CN113973141A

CN113973141A - Protective shell, signal processing method, mobile device and electronic device

Info

Publication number: CN113973141A
Application number: CN202010713259.6A
Authority: CN
Inventors: 杨枭; 朱梦尧; 刘鑫; 冯建婷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2022-01-25
Anticipated expiration: 2040-07-22
Also published as: WO2022017258A1; CN113973141B

Abstract

The embodiment of the application provides a protective shell, a signal processing method, mobile equipment and electronic equipment. A plurality of recording devices and a plurality of sound inlet channels corresponding to the recording devices are arranged in the protective shell and used for collecting external sound signals, and therefore the protective shell has a recording function. In addition, the protective shell also comprises a first interface used for transmitting the obtained sound signal to the mobile equipment, so that the mobile equipment can process the sound signal conveniently, and the recording performance of the mobile equipment is greatly improved; moreover, the protective shell can be fixed on the mobile device for a long time, so that the protective shell can be directly used for recording when recording is needed, a user can carry the protective shell conveniently, and the user experience can be greatly improved.

Description

Protective shell, signal processing method, mobile device and electronic device

Technical Field

The application relates to the field of acoustics, in particular to a protective shell, a signal processing method, a mobile device and an electronic device.

Background

Currently, mobile devices such as mobile phones are becoming the main devices for video shooting. The functions of the mobile phone are increasingly complicated, and various applications are supported, the layout of the microphone on the mobile phone must meet the requirements of various applications, and the microphone cannot be configured specifically for shooting and recording, so that the recording effect of the video of the mobile phone is still a certain gap compared with that of professional equipment.

The mobile device is limited by the influence of the volume and other functional applications of mobile devices such as mobile phones, and microphones with large volume or large quantity cannot be installed in the mobile device, so that in order to improve the recording performance of the mobile device, a professional recording accessory can be designed for the mobile device.

Therefore, it is desirable to provide a recording accessory that not only improves the recording performance of the mobile device, but is also portable.

Disclosure of Invention

The embodiment of the application provides a protective housing, a signal processing method, mobile equipment and electronic equipment, and the protective housing not only has a recording function, but also can transmit an obtained sound signal to the mobile equipment by arranging a plurality of recording devices, a plurality of sound inlet channels corresponding to the plurality of recording devices and a first signal for transmitting the signal in the protective housing, so that the mobile equipment can process the sound signal, and the recording performance of the mobile equipment is greatly improved. In addition, the protective shell can be fixed on the mobile device for a long time, so that the protective shell is convenient for a user to carry, and the user experience can be greatly improved.

In a first aspect, a protective case is provided, which is used for being fixedly connected with a mobile device, and includes a protective case body, N sound recording devices arranged on the protective case body, and a first interface, wherein,

the protective shell body is provided with N sound inlet channels, the N sound inlet channels correspond to the N recording devices one by one, one end of each sound inlet channel is communicated with the corresponding recording device, and N is an integer greater than 1;

the first interface is connected with the N sound recording devices and is used for transmitting sound signals obtained through the sound inlet channel and the corresponding sound recording devices to the mobile equipment.

The mobile device can be sleeved on the protective shell to achieve fixed connection between the protective shell and the mobile device.

According to the protective shell provided by the embodiment of the application, the protective shell is internally provided with N recording devices and N corresponding sound inlet channels and used for collecting external sound signals, so that the protective shell has a recording function, and in addition, the protective shell also comprises a first interface which is used for transmitting the obtained sound signals to the mobile equipment, so that the mobile equipment can process the sound signals, and the recording performance of the mobile equipment is greatly improved; moreover, the protective shell can be fixed on the mobile device for a long time, so that the protective shell can be directly used for recording when recording is needed, a user can carry the protective shell conveniently, and the user experience can be greatly improved.

With reference to the first aspect, in certain implementations of the first aspect, the N sound inlet channels include a first portion and a second portion, the sound inlet hole formed at the other end of the sound inlet channel in the first portion faces the front side of the protective shell, and the sound inlet hole formed at the other end of the sound inlet channel in the second portion faces the rear side of the protective shell.

The front side and the rear side of the protective case are opposite sides distributed along the thickness direction of the protective case. The front side of the protective case is oriented in the same direction as the front side of the mobile device, and the rear side of the protective case is oriented in the same direction as the rear side of the mobile device.

When the protective shell is fixedly connected with the mobile device, when the mobile device is normally used, the front side of the mobile device and the front side of the protective shell face the user, and correspondingly, the rear side of the mobile device and the rear side of the protective shell face away from the user.

It will be appreciated that the first portion may include one or more sound inlet channels and the second portion may also include one or more sound inlet channels.

The protective housing that this application embodiment provided sets up the orientation of the sound inlet hole through with the sound inlet channel respectively into the front side and the rear side of orientation protective housing, can gather the sound signal that is located the front side and the rear side of protective housing well, has adapted to the habit of the handheld mobile device of user, has satisfied the demand of most recording scenes.

With reference to the first aspect, in certain implementation manners of the first aspect, the sound inlet channel in the first portion includes a first channel, a second channel, and a third channel, two ends of the second channel are respectively communicated with the first channel and the third channel, a sound inlet hole formed at one end of the first channel faces the front side of the protective shell, and one end of the third channel is communicated with a corresponding sound recording device, wherein,

the first channel and the third channel are parallel to the thickness direction of the protective shell body, and the second channel is perpendicular to the thickness direction of the protective shell body.

The protective housing that this application embodiment provided, through setting up the sound inlet channel including three passageway, the design of sound inlet hole towards the front side of protective housing, simple structure that have realized sound inlet channel.

With reference to the first aspect, in certain implementations of the first aspect, the cover plate is disposed on the back surface of the protective shell body and on one side of an area, closest to the back surface of the protective shell body, of the sound inlet passage.

In some embodiments, the cover plate is disposed on the back of the protective shell body and on one side of the second channel to cover the second channel, so as to form the closed sound inlet channel.

That is, in this embodiment, the area closest to the back surface of the protective case body in the sound intake passage is the second passage.

The protective housing that this application embodiment provided, for the convenience of processing, can process the sound inlet channel that has three-section passageway on the protective housing body earlier, nevertheless, the second passageway that is closest to the back of protective housing body can expose, sets up the apron through the back at the protective housing body and the region that is located one side of second passageway, can prevent that outside impurity from getting into in the protective housing, improves the waterproof dustproof effect of protective housing. In a word, the cover plate is arranged on the back face of the protective shell body and in the area on one side of the second channel, so that the waterproof and dustproof effects of the protective shell can be guaranteed as far as possible while the design of the sound inlet channel comprising three channels can be simply and conveniently realized.

With reference to the first aspect, in certain implementations of the first aspect, the sound inlet channel in the second portion is parallel to a thickness direction of the protective case body.

That is, the sound intake passage in the second portion is a straight passage arranged in parallel with the thickness direction of the protective case body.

The protective housing that this application embodiment provided sets up the sound inlet channel through the rear side that will advance the sound hole towards the protective housing into the straight channel that sets up with the thickness direction parallel arrangement of protective housing body, can shorten the route of sound inlet channel, is favorable to reducing the loss of sound, reduces the distortion of the sound that leads to because the resonance, and has practiced thrift the inner space of protective housing body.

With reference to the first aspect, in certain implementations of the first aspect, the protective case further includes a seal disposed between the sound inlet channel and the corresponding sound recording device.

The protective housing that this application embodiment provided, the sealing member that sets up between sound inlet channel and recording device can prevent effectively that outside impurity from entering into the protective housing inside, improves the waterproof dirt-proof effect of protective housing.

With reference to the first aspect, in certain implementations of the first aspect, the first interface is further configured to electrically connect with the mobile device. In this way, a wired connection of the protective case to the mobile device may be achieved.

In some embodiments, the first interface is a first USB interface, and the first USB interface extends out of the protective case body and is used for being inserted into the mobile device.

According to the protective shell provided by the embodiment of the application, the first interface used for being connected with the mobile device is set to be the USB interface supporting the USB protocol, so that the protective shell can be well matched with most of existing mobile devices supporting the USB protocol, and the protective shell has good universality.

With reference to the first aspect, in certain implementation manners of the first aspect, the protective case further includes a second USB interface disposed on the protective case body, and is used to connect with a charging device or an external device.

The protective housing that this application embodiment provided through set up the second USB interface on the protective housing body, can be connected with battery charging outfit for the protective housing power supply also can be connected with external equipment to transmit data between protective housing and external equipment.

In some embodiments, the protective case further comprises a USB hub disposed on the protective case body, the USB hub being connected to the second USB interface,

the mobile device is connected with a charging device or an external device through the second USB interface and the first USB interface.

The protective housing that this application embodiment provided, the USB concentrator with second USB interface connection that sets up on the protective housing can expand the USB interface of mobile device for not only supporting the interface of protective housing, also supports other equipment of battery charging outfit or external device, and the second USB interface uses with first USB interface combination to supply power or transmit data between mobile device and external equipment for the mobile device more conveniently through second USB interface and first USB interface. In addition, the setting of second USB interface can avoid additionally setting up the trompil that is used for dodging the third USB interface of mobile device on the protective housing, and the appearance is pleasing to the eye relatively, and dustproof and waterproof effect also can be improved to a small amount of trompils.

With reference to the first aspect, in certain implementations of the first aspect, the first interface is a first wireless communication module. In this way, a wireless connection between the protective case and the mobile device may be achieved.

With reference to the first aspect, in certain implementations of the first aspect, the protective case further includes a wireless power supply module to supply power to the protective case.

In some embodiments, the wireless power module is a wireless charging coil.

With reference to the first aspect, in certain implementation manners of the first aspect, the protective case further includes a processing unit disposed on the protective case body, and is configured to combine N sound signals collected by the N sound recording devices into M groups of sound signals, where one sound recording device is configured to collect one sound signal, and M is an integer smaller than N.

According to the protective housing provided by the embodiment of the application, the protective housing is combined and processed through N paths of sound signals, the combined sound signals are sent to the mobile device, the sound signals can be transmitted through a high code rate, and the transmission efficiency is improved.

In some embodiments, the sampling rate of each of the M groups of sound signals is greater than the sampling rate of each of the N sound signals.

In some embodiments, M ═ 2.

With reference to the first aspect, in certain implementations of the first aspect, the processing unit is further configured to:

receiving a first instruction from the mobile device;

and controlling the protective shell to be in a low power consumption mode according to the first instruction.

According to the protective shell provided by the embodiment of the application, when the mobile device does not need to record, the protective shell can be controlled to be in the low power consumption mode by receiving the first instruction from the mobile device, and the power consumption of the protective shell is effectively saved.

receiving a second instruction from the mobile device;

and controlling the protective shell to be switched to a recording mode from the low power consumption mode according to the second instruction.

With reference to the first aspect, in certain implementations of the first aspect, the low power consumption mode includes: the recording device is in a power-off state, or the recording device is in a low-frequency working mode.

In a second aspect, a method for signal processing is provided, which is applied in a mobile device, and the method includes:

receiving M groups of sound signals from a protective shell of the mobile device, wherein M is an integer greater than 1;

performing de-combination processing on the M groups of sound signals to obtain N paths of sound signals, wherein N is an integer greater than M;

and carrying out recording algorithm processing on the N paths of sound signals.

In some embodiments, the mobile device and the recording algorithm of the N-way sound signal may include, but are not limited to, a noise reduction process, a distortion reduction process, and a human voice enhancement process on the sound signal.

According to the signal processing method provided by the embodiment of the application, under the condition that the protective shell compresses N paths of sound signals, the mobile device decompresses M groups of sound signals from the protective shell, and performs recording algorithm processing on the N paths of sound signals to obtain high-quality sound signals.

With reference to the second aspect, in certain implementations of the first aspect, the mobile device includes P sound recording devices, P being an integer greater than or equal to 1, and the method further includes:

p sound signals are collected through P sound recording devices, and one sound recording device is used for collecting one sound signal;

carrying out delay alignment on the N paths of sound signals and the P paths of sound signals; and the number of the first and second groups,

and performing recording algorithm processing on the N paths of sound signals, wherein the recording algorithm processing comprises the following steps:

and carrying out recording algorithm processing on the N paths of sound signals and the P paths of sound signals after delay alignment.

In some embodiments, the delay alignment processing of the N-way sound signal by the mobile device includes, but is not limited to, processing the sound signal by using a correlation detection method.

The signal processing method provided by the embodiment of the application realizes the recording performance through the protective shell, and simultaneously records sound by using the recording device in the mobile device per se, so that more sound signals can be obtained, better audio information can be obtained, and better recording performance can be obtained.

With reference to the second aspect, in certain implementations of the first aspect, the method further includes:

and sending a first instruction to the protective shell for indicating that the protective shell is in a low power consumption mode.

According to the signal processing method, when the mobile device does not need to record, the mobile device sends the first instruction to the protective shell, so that the protective shell is in a low power consumption mode, power consumption of the protective shell is effectively saved, and power consumption caused by power supply of the mobile device to the protective shell can be saved.

and sending a second instruction to the protective shell, wherein the second instruction is used for indicating the protective shell to be switched from the low power consumption mode to the recording mode.

With reference to the second aspect, in certain implementations of the first aspect, the sound recording device inside the protective shell is in a power-off state, or the sound recording device inside the protective shell is in a low-frequency operating mode.

In a third aspect, a mobile device is provided, which includes a processing unit configured to:

According to the mobile equipment provided by the embodiment of the application, under the condition that the protective shell compresses N paths of sound signals, the mobile equipment decompresses M groups of sound signals from the protective shell, and performs recording algorithm processing on the obtained N paths of sound signals to obtain high-quality sound signals.

With reference to the third aspect, in certain implementations of the third aspect, the mobile device includes P sound recording devices, one sound recording device is configured to collect one sound signal, and P is an integer greater than or equal to 1;

the processing unit is further configured to perform delay alignment on the N-path sound signals and the P-path sound signals;

the processing unit is specifically configured to perform recording algorithm processing on the N-path sound signals and the P-path sound signals after delay alignment.

The mobile device that this application embodiment provided when realizing the recording performance through the protective housing, still utilizes the recording device in the mobile device of itself to record, can obtain more sound signal to obtain better audio information, obtain better recording performance.

With reference to the third aspect, in certain implementations of the third aspect, the processing unit is further configured to send a first instruction to the protective shell, where the first instruction is used to indicate that the protective shell is in a low power consumption mode.

According to the mobile equipment provided by the embodiment of the application, when the mobile equipment does not need to record, the mobile equipment sends the first instruction to the protective shell, so that the protective shell is in a low power consumption mode, the power consumption of the protective shell is effectively saved, and the power consumption caused by power supply of the mobile equipment to the protective shell can be also saved.

With reference to the third aspect, in certain implementations of the third aspect, the processing unit is further configured to send a second instruction to the protective shell, where the second instruction is used to instruct the protective shell to switch from the low power consumption mode to the recording mode.

With reference to the third aspect, in certain implementations of the third aspect, the low power consumption mode includes: the recording device in the protective shell is in a power-off state, or the recording device in the protective shell is in a low-frequency working mode.

In a fourth aspect, a mobile device is provided, comprising: a processor coupled with a memory, the memory for storing a program that, when executed by the processor, causes an electronic device to perform the steps of:

With reference to the fourth aspect, in some implementations of the fourth aspect, the mobile device includes P sound recording devices, one sound recording device is configured to collect one sound signal, and P is an integer greater than or equal to 1;

the program, when executed by the processor, causes the electronic device to further perform the steps of:

carrying out delay alignment on the N paths of sound signals and the P paths of sound signals;

when executed by the processor, the program causes the electronic device to embody the steps of:

With reference to the fourth aspect, in some implementations of the fourth aspect, the program, when executed by the processor, causes the electronic device to further perform the steps of:

With reference to the fourth aspect, in some implementations of the fourth aspect, the low power consumption mode includes: the recording device in the protective shell is in a power-off state, or the recording device in the protective shell is in a low-frequency working mode.

In a fifth aspect, an electronic device is provided, which includes a mobile device and a protective case, where the protective case is fixedly connected to the mobile device, and the protective case includes: the mobile equipment comprises a protective shell body, N sound recording devices and a first interface, wherein the N sound recording devices and the first interface are arranged on the protective shell body, the mobile equipment comprises a third interface, the third interface is arranged on the protective shell body,

the first interface is connected with the third interface, is connected with the N sound recording devices, and is used for transmitting sound signals obtained through the sound inlet channel and the corresponding sound recording devices to the mobile equipment;

the third interface is used for receiving sound signals from the protective shell.

According to the protective shell provided by the embodiment of the application, the protective shell is internally provided with the N recording devices and the corresponding N sound inlet channels and used for collecting external sound signals, so that the protective shell has a recording function, and in addition, the protective shell also comprises the first interface which is used for transmitting the obtained sound signals to the mobile equipment, so that the mobile equipment can process the sound signals, and the recording performance of the mobile equipment is greatly improved; moreover, the protective shell can be fixed on the mobile device for a long time, so that the protective shell can be directly used for recording when recording is needed, a user can carry the protective shell conveniently, and the user experience can be greatly improved.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the N sound inlet channels include a first portion and a second portion, the sound inlet hole formed at the other end of the sound inlet channel in the first portion faces the front side of the protective shell, and the sound inlet hole formed at the other end of the sound inlet channel in the second portion faces the rear side of the protective shell.

With reference to the fifth aspect, in certain implementation manners of the fifth aspect, the protective case further includes a first processing unit disposed on the protective case body, and configured to combine N sound signals collected by the N sound recording devices into M groups of sound signals, where one sound recording device is configured to collect one sound signal, and M is an integer smaller than N;

the third interface is specifically configured to receive the M groups of sound signals;

the mobile device further comprises a second processing unit, which is used for performing decoding and merging processing on the M groups of sound signals to obtain the N paths of sound signals and performing recording algorithm processing on the N paths of sound signals.

It will be appreciated that the first processing unit within the protective casing may be a processing unit within the protective casing as described above in relation to the first aspect and the second processing unit within the mobile device may be a processing unit within the mobile device as described above in relation to the third aspect.

With reference to the fifth aspect, in certain implementation manners of the fifth aspect, the mobile device further includes P sound recording devices, one sound recording device is used for collecting P sound signals, and P is an integer greater than or equal to 1;

the second processing unit is further configured to perform delay alignment on the N-path sound signals and the P-path sound signals;

the second processing unit is specifically configured to perform recording algorithm processing on the N-path sound signals and the P-path sound signals after delay alignment.

In a sixth aspect, a chip is provided, which includes a processor, and is configured to invoke and execute instructions stored in a memory, so that an electronic device in which the chip is installed executes the method of the second aspect.

In a seventh aspect, a computer storage medium is provided, comprising: a processor coupled to a memory, the memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of the second aspect described above.

Drawings

Fig. 1 is a schematic structural view of a protective case provided in an embodiment of the present application.

Fig. 2 is a schematic structural view of the back surface of the protective case provided in an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of the structure shown in fig. 1 at section a-a.

Fig. 4 is a schematic cross-sectional view of the structure shown in fig. 2 at section B-B.

Fig. 5 is a schematic structural view of a protective case provided in another embodiment of the present application.

Fig. 6 and 7 are schematic cross-sectional views of a protective case provided in another embodiment of the present application.

Fig. 8 is a schematic block diagram of a protective case provided in another embodiment of the present application.

Fig. 9 is a schematic block diagram of a protective case provided in another embodiment of the present application.

Fig. 10 is a schematic structural view of a protective case provided in another embodiment of the present application.

Fig. 11 and 12 are schematic block diagrams of a protective case provided in another embodiment of the present application.

Fig. 13 is a schematic block diagram of a mobile device provided by an embodiment of the present application.

Fig. 14 is a schematic flow chart of a method of signal processing provided by an embodiment of the present application.

Fig. 15 is a schematic block diagram of a mobile device provided in another embodiment of the present application.

Description of reference numerals:

the protective shell 10, the mobile device 20 and the mobile device 30.

The mobile device comprises a protective shell body 11, a front shell body 11A, a rear shell body 11B, a containing groove 111 for containing the mobile device, an opening 112, a camera hole 113, a first side surface 1101, a second side surface 1102, a front surface 1103, a back surface 1104, a sound inlet channel 114A, a sound inlet hole 114A-1, a first channel 114A-2, a second channel 114A-3, a third channel 114A-4, a sound inlet channel 114B and a sound inlet hole 114B-1 of the sound inlet channel 114B.

A recording device 12, a recording device 12A connected to the sound intake passage 114A, a recording device 12B connected to the sound intake passage 114B, a circuit assembly 13, a cover plate 14, and a sealing member 15.

The wireless power supply device comprises a first interface 161, a first USB interface 1611, a second USB interface 1621, a wireless power supply module 1622 and a processing unit 17.

The device comprises a processing unit 210, a de-combination module 211, a delay alignment module 212, a recording algorithm module 213, a recording device 220, a third interface 201 and a third USB interface 2011.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Aiming at the problems of poor recording performance and inconvenient carrying of recording accessories of mobile equipment such as a mobile phone and the like in the prior art, the embodiment of the application provides a protective shell suitable for the mobile equipment, the protective shell can be sleeved on the mobile equipment, an acoustic structure comprising a plurality of recording devices and a plurality of corresponding sound inlet channels is arranged in the protective shell and used for collecting external sound signals, and therefore the protective shell has a recording function; moreover, the protective shell can be fixed on the mobile device for a long time, so that the protective shell can be directly used for recording when recording is needed, a user can carry the protective shell conveniently, and the user experience can be greatly improved.

The protective shell of the embodiment of the application can be applied to various portable mobile devices, and the mobile devices can be mobile phones, tablet computers, wearable devices or the like.

In this embodiment, on the one hand, an acoustic structure for collecting a sound signal needs to be designed on the protective shell, on the other hand, the protective shell needs to communicate with the mobile device, and, in some embodiments, the protective shell may process the collected sound signal, and the like.

Hereinafter, the embodiments of the present application will be described from the above two aspects. First, with reference to fig. 1 to 7, a design of an acoustic structure of the protective case is described, and next, with reference to fig. 8 to 12, a process of processing a sound signal by the protective case and a signal transmission process between the protective case and the mobile device are described in detail.

In the following description of the protective case, reference is made many times to a protective case body on which various structures can be provided and various devices mounted to form the protective case. In the following, some terms of the embodiments of the present application are described with reference to the protective shell body.

The embodiment of the application defines the coordinate system of the drawing. Two liang of perpendicularities in x direction, y direction and z direction, the thickness direction of protective housing body can be understood to the z direction, and the width direction of protective housing body can be understood to the y direction, and the length direction of protective housing body can be understood to the x direction, or, the length direction of protective housing body can be understood to the y direction, and the width direction of protective housing body can be understood to the x direction. For example, in the embodiment of the present application, the structure of the protective case is described by taking the y direction as the length direction of the protective case body and the x direction as the width direction of the protective case body as an example.

Note that the thickness direction, the length direction, and the width direction of the protective case body described above may also be referred to as the thickness direction, the length direction, and the width direction of the protective case.

The embodiment of the application also defines six faces of the protective shell body, and the six faces are respectively as follows: a front surface and a back surface which are oppositely arranged along the z direction (the thickness direction of the protective shell body), and four side surfaces which are connected with the front surface and the back surface. The front side of the protective case body can be understood as a surface facing the same as the screen of the mobile device, and when the mobile device is normally used, the screen of the mobile device and the front side of the protective case body both face the user, and correspondingly, when the mobile device is normally used, the back side of the protective case body faces away from the user. Four side surfaces of the protective shell body are connected in sequence, and for convenience of description, the four side surfaces are respectively referred to as a first side surface, a second side surface, a third side surface and a fourth side surface, wherein the first side surface and the second side surface are oppositely arranged, and the third side surface and the fourth side surface are oppositely arranged. In this case, the first side and the second side may be disposed opposite to each other along the y direction (for example, the length direction of the protective case body), and the third side and the fourth side may be disposed opposite to each other along the x direction (for example, the width direction of the protective case body), or the first side and the second side may be disposed opposite to each other along the x direction, and the third side and the fourth side may be disposed opposite to each other along the y direction. For convenience of description, the protective case of the embodiment of the present application is described with the first side and the second side being disposed opposite to each other along the y direction, and the third side and the fourth side being disposed opposite to each other along the x direction.

In addition, this application embodiment has still defined the front side, the rear side of protective housing body, first side, second side, third side and fourth side. The front side and the rear side are two sides of the protective shell body in the z-direction distribution, the front side can be understood as a side facing the front surface of the protective shell body, the rear side can be understood as a side facing the rear surface of the protective shell body, the first side and the second side are two sides of the protective shell body in the y-direction, and the third side and the fourth side are two sides of the protective shell body in the x-direction distribution.

It should be noted that the front side, the rear side, the first side, the second side, the third side, and the fourth side of the protective shell body described above may also be referred to as the front side, the rear side, the first side, the second side, the third side, and the fourth side of the protective shell.

Referring to fig. 1 and 2, the protective case 10 includes a protective case body 11, an accommodating groove 111 is provided on the protective case body 11, the circumference of the accommodating groove 111 is enclosed by the protective case body 11, and the mobile device can be sleeved in the accommodating groove 111 to protect the mobile device. The opening 112 is further disposed on the protective shell body 11, and when the protective shell 10 is mounted on a mobile device, the opening 112 avoids a sound inlet channel of the mobile device, so that an external sound signal enters the interior of the mobile device through the opening 112 and the sound inlet channel of the mobile device to obtain the sound signal. It should be understood that the location and number of apertures 112 may be configured for different types of mobile devices. Illustratively, the opening 112 may be provided at the first side 1101 of the protective case body 11, or the opening 112 may be provided at the second side 1102 of the protective case body 11. Illustratively, the protective case body 11 includes one or more apertures 112, for example, the protective case body 11 shown in fig. 1 and 2 may include two apertures 112, and the two apertures 112 are respectively disposed on the first side 1101 and the second side 1102 of the protective case body 11.

With reference to fig. 3 and 4, the protective casing 10 further includes a circuit assembly 13 fixedly connected in the protective casing body 11, and the circuit assembly 13 is electrically connected with various devices, for example, the devices may be soldered on the circuit assembly 13.

In some embodiments, for ease of manufacture and assembly, the protective case body 11 may be composed of two parts, referring to fig. 3 and 4, which may be defined as a front case body 11A and a rear case body 11B, respectively, and the front case body 11A and the rear case body 11B may be fixedly connected by, for example, welding or bonding. The front housing body 11A is provided with a receiving groove 111, the front housing body 11B is internally fixed with a circuit assembly 13, and the rear housing body 11B can be used for protecting the circuit assembly 13 and various devices electrically connected to the circuit assembly 13.

With continued reference to fig. 1 and 2, the protective case body 11 is provided with a plurality of sound intake passages 114, and the protective case 11 includes a plurality of sound recording devices 12, and the plurality of sound recording devices 12 are mounted in the protective case body 11. The plurality of sound inlet channels 114 correspond to the plurality of sound recording devices 12 one to one, one sound inlet channel 114 corresponds to one sound recording device 12, one end of the sound inlet channel 114 is communicated with the corresponding sound recording device 12, and the other end of the sound inlet channel 114 forms a sound inlet hole facing the outer side of the protective shell body 11. Here, the sound inlet channel 114 and the corresponding sound recording device 12 may form an acoustic structure for collecting external sound signals.

In the embodiment of the present application, the sound inlet passage 114 may be provided in any region of the protective case body 11, and the orientation of the sound inlet hole formed at the other end of the sound inlet passage 114 may be any as long as it can receive an external sound signal.

Based on the habit of holding the mobile device by the user, the sound signals distributed on the front side or the rear side of the mobile device or the sound signals distributed on the front side and the rear side of the mobile device are collected as much as possible. Then, for the protective case 11 fixed to the mobile device, similarly, the sound signals distributed on the front side or the rear side of the protective case 11, or the sound signals distributed on the front side and the rear side of the protective case 11 are collected as much as possible.

In the embodiment of the present application, in order to collect sound signals distributed on the front side and the rear side of the protective case 11 as much as possible, the sound inlet holes of a part of the sound inlet channels 114 in the plurality of sound inlet channels 114 face the front side of the protective case 11, and the part is referred to as a first part, and the sound inlet holes of another part of the sound inlet channels 114 face the rear side of the protective case 11, and the part is referred to as a second part. For convenience of description, the sound intake channel 114 in the first portion is referred to as a sound intake channel 114A, the sound recording device 12 corresponding to the sound intake channel 114A is referred to as a sound recording device 12A, the sound intake channel 114 in the second portion is referred to as a sound intake channel 114B, and the sound recording device 12 corresponding to the sound intake channel 114B is referred to as a sound recording device 12B.

Referring to fig. 1 and 2, the first portion may include one or more sound inlet channels 114A, and the second portion may include one or more sound inlet channels 114B, without any limitation thereto. For example, in fig. 1 and 2, the first portion may include 2 sound input channels 114A, and the second portion may include 8 sound input channels 114B.

The number of sound intake channels 114A of the first portion and the number of sound intake channels 114B of the second portion may be based on a scene design of the sound recording. For example, in a scene in which a video is captured, the scene in which a user captures a video on the rear side of the mobile device may be more than the scene in which the user captures a video on the front side of the mobile device, and then, the number of sound inlet channels 114A of the first portion may be designed to be small, and the number of sound inlet channels 114B of the second portion may be designed to be large, as shown in fig. 1 and 2. For another example, in a scenario of telephone recording, the number of sound inlet channels 114A of the first portion may be designed to be larger, and the number of sound inlet channels 114B of the second portion may be designed to be smaller.

In an embodiment where the first portion includes a plurality of sound inlet channels 114A, the plurality of sound inlet channels 114A are spaced apart. In order to facilitate processing of sound signals collected by the respective sound intake channels 114A and the corresponding sound recording devices 12A and reduce the amount of calculation for the processing, illustratively, the plurality of sound intake channels 114A may be symmetrically disposed, for example, two sound intake channels 114A shown in fig. 1 and 2 are symmetrically disposed along the x direction. Furthermore, in order to collect sound signals with differences, the distance between any two sound inlet channels 114A in the plurality of sound inlet channels 114A is not too close, for example.

Referring to fig. 3, one end of the sound intake passage 114A in the first portion communicates with the corresponding recording device 12A, and the other end of the sound intake passage 114A forms a sound intake hole 114A-1, the sound intake hole 114A-1 facing the front side of the protective case 10, wherein the sound intake hole 114A-1 is provided on the front face 1103 of the protective case body 11.

In the embodiment in which the sound inlet hole 114A-1 of the sound inlet passage 114A is directed toward the front side of the protective case 10, the sound inlet passage 114A may be composed of a multi-stage passage in consideration of the position of the recording device 12A, the degree of processing difficulty, and the like.

In some embodiments, with continued reference to fig. 3, the sound inlet channel 114A includes a first channel 114A-2, a second channel 114A-3, and a third channel 114A-4, two ends of the second channel 114A-3 are respectively communicated with the first channel 114A-2 and the third channel 114A-4, one end of the first channel 114A-2 forms a sound inlet hole 114A-1, the sound inlet hole 114A-1 faces the front side of the protective case 10, and the other end of the third channel 114A-4 is communicated with the corresponding sound recording device 12A.

In this embodiment, the first passage 114A-2 and the third passage 114A-4 are exemplarily parallel to the thickness direction (z direction) of the protective case body 11, and the second passage 114A-3 is perpendicular to the thickness direction (z direction) of the protective case body 11.

With continued reference to fig. 3, in an embodiment where the protective case body 11 includes a front case body 11A and a rear case body 11B, the second channel 114A-3 is disposed on the rear case body 11B, the first channel 114A-2 communicates with the second channel 114A-3 and extends to the front surface 1103 of the front case body 11A, and the third channel 114A-4 communicates with the second channel 114A-3 and extends to the sound recording device 12A.

It should be noted that the first passage 114A-2 is parallel to the thickness direction of the protective shell body 11, which means that the central axis of the first passage 114A-2 is parallel to the thickness direction of the protective shell body 11, or the extending direction of the first passage 114A-2 is parallel to the thickness direction of the protective shell body 11. Similarly, the explanation that the third passage 114A-4 is parallel to the thickness direction of the protective case body 11 is the same as the explanation that the first passage 114A-2 is parallel to the thickness direction of the protective case body 11. The second passage 114A-3 is perpendicular to the thickness direction of the protective case body 11, which means that the center axis of the second passage 114A-3 is perpendicular to the thickness direction of the protective case body 11, or in other words, the extending direction of the second passage 114A-3 is perpendicular to the thickness direction of the protective case body 11.

It should be understood that the first and third channels 114A-2 and 114A-4 may not be parallel to the thickness direction of the protective shell body 11, and the second channel 114A-3 may be perpendicular to the thickness direction of the protective shell body 11, which is not limited herein. For example, the first channel 114A-2 may extend to the front face 1103 of the protective shell body 11 along any direction to form a sound inlet hole 114A-1 located on the front face 1103, the third channel 114A-4 may extend to the corresponding sound recording device 12A along any direction, and two ends of the second channel 114A-3 are respectively communicated with the first channel 114A-2 and the third channel 114A-4.

It should be further understood that the sound inlet passage 114A may not have the above-mentioned three-passage combination structure, for example, the sound inlet passage 114A may include a first passage 114A-2 and a second passage 114A-3 which are communicated with each other, and the third passage 114A-4 is not required, wherein the sound inlet hole 114A-1 formed at one end of the first passage 114A-2 faces the front side of the protective case 10, and one end of the second passage 114A-3 is communicated with the sound recording device 12A.

In the embodiment where the sound inlet passage 114A includes multiple passages, one of the sound inlet passages 114A is closest to the back surface 1104 of the protective shell body 11, and taking the structure shown in fig. 3 as an example, the second passage 114A-3 is closest to the back surface 1104. When the sound inlet passage 114A is provided, for convenience of processing, the sound inlet passage 114A may be processed on the protective case body 11, however, a section of the passage closest to the back surface 1104 is exposed, and the waterproof and dustproof effects of the protective case 10 are not good, which affects devices in the protective case 10. Therefore, the cover plate 14 may be provided on the rear surface 1104 of the protective case body 11 to form the closed sound intake passage 114A. Illustratively, the cover 14 may be bonded to the back surface 1104.

Continuing with the example structure shown in fig. 3, the sound inlet channel 114A includes three channels, the second channel 114A-3 is closest to the back 1104, and the cover plate 14 is disposed on the back 1104 and on one side of the second channel 114A-3 to cover the second channel 114A-3 to form the closed sound inlet channel 114A.

In the present embodiment, the sound inlet hole 114A-1 of the sound inlet passage 114A may be provided in any region other than the inner wall of the accommodation groove 111 in the front face 1103 of the protective case body 11. Exemplarily, referring to fig. 1, the sound inlet holes 114A-1 of the sound inlet passage 114A are provided in one or both end regions distributed in the x direction in the front face 1103; exemplarily, referring to fig. 5, the sound inlet holes 114A-1 of the sound inlet passage 114A are provided in one or both end regions distributed in the y direction in the front face 1103.

Referring to fig. 4, one end of the sound intake passage 114B in the second portion communicates with the corresponding recording device 12B, and the other end of the sound intake passage 114B forms a sound intake hole 114B-1, the sound intake hole 114B-1 facing the rear side of the protective case 10, wherein the sound intake hole 114B-1 is provided on the rear surface 1104.

In some embodiments, with continued reference to fig. 4, the sound intake passage 114B is parallel to the thickness direction (z direction) of the protective case body 11. That is, the sound inlet passage 114B is a straight passage provided in parallel with the thickness direction of the protective case body 11. Thus, the path of the sound inlet passage 114B can be shortened, which is advantageous for reducing the loss of sound, reducing the distortion of sound due to resonance, and saving the internal space of the protective case body 11. Further, since the sound inlet hole 114B-1 of the sound inlet passage 114B is provided in the back surface 1104 of the protective case body 11, it is easy to provide a straight passage parallel to the thickness direction of the protective case body 11.

With continued reference to fig. 4, in an embodiment where the protective case body 11 includes a front case body 11A and a rear case body 11B, the sound inlet passage 114B may be provided on the rear case body 11B and extend to the rear surface 1104, with the sound inlet hole 114B-1 being formed on the rear surface 1104.

It should be noted that the sound inlet passage 114B is parallel to the thickness direction of the protective shell body 11, and it is indicated that the central axis of the sound inlet passage 114B is parallel to the thickness direction of the protective shell body 11, or the extending direction of the sound inlet passage 114B is parallel to the thickness direction of the protective shell body 11.

It should be understood that the above-mentioned orientation of the sound inlet holes of the sound inlet channel 114 is only a schematic illustration, and the embodiments of the present application are not limited thereto.

Illustratively, the sound inlet holes of the plurality of sound inlet passages 114 of the protective case body 11 are all directed toward the front side of the protective case 10, forming a sound inlet passage 114A having a multi-stage passage as shown in fig. 3, for example.

Illustratively, the sound inlet holes of the plurality of sound inlet passages 114 of the protective case body 11 are all directed toward the rear side of the protective case 10, forming sound inlet passages 114B as shown in fig. 4, for example.

Illustratively, referring to fig. 6, the sound inlet hole of one or more sound inlet passages 114 of the plurality of sound inlet passages 114 may be directed toward the first side or the second side of the protective case 10. For the sake of convenience of distinction, the sound inlet passage 114 with the sound inlet hole facing the first side is denoted as 114C, and the sound inlet passage 114 with the sound inlet hole facing the second side is denoted as 114D.

For example, referring to fig. 7, the sound inlet hole of one or more sound inlet passages 114 of the plurality of sound inlet passages 114 may be directed toward the third side or the fourth side of the protective case 10. For the sake of convenience of distinction, the sound inlet passage 114 with the sound inlet hole facing the third side is denoted as 114E, and the sound inlet passage 114 with the sound inlet hole facing the fourth side is denoted as 114F.

Since the plurality of sound inlet passages 114 are provided in the protective case body 11, external impurities such as water or dust inevitably enter the protective case 10, and damage is caused to devices inside the protective case 10. Therefore, in order to effectively prevent external foreign substances from entering the inside of the protective case 12, for example, foreign substances such as dust, debris, liquid, etc. may be placed to enter the inside of the protective case 12. In some embodiments, with continued reference to fig. 3 and 4, a sealing member 15 is further disposed in the protective casing 10, the sealing member 15 is disposed between the sound inlet channel 114 and the corresponding sound recording device 12, and an upper surface of the sealing member 15 is exemplarily in sealing fit with a lower surface of the sound recording device 12, so that the sealing member 15 can effectively prevent impurities from entering the interior of the protective casing 10 from the sound inlet channel 114, and protect the devices inside the protective casing 10.

Illustratively, the seal 15 may comprise a foam and a protective mesh, or the seal 15 may comprise a foam or a protective mesh.

In the above, with reference to fig. 1 to 7, the protective casing of the embodiment of the present application is described from an acoustic structure, and in the following, with reference to fig. 8 to 12, the protective casing of the embodiment of the present application is described in detail from the aspects of signal transmission and signal processing.

In some embodiments, referring to fig. 8, the protective case 10 includes a processing unit 17 for connecting with devices (e.g., the sound recording device 144) inside the protective case 10, processing multiple sound signals collected by the sound recording devices 12, and sending the processed sound signals to the mobile device 20.

For convenience of description, the embodiment of the present application is described by taking the protective casing 10 including N sound recording devices 12 and N corresponding sound inlet channels 144 as an example. It should be understood that one sound recording device 12 and the corresponding sound input channel 114 collect one sound signal.

Referring to fig. 8, N sound recording devices 12 and corresponding N sound inlet channels 144 collectively collect N sound signals, which are transmitted to the processing unit 17.

Referring to fig. 8, the processing unit 17 is configured to perform correlation processing on the received N channels of sound signals, and output a processed sound signal, where the processed sound signal is transmitted to the first interface 161.

In some embodiments, if the sound signal output by the sound recording device 12 is an analog signal, the processing unit 17 may be configured to perform analog-to-digital conversion (a/D), i.e., convert the analog signal into a digital signal.

In other embodiments, the processing unit 17 is further configured to perform coding format conversion on the digital signal, and convert the digital signal into a Pulse Code Modulation (PCM) format code stream, so as to obtain code streams of the N sound signals. Illustratively, the code stream may have a sampling rate of 48kHz and a bit width of 16 bits. The sampling rate and bit width of the code stream can also be referred to as the sampling rate and bit width of the sound signal, and the two descriptions can be replaced.

Referring to fig. 9, in other embodiments, the processing unit 17 is further configured to perform a combining process on the N sound signals to obtain a processed sound signal, where the processed sound signal includes M groups of sound signals, and M is an integer smaller than N. Thus, the sound signal can be transmitted with high code rate, and the transmission efficiency is improved.

Each of the M groups of sound signals includes multiple sound signals, and the number of the sound signals included in any two groups of sound signals may be the same or different, and is not limited herein. For example, the first group of sound signals includes 5 channels of sound signals, and the second group of sound signals also includes 5 channels of sound signals, where N is 10 and M is 2; for another example, the first group of sound signals includes 4-channel sound signals, and the second group of sound signals includes 6-channel sound signals.

In some embodiments, the sampling rate of each of the M groups of sound signals is greater than the sampling rate of each of the N sound signals. Illustratively, each set of sound signals includes Q-way sound signals, and the sampling rate of each set of sound signals is greater than or equal to the sum of the sampling rates of the Q-way sound signals. For example, each set of sound signals includes 4 sound signals, the sampling rate of each sound signal is 48kHz, and the sampling rate of each set of sound signals is greater than or equal to 192 kHz.

In other modes, the bit width of each sound signal in the M sound signals is larger than the bit width of each sound signal in the N sound signals. Illustratively, the code streams of the sound signals in each group are spliced together and filled into frames with high code rate, the bit width of each frame is the bit width of each group of sound signals, and if the code streams of the sound signals are not enough to fill the complete frames, a "0" or a "1" is filled in the vacant position.

In the process of combining the N paths of sound signals, the two manners may be used in combination, or may be used separately, and the embodiment of the present application is not limited at all.

The processed audio signal will be described with reference to fig. 9, assuming that N is 10 and M is 2.

Illustratively, referring to fig. 9, the rate of utilization of the code stream of each sound signal in the 10 sound signals is 48kHz, and the rate of utilization of the code stream of each sound signal in the combined 2 groups of sound signals is greater than 48kHz, for example, 192kHz may be used. Of course, the sampling rate of the code stream of each group of combined sound signals may also be 96kHz, 144kHz, 288kHz, and the like, and this embodiment of the present application is not limited at all. Assuming that the bit width of each group of sound signals (or one frame) is 24 bits, the bit width of each path of sound signals is 16 bits, taking the second group of sound signals after combination as an example, the code streams of 5 paths of sound signals are spliced together and filled into the frame with the bit width of 24 bits, and for the fourth frame which is not filled, a "0" is filled.

Referring to fig. 8 and 9, the protective case 10 includes a first interface 161, which is operable to connect with the processing unit 17 and also to connect with the third interface 201 of the mobile device 20 in a wired or wireless manner, so as to implement a wired or wireless connection between the protective case 10 and the mobile device 20, so as to transmit signals between the protective case 10 and the mobile device 20. The signal may include a sound signal or may include a power signal.

The sound signal and the power signal may be transmitted between the protective cover 10 and the mobile device 20 when the first interface 161 is used for wired connection with the third interface 201, and the sound signal may be transmitted between the protective cover 10 and the mobile device 20 when the first interface 161 is used for wireless connection with the third interface 201.

In some embodiments, referring to fig. 8 and 9, the protective case 10 may transmit the processed sound signal to the third interface 201 of the mobile device 20 through the first interface 161 in order for the mobile device 20 to process the sound signal.

The first interface 161 sends the received processed sound signal to the third interface 201 of the mobile device 20, so that the mobile device 20 performs relevant algorithm processing on the sound signal to achieve good recording performance. The processing of the sound signal by the mobile device 20 will be described in detail later.

In other embodiments, the mobile device 20 may also transmit a power signal to the protective case 10 through the third interface 201 and the first interface 161 to power the protective case 10.

It should be understood that the processing of the multiple sound signals by the processing unit 17 is only illustrative and should not limit the embodiments of the present application. For example, the processing unit 17 may not need to perform a combination process on the N audio signals, and may send the N audio signals to the third interface 201 of the mobile device 20 through the first interface 161.

Hereinafter, the embodiments of the present application will be described in detail with reference to fig. 10 to 12 from the perspective of wired connection and wireless connection between the protective case 10 and the mobile device 20, respectively.

In the wired connection between the protective shell 10 and the mobile device 20, most current mobile devices support a Universal Serial Bus (USB) protocol, and in order to be better suitable for the USB protocol of the mobile device, in some embodiments, each interface of the protective shell 10 also supports the USB protocol, and the wired connection is described below by taking the USB interface as an example.

In this embodiment, referring to fig. 10 and 11, the protective case 10 includes a first USB interface 1611 as an example of the first interface 161, and the mobile device 20 includes a third USB interface 2011 as an example of the third interface 201. In some embodiments, with continued reference to fig. 11, the first USB interface protrudes out of the protective case body 11 for insertion into the third USB interface of the mobile device 20.

In the embodiment in which the mobile device 20 supports the USB protocol, most of the interior of the mobile device 20 transmits sound signals through two channels, which may be referred to as a left channel and a right channel, and therefore, referring to fig. 11, the processing unit 17 combines the N channels of sound signals from the sound recording device 144 into two sets of sound signals, one set of sound signals is referred to as a left channel sound signal, the other set of sound signals is referred to as a right channel sound signal, the left channel sound signal is transmitted to the left channel of the mobile device 20 through the first USB interface 1621 and the third USB interface 2011, and the right channel sound signal is transmitted to the right channel of the mobile device 20 through the first USB interface 1621 and the third USB interface 2011. For the related description of the left channel sound signal and the right channel sound signal, reference may be made to the above-mentioned detailed description of the combined first group of sound signals and second group of sound signals, which is not repeated herein.

In an embodiment where the wired connection between the protective shell 10 and the mobile device 20 is implemented through a USB interface, with continued reference to fig. 11, the mobile device 20 may also transmit a power signal to the protective shell 10 through the third USB interface 2011 and the first USB interface 1611 to power the protective shell 10, as shown by the bold arrowed line pointing from the mobile device 20 to the protective shell 10 in fig. 11.

In terms of charging, with continued reference to fig. 11, in some embodiments, the protective case 10 further includes a second USB interface 1621 for connection with various devices of the protective case 10, as well as for connection with an external charging device from which the protective case 10 receives charging input to power the devices within the protective case 10, e.g., to power the processing unit 17 and the sound recording device 144.

In other embodiments, the first USB interface 1611, the second USB interface 1621, and the third USB interface 2011 may be used in combination to simultaneously power the protective case 10 and the mobile device 20. Specifically, referring to the bold arrowed lines pointing to the first USB interface 1611 and the third USB interface 2011 from the charging input in fig. 11, the second USB interface 1621 is connected to the charging device, the first USB interface 1611 is connected to the third USB interface 2011, and when the charging device transmits a power signal to the protective case 10 through the second USB interface 1621 to supply power, the power signal may be transmitted to the third USB interface 2011 of the mobile device 20 through the second USB interface 1621 and the first USB interface 1611 in common to supply power to the mobile device 20.

In the embodiment where the protective cover 10 includes the second USB interface 1621, the second USB interface 1621 is also used for connecting with an external device to transmit data between the protective cover 10 and the external device. In an embodiment where the first USB interface 1611, the second USB interface 1621, and the third USB interface 2011 are used in combination, data may be transmitted between the mobile device 20 and the external device through the second USB interface 1621, the first USB interface 1611, and the third USB interface 2011 while data is transmitted between the protective case 10 and the external device through the second USB interface 1621. Illustratively, the external device may be a device such as a usb disk, a hard disk, or a keyboard.

The second USB interface that sets up on the protective housing of this application embodiment not only can be for the protective housing transmission electric energy, also can transmit data between protective housing and external device, and, more importantly, combines to use between second USB interface, first USB interface and the third USB interface of mobile device, also can provide the electric energy for the mobile device, simultaneously, can transmit data between external device and mobile device. Therefore, a mode of transmitting electric energy and data is provided for the protective shell, and the electric energy can be more conveniently provided for the mobile equipment and the data can be transmitted between the external equipment and the mobile equipment; in addition, the setting of second USB interface can avoid additionally setting up the trompil that is used for dodging the third USB interface of mobile device on the protective housing, and the appearance is pleasing to the eye relatively, and dustproof and waterproof effect also can be improved to a small amount of trompils.

In an embodiment where the protective case 10 includes the second USB interface 1621, the protective case 10 may further include a USB hub, where the USB hub is connected to the second USB interface 1621, and is configured to extend the third USB interface 2011 of the mobile device 20 to an interface that can simultaneously support the first USB interface 1611 and the second USB interface 1621, or to extend the third USB interface 2011 to an interface that can simultaneously connect the protective case 10 to an external charging device or an external device.

In the wireless connection between the protective case 10 and the mobile device 20, the first interface 161 of the protective case 10 and the third interface 201 of the mobile device 20 may be wireless communication modules for transmitting data between the protective case 10 and the mobile device 20.

Referring to fig. 12, the protective case 10 includes a first wireless communication module 1612 as an example of the first interface 161, and the mobile device 20 includes a third wireless communication module 2012 as an example of the third interface 201. The processing unit 17 sends the processed sound signal to the third wireless communication module 2012 through the first wireless communication module 1612, so that the mobile device 20 can process the received sound signal to achieve good recording performance.

In addition, with reference to fig. 12, after the processing unit 17 processes the N channels of sound signals, two groups of sound signals, namely, a left channel sound signal and a right channel sound signal, may also be obtained, and the left channel sound signal and the right channel sound signal are respectively transmitted to the left channel and the right channel of the mobile device 20 through the first USB interface 1621 and the third USB interface 2011. For the related description of the left channel sound signal and the right channel sound signal, reference may be made to the above-mentioned detailed description of the combined first group of sound signals and second group of sound signals, which is not repeated herein.

The wireless communication modules (the first wireless communication module 1612 and the third wireless communication module 1622) according to the embodiment of the application can provide wireless communication technologies including a Wireless Local Area Network (WLAN) (e.g., a wireless fidelity (Wi-Fi) network), bluetooth (bluetooth, BT), a Global Navigation Satellite System (GNSS), Frequency Modulation (FM), a Near Field Communication (NFC), an infrared technology (infrared, IR), and the like, which are applied to an electronic device.

It should be understood that the first wireless communication module 1621 and the third wireless communication module 2011 support the same type of wireless communication technology.

In the wireless transmission process, in order to enable the transmission of the sound signal obtained after the combination processing to be suitable for the wireless transmission, in some embodiments, the processing unit 17 is further configured to perform compression coding processing on the processed sound signal, so as to reduce a code rate of a code stream of the sound signal and reduce a requirement on a transmission bandwidth. For example, the sound signal subjected to the compression encoding process may be a code stream in an Advanced Audio Coding (AAC) format.

In embodiments where the connection between the protective case 10 and the mobile device 20 is wireless, with continued reference to fig. 12, in some embodiments the protective case 20 further includes a wireless power module 1622 for connection to various devices within the protective case 10, as well as for connection to an external wireless power module, the wireless power module 1622 receiving a charging input to power the protective case 10, as shown by the bold arrowed lines in fig. 12. Illustratively, the wireless power supply module 1622 may be a wireless charging coil.

In some embodiments, the external wireless power supply module may be a wireless power supply module in a wireless charger, that is, the wireless power supply module 1622 may supply power to the protective case 10 through the wireless charger. In other embodiments, in the structure where the mobile device 20 has a wireless power supply module, the external wireless power supply module may also be the wireless power supply module of the mobile device, that is, the wireless power supply module 1622 may supply power to the protective case 10 through the mobile device 20.

It should be understood that the above-mentioned embodiment of supplying power to the protective casing 10 through the wireless power supply module 1622 is only an illustrative example, and for example, an interface for wired connection with an external charging device may also be provided on the protective casing 10, for example, a second USB interface 1621 shown in fig. 11 may be provided on the protective casing 10.

Hereinafter, the processing of the audio signal by the mobile device 20 will be described with reference to fig. 13 to 14.

Referring to fig. 13, the mobile device 20 includes a third interface 201 and a processing unit 210. The third interface 201 is configured to be connected to the first interface 161 of the protective shell 10 in a wireless or wired manner, so as to implement a wireless or wired connection between the mobile device 20 and the protective shell 10. The processing unit 210 is used to process the sound signal.

When the third interface 201 is used for wired connection with the first interface 161, the third interface 201 may be, for example, a third USB interface 2011 shown in fig. 10 and 11. When the third interface 201 is used for wireless connection with the first interface 161, the third interface 201 may be, for example, a third wireless communication module 2012 shown in fig. 12.

When the third interface 201 is connected to the first interface 161, the sound signal (the processed sound signal shown in fig. 8 to 12) from the protective case 10 is transmitted to the processing unit 210 through the third interface 201.

In the embodiment that the protection shell 10 performs merging processing on the sound signals, correspondingly, for the mobile device 20, referring to fig. 13, the processing unit 210 further includes a demultiplexing module 211, configured to demultiplex and process the sound signals from the protection shell 10, so as to obtain multiple paths of sound signals collected by the multiple sound recording devices 144 of the protection shell 10. For example, referring to fig. 8 to 12, the protective shell 10 collects N sound signals through the N sound recording devices 144, combines the sound signals to form two sets of sound signals, and the two sets of sound signals are transmitted to the mobile device 20, and the combining and demultiplexing module 211 of the processing unit 210 is configured to combine the two sets of sound signals into the N sound signals.

In an embodiment where the third interface 201 is the third wireless power-on module 2011, the processing unit 210 may further include a decompressing module, before the decomplexing and combining module 211 performs decomplexing and combining on the sound signal from the protective shell 10, the decompressing module is further configured to decompress the sound signal to obtain a decompressed sound signal, and the decomplexing and combining module 211 performs decomplexing and combining on the decompressed sound signal to obtain multiple paths of sound signals collected by the multiple sound recording devices 144 of the protective shell 10.

With continued reference to fig. 13, the processing unit 210 further includes a recording algorithm module 213, configured to perform a recording algorithm process on the N channels of decoded and combined sound signals to output processed sound signals, so as to obtain sound signals with better quality. Illustratively, the recording algorithm module 213 may be used for noise reduction, distortion reduction, and human voice enhancement processing of the sound signal. The sound signal processed by the recording algorithm module 213 has the advantages of narrower main lobe beam, less noise reduction performance, increased spatial resolution, and the like.

According to the mobile equipment provided by the embodiment of the application, under the condition that the protective shell compresses N paths of sound signals, the mobile equipment decompresses the sound signals from the protective shell, and performs recording algorithm processing on the obtained N paths of sound signals to obtain high-quality sound signals.

With continued reference to fig. 13, the mobile device 20 further includes a plurality of sound recording devices 220, in order to achieve better sound recording performance, in addition to the sound recording device 144 of the protective shell 10 being used to collect the sound signal to achieve the sound recording function, the sound recording device 210 of the mobile device 20 may also be used to collect the sound signal, and the sound signal collected by the sound recording device 144 and the sound signal collected by the sound recording device 210 are combined to obtain more sound signals, so as to obtain better audio information, so as to obtain better sound recording performance.

Illustratively, with continued reference to fig. 13, assuming that the mobile device 20 includes P sound recording devices 220, then P channels of sound signals are available through the P sound recording devices. The recording algorithm module 213 of the processing unit 210 performs the recording algorithm processing on the N-channel sound signals and the P-channel sound signals obtained by decompression from the protective shell 10 to obtain the sound signals with good quality.

In the embodiment that the sound signal can be collected by the sound recording device 220 of the mobile device 20, because the path through which the sound signal from the mobile device 20 passes is not consistent with the path through which the sound signal from the protective shell 10 passes, the sound signal from the mobile device 20 and the sound signal from the protective shell 10 have different time delay differences, which is not favorable for performing a sound recording algorithm and affects the final processing effect. Thus, with continued reference to fig. 13, the processing unit 210 further comprises a delay alignment module 212 for delay aligning the acoustic signal from the protective case 10 and the acoustic signal from the mobile device 20. The recording algorithm module 213 performs a recording algorithm process on the time-delay aligned sound signal to obtain a sound signal with high quality.

In some embodiments, the correlation detection method may be used to perform delay alignment processing on the signals. Illustratively, different delay compensations can be tried to be adopted, the correlation coefficient of the two signals is calculated, the delay compensation when the correlation coefficient is maximum can be regarded as the time difference t of the two signals, and then the advanced signal is buffered for a time t, namely the advanced signal is delayed for the time t, so that the delay alignment of the two signals is realized.

When the mobile device 20 does not require recording, the case 10 may be in a low power mode to reduce power consumption of the case 10.

The low power consumption mode of the protective case 10 according to the embodiment of the present application may be that a part of the functional modules or circuit elements in the protective case 10 are in a low power consumption module.

In some embodiments, the low power mode of the protective case 10 may be that the sound recording device 144 within the protective case 10 is in a low power mode. Illustratively, the low power mode of the sound recording device 144 may be that the sound recording device 144 is in a power-off state, or that the sound recording device 144 is in a low frequency operation mode. Of course, other modules in the protective casing 10, such as the processing unit 17, may also be in the low power consumption mode, and the embodiment of the present application is not limited in any way. For example, the processing unit 17 may be in a low frequency mode of operation, ceasing power to the recording device 144.

In some embodiments, the mobile device 20 sends a first instruction to the protective shell 10 through the third interface 201 and the first interface 161 to indicate that the protective shell 10 is in the low power consumption mode, and after receiving the first instruction, the processing unit 170 of the protective shell 10 controls the protective shell 10 to switch to the low power consumption mode.

When the mobile device 20 needs to start the sound recording function, the mobile device 20 sends a second instruction to the protective shell 10 through the third interface 201 and the first interface 161 to indicate that the protective shell 10 is in the sound recording mode. After receiving the second instruction, the processing unit 17 of the protective case 10 controls the protective case 10 to switch from the low power consumption mode to the recording mode. The recording mode may be an operation mode of the recording device 114 and other related devices (e.g., the processing unit 170) to collect and process sound signals.

If the low power mode is the recording device 144 of the protective case 10 being in the power-off state, the power supply state of the recording device 144 needs to be restored first before the protective case 10 starts the recording mode.

For example, if the third interface 201 is the third USB interface 2011 and the first interface 161 is the first USB interface 1611, the mobile device 20 may supply power to the protective case 10 through the third USB interface 2011 and the first USB interface 1611, so that the sound recording device 144 is in a power-on state.

For example, if the protective case 10 includes the second USB interface, the protective case 10 may be powered by the charging device to enable the sound recording device 144 to be in the power-on state.

For example, if the third interface 201 and the first interface 161 are wireless communication modules, the protective case 10 may be powered by the wireless power supply module 1622, so that the sound recording device 144 is in a power-on state.

Fig. 14 is a schematic flow chart of a method of signal processing provided by an embodiment of the present application. The method of signal processing is performed by a mobile device 20, the method comprising the following steps.

S410, M groups of sound signals from a protective shell of the mobile equipment are received, wherein M is an integer larger than 1.

And S420, performing decoding and merging processing on the M groups of sound signals to obtain N paths of sound signals, wherein N is an integer greater than M.

And S430, performing recording algorithm processing on the N paths of sound signals.

For specific description of the mobile device for performing the de-combination processing on the M groups of sound signals and the processing on the N channels of sound signals, reference may be made to the description of the mobile device for performing the signal processing shown in fig. 13, and details are not repeated.

Optionally, the mobile device further includes P sound recording devices, and the method further includes:

For a detailed description of the process, reference may be made to the description of the process of processing the sound signal from the mobile device and the protective case by the mobile device shown in fig. 13, and details are not repeated.

Optionally, the method further comprises:

Optionally, the low power consumption mode comprises: the recording device in the protective shell is in a power-off state, or the recording device in the protective shell is in a low-frequency working mode.

Fig. 15 is a schematic block diagram of a mobile device provided in another embodiment of the present application. Referring to fig. 15, the mobile device 30 may include a processor 310, an external memory interface 320, an internal memory 321, a Universal Serial Bus (USB) interface 330, a charging management module 340, a power management module 341, a battery 342, an antenna 1, an antenna 2, a mobile communication module 350, a wireless communication module 360, an audio module 370, a speaker 370A, a receiver 370B, a microphone 370C, an earphone interface 370D, a sensor module 380, keys 390, a motor 391, an indicator 392, a camera 393, a display 394, and a Subscriber Identification Module (SIM) card interface 395, and the like. The sensor module 380 may include a pressure sensor 380A, a gyroscope sensor 380B, an air pressure sensor 380C, a magnetic sensor 380D, an acceleration sensor 380E, a distance sensor 380F, a proximity light sensor 380G, a fingerprint sensor 380H, a temperature sensor 380J, a touch sensor 380K, an ambient light sensor 380L, a bone conduction sensor 380M, and the like.

It is to be understood that the illustrated structure of the embodiment of the present application does not constitute a specific limitation to the mobile device 30. In other embodiments of the present application, the mobile device 30 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 310 may correspond to the processing unit 210 of the mobile device 20 described above, and is configured to execute the steps executed by the corresponding processing unit 210, for example, perform the de-combination processing on the M groups of sound signals from the protective shell to obtain N sound signals, perform the recording algorithm processing on the N sound signals, perform the delay alignment processing and the recording algorithm processing on the P sound signals from the mobile device and the N sound signals from the protective shell, and send the first instruction or the second instruction to the protective shell.

Processor 310 may include one or more processing units, such as: the processor 310 may include an Application Processor (AP), a modem processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a memory, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), etc. The different processing units may be separate devices or may be integrated into one or more processors.

The controller may be, among other things, a neural center and a command center of the mobile device 30. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in the processor 310 for storing instructions and data. In some embodiments, the memory in the processor 310 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 310. If the processor 310 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 310, thereby increasing the efficiency of the system.

In some embodiments, processor 310 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.

The I2C interface is a bi-directional synchronous serial bus that includes a serial data line (SDA) and a Serial Clock Line (SCL). In some embodiments, the processor 310 may include multiple sets of I2C buses. The processor 310 may be coupled to the touch sensor 380K, the charger, the flash, the camera 393, etc., via different I2C bus interfaces. For example: the processor 310 may be coupled to the touch sensor 380K via an I2C interface, such that the processor 310 and the touch sensor 380K communicate via an I2C bus interface to implement touch functionality of the mobile device 30.

The I2S interface may be used for audio communication. In some embodiments, the processor 310 may include multiple sets of I2S buses. The processor 310 may be coupled to the audio module 370 via an I2S bus to enable communication between the processor 310 and the audio module 370. In some embodiments, the audio module 370 may communicate audio signals to the wireless communication module 360 via an I2S interface, enabling answering of calls via a bluetooth headset.

The PCM interface may also be used for audio communication, sampling, quantizing and encoding analog signals. In some embodiments, the audio module 370 and the wireless communication module 360 may be coupled by a PCM bus interface. In some embodiments, the audio module 370 may also transmit audio signals to the wireless communication module 360 through the PCM interface, so as to implement a function of answering a call through a bluetooth headset. Both the I2S interface and the PCM interface may be used for audio communication.

The UART interface is a universal serial data bus used for asynchronous communications. The bus may be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, a UART interface is generally used to connect the processor 310 with the wireless communication module 360. For example: the processor 310 communicates with the bluetooth module in the wireless communication module 360 through the UART interface to implement the bluetooth function. In some embodiments, the audio module 370 may transmit the audio signal to the wireless communication module 360 through a UART interface, so as to realize the function of playing music through a bluetooth headset.

The MIPI interface may be used to connect processor 310 with peripheral devices such as display 394, camera 393, and the like. The MIPI interface includes a Camera Serial Interface (CSI), a Display Serial Interface (DSI), and the like. In some embodiments, processor 310 and camera 393 communicate over a CSI interface to implement the camera functions of mobile device 30. The processor 310 and the display screen 394 communicate via a DSI interface to implement display functions of the mobile device 30.

The GPIO interface may be configured by software. The GPIO interface may be configured as a control signal and may also be configured as a data signal. In some embodiments, a GPIO interface may be used to connect the processor 310 with the camera 393, the display 394, the wireless communication module 360, the audio module 370, the sensor module 380, and the like. The GPIO interface may also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, and the like.

The USB interface 330 is an interface conforming to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. The USB interface 330 may be used to connect a charger to charge the mobile device 30, and may also be used to transfer data between the mobile device 30 and a peripheral device. And the earphone can also be used for connecting an earphone and playing audio through the earphone. The interface may also be used to connect other electronic devices, such as AR devices and the like.

In this embodiment, the USB interface 330 may correspond to the third USB interface 2011 of the mobile device 20 described above.

It should be understood that the interfacing relationship between the modules illustrated in the embodiment of the present application is only an exemplary illustration, and does not constitute a structural limitation for the mobile device 30. In other embodiments of the present application, the mobile device 30 may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.

The charging management module 340 is configured to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 340 may receive charging input from a wired charger via the USB interface 330. In some wireless charging embodiments, the charging management module 340 may receive a wireless charging input through a wireless charging coil of the mobile device 30. The charging management module 340 may also supply power to the electronic device through the power management module 341 while charging the battery 342.

The power management module 341 is configured to connect the battery 342, the charging management module 340 and the processor 310. The power management module 341 receives input from the battery 342 and/or the charge management module 340 and provides power to the processor 310, the internal memory 321, the external memory, the display 394, the camera 393, and the wireless communication module 360. The power management module 341 may also be configured to monitor parameters such as battery capacity, battery cycle count, and battery state of health (leakage, impedance). In other embodiments, the power management module 341 may also be disposed in the processor 310. In other embodiments, the power management module 341 and the charging management module 340 may be disposed in the same device.

The wireless communication function of the mobile device 30 can be implemented by the antenna 1, the antenna 2, the mobile communication module 350, the wireless communication module 360, the modem processor, the baseband processor, and the like.

The

antennas

1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the mobile device 30 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 350 may provide a solution including 2G/3G/4G/5G wireless communication applied on the mobile device 30. The mobile communication module 350 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 350 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the filtered electromagnetic wave to the modem processor for demodulation. The mobile communication module 350 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 350 may be disposed in the processor 310. In some embodiments, at least some of the functional modules of the mobile communication module 350 may be disposed in the same device as at least some of the modules of the processor 310.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then passes the demodulated low frequency baseband signal to a baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs sound signals through an audio device (not limited to the speaker 370A, the receiver 370B, etc.) or displays images or video through the display 394. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be separate from the processor 310, and may be disposed in the same device as the mobile communication module 350 or other functional modules.

The wireless communication module 360 may provide solutions for wireless communication applied on the mobile device 30, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), bluetooth (bluetooth, BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like. The wireless communication module 360 may be one or more devices integrating at least one communication processing module. The wireless communication module 360 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 310. The wireless communication module 360 may also receive a signal to be transmitted from the processor 310, frequency-modulate and amplify the signal, and convert the signal into electromagnetic waves via the antenna 2 to radiate the electromagnetic waves.

In the embodiment of the present application, the wireless communication module 360 may correspond to the third wireless communication block 2012 of the mobile device 20 described above.

In some embodiments, antenna 1 of mobile device 30 is coupled to mobile communication module 350 and antenna 2 is coupled to wireless communication module 360 so that mobile device 30 can communicate with networks and other devices via wireless communication techniques. The wireless communication technology may include global system for mobile communications (GSM), General Packet Radio Service (GPRS), code division multiple access (code division multiple access, CDMA), Wideband Code Division Multiple Access (WCDMA), time-division code division multiple access (time-division code division multiple access, TD-SCDMA), Long Term Evolution (LTE), LTE, BT, GNSS, WLAN, NFC, FM, and/or IR technologies, etc. The GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and/or a Satellite Based Augmentation System (SBAS).

The mobile device 30 implements display functions via the GPU, display screen 394, and application processor, among other things. The GPU is an image processing microprocessor coupled to a display 394 and an application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 310 may include one or more GPUs that execute program instructions to generate or alter display information.

The display screen 394 is used to display images, video, and the like. The display screen 394 includes a display panel. The display panel may adopt a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), and the like. In some embodiments, the mobile device 30 may include 1 or N display screens 394, N being a positive integer greater than 1.

Mobile device 30 may implement the camera functions via the ISP, camera 393, video codec, GPU, display 394, application processor, etc.

The ISP is used to process the data fed back by the camera 393. For example, when a photo is taken, the shutter is opened, light is transmitted to the camera photosensitive element through the lens, the optical signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and converting into an image visible to naked eyes. The ISP can also carry out algorithm optimization on the noise, brightness and skin color of the image. The ISP can also optimize parameters such as exposure, color temperature and the like of a shooting scene. In some embodiments, the ISP may be located in camera 393.

Camera 393 is used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The photosensitive element may be a Charge Coupled Device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The light sensing element converts the optical signal into an electrical signal, which is then passed to the ISP where it is converted into a digital image signal. And the ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into image signal in standard RGB, YUV and other formats. In some embodiments, mobile device 30 may include 1 or N cameras 393, N being a positive integer greater than 1.

The digital signal processor is used for processing digital signals, and can process digital image signals and other digital signals. For example, when the mobile device 30 is in frequency bin selection, the digital signal processor is used to perform a fourier transform or the like on the frequency bin energy.

Video codecs are used to compress or decompress digital video. Mobile device 30 may support one or more video codecs. In this way, the mobile device 30 may play or record video in a variety of encoding formats, such as: moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, and the like.

The NPU is a neural-network (NN) computing processor that processes input information quickly by using a biological neural network structure, for example, by using a transfer mode between neurons of a human brain, and can also learn by itself continuously. Applications such as intelligent awareness of the mobile device 30 may be implemented by the NPU, for example: image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface 320 may be used to connect an external memory card, such as a Micro SD card, to extend the memory capability of the mobile device 30. The external memory card communicates with the processor 310 through the external memory interface 320 to implement a data storage function. For example, files such as music, video, etc. are saved in an external memory card.

The internal memory 321 may be used to store computer-executable program code, which includes instructions. The processor 310 executes various functional applications of the mobile device 30 and data processing by executing instructions stored in the internal memory 321. The internal memory 321 may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. The stored data area may store data created during use of the mobile device 30 (e.g., audio data, phone book, etc.), and the like. In addition, the internal memory 321 may include a high-speed random access memory, and may further include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), and the like.

The mobile device 30 may implement audio functions via the audio module 370, speaker 370A, microphone 370B, earphone interface 370C, and application processor, among other things. Such as music playing, recording, etc.

The audio module 370 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 370 may also be used to encode and decode audio signals. In some embodiments, the audio module 370 may be disposed in the processor 310, or some functional modules of the audio module 370 may be disposed in the processor 310.

The speaker 370A, also called a "horn", is used to convert the audio electrical signal into an acoustic signal. The mobile device 30 may listen to music through the speaker 370A or to a hands-free conversation.

The receiver 370B, also called "earpiece", is used to convert the electrical audio signal into an acoustic signal. When the mobile device 30 answers a call or voice message, the voice can be answered by placing the receiver 370B close to the ear of the person.

Microphone 370C, also known as a "microphone," is used to convert sound signals into electrical signals. When making a call or transmitting voice information, the user can input a voice signal into the microphone 370C by speaking the user's mouth near the microphone 370C. The mobile device 30 may be provided with at least one microphone 370C. In other embodiments, the mobile device 30 may be provided with two microphones 370C to implement noise reduction functions in addition to collecting sound signals. In other embodiments, three, four or more microphones 370C may be provided on the mobile device 30 to collect sound signals, reduce noise, identify sound sources, perform directional recording, and so on.

In the embodiment of the present application, the microphone 370C may correspond to the sound recording device 220 in the mobile device 20 described above.

The headphone interface 370D is used to connect wired headphones. The headset interface 370D may be the USB interface 330, or may be a 3.5mm open mobile electronic device platform (OMTP) standard interface, a cellular telecommunications industry association (cellular telecommunications industry association of the USA, CTIA) standard interface.

The pressure sensor 380A is used for sensing a pressure signal, and converting the pressure signal into an electrical signal. In some embodiments, the pressure sensor 380A may be disposed on the display screen 394. The pressure sensor 380A can be of a wide variety, such as a resistive pressure sensor, an inductive pressure sensor, a capacitive pressure sensor, or the like. The capacitive pressure sensor may be a sensor comprising at least two parallel plates having an electrically conductive material. When a force acts on the pressure sensor 380A, the capacitance between the electrodes changes. The mobile device 30 determines the strength of the pressure from the change in capacitance. When a touch operation is applied to the display screen 394, the mobile device 30 detects the intensity of the touch operation according to the pressure sensor 380A. The mobile device 30 can also calculate the position of the touch from the detection signal of the pressure sensor 380A. In some embodiments, the touch operations that are applied to the same touch position but different touch operation intensities may correspond to different operation instructions. For example: and when the touch operation with the touch operation intensity smaller than the first pressure threshold value acts on the short message application icon, executing an instruction for viewing the short message. And when the touch operation with the touch operation intensity larger than or equal to the first pressure threshold value acts on the short message application icon, executing an instruction of newly building the short message.

The gyro sensor 380B may be used to determine the motion pose of the mobile device 30. In some embodiments, the angular velocity of the mobile device 30 about three axes (i.e., x, y, and z axes) may be determined by the gyroscope sensor 380B. The gyro sensor 380B may be used for photographing anti-shake. For example, when the shutter is pressed, the gyro sensor 380B detects the shake angle of the mobile device 30, calculates the distance to be compensated for by the lens module according to the shake angle, and allows the lens to counteract the shake of the mobile device 30 through a reverse motion, thereby achieving anti-shake. The gyro sensor 380B may also be used for navigation, somatosensory gaming scenes.

The air pressure sensor 380C is used to measure air pressure. In some embodiments, mobile device 30 calculates altitude, aiding in positioning and navigation from barometric pressure values measured by barometric pressure sensor 380C.

The magnetic sensor 380D includes a hall sensor. The mobile device 30 may detect the opening and closing of the flip holster using the magnetic sensor 380D. In some embodiments, when the mobile device 30 is a flip phone, the mobile device 30 may detect the opening and closing of the flip according to the magnetic sensor 380D. And then according to the opening and closing state of the leather sheath or the opening and closing state of the flip cover, the automatic unlocking of the flip cover is set.

The acceleration sensor 380E can detect the magnitude of acceleration of the mobile device 30 in various directions (typically three axes). The magnitude and direction of gravity can be detected when the mobile device 30 is stationary. The method can also be used for recognizing the posture of the electronic equipment, and is applied to horizontal and vertical screen switching, pedometers and other applications.

A distance sensor 380F for measuring distance. The mobile device 30 may measure distance by infrared or laser. In some embodiments, taking a picture of a scene, the mobile device 30 may utilize the range sensor 380F to range for fast focus.

The proximity light sensor 380G may include, for example, a Light Emitting Diode (LED) and a light detector, such as a photodiode. The light emitting diode may be an infrared light emitting diode. The mobile device 30 emits infrared light outward through the light emitting diode. The mobile device 30 uses a photodiode to detect infrared reflected light from nearby objects. When sufficient reflected light is detected, it can be determined that there is an object near the mobile device 30. When insufficient reflected light is detected, the mobile device 30 may determine that there are no objects near the mobile device 30. The mobile device 30 can utilize the proximity light sensor 380G to detect that the user holds the mobile device 30 close to the ear for talking, so as to automatically turn off the screen for power saving. The proximity light sensor 380G may also be used in a holster mode, a pocket mode automatically unlocks and locks the screen.

The ambient light sensor 380L is used to sense the ambient light level. The mobile device 30 may adaptively adjust the display screen 394 brightness based on the perceived ambient light level. The ambient light sensor 380L may also be used to automatically adjust the white balance when taking a picture. The ambient light sensor 380L may also cooperate with the proximity light sensor 380G to detect whether the mobile device 30 is in a pocket to prevent inadvertent contact.

The fingerprint sensor 380H is used to capture a fingerprint. The mobile device 30 may utilize the collected fingerprint characteristics to implement fingerprint unlocking, access an application lock, fingerprint photographing, fingerprint incoming call answering, and the like.

The temperature sensor 380J is used to detect temperature. In some embodiments, the mobile device 30 implements a temperature processing strategy using the temperature detected by the temperature sensor 380J. For example, when the temperature reported by the temperature sensor 380J exceeds a threshold, the mobile device 30 performs a reduction in performance of a processor located near the temperature sensor 380J in order to reduce power consumption and implement thermal protection. In other embodiments, the mobile device 30 heats the battery 342 when the temperature is below another threshold to avoid a low temperature causing the mobile device 30 to shut down abnormally. In other embodiments, when the temperature is below yet another threshold, the mobile device 30 performs a boost on the output voltage of the battery 342 to avoid abnormal shutdown due to low temperature.

The touch sensor 380K is also referred to as a "touch panel". The touch sensor 380K may be disposed on the display screen 394, and the touch sensor 380K and the display screen 394 form a touch screen, which is also referred to as a "touch screen". The touch sensor 380K is used to detect a touch operation applied thereto or thereabout. The touch sensor can communicate the detected touch operation to the application processor to determine the touch event type. Visual output associated with the touch operation may be provided via the display 394. In other embodiments, the touch sensor 380K can be disposed on a surface of the mobile device 30 at a location different from the location of the display 394.

The bone conduction sensor 380M can acquire a vibration signal. In some embodiments, the bone conduction transducer 380M can acquire a vibration signal of the vibrating bone mass of the human voice. The bone conduction sensor 380M may also contact the human body pulse to receive the blood pressure pulsation signal. In some embodiments, the bone conduction sensor 380M may also be disposed in a headset, integrated into a bone conduction headset. The audio module 370 may analyze a voice signal based on the vibration signal of the bone mass vibrated by the sound part acquired by the bone conduction sensor 380M, so as to implement a voice function. The application processor can analyze heart rate information based on the blood pressure beating signal acquired by the bone conduction sensor 380M, so as to realize the heart rate detection function.

Keys 390 include a power-on key, a volume key, etc. The keys 390 may be mechanical keys. Or may be touch keys. The mobile device 30 may receive key inputs, generating key signal inputs related to user settings and function control of the mobile device 30.

The motor 391 may generate a vibration cue. The motor 391 may be used for both incoming call vibration prompting and touch vibration feedback. For example, touch operations applied to different applications (e.g., photographing, audio playing, etc.) may correspond to different vibration feedback effects. The motor 391 may also respond to different vibration feedback effects by performing touch operations on different areas of the display 394. Different application scenes (such as time reminding, receiving information, alarm clock, game and the like) can also correspond to different vibration feedback effects. The touch vibration feedback effect may also support customization.

Indicator 392 may be an indicator light that may be used to indicate a state of charge, a change in charge, or a message, missed call, notification, etc.

The SIM card interface 395 is for connecting a SIM card. The SIM card can be brought into and out of contact with the mobile device 30 by being inserted into and pulled out of the SIM card interface 395. The mobile device 30 may support 1 or N SIM card interfaces, N being a positive integer greater than 1. The SIM card interface 395 may support a Nano SIM card, a Micro SIM card, a SIM card, etc. Multiple cards can be inserted into the same SIM card interface 395 at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 395 may also be compatible with different types of SIM cards. The SIM card interface 395 may also be compatible with an external memory card. The mobile device 30 interacts with the network through the SIM card to implement functions such as telephony and data communication. In some embodiments, the mobile device 30 employs esims, namely: an embedded SIM card. The eSIM card can be embedded in the mobile device 30 and cannot be separated from the mobile device 30.

It should be understood that in the embodiments of the present application, the terms "connected", "fixedly connected", and the like are to be construed broadly unless otherwise explicitly stated or limited. Specific meanings of the above-mentioned various terms in the embodiments of the present application can be understood by those skilled in the art according to specific situations.

For example, the "connection" may be various connection manners such as fixed connection, rotational connection, flexible connection, movable connection, integral molding, electrical connection, and the like; may be directly connected to one another or may be indirectly connected to one another through intervening media, or may be interconnected within two elements or in an interactive relationship between the two elements.

By way of example, with respect to "fixedly attached," it is possible that one element may be directly or indirectly fixedly attached to another element; the fixed connection may include mechanical connection, welding, bonding, and the like, wherein the mechanical connection may include riveting, bolting, screwing, keying, snapping, latching, plugging, and the like, and the bonding may include adhesive bonding, solvent bonding, and the like.

It should also be understood that "parallel" or "perpendicular" as described in the embodiments of the present application may be understood as "approximately parallel" or "approximately perpendicular".

It will be further understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "at least a portion of an element" means a part or all of an element. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, both A and B, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A protective shell is characterized by being fixedly connected with a mobile device and comprising a protective shell body, N sound recording devices and a first interface, wherein the N sound recording devices and the first interface are arranged on the protective shell body,

2. A protective case according to claim 1,

the N sound inlet channels comprise a first part and a second part, sound inlet holes formed in the other end of the sound inlet channels in the first part face the front side of the protective shell, and sound inlet holes formed in the other end of the sound inlet channels in the second part face the rear side of the protective shell.

3. The protective case according to claim 2, wherein the sound intake passage in the first portion includes a first passage, a second passage, and a third passage, both ends of the second passage are respectively communicated with the first passage and the third passage, a sound intake hole formed at one end of the first passage faces a front side of the protective case, and one end of the third passage is communicated with a corresponding sound recording device, wherein,

4. The protective case of claim 3, further comprising a cover plate disposed on the back of the protective case body and on one side of the second channel to cover the second channel to form the closed sound inlet channel.

5. A protective casing according to any one of claims 2 to 4 wherein the sound inlet passage in the second portion is parallel to the thickness direction of the casing body.

6. A protective casing according to any one of claims 1 to 5, further comprising a seal provided between the sound inlet passage and the corresponding sound recording device.

7. A protective case according to claim 6, wherein the first interface is a first USB interface which extends out of the case body for insertion into the mobile device.

8. The protective case of claim 7, further comprising a second USB interface and a USB hub, the second USB interface is configured to connect to a charging device or an external device, and the USB hub is connected to the second USB interface, so that the mobile device and the charging device or the external device can be connected through the second USB interface and the first USB interface.

9. The protective case according to any one of claims 1 to 8, further comprising a processing unit disposed on the protective case body, for combining N sound signals collected by the N sound recording devices into M groups of sound signals, one sound recording device being configured to collect one sound signal, M being an integer smaller than N.

10. The protective case of claim 9, wherein the processing unit is further configured to:

receiving a first instruction from the mobile device;

11. The protective case of claim 10, wherein the processing unit is further configured to:

receiving a second instruction from the mobile device;

12. A protective case according to claim 10 or 11, wherein the low power consumption mode comprises: the recording device is in a power-off state, or the recording device is in a low-frequency working mode.

13. A protective case according to any one of claims 1 to 12, wherein the first interface is a first wireless communications module.

14. The protective case of claim 13, further comprising a wireless power module to power the protective case.

15. A method of signal processing, for use in a mobile device, the method comprising:

16. The method of claim 15, wherein the mobile device comprises P sound recording devices, P being an integer greater than or equal to 1, the method further comprising:

17. The method according to claim 15 or 16, characterized in that the method further comprises:

18. The method of claim 17, further comprising:

19. The method of claim 17 or 18, wherein the low power consumption mode comprises: the recording device in the protective shell is in a power-off state, or the recording device in the protective shell is in a low-frequency working mode.

20. A mobile device, comprising a processing unit to:

21. The mobile device of claim 20, wherein the mobile device comprises P sound recording devices for collecting P sound signals, one sound recording device for collecting one sound signal, P being an integer greater than or equal to 1;

22. The mobile device of claim 20 or 21, wherein the processing unit is further configured to send a first instruction to the protective case to indicate that the protective case is in a low power consumption mode.

23. The mobile device of claim 22, wherein the processing unit is further configured to send a second instruction to the protective case instructing the protective case to switch from the low power consumption mode to a recording mode.

24. The mobile device of claim 22 or 23, wherein the low power consumption mode comprises: the recording device in the protective shell is in a power-off state, or the recording device in the protective shell is in a low-frequency working mode.

25. An electronic device, includes mobile device and protective housing, the protective housing with mobile device fixed connection, the protective housing includes: the mobile equipment comprises a protective shell body, N sound recording devices and a first interface, wherein the N sound recording devices and the first interface are arranged on the protective shell body, the mobile equipment comprises a third interface, the third interface is arranged on the protective shell body,

26. The electronic device according to claim 25, wherein the N sound intake passages include a first portion and a second portion, wherein a sound intake hole formed at the other end of the sound intake passage in the first portion faces a front side of the protective case, and a sound intake hole formed at the other end of the sound intake passage in the second portion faces a rear side of the protective case.

27. The electronic device according to claim 25 or 26, wherein the protective case further comprises a first processing unit disposed on the protective case body, and configured to combine N sound signals collected by the N sound recording devices into M groups of sound signals, one sound recording device being configured to collect one sound signal, M being an integer smaller than N;

28. The electronic device of claim 27, wherein the mobile device further comprises P sound recording devices for collecting P sound signals, one sound recording device for collecting one sound signal, P being an integer greater than or equal to 1;

29. A computer storage medium, comprising: a processor coupled with a memory, the memory to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 15 to 19.