WO2017113604A1

WO2017113604A1 - Method and device for transmitting and receiving audio signals

Info

Publication number: WO2017113604A1
Application number: PCT/CN2016/084683
Authority: WO
Inventors: 陈文杰
Original assignee: 深圳Tcl数字技术有限公司
Priority date: 2015-12-30
Filing date: 2016-06-03
Publication date: 2017-07-06
Also published as: CN105472509B; CN105472509A

Abstract

Disclosed in the present invention is a method for transmitting audio signals. The method comprises: acquiring first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information; performing analog-to-digital conversion of the acquired first channel audio information and second channel audio information so as to obtain first audio information, and performing analog-to-digital conversion on the acquired third channel audio information and fourth channel audio information so as to obtain second audio information; performing coding operation on the first audio information and second audio information so as to obtain information to be transmitted; and transmitting the information to be transmitted. Further disclosed in the present invention are a device for transmitting audio signals, and a method and device for receiving audio signals. According to the present invention, data information of four channels is transmitted by one transmitter, avoiding the mutual interference of transmitted signals that is generated when two wireless transmission modules are used to transmit data information of four channels, reducing the number of the transmitter, reducing the cost.

Description

Audio signal transmitting and receiving method and device

Technical field

The present invention relates to the field of audio signal processing technologies, and in particular, to an audio signal transmitting and receiving method and apparatus.

Background technique

In the home theater system, in order to make the entire system connection more convenient and the living room environment to be neat, the home theater system's surround and bass functions are wirelessly connected.

In the wireless connection scheme of the existing home theater system, each pair of transmitting and transmitting modules can only transmit data of two channels. Therefore, two pairs of transceiver modules are needed to implement functions such as surround and bass in the home theater system. However, the signals transmitted by the two wireless transmitting modules in this manner cause mutual interference, thereby causing errors in the signals received by the receiving module and affecting the audio effects of the home theater system.

Summary of the invention

The invention provides an audio signal transmitting and receiving method and device, which aims to solve the technical problem that the signals emitted by two existing wireless transmitting modules generate mutual interference and affect the audio effect of the home theater system.

To achieve the above object, the present invention provides an audio signal transmitting method, and the audio signal transmitting method includes the following steps:

Acquiring first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information;

Performing analog-to-digital conversion of the acquired first channel audio information and second channel audio information to obtain first audio information, and performing analog-to-digital conversion on the acquired third channel audio information and fourth channel audio information to obtain Second audio information, wherein the first audio information and the second audio information are data formats of a serial digital audio bus IIS protocol;

Performing an encoding operation on the first audio information and the second audio information to obtain information to be transmitted;

Controlling the transmitter to emit an audio signal based on the information to be transmitted.

Preferably, the step of performing the encoding operation on the first audio information and the second audio information based on the serial digital audio bus IIS protocol to obtain the information to be sent includes:

Obtaining left channel information and right channel information of the second audio information in each clock cycle respectively;

The data format based on the IIS protocol inserts left channel information of the second audio information every clock cycle between the left channel information and the right channel information of the first audio information in the same clock cycle, and each clock cycle The right channel information of the second audio information is inserted between the right channel information of the first audio information and the left channel information of the first audio information of the next clock cycle to generate the to-be-sent information.

Preferably, the data format of the first audio information is a standard data format of the IIS protocol or a left-aligned data format, and the data format of the second audio information is a right-aligned data format of the IIS protocol.

In addition, in order to achieve the above object, the present invention further provides an audio signal receiving method, where the audio signal receiving method includes the following steps:

Receiving an audio signal;

Performing digital-to-analog conversion of the received audio signal by using a first digital-to-analog converter based on the IIS protocol to obtain first channel audio information and second channel audio information;

The received audio signal is digital-analog converted by the second digital-to-analog converter based on the IIS protocol to obtain third channel audio information and fourth channel audio information.

In addition, in order to achieve the above object, the present invention further provides an audio signal transmitting apparatus, where the audio signal transmitting apparatus includes:

An acquiring module, configured to acquire first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information;

And an analog-to-digital conversion module, configured to perform analog-to-digital conversion on the acquired first channel audio information and second channel audio information to obtain first audio information, and the acquired third channel audio information and fourth channel audio information Performing analog-to-digital conversion to obtain second audio information, wherein the first audio information and the second audio information are data formats of a serial digital audio bus IIS protocol;

An encoding module, configured to perform an encoding operation on the first audio information and the second audio information to obtain information to be sent;

And a sending module, configured to control the transmitter to send an audio signal based on the information to be sent.

Preferably, the encoding module comprises:

And an acquiring unit, configured to separately acquire left channel information and right channel information of the second audio information in each clock cycle;

a coding unit, configured to insert, according to a data format of the IIS protocol, left channel information of the second audio information of each clock cycle between the left channel information and the right channel information of the first audio information of the same clock cycle, and Inserting the right channel information of the second audio information of each clock cycle between the right channel information of the first audio information and the left channel information of the first audio information of the next clock cycle in the same clock cycle, Generating the to-be-sent information.

The present invention acquires first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information, and then performs the acquired first channel audio information and second channel audio information. Analog-to-digital conversion to obtain first audio information, performing analog-to-digital conversion on the acquired third channel audio information and fourth channel audio information to obtain second audio information, and then pairing the first audio information and the second audio information Performing an encoding operation to obtain information to be transmitted, and finally transmitting the information to be transmitted, realizing transmitting data information of four channels through one transmitter, thereby avoiding generating data information of four channels by using two wireless transmitting modules. The mutual interference of the transmitted signals improves the audio effect of the home theater system, reduces the number of transmitters, and reduces the cost.

DRAWINGS

1 is a schematic flow chart of a first embodiment of an audio signal sending method according to the present invention;

2 is a timing diagram of first audio information of the present invention;

3 is a timing diagram of second audio information of the present invention;

4 is a timing diagram of information to be transmitted according to the present invention;

5 is a schematic flowchart of a process of encoding the first audio information and the second audio information in the second embodiment of the audio signal sending method according to the present invention;

6 is a schematic flow chart of a first embodiment of an audio signal receiving method according to the present invention;

FIG. 7 is a schematic diagram showing a refinement process of a digital-to-analog conversion step of an audio signal in a second embodiment of an audio signal receiving method according to the present invention; FIG.

Figure 8 is a schematic structural view of an embodiment of the present invention;

9 is a schematic diagram of functional modules of a first embodiment of an audio signal transmitting apparatus according to the present invention;

10 is a schematic diagram of a refinement function module of an encoding module in a second embodiment of an audio signal transmitting apparatus according to the present invention;

11 is a schematic diagram of functional modules of a first embodiment of an audio signal receiving apparatus according to the present invention;

FIG. 12 is a schematic diagram of a refinement function module of a digital-to-analog conversion module in a second embodiment of an audio signal receiving apparatus according to the present invention.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides an audio signal transmitting method. Referring to FIG. 1, FIG. 1 is a schematic flowchart diagram of a first embodiment of an audio signal sending method according to the present invention.

In this embodiment, the audio signal sending method includes:

Step S110, acquiring first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information;

The first channel audio information, the second channel audio information, the third channel audio information, and the fourth channel audio information are left channel surround audio information, right channel surround audio information, and left channel bass information, respectively. And the right channel bass information, of course, the first channel audio information, the second channel audio information, the third channel audio information, and the fourth channel audio information may also be left channel bass information, right channel bass information, respectively Left channel surround audio information and right channel surround audio information.

Step S120, performing analog-to-digital conversion on the acquired first channel audio information and second channel audio information to obtain first audio information, and performing analog-to-digital conversion on the acquired third channel audio information and fourth channel audio information. Obtaining second audio information, wherein the first audio information and the second audio information are both IIS ((Inter-IC) Sound, serial digital audio bus) data format of the protocol;

The IIS bus has three data signal lines: a frame clock data signal LRCK for switching data of the left and right channels, a frame clock data signal LRCK of "1" indicating that the data of the left channel is being transmitted, and the frame clock data signal LRCK When it is "0", it means that the data of the right channel is being transmitted; the bit clock BCK, that is, every bit of data corresponding to the digital audio, BCK has one pulse; the serial data DATA is the audio represented by the two's complement. Data, the data format of the IIS protocol can be divided into a left-aligned data format, a standard data format, and a right-aligned data format. In this embodiment, the first channel audio information and the second channel audio information are sent to the first analog-to-digital converter for analog-to-digital conversion, and the first audio information is obtained after the analog-to-digital conversion, wherein the first analog-to-digital conversion The data output format of the device is the standard data format of the IIS protocol or the left-aligned data format. The system word length is 33 bits, and the valid data bit is 16 bits, so that the data format of the first audio information is the standard data format of the IIS protocol or left. Align the data format, the system word length is 33 bits, and the valid data bit is also 16 bits, as shown in Figure 2. In the figure, DATA1 is the first audio information, and the data format is the standard data format of the IIS protocol, wherein the first audio The first bit and the 18th-33th bit of the information are invalid data; the third channel audio information and the fourth channel audio information are sent to the second analog to digital converter for analog to digital conversion, and after analog to digital conversion, The second audio information, the data output format of the second analog-to-digital converter is a right-aligned data format of the IIS protocol, so that the data format of the second audio information is a right-aligned data format of the IIS protocol, such as 3 As shown in the figure right-justified data DATA3 second audio format information, the data format for IIS protocol, wherein the first bit data of the second audio information 2-17 are invalid data.

Step S130, performing an encoding operation on the first audio information and the second audio information to obtain information to be sent;

In this embodiment, the first audio information and the second audio information obtained after the digital-to-analog conversion are sent to the encoder through the IIS bus, and the encoder outputs the left channel of the second audio information every clock cycle based on the data format of the IIS protocol. Information is inserted between the left channel information and the right channel information of the first audio information of the same clock cycle, and the right channel information of the second audio information of each clock cycle is inserted into the first audio of the same clock cycle. Between the right channel information of the information and the left channel information of the first audio information in the next clock cycle, the encoded data is the information to be transmitted, as shown in FIG. 4, where DATA3 is an encoder. The generated information to be sent has a system word length of 33 bits and a valid data bit of 32 bits.

Step S140: Send the information to be sent.

Specifically, the information to be sent is sent to the transmitter, and the transmitter transmits the received information to be sent.

In this embodiment, the first channel audio information, the second channel audio information, the third channel audio information, and the fourth channel audio information are acquired, and then the acquired first channel audio information and second channel audio information are acquired. Performing analog-to-digital conversion to obtain first audio information, performing analog-to-digital conversion on the acquired third channel audio information and fourth channel audio information to obtain second audio information, and then pairing the first audio information and the second audio The information is encoded to obtain information to be transmitted, and finally the information to be transmitted is transmitted, so that data information of four channels is transmitted through one transmitter, thereby avoiding data information of four channels transmitted by two wireless transmitting modules. The mutual interference of the transmitted signals increases the audio effect of the home theater system, reduces the number of transmitters, and reduces the cost.

A second embodiment of the audio signal transmitting method of the present invention is proposed based on the first embodiment. Referring to FIG. 5, in the embodiment, step S130 includes:

Step S131, respectively acquiring left channel information and right channel information of the second audio information in each clock cycle;

As shown in FIG. 3, the data when the frame clock data signal LRCK is "1" is the left channel information of the second audio information, and the frame clock data signal LRCK is "0". The data at the time is the right channel information of the second audio information. As shown in FIG. 2, the data when the frame clock data signal LRCK is "1" is the left channel information of the first audio information, and the frame clock data signal LRCK is "0". The data at the time is the right channel information of the first audio information.

Step S132, inserting left channel information of the second audio information of the same clock cycle into the left channel information of the first audio information based on the data format of the IIS protocol, and right channel information of the second audio information of the same clock cycle. Inserting the right channel information of the first audio information to generate the to-be-sent information.

As shown in FIG. 4, DATA3 in the figure is information to be transmitted generated by the encoder, and the system word length of the information to be transmitted is 33 bits, and the effective data bit is 32 bits, that is, in this embodiment, each clock cycle is The left channel information of the second audio information is filled in the 18th to 33rd bits of the first audio information when the same clock cycle LRCK is "1", and the right channel information of the second audio information is filled in the same time for each clock cycle. The 18th to 33rd bits in the first audio information when the clock cycle LRCK is "0". Of course, in this embodiment, the left channel information of the first audio information may be inserted into the left channel information of the second audio information of the same clock cycle, and the right channel information of the first audio information may be inserted into the second audio of the same clock cycle. The right channel information of the message before.

In this embodiment, the left channel information and the right channel information of the second audio information in each clock cycle are separately obtained; then the left channel information of the second audio information in the same clock cycle is based on the data format of the IIS protocol. After inserting the left channel information of the first audio information, and inserting the right channel information of the second audio information of the same clock cycle into the right channel information of the first audio information, to generate the to-be-sent information, Generating the to-be-sent information according to the first audio information and the second audio information encoding, so that the information to be transmitted can transmit the audio data information of four channels through one transmitter, thereby avoiding four channels by using two wireless transmitting modules. The data information produces mutual interference of the transmitted signals, and reduces the number of transmitters and reduces the cost.

The present invention further provides an audio signal receiving method. Referring to FIG. 6, FIG. 6 is a schematic flowchart diagram of a first embodiment of an audio signal receiving method according to the present invention.

In this embodiment, the audio signal receiving method includes:

Step S210, receiving an audio signal;

Step S220, performing digital-to-analog conversion on the received audio signal based on the serial digital audio bus IIS protocol to obtain first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information. .

In this embodiment, the received audio signal is digital-to-analog converted according to the IIS protocol, wherein the received audio signal is digital-analog converted by the first digital-to-analog converter based on the IIS protocol to obtain the first channel audio information, Second channel audio information, digital-to-analog conversion of the received audio signal by the second digital-to-analog converter based on the IIS protocol to obtain third channel audio information, fourth channel audio information; for example, in the received audio When the audio signal shown in FIG. 4 is signaled, the first digital-to-analog converter performs digital-to-analog conversion on the data of the 2-17th bit in the audio signal when the LRCK is "1" every clock cycle to obtain the first channel audio information. The second channel audio information is obtained by digital-to-analog conversion of the 2-17th bit of the audio signal when LRCK is "0" for each clock cycle, and the second digital-to-analog converter is "1" for each clock cycle LRCK. The data of the 18th to 33th bits in the audio signal is digital-to-analog converted to obtain the third-channel audio information, and the digital-to-analog conversion is performed for the data of the 18th to 33th bits in the audio signal when LRCK is "0" every clock cycle. Get the fourth sound Audio information.

In this embodiment, the audio signal is received; then the received audio signal is digital-to-analog converted based on the serial digital audio bus IIS protocol to obtain first channel audio information, second channel audio information, and third channel audio information. And the fourth channel audio information, the audio data information of four channels is obtained according to the received audio signal, and the process of decoding the multi-received audio signal is reduced by the IIS protocol, thereby improving the efficiency of receiving and receiving the audio signal. Reduce the number of receivers and reduce costs.

A second embodiment of the audio signal receiving method of the present invention is proposed based on the first embodiment. Referring to FIG. 7, in this embodiment, step S220 includes:

Step S221, performing digital-to-analog conversion on the received audio signal by using a first digital-to-analog converter based on a standard data format or a left-aligned data format of the IIS protocol to obtain first channel audio information and second channel audio information;

For example, when the received audio signal is the audio signal shown in FIG. 4, the first digital-to-analog converter performs digital-to-analog conversion on the 2-17th bit of the audio signal when the LRCK is "1" every clock cycle. The first channel audio information is digital-analog converted to the 2-17th bit of the audio signal when the LRCK is "0" every clock cycle to obtain the second channel audio information.

Step S222, performing digital-to-analog conversion on the received audio signal by using a second digital-to-analog converter based on the right-aligned data format of the IIS protocol to obtain third-channel audio information and fourth-channel audio information.

For example, when the received audio signal is the audio signal shown in FIG. 4, the second digital-to-analog converter performs digital-to-analog conversion on the data of the 18-33 bits in the audio signal when the LRCK is "1" every clock cycle. The third channel audio information is digital-to-analog converted to the data of the 18th to 33th bits in the audio signal when the LRCK is "0" every clock cycle to obtain the fourth channel audio information.

In this embodiment, the received audio signal is digital-analog converted by the first digital-to-analog converter by using a standard data format or a left-aligned data format based on the IIS protocol to obtain first channel audio information and second channel audio information; The right-aligned data format of the IIS protocol performs digital-to-analog conversion on the received audio signal through the second digital-to-analog converter to obtain third-channel audio information and fourth-channel audio information, and reduces the received audio through the IIS protocol. The process of decoding the signal improves the efficiency of audio signal transmission and reception.

In order to facilitate the understanding of the solution, the above embodiment is specifically described by taking a home theater system as an example. Referring to FIG. 8, the first channel audio information and the second channel audio information are obtained by the first performing analog-to-digital converter 100. The audio information, the third channel audio information, and the fourth channel audio information are obtained by the second analog-to-digital converter 200 to obtain the second audio information; and then the encoder 300 performs the encoding operation on the first audio information and the second audio information. To obtain the information to be transmitted, the transmitter 400 transmits the information to be transmitted; when the receiver 500 of the home theater system receives the audio signal, that is, the information to be transmitted transmitted by the transmitter 400, the first digital-to-analog converter 600 performs the received audio signal. Digital-to-analog conversion to obtain first channel audio information, second channel audio information, and second digital-to-analog converter 700 digital-to-analog the received audio signal to obtain third-channel audio information, fourth-channel audio information.

The present invention further provides an audio signal transmitting apparatus. Referring to FIG. 9, FIG. 9 is a schematic diagram of functional modules of a first embodiment of an audio signal transmitting apparatus according to the present invention.

In this embodiment, the audio signal sending apparatus includes:

The obtaining module 110 is configured to acquire first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information;

The analog-to-digital conversion module 120 is configured to perform analog-to-digital conversion of the acquired first channel audio information and second channel audio information to obtain first audio information, and the acquired third channel audio information and fourth channel audio The information is subjected to analog-to-digital conversion to obtain second audio information, wherein the first audio information and the second audio information are data formats of a serial digital audio bus IIS protocol;

The IIS bus has three data signal lines: a frame clock data signal LRCK for switching data of the left and right channels, a frame clock data signal LRCK of "1" indicating that the data of the left channel is being transmitted, and the frame clock data signal LRCK When it is "0", it means that the data of the right channel is being transmitted; the bit clock BCK, that is, every bit of data corresponding to the digital audio, BCK has one pulse; the serial data DATA is the audio represented by the two's complement. Data, the data format of the IIS protocol can be divided into a left-aligned data format, a standard data format, and a right-aligned data format. In this embodiment, the first channel audio information and the second channel audio information are sent to the first analog-to-digital converter for analog-to-digital conversion, and the first audio information is obtained after the analog-to-digital conversion, wherein the first analog-to-digital conversion The data output format of the device is the standard data format of the IIS protocol or the left-aligned data format. The system word length is 33 bits, and the valid data bit is 16 bits, so that the data format of the first audio information is the standard data format of the IIS protocol or left. Align the data format, the system word length is 33 bits, and the valid data bit is also 16 bits, as shown in Figure 2. In the figure, DATA1 is the first audio information, and the data format is the standard data format of the IIS protocol, wherein the first audio The first bit and the 18th-33th bit of the information are invalid data; the third channel audio information and the fourth channel audio information are sent to the second analog to digital converter for analog to digital conversion, and after analog to digital conversion, The second audio information, the data output format of the second analog-to-digital converter is a right-aligned data format of the IIS protocol, so that the data format of the second audio information is a right-aligned data format of the IIS protocol, such as 3 As shown in the figure right-justified data DATA2 to the second audio format information, the data format for IIS protocol, wherein the first bit data of the second audio information 2-17 are invalid data.

The encoding module 130 is configured to perform an encoding operation on the first audio information and the second audio information to obtain information to be sent.

In this embodiment, the first audio information and the second audio information obtained after the digital-to-analog conversion are sent to the encoder through the IIS bus, and the encoding module 130 rotates the left audio information of the second audio information every clock cycle based on the data format of the IIS protocol. The channel information is inserted between the left channel information and the right channel information of the first audio information of the same clock cycle, and the right channel information of the second audio information of each clock cycle is inserted into the same clock cycle. Between the right channel information of the audio information and the left channel information of the first audio information in the next clock cycle, the encoded data is the information to be transmitted, as shown in FIG. 4, where DATA3 is encoded. The information to be sent generated by the device, the system word length of the information to be transmitted is 33 bits, and the valid data bit is 32 bits.

The sending module 140 is configured to send the to-be-sent information.

Specifically, the sending module 140 sends the information to be sent to the transmitter, and the transmitter transmits the received information to be sent.

In this embodiment, the first channel audio information, the second channel audio information, the third channel audio information, and the fourth channel audio information are acquired by the obtaining module 110, and then the first channel audio that the analog to digital conversion module 120 will acquire is obtained. The information and the second channel audio information are subjected to analog-to-digital conversion to obtain first audio information, and the obtained third channel audio information and fourth channel audio information are analog-to-digital converted to obtain second audio information, and then the encoding module 130 Performing an encoding operation on the first audio information and the second audio information to obtain information to be transmitted, and finally sending the module 140 to send the information to be sent, thereby implementing data information of four channels transmitted through one transmitter, thereby avoiding adopting The two wireless transmitting modules emit four channels of data information to generate mutual interference of the transmitted signals, which improves the audio effect of the home theater system, reduces the number of transmitters, and reduces the cost.

A second embodiment of the audio signal transmitting apparatus of the present invention is proposed based on the first embodiment. Referring to FIG. 10, in the embodiment, the encoding module 130 includes:

The obtaining unit 131 is configured to separately acquire left channel information and right channel information of the second audio information in each clock cycle;

The encoding unit 132 is configured to insert the left channel information of the second audio information of the same clock cycle into the left channel information of the first audio information based on the data format of the IIS protocol, and to the right of the second audio information of the same clock cycle. The channel information is inserted after the right channel information of the first audio information to generate the to-be-sent information.

In this embodiment, the left channel information and the right channel information of the second audio information in each clock cycle are respectively acquired by the obtaining unit 131; then the encoding unit 132 performs the second audio of the same clock cycle based on the data format of the IIS protocol. After the left channel information of the information is inserted into the left channel information of the first audio information, and the right channel information of the second audio information of the same clock cycle is inserted into the right channel information of the first audio information, to generate the The sending of the information is implemented, and the information to be sent is generated according to the first audio information and the second audio information, so that the information to be transmitted can transmit the audio data information of four channels through one transmitter, thereby avoiding the use of two wireless transmissions. The module emits four channels of data information to generate mutual interference of the transmitted signals, and reduces the number of transmitters and reduces the cost.

The present invention further provides an audio signal receiving apparatus. Referring to FIG. 11, FIG. 11 is a schematic diagram of functional modules of a first embodiment of an audio signal receiving apparatus according to the present invention.

In this embodiment, the audio signal receiving apparatus includes:

The receiving module 210 is configured to receive an audio signal;

The digital-to-analog conversion module 220 is configured to perform digital-to-analog conversion on the received audio signal based on the serial digital audio bus IIS protocol to obtain first channel audio information, second channel audio information, third channel audio information, and Four channel audio information.

In this embodiment, the digital-to-analog conversion module 220 performs digital-to-analog conversion on the received audio signal according to the IIS protocol, wherein the digital-to-analog conversion module 220 performs digital-analog on the received audio signal by using the first digital-to-analog converter based on the IIS protocol. Converting to obtain first channel audio information, second channel audio information, performing digital-to-analog conversion on the received audio signal by using a second digital-to-analog converter based on the IIS protocol to obtain third channel audio information, fourth channel Audio information; for example, when the received audio signal is the audio signal shown in FIG. 4, the first digital-to-analog converter counts the data of the 2-17th bit in the audio signal when each clock cycle LRCK is "1" The first channel audio information is obtained by the mode conversion, and the second channel audio information is obtained by digital-to-analog conversion of the 2-17th bit data in the audio signal when each clock cycle LRCK is “0”, and the second digital-to-analog converter Digital-to-analog conversion of the 18-33-bit data in the audio signal when LRCK is "1" every clock cycle to obtain the third-channel audio information, and the audio signal is "0" when LRCK is "0" for each clock cycle. 18-33 Digital to analog conversion data to obtain a fourth channel audio information.

In this embodiment, the receiving module 210 receives the audio signal; then the digital-to-analog conversion module 220 performs digital-to-analog conversion on the received audio signal based on the serial digital audio bus IIS protocol to obtain the first channel audio information and the second channel audio. The information, the third channel audio information and the fourth channel audio information realize that four channels of audio data information are obtained according to the received audio signal, and the process of decoding the multi-received audio signal is reduced by the IIS protocol. Improve the efficiency of audio signal transmission and reception, reduce the number of receivers, and reduce costs.

A second embodiment of the audio signal receiving apparatus of the present invention is proposed based on the first embodiment. Referring to FIG. 12, in the embodiment, the digital-to-analog conversion module 220 includes:

The first digital-to-analog conversion unit 221 is configured to perform digital-to-analog conversion on the received audio signal by using a first digital-to-analog converter based on a standard data format or a left-aligned data format of the IIS protocol to obtain first channel audio information, and second. Channel audio information;

For example, when the received audio signal is the audio signal shown in FIG. 4, the first digital-to-analog conversion unit 221 performs digital-to-analog conversion on the data of the 2-17th bit in the audio signal when the LRCK is "1" every clock cycle. The first channel audio information is obtained, and the data of the 2-17th bit in the audio signal is digital-to-analog converted to the second channel audio information when the LRCK is "0" every clock cycle.

The second digital-to-analog conversion unit 222 is configured to perform digital-to-analog conversion on the received audio signal by using a second digital-to-analog converter based on the right-aligned data format of the IIS protocol to obtain third-channel audio information and fourth-channel audio information. .

For example, when the received audio signal is the audio signal shown in FIG. 4, the second digital-to-analog conversion unit 222 performs digital-to-analog conversion on the data of the 18-33 bits in the audio signal when each clock cycle LRCK is "1". The third channel audio information is obtained, and the data of the 18th to 33th bits in the audio signal is digital-analog converted to the fourth channel audio information when the LRCK is "0" every clock cycle.

In this embodiment, the first digital-to-analog conversion unit 221 performs digital-to-analog conversion on the received audio signal by using the first digital-to-analog converter based on the standard data format or the left-aligned data format of the IIS protocol to obtain the first channel audio information, Two-channel audio information; the second digital-to-analog conversion unit 222 performs digital-to-analog conversion on the received audio signal by using a second digital-to-analog converter based on the right-aligned data format of the IIS protocol to obtain third-channel audio information and fourth sound. The channel audio information reduces the process of decoding the received audio signal through the IIS protocol, and improves the efficiency of the audio signal transmission and reception.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims

An audio signal transmitting method, characterized in that the audio signal transmitting method comprises the following steps:

Acquiring first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information;

Performing analog-to-digital conversion of the acquired first channel audio information and second channel audio information to obtain first audio information, and performing analog-to-digital conversion on the acquired third channel audio information and fourth channel audio information to obtain Second audio information, wherein the first audio information and the second audio information are data formats of a serial digital audio bus IIS protocol;

Performing an encoding operation on the first audio information and the second audio information to obtain information to be transmitted;

Sending the to-be-sent information.
The audio signal transmitting method according to claim 1, wherein the step of encoding the first audio information and the second audio information based on the serial digital audio bus IIS protocol to obtain information to be transmitted comprises:

Obtaining left channel information and right channel information of the second audio information in each clock cycle respectively;

The data format based on the IIS protocol inserts the left channel information of the second audio information of the same clock cycle into the left channel information of the first audio information, and inserts the right channel information of the second audio information of the same clock cycle into the The right channel information of the first audio information is followed by the information to be transmitted.
The audio signal transmitting method according to claim 1, wherein the data format of the first audio information is a standard data format of the IIS protocol or a left-aligned data format, and the data format of the second audio information is an IIS protocol. Right-aligned data format.
The audio signal transmitting method according to claim 3, wherein the step of encoding the first audio information and the second audio information based on the serial digital audio bus IIS protocol to obtain information to be transmitted comprises:

Obtaining left channel information and right channel information of the second audio information in each clock cycle respectively;

The data format based on the IIS protocol inserts the left channel information of the second audio information of the same clock cycle into the left channel information of the first audio information, and inserts the right channel information of the second audio information of the same clock cycle into the The right channel information of the first audio information is followed by the information to be transmitted.
An audio signal receiving method, characterized in that the audio signal receiving method comprises the following steps:

Receiving an audio signal;

The standard data format or the left-aligned data format based on the IIS protocol performs digital-to-analog conversion on the received audio signal by the first digital-to-analog converter to obtain first channel audio information and second channel audio information;

The right-aligned data format based on the IIS protocol performs digital-to-analog conversion on the received audio signal by the second digital-to-analog converter to obtain third-channel audio information and fourth-channel audio information.
An audio signal transmitting apparatus, wherein the audio signal transmitting apparatus comprises:

An acquiring module, configured to acquire first channel audio information, second channel audio information, third channel audio information, and fourth channel audio information;

And an analog-to-digital conversion module, configured to perform analog-to-digital conversion on the acquired first channel audio information and second channel audio information to obtain first audio information, and the acquired third channel audio information and fourth channel audio information Performing analog-to-digital conversion to obtain second audio information, wherein the first audio information and the second audio information are data formats of a serial digital audio bus IIS protocol;

An encoding module, configured to perform an encoding operation on the first audio information and the second audio information to obtain information to be sent;

And a sending module, configured to send the to-be-sent information.
The audio signal transmitting apparatus according to claim 6, wherein the encoding module comprises:

And an acquiring unit, configured to separately acquire left channel information and right channel information of the second audio information in each clock cycle;

a coding unit, configured to insert left channel information of second audio information of the same clock cycle into left channel information of the first audio information, and right sound of second audio information of the same clock cycle, according to a data format of the IIS protocol The track information is inserted after the right channel information of the first audio information to generate the to-be-sent information.
The audio signal transmitting apparatus according to claim 6, wherein the data format of the first audio information is a standard data format of the IIS protocol or a left-aligned data format, and the data format of the second audio information is an IIS protocol. Right-aligned data format.
The audio signal transmitting apparatus according to claim 8, wherein the encoding module comprises:

And an acquiring unit, configured to separately acquire left channel information and right channel information of the second audio information in each clock cycle;

a coding unit, configured to insert left channel information of second audio information of the same clock cycle into left channel information of the first audio information, and right sound of second audio information of the same clock cycle, according to a data format of the IIS protocol The track information is inserted after the right channel information of the first audio information to generate the to-be-sent information.