Transmission Method, Mobile Terminal, Multi-Channel Headset, and Audio Play System

• US 20160157008A1
• Filed: 04/21/2015
• Published: 06/02/2016
• Est. Priority Date: 04/29/2014
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zhang, Zhiqiang, JIANG, Jianhui
• Granted Patent: US 9,788,096 B2
• Time in Patent Office: Days
• CPC Class Codes: H04R 1/1041 Mechanical or electronic switches, or control elements switches in general H01H
• CPC Class Codes: H04R 2420/05 Detection of connection of loudspeakers or headphones to amplifiers
• CPC Class Codes: H04R 2420/07 Applications of wireless loudspeakers or wireless microphones
• CPC Class Codes: H04R 3/12 for distributing signals to two or more loudspeakers specially adapted for hearing aids H04R25/407
• CPC Class Codes: H04R 5/033 Headphones for stereophonic communication details thereof, e.g. relating to batteries, cables or control elements H04R1/10
• CPC Class Codes: H04R 5/04 Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments combinations of amplifiers H03F3/68; stereophonic systems H04S
• CPC Class Codes: H04S 3/008 in which the audio signals are in digital form, i.e. employing more than two discrete digital channels data reduction aspects thereof based on psychoacoustics G10L19/02

Abstract

A transmission method, applied to a mobile terminal provided with a headset interface, is disclosed, where the method includes determining a type of a headset connected to the headset interface. If the headset is a multi-channel headset, an audio digital signal is transmitted to the headset using the headset interface. If the headset is not a multi-channel headset, an audio analog signal is transmitted to the headset using the headset interface. Further disclosed are a mobile terminal, a multi-channel headset, and an audio play system.

Claims

1-40. -40. (canceled)

41. A mobile terminal, comprising:

a processor;

a digital-to-analog converter;

a first switching circuit; and

a headset interface,

wherein the first switching circuit is connected to the headset interface,

wherein the processor is configured to decode an audio file to obtain an audio digital signal, determine a type of a headset connected to the headset interface, generate a first switching instruction according to the type of the headset, and transmit the first switching instruction to the first switching circuit, wherein the first switching instruction carries indication information used to instruct the first switching circuit to transmit the audio digital signal to the headset interface when the headset is a multi-channel headset,

wherein the first switching instruction carries indication information used to instruct the first switching circuit to transmit an audio analog signal to the headset interface when the headset is not a multi-channel headset,

wherein the digital-to-analog converter is configured to receive the audio digital signal from the processor and convert the audio digital signal into the audio analog signal,

wherein the first switching circuit is configured to receive the first switching instruction and transmit the audio digital signal or the audio analog signal to the headset interface according to the first switching instruction, and

wherein the headset interface is configured to transmit the audio digital signal to the headset or transmit the audio analog signal to the headset.

42. The mobile terminal according to claim 41, wherein the digital-to-analog converter is connected to the processor and the first switching circuit.

43. The mobile terminal according to claim 42, wherein the processor is further configured to pack the audio digital signal into an audio data packet and directly send the audio data packet to the headset interface using the first switching circuit, and wherein the headset interface is configured to transmit the audio data packet to the headset.

44. The mobile terminal according to claim 43, wherein the processor is further configured to perform DOLBY sound processing or DIGITAL THEATER SYSTEM sound processing on the audio digital signal, after obtaining the audio digital signal by means of decoding and before packing the audio digital signal into the audio data packet.

45. The mobile terminal according to claim 41, wherein the first switching circuit is configured to transmit the audio digital signal or the audio analog signal to a sound channel pin of the headset interface.

46. The mobile terminal according to claim 41, wherein the mobile terminal further comprises:

a voice processor;

a power supply; and

a second switching circuit,

wherein the voice processor is configured to process sound information received from a microphone pin of the headset interface,

wherein the processor is further configured to output a second switching instruction to the second switching circuit according to the type of the headset connected to the headset interface, wherein the second switching instruction instructs the second switching circuit to connect the power supply and the microphone pin of the headset interface when the headset is a multi-channel headset,

wherein the second switching instruction instructs the second switching circuit to connect the voice processor and the microphone pin of the headset interface when the headset is not a multi-channel headset, and

wherein the second switching circuit is connected to the microphone pin of the headset interface and is configured to receive the second switching instruction and switch the microphone pin of the headset interface according to the second switching instruction, such that the microphone pin of the headset interface is connected to the voice processor or the power supply.

47. The mobile terminal according to claim 41, wherein the headset interface is a wired connection interface, wherein the mobile terminal further comprises a headset identification circuit, wherein the headset identification circuit is connected to the processor and is configured to detect ground impedance of a headset pin or a voltage value of a voltage detection point disposed on a headset pin when the headset is inserted into the headset interface, and wherein the processor is further configured to identify the type of the headset according to the ground impedance or the voltage value.

48. The mobile terminal according to claim 41, wherein the headset interface is a wireless connection interface, and wherein the processor is further configured to receive headset type indication information sent by the headset and determine the type of the headset according to the headset type indication information.

49. The mobile terminal according to claim 41, further comprising an input interface configured to receive headset type indication information entered by a user, wherein the processor is further configured to:

acquire the headset type indication information; and

determine the type of the headset according to the headset type indication information.

50. The mobile terminal according to claim 41, wherein the processor decodes the audio file to obtain the audio digital signal after identifying the type of the headset and sending the first switching instruction.

51. The mobile terminal according to claim 41, wherein the headset interface is a 3.5 millimeter (mm)/2.5 mm headset jack, wherein the headset jack comprises a left channel pin and a right channel pin, wherein the first switching circuit comprises an analog switch, wherein a power input pin of the analog switch is connected to a working voltage, wherein a ground pin of the analog switch is grounded, wherein a switching control pin of the analog switch is connected to a first signal output pin of the processor of the mobile terminal and is configured to receive the first switching instruction output by the processor, wherein an output end of a first data output pin of the analog switch is connected to the left channel pin of the headset interface of the mobile terminal, wherein an output end of a second data output pin of the analog switch is connected to the right channel pin of the headset interface of the mobile terminal, wherein the analog switch further comprises a first data input pin, a second data input pin, a third data input pin, and a fourth data input pin, wherein an input end of the first data input pin and an input end of the second data input pin are configured to receive the audio digital signal or the audio data packet, wherein input ends of the third data input pin and the fourth data input pin are configured to receive the audio analog signal, wherein an input end of the first data output pin and an input end of the second data output pin are respectively connected to an output end of the first data input pin and an output end of the second data input pin when an audio digital signal or an audio data packet needs to be output, and wherein the input end of the first data output pin and the input end of the second data output pin are respectively connected to an output end of the third data input pin and an output end of the fourth data input pin when an audio analog signal needs to be output.

52. The mobile terminal according to claim 46, wherein the headset interface is a 3.5 mm/2.5 mm headset jack, wherein the second switching circuit comprises a first p-channel metal-oxide-semiconductor (PMOS) transistor and a second PMOS transistor, wherein a gate of the first PMOS transistor is connected to the microphone pin of the headset interface of the mobile terminal, wherein a source of the first PMOS transistor is connected to the voice processor, wherein a drain of the first PMOS transistor is connected to a second signal output pin of the processor of the mobile terminal, wherein the second signal output pin is configured to output a level signal, so as to control on or off of the first PMOS transistor, wherein a gate of the second PMOS transistor is connected to the microphone pin of the headset interface of the mobile terminal, wherein a source of the second PMOS transistor is connected to the power supply, wherein a drain of the second PMOS transistor is connected to a third signal output pin of the processor of the mobile terminal, and wherein the third signal output pin is configured to output a level signal, so as to control on or off of the second PMOS transistor.

53. A transmission method, applied to a mobile terminal provided with a headset interface, wherein the method comprises:

determining a type of a headset connected to the headset interface;

transmitting an audio digital signal to the headset using the headset interface when the headset is a multi-channel headset; and

transmitting an audio analog signal to the headset using the headset interface when the headset is not a multi-channel headset.

54. The method according to claim 53, further comprising decoding a to-be-processed audio file to obtain the audio digital signal, wherein transmitting the audio digital signal to the headset comprises:

packing the audio digital signal into an audio data packet; and

transmitting the audio data packet to the headset using the headset interface.

55. The method according to claim 54, wherein, before the packing of the audio digital signal into the audio data packet, the method further comprises performing DOLBY sound processing or DIGITAL THEATER SYSTEM sound processing on the audio digital signal, wherein packing the audio digital signal into the audio data packet comprises packing the audio digital signal obtained after DOLBY sound processing or DIGITAL THEATER SYSTEM sound processing is performed into the audio data packet.

56. The method according to claim 53, wherein when the audio digital signal or the audio analog signal is transmitted to the headset using the headset interface, the transmission is performed using a sound channel pin of the headset interface.

57. The method according to claim 53, wherein determining the type of the headset connected to the headset interface comprises, when the headset is inserted into the headset interface, detecting ground impedance of a headset pin or a voltage value of a voltage detection point disposed on a headset pin, and identifying the type of the headset according to the ground impedance or the voltage value.

58. The method according to claim 53, wherein determining the type of the headset connected to the headset interface comprises receiving headset type indication information entered by a user or sent by the headset, and determining the type of the headset according to the headset type indication information.