TW202221492A - System and method for controlling play of audio signal - Google Patents

Abstract

A system and a method for controlling play of audio signal are provided. A connector of an audio adapter is continually plugged into a connection port of an electronic device such that the audio adapter is connected to the electronic device. When the audio adapter is not wirelessly connected to a remote playback device, the audio adapter reports a disconnecting signal to the electronic device. A control component of the electronic device controls a built-in broadcasting device to play an audio signal according to the disconnecting signal. When the audio adapter is wirelessly connected to the remote playback device, the audio adapter reports a connecting signal to the electronic device. The electronic device provides the audio signal to the audio adapter, and then the audio adapter transmits the audio signal to the remote playback device. The remote playback device plays the audio signal.

Description

Audio signal playback control system and method

The invention relates to an audio signal playback control system and method, in particular to an audio signal playback control system and method suitable for a USB audio adapter, which detects and maintains the potential level of the pin of the USB audio adapter inserted into an electronic device to select different playbacks The device plays an audio signal.

Common audio and video devices such as computers, TVs, game consoles, or mobile phones have built-in audio systems in their hosts and output sound through speakers or headphone jacks in the device. Users can also plug in an audio adapter that meets the specifications to expand other audio output devices. The audio adapter can also be combined with the wired or wireless network transmission function to transfer the audio data sent by the universal serial bus (USB bus) to the wired or wireless network and transmit it to the remote speakers or headphones.

When the host detects that an audio adapter is plugged in, the system will automatically route the audio from the built-in speakers to the audio adapter. When the host detects that the audio adapter is removed, the system switches the audio channel from the audio adapter back to the built-in speakers. If the host is a small portable device, such as a mobile phone or a handheld game console, the action of plugging and unplugging the audio adapter is quite convenient for the user, but if the host is a large fixed device such as a TV, it is very troublesome for the user. .

The technical problem to be solved by the present invention is to provide an audio signal playback control system including an audio adapter in view of the deficiencies of the prior art. When the connector of the audio adapter remains inserted into the port of the electronic device, the audio adapter and the connection to the electronic device remain disconnected. When there is no connection or disconnection between the audio adapter and the remote playback device, the audio adapter reports a disconnected signal to the electronic device, and the electronic device controls the built-in audio device of the electronic device to play the electronic device according to the disconnected signal. provided audio signal. When the audio adapter and the remote playback device are wirelessly connected, the audio adapter reports the connected signal to the electronic device, and the electronic device controls the built-in audio device to stop playing the audio signal according to the connected signal, and provides the audio signal to the electronic device. The audio adapter is then transmitted to the remote playback device for playback through the audio adapter.

In one embodiment, the connector of the audio adapter is a USB connector. The connection port of the electronic device is a USB connection port.

In one embodiment, when the audio adapter is plugged into the electronic device but not connected to the remote playback device, the D+ pin of the audio adapter is kept at a low level. When the electronic device detects a low potential, it is determined that there is no connection or disconnection between the audio adapter and the electronic device.

In one embodiment, when the audio adapter is plugged into the electronic device and connected to the remote playback device, the D+ pin of the audio adapter is kept at a high potential. When the electronic device detects a high potential, it is determined that the audio adapter and the electronic device are connected, and the electronic device switches the audio signal from the built-in audio device to the audio adapter for playback.

In one embodiment, when the Bluetooth wireless connection between the audio adapter and the remote broadcasting device is disconnected, the D+ pin of the audio adapter is kept at a low level. When the electronic device detects a low potential, it is determined that there is no connection or disconnection between the audio adapter and the electronic device. When the electronic device switches the audio signal back to the built-in broadcasting device and switches back to the disconnected state, the electronic device switches back to controlling the built-in broadcasting device to play the audio signal.

In one embodiment, the built-in playback device includes a speaker built into the electronic device. The remote playback device includes a remote speaker, an earphone, or a combination thereof.

In addition, the present invention provides an audio signal playback control method, comprising the following steps: (a) keeping the audio adapter plugged into the electronic device; (b) determining whether the audio adapter is connected to the remote playback device; if not, the audio adapter maintains In the disconnected state with the electronic device, the electronic device uses the built-in broadcasting device to play the audio signal, and does not perform the subsequent steps; The audio signal is wiredly transmitted from the electronic device to the audio adapter; (d) the audio adapter is wirelessly transmitted to the remote playback device; and (e) the audio signal is played by the remote playback device, and then returns to step (b).

In one embodiment, the audio signal playback control system further includes the following steps: (f) keeping the D+ pin of the audio adapter at a low level when the audio adapter is not connected to the remote playback device; (g) according to When the potential is low, the electronic device determines that the audio adapter is disconnected from the electronic device, and the built-in playback device plays the audio signal.

In one embodiment, the audio signal playback control method further includes the following steps: (h) keeping the D+ pin of the audio adapter at a high potential when the audio adapter is connected to the remote playback device; and (i) according to High potential, the electronic device determines that the audio adapter is connected to the electronic device, and determines that the audio adapter plays audio signals.

In one embodiment, the audio signal playback control method further includes the following steps: (j) wirelessly connecting the audio adapter to the remote broadcasting device through Bluetooth; (k) transmitting the audio signal from the audio adapter through Bluetooth transmission technology Play to the remote playback device; (1) determine whether the connection between the far end of the audio adapter and the remote playback device is switched back to a disconnected state or the remote playback device moves out of a connectable range, resulting in a disconnection with the far end of the audio adapter, If not, go back to step (k), if yes, go to next step (m); (m) switch to using the built-in audio device to play the audio signal.

As described above, the present invention provides an audio signal playback control system and method, wherein the audio adapter reports the connection or disconnection status of the host according to the connection status with the remote playback device such as speakers or earphones. When the network is connected, the audio adapter reports the connected signal (for example, the pin of the USB audio adapter is kept high), so that the audio adapter can transmit the audio signal to the remote playback device through the wireless network. On the contrary, when the network is disconnected, the audio adapter reports a disconnected signal (eg, the pin of the USB audio adapter is kept low), so as to switch to the built-in playback device to play the audio signal.

For a further understanding of the features and technical content of the present invention, please refer to the following detailed descriptions and drawings of the present invention. However, the drawings provided are only for reference and description, and are not intended to limit the present invention.

The following are specific embodiments to illustrate the embodiments of the present invention, and those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to the actual size, and are stated in advance. The following embodiments will further describe the related technical contents of the present invention in detail, but the disclosed contents are not intended to limit the protection scope of the present invention. In addition, the term "or", as used herein, should include any one or a combination of more of the associated listed items as the case may be.

Please refer to FIGS. 1 and 2 , wherein FIG. 1 is a schematic diagram of the configuration of an audio adapter and a liquid crystal display device of an audio signal playback control system according to an embodiment of the present invention; FIG. 2 is an audio adapter and an audio signal playback control system of an embodiment of the present invention. Schematic diagram of the configuration of the liquid crystal display device and the Bluetooth headset.

As shown in FIG. 1 and FIG. 2 , the audio signal playback control system according to the embodiment of the present invention may include an audio adapter 10 such as a USB audio adapter. The audio adapter 10 may have a slot, such as but not limited to a USB slot.

For example, one end of an extra cable, such as a USB connector, can be inserted into a matching slot of the audio adapter, such as a USB slot, and the other end of the cable can be inserted into a port or slot of the electronic device 20 (eg, a liquid crystal display device). , so as to connect the audio adapter 10 to the electronic device 20 through a cable. Alternatively, the audio adapter 10 itself may have a connector (eg, but not limited to, a USB connector) that can be directly inserted into a corresponding port of the electronic device 20 (eg, but not limited to, a USB port).

When the audio adapter 10 as shown in FIG. 1 is not connected to any remote playback device, the audio adapter 10 reports a disconnected signal to the electronic device 20 . The electronic device 20 controls the built-in audio device to play the audio signal according to the disconnected signal.

When the audio adapter 10 as shown in FIG. 2 is wirelessly connected with the remote playback device 30 (such as but not limited to Bluetooth earphones), the audio adapter 10 reports a connected signal to the electronic device 20 . The electronic device 20 controls the built-in audio device to stop playing the audio signal according to the connected signal, provides the audio signal to the audio adapter 10 , and then transmits the audio signal to the remote playback device 30 for playback through the audio adapter 10 .

Please refer to FIG. 3 and FIG. 4 , wherein FIG. 3 is a block diagram in which the pins of the audio adapter of the audio signal playback control system according to the embodiment of the present invention are low potentials; FIG. 4 is the audio signal of the audio signal playback control system according to the embodiment of the present invention. The block diagram of the adapter changing the pin from low potential to high potential when wirelessly connected to a remote playback device.

As shown in FIG. 3 , a connector (of a cable) such as a USB connector of the audio adapter 10 is inserted into a connecting port such as a USB port of the electronic device 20 . At this time, the audio adapter 10 keeps one pin D+ of the plurality of pins of the audio adapter 10 at a low level VL.

The detection element 24 of the electronic device 20 can electrically contact the pin D+ of the audio adapter 10 inserted into the port of the electronic device 20 . When the detection element 24 of the electronic device 20 detects that the pin D+ of the audio adapter 10 is at a low level VL, it outputs a disconnection detection signal.

The control element 22 of the electronic device 20 is connected to the detection element 24 and the audio signal providing element 21 . When the control element 22 of the electronic device 20 receives the disconnection detection signal from the detection element 24, the control element 22 determines that the audio adapter 10 and the electronic device 20 are disconnected, and selects the built-in broadcasting device 23 accordingly, so that the The audio signal providing element 21 , the control element 22 and the built-in broadcasting device 23 form an audio path/audio path. In this case, the control element 22 transmits the audio signal provided by the audio signal providing element 21 to the built-in broadcasting device 23 (such as but not limited to speakers), so as to play audio from the built-in broadcasting device 23 as shown in FIG. 1 and FIG. 3 signal.

Next, as shown in FIG. 4 , the connector (of the cable) of the audio adapter 10 remains inserted into the connection port of the electronic device 20 . It should be noted that at this time, the audio adapter 10 is wirelessly connected to the remote playback device 30 such as speakers or headphones. In this case, the audio adapter 10 switches the pin D of the audio adapter 10 from the low level VL to the high level VH.

When the detection element 24 of the electronic device 20 detects that the pin D+ of the audio adapter 10 is at a high level VH, it outputs a connected detection signal. When the control element 22 of the electronic device 20 receives the connected detection signal from the detection element 24 (that is, the pin D+ of the audio adapter 10 is at a high level VH), the control element 22 determines the connection between the audio adapter 10 and the electronic device 20 It has been connected, and the audio adapter 10 is selected accordingly, so that an audio path/audio path is formed between the audio signal providing element 21, the control element 22 and the audio adapter 10, and an audio path/audio path is formed between the audio adapter 10 and the remote playback device 30 audio path.

In this case, the control element 22 of the electronic device 20 transmits the audio signal to the audio adapter 10, and then the audio adapter 10 transmits the audio signal to the remote playback device 30 (not to the built-in audio device 23), as shown in the figure 2 and FIG. 4 , the audio signal is played by the remote playback device 30 . At this time, the built-in audio device 23 does not play the audio signal.

During the process of playing the audio signal by the remote playback device 30, the remote playback device 30 may move too far away from the audio adapter 10 and not within a connectable range, or the audio adapter 10 may receive poor signals. A disconnection occurs with the remote playback device 30 . When disconnection occurs, the audio adapter 10 converts the pin D+ of the audio adapter 10 from the high level VH back to the low level VL.

When the detection element 24 of the control element 22 detects that the pin D+ of the audio adapter 10 is at a low level, it outputs the unconnected detection signal to the control element 22 again as shown in FIG. 3 . In this case, the control element 22 of the electronic device 20 determines that the connection between the electronic device 20 and the audio adapter 10 is disconnected according to the disconnection detection signal, and transmits the audio signal to the built-in broadcasting device 23 to control the built-in broadcasting device 23 . The playback device 23 plays the audio signal.

Due to the disconnection between the audio adapter 10 and the electronic device 20, the remote playback device 30 may have played a part of the audio signal, the control element 22 may only transmit the remaining unplayed part of the audio signal to the audio adapter 10, or It transmits the complete audio signal to the audio adapter 10 .

Please refer to FIG. 5 , which is a block diagram showing that the pins of the audio adapter of the audio signal playback control system according to the embodiment of the present invention are at a low level.

When there is no connection or disconnection between the audio adapter 10 and the electronic device 20, the audio signal can be played by the built-in audio device 23 inside the electronic device 20 as shown in FIG. 1 and FIG. 3, or as shown in FIG. 5, The audio signal is played by a built-in broadcasting device 26 (such as but not limited to a speaker) which is disposed outside the electronic device 20 and is wiredly connected to the electronic device 20 .

Please refer to FIG. 6 , which is a flow chart of the steps of the audio signal playback control method according to the embodiment of the present invention.

As shown in FIG. 6 , the audio signal playback control method of this embodiment includes the following steps S101 to S113 , which can be executed as the aforementioned audio signal playback control system.

In step S101 , the audio adapter 10 is kept plugged into the electronic device 20 .

In step S103 , the control element 22 of the electronic device 20 determines whether the audio adapter 10 and the electronic device 20 are connected according to the potential level of the pin D+ of the audio adapter 10 . If the potential of the pin D+ of the audio adapter 10 is low, it is determined that the audio adapter 10 is not connected to the electronic device 20 , and then steps S105 and S107 are performed in sequence. On the contrary, if the potential of the pin D+ of the audio adapter 10 is at a high level, it is determined that the audio adapter 10 has been connected to the electronic device 20 , and then steps S109 to S113 are performed in sequence.

In step S105 , the control element 22 of the electronic device 20 transmits the audio signal to the built-in broadcasting device 30 .

In step S107 , the electronic device 20 uses the built-in audio device 30 to play the received audio signal.

In step S109 , the audio signal is transmitted from the electronic device 20 to the audio adapter 10 .

In step S111 , the audio signal is wirelessly transmitted to the remote playback device 30 through the audio adapter 10 .

In step S113 , the received audio signal is played by the remote playback device 30 .

During or after steps S107 and S113, step S103 can be returned to determine whether the current connection status between the audio adapter 10 and the electronic device 20 has changed.

[Advantageous effects of the embodiment]

One of the beneficial effects of the present invention is that, in the audio signal playback control system and method provided by the present invention, the audio adapter reports the connection or disconnection status of the host according to the connection status with the remote playback device such as speakers or earphones. When the network is connected, the audio adapter reports the connected signal (for example, the pin of the USB audio adapter is kept high), so that the audio adapter can transmit the audio signal to the remote playback device through the wireless network. On the contrary, when the network is disconnected, the audio adapter reports a disconnected signal (eg, the pin of the USB audio adapter is kept low), so as to switch to the built-in playback device to play the audio signal.

The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, any equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

10: Audio Adapter 20: Electronics 30: Remote playback device 21: Audio signal providing components 22: Control elements 23, 26: Built-in broadcasting device 24: Detection element D+: pin position VH: High potential VL: low potential S101~S113: Steps

FIG. 1 is a schematic diagram of the configuration of an audio adapter and a liquid crystal display device of an audio signal playback control system according to an embodiment of the present invention.

2 is a schematic diagram of the configuration of an audio adapter, a liquid crystal display device, and a Bluetooth headset of an audio signal playback control system according to an embodiment of the present invention.

FIG. 3 is a block diagram showing that the pins of the audio adapter of the audio signal playback control system according to the embodiment of the present invention are at a low level.

4 is a block diagram of the audio adapter of the audio signal playback control system according to an embodiment of the present invention, when the audio adapter is wirelessly connected to a remote playback device, the pin position is changed from a low level to a high level.

FIG. 5 is a block diagram showing that the pins of the audio adapter of the audio signal playback control system according to the embodiment of the present invention are at a low level.

FIG. 6 is a flow chart of steps of a method for controlling audio signal playback according to an embodiment of the present invention.

10: Audio Adapter

20: Electronics

30: Remote playback device

Claims (10)

An audio signal playback control system, comprising: an audio adapter, when a connector of the audio adapter remains inserted into a port of an electronic device, the audio adapter remains disconnected from the electronic device; When there is no connection or disconnection between the audio adapter and a remote playback device, the audio adapter reports the disconnected signal to the electronic device, and the electronic device controls the electronic device according to the disconnected signal A built-in audio device of the electronic device plays an audio signal provided by the electronic device; When the audio adapter and the remote playback device are wirelessly connected, the audio adapter reports a connected signal to the electronic device, and the electronic device controls the built-in audio device to stop playing according to the connected signal The audio signal is provided to the audio adapter, and then transmitted to the remote playback device for playback through the audio adapter. The audio signal playback control system of claim 1, wherein the connector of the audio adapter is a USB connector, and the connection port of the electronic device is a USB connection port. The audio signal playback control system as claimed in claim 2, wherein when the audio adapter is inserted into the electronic device but not connected to the remote playback device, a D+ pin of the audio adapter is kept at a low level, the When the electronic device detects the low potential, it is determined that the audio adapter and the electronic device are not connected or disconnected. The audio signal playback control system of claim 3, wherein when the audio adapter is inserted into the electronic device and connected to the remote playback device, the D+ pin of the audio adapter is kept at a high potential, and the electronic When the device detects the high potential, it is determined that the audio adapter and the electronic device are connected, and the electronic device switches the audio signal from the built-in audio device to the audio adapter for playing. The audio signal playback control system according to claim 1, wherein when the Bluetooth wireless connection between the audio adapter and the remote broadcasting device is disconnected, the pin of the audio adapter is kept at a low potential, and the electronic device detects When the low potential is detected, it is determined that there is no connection or disconnection between the audio adapter and the electronic device, and the electronic device switches the audio signal back to the built-in audio device for playback. The audio signal playback control system of claim 1, wherein the built-in playback device includes a speaker built in the electronic device, and the remote playback device includes a remote speaker, an earphone, or a combination thereof. An audio signal playback control method, comprising the following steps: (a) maintaining an audio adapter plugged into an electronic device; (b) The audio adapter determines whether it is connected to a remote playback device. If not, the audio adapter remains disconnected from the electronic device. The electronic device uses a built-in audio device to play an audio signal without executing Follow-up steps, if yes, perform the next steps; (c) the audio adapter remains connected to the electronic device, and the electronic device transmits the audio signal by wire from the electronic device to the audio adapter; (d) the audio adapter transmits wirelessly to the remote playback device; and (e) use the remote playback device to play the audio signal, and then return to step (b). The audio signal playback control method according to claim 7, further comprising the following steps: (f) When the audio adapter is not connected to the remote playback device, keep a D+ pin of the audio adapter at a low potential; (g) According to the low level, the electronic device determines that the audio adapter is disconnected from the electronic device, and the built-in playback device plays the audio signal. The audio signal playback control method according to claim 8, further comprising the following steps: (h) when the audio adapter is connected to the remote playback device, keep the D+ pin of the audio adapter at a high potential; and (i) According to the high potential, the electronic device determines that the audio adapter is connected to the electronic device, and determines that the audio adapter plays the audio signal. The audio signal playback control method according to claim 7, further comprising the following steps: (j) wirelessly connect the audio adapter to the remote audio device via Bluetooth; (k) transmit the audio signal from the audio adapter to the remote playback device for playback through Bluetooth transmission technology; and (l) Determine whether the connection between the remote broadcasting device and the audio adapter is switched back to the disconnected state or the remote broadcasting device moves out of a connectable range and disconnects from the audio adapter, if not, go back to the step (k), if so, perform the next step (m); (m) Switch to play the audio signal using the built-in audio device.

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