧Sub-judgment procedure

S43‧‧‧Using HDMI/DP as the sound source

S5'‧‧‧ gives the value of the line input final state to the line input temporary status

S6'‧‧‧ Is it judged whether the final state of the line input is "connected"?

S61‧‧‧Display source setting menu OSD

S62‧‧‧Users select the source settings and save to the audio settings

S63‧‧‧Close OSD

S4310‧‧‧Is the audio setting fixed to the line input?

S4311‧‧‧Is the audio setting fixed to the video composite source?

S4312‧‧‧Is the audio setting automatic switching but the video composite source has higher priority

S4313‧‧‧Is the audio setting automatic switching but the line input has higher priority

S4314, S4319, S4320‧‧‧ use line input as the sound source

S4315, S4318, S4321‧‧‧ use video composite audio source as the sound source

S4316‧‧‧Whether the video composite audio source has received the sound packet

Does the S4317‧‧‧ analog digital converter detect a line input with an audible input?

Figure 1 is a block diagram showing the structure of the display; 2 is a hardware circuit diagram of the line input detecting unit; FIG. 3 is a flow chart of the method for automatically detecting and switching the source of the sound source; FIG. 4 is a flowchart of the main determining program for automatically detecting and switching the source source determining method; A flowchart of the sub-determination program for automatically detecting and switching the source source judging method; and FIG. 6 is a schematic diagram of a menu for the source source selection in the OSD menu.

In the following embodiments, the same or similar component symbols represent the same or similar components. In addition, the directional terms mentioned in the following embodiments, for example, up, down, left, right, front or back, etc., refer only to the direction of the additional drawing, and therefore, the directional term used is used for explanation, and It is not intended to limit the invention.

Please refer to FIG. 1 , which is a structural block diagram of the display. The overall structure of the present invention can be clearly seen from the figure. The display 1 has basic use end objects such as the display module 15 , the speaker module 16 and the screen function menu. The module 17 also has some functions necessary for display, such as a scaler 11, a line input module 12, an analog digital converter 13 and a sound source switch module 14. The line input module 12 includes a line input detecting unit 121 and a line. The input port 122, the first source input port 141 and the selection input port 142 are connected to the scaler 11, the second sound source input port 143 is connected to the line input port 122, and the sound source output port 144 is connected to the speaker module 16; The video composite source (such as HDMI or DP) is directly input to the scaler 11, and the analog source is input to the line input port 122.

Please refer to FIG. 2 , which is a hardware circuit diagram of the line input detecting unit. It can be clearly seen from the figure that the physical circuit of the line input detecting unit 121 is known. The first contact is a telephone connection, the second contact and the fourth. The contacts correspond to the third contact and the fifth contact respectively, and there is a power between Vcc and ground. The resistance is connected to the capacitor, and the detection point is between the resistor and the capacitor. Through such a circuit structure, it can be known whether the analog input signal line is connected.

Please refer to FIG. 3 , which is a flowchart of a method for automatically detecting and switching the source of the sound source, and mainly includes steps S1 to S6, which are described as follows: Step S1 is mainly initialized, and the current state of the line input module is read, and The value of the current state is stored in the first variable temporary storage area; in step S2, the current state of the line input module is read, and the value of the current state is stored in the second variable temporary storage area; in step S3, the determination is made, the first variable Whether the value of the temporary storage area is equal to the value of the second variable temporary storage area, if the same is performed for S4, if not the same, S5; for step S4, another determination is made, whether the value of the first variable temporary storage area is connected, and according to the judgment As a result, the sub-judgment process is selectively performed or the video composite audio source is input, and after completion, the process returns to S2; in step S5, the setting is performed, and the value of the first variable temporary storage area is set as the value of the second variable temporary storage area; step S6, Another judgment is made as to whether the value of the first variable temporary storage area is a connection, and the screen function menu setting is selectively performed according to the judgment result or directly returns to S2, and when the screen function menu setting is completed, the process returns to S2.

In this way, the display can automatically select and switch the sound source according to the set value, so that the overall use does not require excessive manual switching adjustment.

Please refer to FIG. 4 , which is a flow chart of the main judgment program for automatically detecting and switching the source source judgment method. Here, a practical application example is presented, which is described as follows: S1': Initialization: Read the status of the line input device, and store "connected" or "not connected" to the variable line input final state, and then complete S11 after completion; S11: display the PC screen, and after completion S2'; S2': Read the line input device status, and store "connected" or "not connected" to the variable line input temporary status, and after the completion of S3'; S3': determine whether the line input temporary status is Is the equivalent line input final state? If yes, go to S41'. If no, go to S5'; S41': Determine whether the final state of the line input is "connected"? If yes, go to S42. If no, go to S43; S42: Perform sub-judgment process and enter S2' after completion; S43: Use HDMI/DP as the sound source, and enter S2' after completion; S5': The value of the final state of the line input is given to the line input temporary state, and after completion, it enters S6'; S6': Determine whether the final state of the line input is "connected"? If yes, go to S61, if not, go to S2'; S61: display the sound source setting menu OSD, and after completion, go to S62; S62: the user selects the sound source setting and saves to the audio setting, and after completion, proceeds to S63; S63: Close the OSD and enter S2' after completion.

In this way, according to such a judgment manner, the effect of automatically detecting the display and switching the source of the sound source proposed in the present case can be achieved.

Please refer to FIG. 5 , which is a flowchart of the judging program for automatically detecting and switching the source source judging method, mainly based on the user's selection of the Audio Source Select in the OSD menu to perform a series of judgments, as follows: S4310 determines the audio setting. Whether it is fixed to the line input, if yes, enter S4314, if not, enter S4311; S4311 determines whether the audio setting is fixed to the video composite sound source, if yes, enter S4315, if not, enter S4312; S4312 determine audio Set whether it is automatic switching but the video composite source has higher priority. If yes, go to S4316. If no, go to S4313. S4313 determines whether the audio setting is automatic switching but the line input has higher priority. If yes, End the sub-judgment program, if not, enter S4317; S4314 uses the line input as the sound source, and ends the sub-judgment program; S4315 uses the video composite sound source as the sound source, and ends the sub-judgment program; S4316 determines whether the video composite sound source has received the sound packet If yes, go to S4318, if not, go to S4319; S4317 judge analogy Whether the bit converter detects the line input has a sound input, if yes, enters S4320, if not, enters S4321; S4318 uses the video composite sound source as the sound source, and ends the sub-judgment program; S4319 uses the line input as the sound source, and ends The sub-judgment program; S4320 uses the line input as the sound source, and ends the sub-judgment program; S4321 uses the video composite sound source as the sound source, and ends the sub-judgment program.

Please refer to FIG. 6. FIG. 6 is a schematic diagram of a menu for selecting an audio source in the OSD menu. As can be seen from the figure, in the screen of the display 1, there are four options for selecting the source source, and the audio is set to be fixed to the line input. The audio is set to be fixed to the video composite sound source, the audio setting is automatically switched, but the video composite sound source has higher priority, the audio setting is automatically switched, but the line input has higher priority, etc., which respectively correspond to the sub-judgment program. The four judgments, the preferred way to use the setting is to set the third or fourth option, that is, the source will be switched automatically. The difference lies only in the video composite source (HDMI/DP) or line-in (Line-in). A higher priority; a supplementary explanation is given as to whether there is an audio input to the line-in (Line-in), which can be detected by an analog-to-digital converter (Analog-to-Digital Converter), which is sampled by an analog-to-digital converter. When the signal has a high or low change, it means that there is a voice input. The principle is that the change of the sound signal will be much larger than the noise, and the video composite audio source (HDMI/DP) is You have received voice packets to be judged.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. The scope of protection is subject to the definition of the scope of the attached patent application.

S1‧‧‧ initialization, will read the current state of the line input module, and store the current state value to the first variable temporary storage area

S2‧‧‧ will read the current state of the line input module and store the current state value to the second variable temporary storage area

S3‧‧‧Review whether the value of the first variable temporary storage area is equal to the value of the second variable temporary storage area

S4‧‧‧Review whether the value of the first variable temporary storage area is connected, and selectively perform the secondary judgment procedure or use the video composite sound source input according to the judgment result

S5‧‧‧ Set the value of the first variable temporary storage area as the value of the second variable temporary storage area

S6‧‧‧Review whether the value of the first variable temporary storage area is connected, and selectively perform the screen function menu setting or directly end according to the judgment result

Claims (5)

A method for judging and automatically switching a source of a sound source, comprising: (S1) initializing, reading a line input module current state, and storing a current state value to a first variable temporary storage area; (S2) The current state of the line input module is read, and the value of the current state is stored to the second variable temporary storage area; (S3) determining whether the value of the first variable temporary storage area is equal to the value of the second variable temporary storage area; (S4) Determining whether the value of the first variable temporary storage area is a connection, and selectively performing a secondary determination process or using a video composite sound source input according to the determination result; (S5) setting the value of the first variable temporary storage area as the second variable temporary storage The value of the area; (S6) determining whether the value of the first variable temporary storage area is a connection, and selectively performing the screen function menu setting or directly ending according to the determination result. The method for judging the automatic detection and switching of the source of the sound source according to the first aspect of the patent application, wherein the S1 and S2 further comprise a step (S11) for displaying the PC screen. The method for judging and automatically switching the source of the sound source according to the first aspect of the patent application, wherein S4 includes: S41 determining whether the value of the first variable temporary storage area is a connection; S42 performing a sub-judgment process; and S43 using the video Composite source input. For example, the method for automatically detecting and switching the source of the sound source according to the first aspect of the patent application scope, wherein the S6 includes: S61 displays the sound source setting menu OSD; S62 user selects the sound source setting and stores it to the audio setting; S63 turns off the OSD. The method for judging and switching the source of the sound source according to the first aspect of the patent application, wherein the sub-judgment program comprises: S4310 determining whether the audio setting is fixed to the line input, and if yes, entering S4314, if no If yes, enter S4311; S4311 determines whether the audio setting is fixed to the video composite sound source, if yes, enter S4315, if not, enter S4312; S4312 determines whether the audio setting is automatic switching but the video composite sound source has higher priority, such as If yes, go to S4316. If no, go to S4313. S4313 determines whether the audio setting is automatic switching but the line input has higher priority. If yes, end the sub-judgment procedure. If no, go to S4317; S4314 uses line input as Sound source, and end the sub-judgment program; S4315 uses the video composite sound source as the sound source, and ends the sub-judgment program; S4316 determines whether the video composite sound source has received the sound packet, if yes, enters S4318, if not, enters S4319; S4317 judges Does the analog digital converter detect that the line input has a voice input, and if so, enter S4320, as it enters the NO S4321; S4318 using the composite video source as the source, and ends the sub program is determined; S4319 using the line input as the source, and ends the sub program is determined; The S4320 uses the line input as the sound source and ends the sub-judgment program; the S4321 uses the video composite sound source as the sound source, and ends the sub-judgment process.