Display device and audio playing method

Abstract

The invention provides a display device and an audio playing method. The display device includes a processor, a first communication interface, and a second communication interface. The first communication interface is electrically connected with the processor and the playing device. The second communication interface is electrically connected with the processor. In response to an audio detection instruction received by the processor from the playing device through the first communication interface, the processor determines whether the connection interface of the second communication interface has a preset voltage. In response to the processor determining that the connection interface of the second communication interface does not have the preset voltage, the processor responds to the audio detection instruction to occupy the logic position of the audio system. In response to the processor determining that the connection interface of the second communication interface has the preset voltage, the processor ignores the audio detection instruction.

Description

Technical Field

[0001] The present invention relates to multimedia playing technology, and in particular to a display device and an audio playing method. Background Art

[0002] After a general audio and video playback device is connected to a monitor, if the audio and video playback device does not detect the audio device, the audio and video playback device will automatically play the audio, and if the user subsequently connects the audio device, the audio device will not be able to play the audio. In this case, the audio and video playback device can only be reconnected before the audio device can be used to play the audio. Summary of the invention

[0003] The invention provides a display device and an audio playing method, which can effectively play audio.

[0004] Based on the above-mentioned purpose, the present invention proposes an audio playback method, which includes: in response to the display device receiving an audio detection instruction from a playback device through a first communication interface, the display device determines whether a preset pin of a connection interface of a second communication interface has a preset voltage; in response to the display device determining that the preset pin of the connection interface of the second communication interface does not have the preset voltage, the display device responds to the audio detection instruction to occupy a logical position of the audio system; and in response to the display device determining that the preset pin of the connection interface of the second communication interface has the preset voltage, the display device ignores the audio detection instruction.

[0005] In a preferred embodiment, after the display device occupies the audio system logical position, in response to the second communication interface being electrically connected to the audio device, the display device transfers the audio system logical position to the audio device so that the playback device plays audio through the audio device.

[0006] In a preferred embodiment, in response to the processor determining that the preset pin of the connection interface of the second communication interface has the preset voltage, it indicates that the second communication interface is electrically connected to an audio device, and the audio device responds to the audio detection instruction to occupy the logical position of the audio system so that the playback device plays audio through the audio device.

[0007] In a preferred embodiment, when the playback device is turned on, the audio detection instruction is issued by the playback device.

[0008] In a preferred embodiment, the first communication interface and the second communication interface are respectively a High Definition Multimedia Interface (HDMI).

[0009] In a preferred embodiment, the connection interface is an Audio Return Channel (ARC) connection interface.

[0010] In a preferred embodiment, the audio detection instruction is generated based on a Consumer Electronics Control (CEC) protocol.

[0011] In a preferred embodiment, the display device is a projector.

[0012] In a preferred embodiment, in response to the processor occupying an audio system logical position, audio is played through the speaker device via a playback device of the display device.

[0013] Based on the above-mentioned purpose, the present invention also proposes a display device, which includes: a processor; a first communication interface, electrically connecting the processor and a playback device; and a second communication interface, electrically connecting the processor; wherein, in response to the processor receiving an audio detection instruction from the playback device through the first communication interface, the processor determines whether a preset pin of a connection interface of the second communication interface has a preset voltage; wherein in response to the processor determining that the preset pin of the connection interface of the second communication interface does not have the preset voltage, the processor responds to the audio detection instruction to occupy a logical position of the audio system; wherein in response to the processor determining that the preset pin of the connection interface of the second communication interface has the preset voltage, the processor ignores the audio detection instruction.

[0014] Based on the above technical solution, the display device and audio playback method of the present invention can automatically determine whether the audio system logical position is pre-occupied, so as to effectively avoid the playback device occupying the audio system logical position, thereby making the subsequently installed speaker device unable to effectively play audio. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of a multimedia system according to an embodiment of the present invention.

[0016] Figure 2 is a flow chart of an audio playing method according to an embodiment of the present invention.

[0017] Figure 3 is a flow chart of an audio playing method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0019] In order to make the content of the present invention more understandable, the following embodiments are given as examples of the present invention that can be implemented. In addition, wherever possible, the same reference numerals are used in the drawings and embodiments to represent the same or similar components.

[0020] Figure 1 is a schematic diagram of a multimedia system according to an embodiment of the present invention. Figure 1 , the multimedia system 100 includes a display device 110, a playback device 120, and an audio device 130. The display device 110 includes a processor 111, a first communication interface 112, and a second communication interface 113. The processor 111 is coupled (or electrically connected) to the first communication interface 112 and the second communication interface 113. The display device 110 can be connected to the playback device 120 via the first communication interface 112. The display device 110 can be connected to the audio device 130 via the second communication interface 112.

[0021] In this embodiment, the display device 110 may be a projector, but the present invention is not limited thereto. In one embodiment, the display device 110 may also be a display, such as a liquid crystal display, an OLED display, a television, etc. The playback device 120 may be an audio and video player with an audio playback function, and may have an audio playback unit. In this embodiment, the processor 111 may include a system on a chip (System on a Chip, SOC), or may include, for example, a central processing unit (Central Processing Unit, CPU) or other programmable general-purpose or special-purpose microprocessor (Microprocessor), a digital signal processor (Digital Signal Processor, DSP), a programmable controller, an application specific integrated circuit (Application Specific Integrated Circuits, ASIC), a programmable logic device (Programmable Logic Device, PLD), other similar processing devices or a combination of these devices. The first communication interface 112 and the second communication interface 113 may be high-definition multimedia interfaces (High Definition Multimedia Interface, HDMI), respectively, but the present invention is not limited thereto.

[0022] Figure 2 is a flow chart of an audio playing method according to an embodiment of the present invention. Figure 1 as well as Figure 2, the multimedia system 100 may, for example, perform the following steps S210 to S230. The playback device 120 may first be connected to the display device 110 through the first communication interface 112. In step S210, when the playback device 120 is turned on, the playback device 120 issues an audio detection instruction. In addition, the playback device 120 may provide an image signal to the display device 110 for image playback. In this embodiment, the audio detection instruction is generated based on the Consumer Electronics Control (CEC) protocol. In other embodiments, step S210 may also be that the playback device 120 periodically issues an audio detection instruction, or issues an audio detection instruction when a hot plug signal is received, and the present invention is not limited thereto. In step S220, in response to the display device 110 receiving the audio detection instruction from the playback device 120 through the first communication interface 112, the display device 110 determines whether the preset pin of the connection interface of the second communication interface 113 has a preset voltage, wherein the preset voltage may be 5 volts. In this regard, the connection interface may be, for example, an audio return channel (ARC) connection interface (the first communication interface 112 may also include an ARC connection interface), but the present invention is not limited thereto. The connection interface may also be a connection interface of other types or uses, such as an optical fiber digital audio connection interface (SPDIF, Sony / Philips Digital Interface), etc. In this embodiment, the display device 110 can confirm whether the second communication interface 113 is connected to the audio device 130 by determining whether a preset pin of the connection interface has a voltage, for example, by detecting the voltage of the 18th pin of the HDMI interface containing ARC, that is, the voltage of the hot plug detection pin (HPD, Hot Plug Detect).

[0023] If not, in step S230, in response to the display device 110 determining that the preset pin of the connection interface of the second communication interface 113 does not have a preset voltage, the display device 110 will respond to the audio detection instruction to occupy the audio system logical position. In this way, the playback device 120 will not play audio, and can output audio signals to the display device 110. In addition, in one embodiment, if the display device 110 also includes a speaker device, in response to the processor 111 occupying the audio system logical position, the playback device 120 will play audio through the speaker device. The speaker device is electrically connected to the processor 111.

[0024] It is worth noting that after the processor 111 occupies the audio system logical position, when the second communication interface 113 is subsequently electrically connected to the audio device 130, the processor 111 will transfer the audio system logical position to the audio device 130, so that the playback device 120 can play the audio through the audio device 130. In other words, when the multimedia system 100 is not yet connected to the audio device 130, the display device 110 can first occupy the audio system logical position, and after the multimedia system 100 is connected to the audio device 130, the audio system logical position is automatically transferred to the audio device 130. In this way, the multimedia system 100 can effectively avoid the playback device 120 occupying the audio system logical position, which causes the audio device 130 connected later to be unable to play audio.

[0025] In addition, if yes, in step S240, in response to the display device 110 determining that the preset pin of the connection interface of the second communication interface 113 has the preset voltage, the display device 110 ignores the audio detection instruction. In this regard, since the preset pin of the connection interface of the second communication interface 113 has the preset voltage, it means that the second communication interface 113 is electrically connected to the audio device 130, and the audio device 130 responds to the audio detection instruction to occupy the audio system logical position, so that the playback device 120 can play audio through the audio device 130.

[0026] Figure 3 is a flow chart of an audio playing method according to an embodiment of the present invention. Figure 1 as well as Figure 3 , Figure 3Steps S310 to S380 are used to illustrate a detailed implementation scenario of the multimedia system 100. In step S310, the user can operate the playback device 120 and the display device 110 to turn on. In step S320, the playback device 120 issues an audio detection instruction. In step S330, the display device 110 receives the audio detection instruction. In step S340, the display device 110 can determine whether the preset pin of the connection interface of the second communication interface 113 has a preset voltage. If so, the multimedia system 100 directly executes the following steps S370 and S380. If not, in step S350, the display device 110 will occupy the audio system logical position, and the display device 110 responds to the audio detection instruction. In step S360, the user can connect the display device 110 to the audio device 130, and the user turns on the audio device 130. The display device 110 automatically hands over the audio system logical position to the audio device 130. Specifically, in step S360, after the newly connected device 130 is connected to the display device 110, it will receive an audio detection instruction sent from the display device 110. If the device 130 responds to the audio detection instruction, the display device 110 recognizes the connected device 130 as an audio device 130, thereby handing over the logical position of the audio system to the audio device 130; if the device 130 does not respond to the audio detection instruction, the display device 110 still maintains the logical position of the audio system.

[0027] In step S370, the display device 110 plays the image according to the image signal provided by the playback device 120. In step S380, the audio device 130 plays the audio according to the audio signal provided by the playback device 120. In this way, the playback device 120 will not automatically occupy the audio system logical position, and the subsequently connected audio device 130 can effectively play the audio.

[0028] In summary, the display device and audio playback method of the present invention can automatically pre-occupy the audio system logical position before the audio device is connected, so as to effectively avoid the playback device occupying the audio system logical position, and the audio playback unit of the display device can first perform audio playback. In this way, when the user subsequently connects the audio device to the system, the display device can hand over the audio system logical position to the audio device, and the audio playback can be performed normally through the audio device. From another perspective, when installing the audio and video playback system, the user can install the audio device in any order, and can use the audio device normally for audio playback. The display device of the present invention can have higher device compatibility.

[0029] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. An audio playback method, characterized in that: include: In response to the display device receiving an audio detection instruction from the playback device through the first communication interface, the display device determines whether a preset pin of the connection interface of the second communication interface has a preset voltage; In response to the display device determining that the preset pin of the connection interface of the second communication interface does not have the preset voltage, the display device responds to the audio detection instruction to occupy an audio system logic position; as well as In response to the display device determining that the preset pin of the connection interface of the second communication interface has the preset voltage, the display device ignores the audio detection instruction.

2. The audio playback method according to claim 1, wherein: Also includes: After the display device occupies the audio system logical position, in response to the second communication interface being electrically connected to the audio device, the display device transfers the audio system logical position to the audio device, so that the playback device plays audio through the audio device.

3. The audio playback method according to claim 1, wherein: Also includes: In response to the processor determining that the preset pin of the connection interface of the second communication interface has the preset voltage, it indicates that the second communication interface is electrically connected to an audio device, and the audio device responds to the audio detection instruction to occupy the audio system logical position so that the playback device plays audio through the audio device.

4. The audio playback method according to claim 1, wherein: Also includes: When the playback device is turned on, the audio detection instruction is sent out through the playback device.

5. The audio playback method according to claim 1, wherein: The first communication interface and the second communication interface are respectively a High Definition Multimedia Interface (HDMI).

6. The audio playback method according to claim 1, wherein: The connection interface is an Audio Return Channel (ARC) connection interface.

7. The audio playback method according to claim 1, wherein: The audio detection command is generated based on a Consumer Electronics Control (CEC) protocol.

8. The audio playback method according to claim 1, wherein: The display device is a projector.

9. The audio playback method according to claim 1, wherein: Also includes: In response to the processor occupying an audio system logical position, audio is played through the speaker device via a playback device of the display device.

10. A display device, characterized in that: include: processor; A first communication interface electrically connected to the processor and the playback device; as well as The second communication interface is electrically connected to the processor. In response to the processor receiving an audio detection instruction from the playback device through the first communication interface, the processor determines whether a preset pin of the connection interface of the second communication interface has a preset voltage, In response to the processor determining that the preset pin of the connection interface of the second communication interface does not have the preset voltage, the processor responds to the audio detection instruction to occupy the audio system logic position, In response to the processor determining that the preset pin of the connection interface of the second communication interface has the preset voltage, the processor ignores the audio detection instruction.

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