WO2021004048A1

WO2021004048A1 - Display device and audio data transmission method

Info

Publication number: WO2021004048A1
Application number: PCT/CN2020/070902
Authority: WO
Inventors: 黄飞; 李见
Original assignee: 海信视像科技股份有限公司
Priority date: 2019-07-09
Filing date: 2020-01-08
Publication date: 2021-01-14
Also published as: WO2021004045A1; WO2021004046A1; WO2021004047A1; WO2021004049A1

Abstract

Disclosed are an audio processing method and device, and a display device. Sound source data is decoded into original audio data corresponding to each channel; and since the total number of channels is greater than the total number of channels of all the first I2S bus interfaces, the original audio data is encoded again according to preset encoding rules, and the original audio data of all the channels can be output via at least two first I2S bus interfaces.

Description

Display device and audio data transmission method

This patent application requires the application number of 201910614701.7 filed on July 9, 2019; the application number of 201910613160.6 filed on July 9, 2019; the application number of 201910613254.3 filed on July 9, 2019; The application number submitted on July 9, 2019 is 201910615836.5; the application number submitted on July 9, 2019 is 201910616404.6; the application number submitted on August 2, 2019 is 201910710346.3; on July 9, 2019 The priority of the Chinese patent application filed on July 22, 2019 with application number 2019106185413; application number 201910659488.1 filed on July 22, 2019, the full text of which is incorporated herein by reference.

Technical field

This application relates to the field of multimedia technology, in particular to a display device and a method for transmitting audio data.

Background technique

With the rapid development of multimedia technology, users have higher and higher requirements for the sound quality when playing audio on the terminal, and the single-channel or dual-channel playback effect can no longer meet the needs of users.

In the related art, in order to meet the user's demand for sound quality and improve user experience, the sound quality of the terminal when playing audio can be improved by connecting an external audio device that can achieve multi-channel playback effects.

However, when external audio equipment is connected, the terminal's own speakers cannot work, so a good audio-visual experience cannot be formed, and resources will be wasted.

Application content

The embodiments of the present application provide a display device and a method for transmitting audio data, which can solve the problem of requiring an external audio device to implement multi-channel audio playback in related technologies, which cannot form a better audio-visual experience and causes a waste of resources. The technical solution is as follows:

In some embodiments, an audio data transmission method is provided, which is applied to an audio sending end, and the audio sending end is connected to an audio receiving end through a plurality of first audio buses, and the method includes:

Acquire audio data of multiple channels, and the audio data of each channel has the same data bit width;

Encoding the audio data of the multiple channels to obtain multiple first audio signals corresponding to the multiple first audio buses, wherein each of the first audio signals includes at least one channel of audio data, And the number of audio data channels included in at least one of the first audio signals is greater than the rated number of channels;

Each channel of the first audio signal is transmitted to the audio receiving end through a corresponding one of the first audio bus.

In some embodiments, the encoding the audio data of the multiple channels includes:

According to the threshold value of the number of audio channels of the audio data that can be transmitted by the first audio bus in each sampling period, the audio data of the multiple channels are encoded to obtain multiple audio data corresponding to the multiple first audio buses. First audio signal;

Wherein, the number of audio channels of the audio data included in each channel of the first audio signal is less than or equal to the threshold of the number of channels, and the threshold of the number of channels is based on the data bit width and the sampling parameters of the first audio bus determine.

In some embodiments, the sampling parameters include: sampling bit width, sampling frequency, and sampling mode, and the sampling mode includes single-edge sampling or dual-edge sampling;

The threshold of the number of channels is equal to a product of the rated number of channels and at least one of the first ratio, the second ratio, and the sampling coefficient;

Wherein, the first ratio is the ratio of the sampling bit width to the data bit width, the second ratio is the ratio of the sampling frequency to the rated frequency, and the first ratio and the second ratio are Both are greater than or equal to 1; if the sampling mode is single-edge sampling, the sampling coefficient is 1, and if the sampling mode is dual-edge sampling, the sampling coefficient is 2.

In some embodiments, the sampling parameter includes: sampling bit width, and the encoding of the audio data of the multiple channels includes:

If the sampling bit width is a non-integer multiple of the data bit width, the audio data of the target channel is split according to the sampling bit width, and the split audio data is separated from the audio data of other channels. The data is combined, and the bit width of the combined audio data is the sampling bit width;

If the sampling bit width is an integer multiple of the data bit width, the audio data of at least two of the channels are combined, and the bit width of the combined audio data is the sampling bit width.

In some embodiments, the audio data of the multiple channels includes: left channel audio data, right channel audio data, left surround channel audio data, right surround channel audio data, left sky channel audio data, Right sky channel audio data, center audio channel audio data and subwoofer channel audio data;

The audio data of the target channel includes: at least one of the center sound channel audio data and the subwoofer channel audio data.

In some embodiments, a method for transmitting audio data is provided, which is applied to an audio receiving end, and the audio receiving end is connected to the audio sending end through a plurality of first audio buses, and is connected to the audio receiving end through a plurality of second audio buses. Two speakers are connected, the number of the second audio buses is greater than the number of the first audio buses, and the method includes:

Receiving multiple channels of first audio signals sent by the audio sending end through the multiple first audio buses, wherein each channel of the first audio signal includes at least one channel of audio data, and at least one channel of the first audio signal The number of channels of audio data included in the signal is greater than the number of rated channels;

According to the decoding method corresponding to the encoding method adopted by the audio sending end, the multiple channels of first audio signals are decoded to obtain multiple channels of second audio signals corresponding to the multiple second audio buses, wherein each The number of channels of audio data included in the second audio signal is less than or equal to the number of rated channels;

Each channel of the second audio signal is transmitted to the speaker connected to the second audio bus through a corresponding one of the second audio bus.

In some embodiments, the decoding the multiple channels of first audio signals to obtain multiple channels of second audio signals corresponding to the multiple channels of second audio buses includes:

Split and combine audio data of multiple channels included in the multiple channels of first audio signals according to the sampling bit width of the second audio bus to obtain the multiple channels of second audio signals;

Wherein, the data bit width of the audio data of each channel included in each channel of the second audio signal is the sampling bit width of the second audio bus.

In some embodiments, the decoding of the multiple channels of first audio signals includes:

In the process of receiving the multiple channels of first audio signals, decode the multiple channels of first audio signals; or, after receiving the multiple channels of first audio signals, perform the decoding on the multiple channels of first audio signals To decode.

In some embodiments, an audio data transmission device is provided, which is applied to an audio sending end, the audio sending end is connected to an audio receiving end through a plurality of first audio buses, and the device includes:

The acquisition circuit is used to acquire audio data of multiple channels, and the data bit width of the audio data of each channel is the same;

The encoding circuit is used to encode the audio data of the multiple channels to obtain multiple first audio signals corresponding to the multiple first audio buses, wherein each of the first audio signals includes at least one audio Channels of audio data, and the number of channels of audio data included in at least one of the first audio signals is greater than the number of rated channels;

The first audio signal transmission circuit is configured to transmit each channel of the first audio signal to the audio receiving end through a corresponding one of the first audio buses.

In some embodiments, an audio data transmission device is provided, which is applied to an audio receiving end, and the audio receiving end is connected to the audio sending end through multiple first audio buses, and is connected to the multiple audio data through multiple second audio buses. Two speakers are connected, the number of the second audio buses is greater than the number of the first audio buses, and the device includes:

The receiving circuit is configured to receive multiple channels of first audio signals sent by the audio sending end via the multiple first audio buses, wherein each channel of the first audio signal includes at least one channel of audio data, and at least one channel of audio data The number of audio channels of the audio data included in the first audio signal is greater than the number of rated channels;

The decoding circuit is used to decode the multiple channels of first audio signals according to the decoding method corresponding to the encoding method adopted by the audio sending end to obtain multiple channels of second audio signals corresponding to the multiple second audio buses. An audio signal, where the number of audio data channels included in each second audio signal is less than or equal to the rated number of channels;

The second audio signal transmission circuit is used to transmit each channel of the second audio signal to a speaker connected to the second audio bus through a corresponding one of the second audio buses.

In some embodiments, a playback device is provided, and the playback device includes: an audio sending end and an audio receiving end;

The audio sending end includes the audio data transmission device as described in the foregoing aspect;

The audio receiving end includes the audio data transmission device as described in the foregoing aspect.

The application also provides a display device, including:

The display screen is configured to present an image screen;

The speaker is configured to reproduce sound;

An audio processor configured to obtain audio data of multiple channels;

A controller configured to encode the audio data of the multiple channels to obtain multiple first audio signals;

Wherein each channel of the first audio signal includes at least one channel of audio data, and at least one channel of the first audio signal includes audio data with a number of channels greater than a rated channel number;

In some embodiments, the controller is configured to encode the audio data of the multiple channels according to the threshold value of the number of audio channels of the audio data that can be transmitted in each sampling period to obtain multiple first audio signals;

Wherein, the number of audio channels of the audio data included in each channel of the first audio signal is less than or equal to the threshold of the number of channels.

In some embodiments, the sampling bit width, sampling frequency, and sampling mode, the sampling mode includes single-edge sampling or dual-edge sampling;

The threshold of the number of channels is equal to a product of the rated number of channels and at least one parameter among the first ratio, the second ratio, and the sampling coefficient;

Wherein, the first ratio is the ratio of the sampling bit width to the data bit width, the second ratio is the ratio of the sampling frequency to the rated frequency, and the first ratio and the second ratio are Are greater than or equal to 1;

If the sampling mode is single-edge sampling, the sampling coefficient is 1, and if the sampling mode is dual-edge sampling, the sampling coefficient is 2.

In some embodiments, if the sampling bit width is a non-integer multiple of the data bit width, the audio data of the target channel is split according to the sampling bit width, and the audio data obtained by the split is separately Combine with audio data of other channels, and the bit width of the combined audio data is the sampling bit width;

The application also provides a display device, including:

The display screen is configured to present an image screen;

The speaker is configured to reproduce sound;

The audio processor is configured to receive multiple channels of first audio signals, where each channel of the first audio signal includes at least one channel of audio data, and at least one channel of the first audio signal includes audio data More than the number of rated channels;

A controller configured to decode the multiple channels of first audio signals to obtain multiple channels of second audio signals, and transmit them to the speaker;

Wherein, the number of audio data channels included in each second audio signal is less than or equal to the rated number of channels;

Transmitting each channel of the second audio signal to the speaker.

The beneficial effects brought about by the technical solution provided in this application can at least include:

In summary, the embodiments of the present application provide a display device and a method for transmitting audio data. Since the audio sending end decodes the acquired audio data of the multiple channels, the number of audio data channels included in at least one of the obtained multiple first audio signals is greater than the rated number of channels. Therefore, without external audio equipment, more channels of audio data can be transmitted to the audio receiving end, so that the audio receiving end can transmit more channels of audio data to the speaker to achieve multi-channel playback.

It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the application.

Description of the drawings

In order to explain the embodiments of the present application more clearly, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. Ordinary technicians can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of an implementation environment involved in an audio data transmission method provided by an embodiment of the present application;

2 is a signal timing diagram of an audio bus provided by an embodiment of the present application;

FIG. 3 is a flowchart of a method for transmitting audio data provided by an embodiment of the present application;

4 is a flowchart of another audio data transmission method provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of encoding audio data provided by an embodiment of the present application;

Figure 6 is a schematic diagram of another audio data encoding provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of another audio data encoding provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of still another audio data encoding provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of still another audio data encoding provided by an embodiment of the present application;

10 is a schematic structural diagram of a method for transmitting audio data provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of the internal structure of an audio sending end provided by an embodiment of the present application;

FIG. 12 is a flowchart of yet another audio data transmission method provided by an embodiment of the present application;

FIG. 13 is a flowchart of yet another audio data transmission method provided by an embodiment of the present application;

FIG. 14 is a schematic diagram of decoding audio data provided by an embodiment of the present application;

15 is a schematic diagram of another audio data decoding provided by an embodiment of the present application;

FIG. 16 is a schematic diagram of another audio data decoding provided by an embodiment of the present application;

FIG. 17 is a flowchart of yet another audio data transmission method provided by an embodiment of the present application;

18 is a schematic diagram of data processing of audio data provided by an embodiment of the present application;

FIG. 19 is a schematic diagram of data processing of another audio data provided by an embodiment of the present application;

20 is a block diagram of an audio data transmission device provided by an embodiment of the present application;

21 is a block diagram of another audio data transmission device provided by an embodiment of the present application;

Figure 22 is a schematic structural diagram of a playback device provided by an embodiment of the present application;

FIG. 23 is a schematic diagram of a display device provided by an embodiment of the present application;

FIG. 24 is a block diagram of the hardware configuration of a display device provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of an implementation environment involved in an audio data transmission method provided by an embodiment of the present application. As shown in FIG. 1, the implementation environment may include: an audio sending end 10, an audio receiving end 20, and multiple speakers 30. For example, FIG. 1 shows eight speakers 30.

1, one end of the audio sending terminal 10 can be connected to the sound source S1, the other end can be connected to one end of the audio receiving terminal 20 through multiple first audio buses L1, and the other end of the audio receiving terminal 20 can be connected through multiple The second audio bus L2 is connected to a plurality of speakers 30, and a power amplifier (AMP) 40 may also be connected between the audio receiving terminal 20 and the speakers 30.

The audio sending end 10 may include a decoder 101 and a re-encoder 102. The decoder 101 may decode the compressed audio data sent by the sound source S1 to obtain audio data of multiple channels and send it to the re-encoder 102 . The re-encoder 102 may re-encode the audio data of the multiple channels, and send it to the audio receiving terminal 20 through the first audio bus L1. The audio receiving terminal 20 can decode the received audio data of multiple channels, and after being amplified by the AMP 40, transmit it to the speaker 30 through the second audio bus L2, so as to realize the transmission of audio data of multiple channels.

For example, referring to FIG. 1, the audio sending end 10 can be connected to one end of the audio receiving end 20 through three first audio buses L1, and the other end of the audio receiving end 20 can be connected to five second audio buses L2 and five AMP 40 one by one. Corresponding connection. And each AMP 40 can be connected to one or two speakers 30.

In some embodiments, the audio transmitting terminal 10 may be a core terminal of a terminal, the audio receiving terminal 20 may be an XMOS chip provided in the terminal, and the audio receiving terminal 20 may also be called a co-audio processor. The first audio bus L1 and the second audio bus L2 may be an integrated circuit built-in audio bus (inter-IC sound, I2S). The terminal can be a television, computer, or mobile phone.

Limited by cost and algorithm complexity, the audio sending end 10 can currently support up to 3 I2S channels, that is, the audio sending end 10 can be connected to the audio receiving end 20 through up to three first audio buses L1. Since one speaker 30 can receive audio data of two channels (channels, ch) at most, currently each first audio bus L1 can only transmit 2ch audio data (that is, the rated channel of each first audio bus L1). The number can be 2). Correspondingly, the three first audio buses L1 can only realize up to 6ch audio data transmission, which has greater limitations and poor sound quality.

The audio sending end 10 in the foregoing implementation environment described in the embodiments of the present application may encode audio data of multiple channels through the re-encoder 102 to obtain multiple first audio buses that correspond one-to-one to the multiple first audio buses L1. Audio signal, and send a corresponding first audio signal to the audio receiving terminal 20 through each first audio bus L1. Since the number of audio data channels included in the encoded at least one first audio signal is greater than the number of rated channels, audio data transmission of more than 6 channels can be realized, for example, 8 channels (that is, the sound format is 5.1.2) can be realized Audio data transmission.

FIG. 2 is a timing diagram of various I2S signals provided by an embodiment of the present application. It can be seen with reference to FIG. 2 that the I2S signal may include: the frame clock WS, the serial clock BCLK, and the serial data SDATA.

Among them, each pulse of the serial clock BCLK corresponds to one bit of audio data, and the frequency of BCLK satisfies: 2 × sampling frequency × sampling bit width. For example, when the sampling frequency is 48 kilohertz (KHZ) and the sampling bit width is 16 bits (bit), the frequency of the BCLK is: 2×16×48=1.536 megahertz (MHz). The frame clock WS is used to indicate the audio data of the left and right channels, where WS is the first potential to indicate that the channel of the audio data being transmitted is the left channel (ie L_ch as shown in Figure 2); WS is the second potential. It means that the channel of the audio data being transmitted is the right channel (that is, R_ch shown in Figure 2), and the frequency of WS can be equal to the sampling frequency. The first potential may be a high potential relative to the second potential, or the first potential may be a low potential relative to the second potential. The serial data SDATA is audio data expressed in twos complement.

In addition to the above signals, in order to make the data transmission synchronization better, the I2S signal may also include the master clock MCLK, and the frequency of the master clock MCLK may be 256 times or 384 times the sampling frequency. For example, assuming that the sampling frequency is 48KHZ and the frequency of the main clock MCLK is 256 times the sampling frequency, the frequency of the main clock MCLK can be: 48×256=12.288 MHz.

It should be noted that when I2S collects audio data, it always starts from the high-order data, and in order to make the effective number of bits that can be processed by the audio transmitting end 10 and the audio receiving end 20 can be different, no matter how many bits the I2S signal has valid data.

As shown in Figure 2, the highest bit of the serial data SDATA always appears at the second BCLK pulse after the WS change (that is, the start of a frame). In this way, the effective number of bits of the audio transmitting terminal 10 and the audio receiving terminal 20 can be made different. If the effective number of bits that can be processed by the audio sending end 10 is less than the effective number of bits that can be processed by the audio receiving end 20, correspondingly, the excess low-bit data in the collected audio data can be discarded. If the effective number of bits that can be processed by the audio sending end 10 is more than the effective number of bits that can be processed by the audio receiving end 20, the remaining number of bits can be automatically supplemented accordingly. This synchronization mechanism makes the connection between the audio sending end 10 and the audio receiving end 20 more convenient, and can ensure that the transmitted audio data will not be misaligned.

In some embodiments, currently under a unified I2S interface, there are multiple different data formats. For example, according to the position of SDATA relative to WS and BCLK, it can be divided into left-justified, right-justified and I2S format. For example, Figure 2 shows 16bit left justification, 20bit left justification, 24bit left justification, and 24bit right justification. Moreover, in order to ensure the correct transmission of audio data, the audio sending end 10 and the audio receiving end 20 may use the same data format and length. For the I2S format, the data length can be different. WS can change on the rising or falling edge of BCLK, and the timing of WS does not need to be completely symmetrical.

FIG. 3 is a flow chart of a method for transmitting audio data provided by an embodiment of the present application. The method can be applied to the audio transmitting terminal 10 shown in FIG. 1. Referring to FIG. 1, the audio transmitting terminal 10 may pass multiple first The audio bus L1 is connected to the audio receiving terminal 20. As shown in Figure 3, the method may include:

Step 301: Acquire audio data of multiple channels.

In the embodiment of the present application, the audio sending terminal 10 may obtain the compressed audio data sent by the sound source S1, or may also obtain the compressed audio data sent by other devices (such as external audio equipment). After that, the decoder 101 in the audio sending terminal 10 may decode the acquired audio data to obtain audio data of multiple channels. Wherein, the data bit width of the audio data of each channel may be the same, and may be the same as the initial sampling bit width of the first audio bus.

Step 302: Encode audio data of multiple channels to obtain multiple first audio signals corresponding to multiple first audio buses.

In the embodiment of the present application, each channel of the first audio signal may include at least one channel of audio data, and the number of channels of the audio data included in the at least one channel of the first audio signal may be greater than the rated channel number.

Wherein, the rated number of channels may be the number of channels of audio data that can be received by a speaker. Since the number of channels of audio data that can be received by a speaker is 2, the rated number of channels is 2. Correspondingly, at least one first audio signal may include audio data of more than 2 channels. Compared with the first audio signal in the related art that each channel of the first audio signal includes at most 2ch of audio data, the audio data transmission method provided in the embodiment of the present application can implement audio data transmission of more channels.

Step 303: Transmit each first audio signal to the audio receiving end through a corresponding first audio bus.

For example, assuming that the audio sending end 10 obtains three first audio signals after encoding the audio data of multiple channels, the audio sending end 10 may each of the three first audio signals , Which is transmitted to the audio receiving terminal 20 through a corresponding first audio bus L1. The audio receiving terminal 20 may decode the received encoded audio data and transmit it to the speaker 30 through multiple second audio buses L2, thereby realizing the transmission of multi-channel audio data.

In summary, the embodiment of the present application provides a method for transmitting audio data. Since the audio sending end decodes the acquired audio data of the multiple channels, the number of audio data channels included in at least one of the obtained multiple first audio signals is greater than the rated number of channels. Therefore, without external audio equipment, more channels of audio data can be transmitted to the audio receiving end, so that the audio receiving end can transmit more channels of audio data to the speaker to achieve multi-channel playback.

FIG. 4 is a flowchart of another audio data transmission method provided by an embodiment of the present application, and the method can be applied to the audio sending end 10 shown in FIG. 1. As shown in Figure 4, the method may include:

Step 401: Acquire audio data of multiple channels.

In the embodiment of the present application, the audio sending terminal 10 may obtain the compressed audio data sent by the sound source S1 in the terminal when the terminal is playing an audio and video file containing audio data. Alternatively, the terminal can also obtain compressed audio data sent by other devices (such as external audio equipment). After that, the decoder 101 in the audio sending terminal 10 can decode the acquired audio data to obtain audio data of multiple channels. The data bit width of the audio data of each channel can be the same, and the data bit width can be equal to the initial sampling bit width of the first audio bus.

In some embodiments, it is assumed that when the terminal is playing a video, the sound source S1 sends audio data including eight channels. Accordingly, the audio sending end 10 can decode the audio data sent by the sound source S1 through the decoder 101 Obtain eight channels of audio data. Assuming that the initial sampling bit width of the first audio bus L1 is 16 bits, the data bit width of the audio data of each channel can be 16 bits.

In some embodiments, the eight channels of audio data may include: left channel audio data L, right channel audio data R, left surround channel audio data SL, right surround channel audio data SR, left sky sound Channel audio data TOPL, right sky channel audio data TOPR, center audio channel audio data Center, and subwoofer channel audio data Woofer. The embodiment of the present application does not limit the number of audio channels of the audio data acquired by the audio sending end 10 and the audio data type of each channel.

Step 402: Determine a threshold value of the number of channels of audio data that can be transmitted by the first audio bus in each sampling period.

In the embodiment of the present application, the threshold of the number of channels may be determined according to the data bit width and the sampling parameters of the first audio bus. Among them, the sampling parameters of the first audio bus L1 may include: sampling bit width, sampling frequency, and sampling mode. The sampling mode may include single-edge sampling (that is, only collecting audio data at the rising or falling edge of the pulse) or double-edge sampling ( That is, the rising and falling edges of the pulse collect audio data).

Wherein, the channel number threshold N1 may be equal to the product of the rated channel number N0 and at least one parameter among the first ratio w1, the second ratio w2, and the sampling coefficient w3. The first ratio w1 may be the ratio of the sampling bit width to the data bit width; the second ratio w2 may be the ratio of the sampling frequency to the rated frequency. And the first ratio w1 and the second ratio w2 may both be greater than or equal to 1. If the sampling mode is single-edge sampling, the sampling coefficient w3 may be 1, and if the sampling mode is dual-edge sampling, the sampling coefficient w3 may be 2. The number of rated channels N0 can be the number of channels of audio data that a speaker can receive. Since the number of channels of audio data that the speaker can receive is 2, the number of rated channels N0 can be considered as 2.

It should be noted that the sampling parameters of the first audio bus L1 are all preset in the terminal, and in order to realize multi-channel audio data transmission, at least one of the sampling parameters of the first audio bus L1 may be It is obtained by adjusting the initial sampling parameters of the first audio bus L1.

In the embodiment of the present application, the channel number threshold N1 may be equal to the product of the rated channel number N0 and the first ratio w1, the second ratio w2, and the sampling coefficient w3 of a parameter greater than 1. After the sampling bit width is adjusted, the first ratio w1 will be greater than 1; after the sampling frequency is adjusted, the second ratio w2 will be greater than 1; the sampling method is double-edge sampling, and the sampling coefficient w3 will be greater than 1. Therefore, if the sampling method is single-edge sampling, the channel number threshold N1 is the product of the rated channel number N0 and the first ratio w1 and the second ratio w2 of the parameter greater than 1. When the sampling method is double-edge sampling, The channel number threshold N1 is the product of the rated channel number N0, the sampling coefficient w3, and the first ratio w1 and the second ratio w2 of the parameter greater than 1.

For example, assuming that the sampling mode of the first audio bus L1 is single-edge sampling, if only the sampling bit width in the sampling parameters of the first audio bus L1 is obtained by adjusting the initial sampling bit width of the first audio bus L1, then The channel number threshold N1 may be equal to the product of the rated channel number N0 and the first ratio w1, that is, the channel number threshold N1 may satisfy: N1=N0×w1. If only the sampling frequency of the sampling parameters of the first audio bus L1 is obtained by adjusting the initial sampling frequency of the first audio bus L1, the channel number threshold N1 can be equal to the rated channel number N0 and the second ratio w2 The product of, that is, the channel number threshold N1 can satisfy: N1=N0×w2. If the sampling frequency and sampling bit width in the sampling parameters of the first audio bus L1 are obtained by adjusting the initial sampling parameters of the first audio bus L1, the channel number threshold N1 can be equal to the rated channel number N0 The product of the first ratio w1 and the second ratio w2, that is, the channel number threshold N1 can satisfy: N1=N0×w1×w2.

Assuming that the sampling mode of the first audio bus L1 is double-edge sampling, if the sampling parameters of the first audio bus L1 are all initial sampling parameters, the channel number threshold N1 can be equal to the number of channels N0 and the sampling coefficient w3. The product, that is, the channel number threshold N1 can satisfy: N1=N0×w3. If only the sampling bit width in the sampling parameters of the first audio bus L1 is obtained by adjusting the initial sampling bit width of the first audio bus L1, the channel number threshold N1 can be equal to the rated channel number N0 and the first The product of the ratio w1 and the sampling coefficient w3, that is, the channel number threshold N1 can satisfy: N1=N0×w1×w3.

If only the sampling frequency of the sampling parameters of the first audio bus L1 is obtained by adjusting the initial sampling frequency of the first audio bus L1, the channel number threshold N1 can be equal to the rated channel number N0 and the second ratio w2 And the product of the sampling coefficient w3, that is, the channel number threshold N1 can satisfy: N1=N0×w2×w3.

If the sampling frequency and sampling bit width in the sampling parameters of the first audio bus L1 are both obtained by adjusting the initial sampling parameters of the first audio bus L1, the channel number threshold N1 can be equal to the rated channel number N0 and The product of the first ratio w1, the second ratio w2, and the sampling coefficient w3, that is, the channel number threshold N1 can satisfy: N1=N0×w1×w2×w3.

The initial sampling bit width of the first audio bus L1 is 16bit, that is, the data bit width is 16bit, the initial sampling frequency is 48KHZ, the initial sampling method is single-edge sampling, the sampling coefficient w3 is 1, the rated channel number N0 is 2, and the rated The frequency is 48KHZ as an example, and the above-mentioned embodiment will be described as an example:

As an implementation in some embodiments, the initial sampling frequency can be kept unchanged and the initial sampling bit width can be increased. For example, referring to FIG. 5, the initial sampling bit width of the first audio bus L1 can be increased from 16 bits to 24 bits on the premise that the initial sampling frequency of the first audio bus L1 remains unchanged at 48KHZ, that is, the first audio bus L1 The sampling bit width is 24bit, and the sampling frequency is 48KHZ. Then the first ratio w1 is 1.5; the second ratio w2 is 1, and the channel number threshold N1 is: N1=N0×w1=2×1.5=3, that is, each first audio bus L1 can transmit at most 3ch Audio data, correspondingly, can ensure that the three first audio buses L1 can transmit up to 9ch of audio data.

For example, referring to Figure 6, it is possible to increase the initial sampling bit width of the first audio bus L1 from 16 bits to 32 bits on the premise that the initial sampling frequency of the first audio bus L1 remains unchanged at 48KHZ, that is, the first audio bus The sampling bit width of L1 is 32bit and the sampling frequency is 48KHZ. Then the first ratio w1 is 2, the second ratio w2 is 1, and the channel number threshold N1 is: N1=N0×w1=2×2=4. That is, each first audio bus L1 can transmit up to 4ch of audio data. Correspondingly, it can be ensured that the three first audio buses L1 can transmit up to 12ch of audio data, and the two first audio buses L1 can transmit 8ch of audio data. Therefore, to realize 8ch audio data transmission, referring to Fig. 6, only two first audio buses L1 need to be set up, which saves costs, and since most of the audio sending ends 10 currently have two first audio buses L1, Therefore, the compatibility is also strong.

In some embodiments, the initial sampling bit width can be kept unchanged, and the initial sampling frequency can be increased. For example, referring to Figures 7 and 8, the initial sampling frequency of 48KHZ can be increased to 96KHZ while keeping the initial sampling bit width of 16bit unchanged. That is, the sampling bit width of the first audio bus L1 is 16bit and the sampling frequency is 96KHZ, then the first ratio w1 is 1, the second ratio w2 is 2, and the channel number threshold N1 is: N1=N0×w2 =2×2=4. That is, each first audio bus L1 can transmit 4ch audio data at most. Correspondingly, it can be guaranteed that the three first audio buses L1 can transmit up to 12ch of audio data, and the two first audio buses L1 can transmit up to 8ch of audio data.

In some embodiments, the initial sampling bit width of the first audio bus L1 and the initial sampling frequency of the first audio bus L1 may be increased. For example, the sampling frequency of the first audio bus L1 may be adjusted to an integer multiple of the initial sampling frequency. Referring to Figure 9, the initial sampling bit width can be increased from 16bit to 24bit, and the initial sampling frequency from 48KHZ to 96KHZ. Correspondingly, the sampling bit width of each first audio bus L1 is 24bit, and the sampling frequency is 96KHZ, then the first ratio w1 is 1.5, the second ratio w2 is 2, and the channel number threshold N1 is: N1 =N0×w1×w2=2×1.5×2=6. Each first audio bus L1 can transmit up to 6ch audio data. Correspondingly, it can be ensured that the two first audio buses L1 can transmit up to 12 channels of audio data. For audio data transmission with more than 8ch channels, the adaptability is wider.

In some embodiments, the initial sampling bit width and the initial sampling frequency can be kept unchanged, and only the initial sampling mode is adjusted from single-edge sampling to double-edge sampling, that is, w3 is 2, correspondingly, the initial sampling bit width is 16bit And under the premise of the initial sampling frequency of 48KHZ, the channel number threshold N1 can also be made: N1=N0×w3=2×2=4, that is, each first audio bus L1 can transmit up to 4ch of channel data .

It should be noted that the above-mentioned sampling parameter adjustment method is only an example. To realize audio data transmission with more channels, the sampling parameters of the first audio bus L1 can be adjusted according to the requirement of the number of channels.

Step 403: According to the threshold value of the number of audio channels of the audio data that can be transmitted by the first audio bus in each sampling period, the audio data of the multiple channels are encoded to obtain multiple first audio buses corresponding to the multiple first audio buses. audio signal.

In the embodiment of the present application, after the audio sending end 10 determines the threshold of the number of channels that can be transmitted by the first audio bus L1 in each sampling period, a preset algorithm can be used to compare the acquired audio data of multiple channels. Split and combine to obtain multiple first audio signals. Wherein, the number of audio channels of the audio data included in each channel of the first audio signal may be less than or equal to the threshold of the number of channels.

Among them, if the adjusted sampling bit width of the first audio bus is a non-integer multiple of the data bit width, the audio data of the target channel can be split according to the sampling bit width, and the split audio data can be divided with The audio data of other channels are combined, and the bit width of the combined audio data may be the sampling bit width. If the sampling bit width is an integer multiple of the data bit width, the audio data of at least two channels can be combined, and the bit width of the combined audio data is the sampling bit width.

In some embodiments, the audio data of the target channel includes at least one of center channel audio data Center and subwoofer channel audio data Woofer. Since the center channel audio data Center and the subwoofer channel audio data Woofer are secondary sounds relative to the audio data of other channels, the secondary sounds are split to avoid the acquired primary sounds (such as the main sound). Channel, surround sound or sky sound) is missing or wrong, to ensure the reliability of multi-channel audio data transmission.

Take the data bit width as 16bit, the rated frequency as 48KHZ, and the sampling method as single-edge sampling.

In some embodiments, as shown in Figures 5 and 9, the sampling bit width of the first audio bus L1 is 24 bits. Since the sampling bit width of 24 bits is 1.5 times (that is, non-integer multiples) of the data bit width of 16 bits, the audio transmission The terminal 10 can split the audio data of the target channel according to 24 bits, and combine the split audio data with the audio data of other channels, and make the bit width of the combined audio data the sampling bit width.

That is, the encoding method of the audio sending end 10 can be: in the first half of each sampling period, the 16-bit audio data of one ch is combined, and the low 8bit audio data of 1ch after the splitting is performed in each sampling period. In the second half of the sampling period, the 16-bit audio data of one ch is combined, and the high 8bit audio data of the split 1ch is combined.

In some embodiments, referring to FIG. 5, it is assumed that the threshold of the number of channels of each first audio bus L1 is 3, and the audio sending end 10 obtains a total of 9 ch audio data from ch0 to ch8, where ch1, ch4, and ch7 are targets Soundtrack. Referring to FIG. 5, the audio sending end 10 can split the audio data of each ch of ch1, ch4, and ch7 into two pieces of data of low 8bit and high 8bit. After that, the two pieces of data after ch1 can be split, the low 8bit piece of data is combined with the 16bit audio data of ch0, and the high 8bit piece of data is combined with the 16bit audio data of ch2 to obtain a first audio signal.

Among them, the bit width of the audio data after the combination of the lower 8bit data of ch0 and ch1 is 24bit, and the bit width of the audio data after the combination of ch2 and the higher 8bit data of ch1 is 24bit. In the same way, the two pieces of data split from ch4 can be combined with ch3 and ch5 to form a first audio signal, and the two pieces of data split from ch7 are combined with ch6 and ch8 to form a first audio signal. Correspondingly, three channels of first audio signals are obtained after encoding, and each channel of the first audio signals includes audio data of 3 channels.

For example, referring to Figure 9, assuming that the threshold of the number of channels of each first audio bus L1 is 4, the audio sending end 10 obtains L, R, C, LFE, Rs, Ls, Lfh, and Rfh a total of 8 channels of audio data, Lfh And Rfh are the target channels, refer to Figure 9, the audio transmitter 10 can split the audio data of each ch in Lfh and Rfh into two pieces of low 8bit and high 8bit data, and split the two pieces of Lfh. Segment data, a segment of low 8bit data is combined with 16bit audio data of L channel, a segment of high 8bit data is combined with 16bit audio data of R channel; two segments of data after splitting Rfh, a segment of low 8bit data is combined with C The 16bit audio data of the channel is combined, and a segment of high 8bit data is combined with the 16bit audio data of the LFE channel to obtain a first audio signal. The audio data of the remaining channels are combined into a first audio signal.

In some embodiments, referring to FIG. 6, the sampling bit width of the first audio bus L1 is 32 bits, and referring to FIGS. 7 and 8, the sampling bit width of the first audio bus L1 is 16 bits. Since the sampling bit width of 16bit is 1 times (ie, an integer multiple) of the data bit width of 16bit, the sampling bit width of 32bit is 2 times (ie, an integer multiple) of the data bit width of 16bit. Therefore, for FIG. 6, the audio sending end 10 may combine audio data of at least two channels according to 16 bits, and the bit width of the combined audio data is the sampling bit width. With respect to Figures 7 and 8, the audio sending end 10 can combine audio data of at least two channels based on 32 bits, and the bit width of the combined audio data is the sampling bit width. That is, the encoding method of the audio sending end 10 can be: the combination of two 1ch 16bit audio data in the first half of each sampling period, and the combination of the second half of each sampling period. Two 1ch 16bit audio data.

For example, referring to Figures 6 and 8, assuming that the threshold of the number of channels of each first audio bus L1 is 4, the audio sending end 10 obtains a total of 8 channels of L, R, C, LFE, Rs, Ls, Lfh, and Rfh. For audio data, refer to Figures 6 and 8. The audio transmitter 10 can combine the audio data of the 4 channels of L, R, C, and LFE into a first audio signal in each sampling period, and combine Rs, Ls, The audio data of 4 channels of Lfh and Rfh is combined into a first audio signal. Accordingly, after encoding, a total of two first audio signals are obtained, and each of the first audio signals includes 4ch audio data.

Similarly, referring to Figure 7, assuming that the threshold of the number of channels of each first audio bus L1 is 4, and the audio sending end 10 obtains a total of 12 channels of audio data from ch0 to ch11, referring to Fig. 6, the audio sending end 10 can set ch0 Combine the audio data of 4 channels to ch3 into a first audio signal, combine the audio data of 4 channels from ch4 to ch7 into a first audio signal, and combine the audio data of 4 channels from ch8 to ch11 The first audio signal is combined into one channel. Accordingly, after encoding, a total of three channels of first audio signal are obtained, and each channel of the first audio signal includes 4ch audio data.

It should be noted that the embodiment of the present application does not limit the splitting and combining manners of the audio data of multiple channels by the audio sending end 10.

Step 404: Transmit each channel of the first audio signal to the audio receiving end through a corresponding first audio bus.

In the embodiment of the present application, the audio sending end 10 may transmit each encoded first audio signal to the audio receiving end 20 through a corresponding first audio bus L1. The audio receiving terminal 20 may pre-store the encoding method of the audio transmitting terminal 10, and accordingly, the audio receiving terminal 20 may decode the received multiple first audio signals according to the pre-stored encoding method, and pass the first audio signal. The second audio bus L2 is all transmitted to the speaker 30 to realize multi-channel audio data transmission.

In some embodiments, as shown in FIG. 5, the audio sending end 10 encodes the acquired audio data of the channel to obtain a total of three channels of first audio signals, and each channel of the first audio signal includes 3 channels of audio data in total. Correspondingly, the audio sending end 10 can transmit each channel of the first audio signal to the audio sending end 20 through the corresponding first audio bus L1.

In some embodiments, as shown in FIG. 10, the audio sending end 10 may include an application layer, a hardware abstraction layer (HAL), a driver layer, and a bottom layer (hardware). In practical applications, the application layer can send audio data transmission instructions to the hardware abstraction layer after starting the multi-channel application. After the hardware abstraction layer receives the audio data transmission instruction, it can run the relevant code for multi-channel audio data transmission, thereby driving the driver layer to detect the audio device connected to the underlying hardware. For example, the audio device may be a USB device.

In some embodiments, when the driver layer detects an audio device, the audio device can input the audio file (ie, the original audio data shown in FIG. 10) to the audio sending terminal 10. The audio sending end 10 can decode the original audio data through the decoder 101 to obtain audio data of multiple channels (such as 8ch audio data) and store it in the bottom layer, for example, can be stored in a memory. Then, the driver layer can inform the hardware abstraction layer of the audio devices detected by the bottom layer. At this time, the hardware abstraction layer can send an audio data transmission request to the application layer to ask the application layer whether to send audio data.

After the hardware abstraction layer receives the application layer's response instruction indicating the transmission of audio data, it can send the encoding method of the multi-channel audio data (that is, the relevant code for audio data transmission) to the driver layer. The driver layer may further encode the audio data of multiple channels stored in the bottom layer according to the encoding method (that is, perform the above step 403). After the encoding process, it can be transmitted to the external device through the first audio bus L1. The external device may be the audio receiving terminal 20, or may also be a speaker 30.

It should be noted that, referring to FIG. 11, the audio sending end 10 may also include an audio processor (Data Acquisition and Processing, DAP). The DAP can be connected to the decoder 101 and the re-encoder 102 respectively. After the decoder 101 decodes the compressed audio data sent by the sound source S1, it can first send the audio data of the multiple channels to the DAP, and the DAP can process the audio data through a preset algorithm to obtain better results Audio data. Then the processed audio data is sent to the re-encoder 102, and the re-encoder 102 executes the above-mentioned step 403 to realize encoding, and finally realizes the transmission of audio data through the first audio bus L1 (ie, I2S).

In addition, referring to FIG. 11, the audio processor DAP can also be connected to a mixer MIX, and the mixer MIX can mix the audio data that can be mixed in the received audio data to obtain stereo sound and output it.

The audio data transmission method provided by the embodiments of the present application encodes the received audio data of multiple channels, so that the number of audio data channels included in at least one first audio signal after encoding can be greater than the number of rated channels , Which can be greater than the number of channels that the speaker can receive. In the case that the first audio bus L1 is small, more channels of audio data transmission can also be realized, which realizes the transmission of 5.1.2 channel audio data, breaking the concept of traditional signals, and laying the foundation for the realization of stereo terminals Foundation.

FIG. 12 is a flowchart of a method for transmitting audio data provided by an embodiment of the present application. The method can be applied to the audio receiving terminal 20 shown in FIG. 1. Referring to FIG. 1, the audio receiving terminal 20 may pass multiple first audio The bus L1 is connected to the audio sending terminal 10 and is connected to a plurality of speakers 30 through a plurality of second audio buses L2. The number of the second audio buses L2 is greater than the number of the first audio buses L1. As shown in Figure 12, the method may include:

Step 501: Receive multiple first audio signals sent by the audio transmitter through multiple first audio buses

In the embodiment of the present application, each channel of the first audio signal may include at least one channel of audio data, and the number of channels of the audio data included in the at least one channel of the first audio signal is greater than the rated channel number.

Wherein, the rated number of channels may be the number of channels of audio data that can be received by a speaker. Since the number of audio channels that can be received by a speaker is 2, the rated number of channels is 2. Correspondingly, with respect to the related technology, the audio receiving terminal 20 can only receive 6-channel channel data sent by three first audio buses, and the audio receiving terminal 20 provided in the embodiment of the present application can receive more than 6-channel audio sent by three first audio buses. Audio data of the number of channels.

Step 502: According to the decoding method corresponding to the encoding method adopted by the audio sending end, decode the multiple first audio signals to obtain multiple second audio signals corresponding to the multiple second audio buses.

In the embodiment of the present application, the audio receiving end 20 may pre-store a decoding method corresponding to the encoding method adopted by the audio sending end. After the audio receiving terminal 20 receives multiple channels of first audio signals, it can decode the multiple channels of first audio signals according to the pre-stored decoding method to obtain multiple channels of second audio signals, and each channel of the second audio signal after decoding The number of channels of audio data included in the audio signal may be less than or equal to the number of rated channels. Since the number of channels of audio data that can be received by a speaker is 2, the multiple channels of second audio signals can be obtained by decoding, so that the received audio data of multiple channels can be transmitted to the speaker normally, realizing a true sense Multi-channel audio data transmission.

Step 503: Transmit each second audio signal through a corresponding second audio bus to a speaker connected to the second audio bus.

For example, assuming that the audio receiving end 20 decodes the received audio data to obtain four second audio signals, and each second audio signal includes two channels of audio data, the audio receiving end 20 can pass four second audio signals. The audio bus L2 transmits each second audio signal to the speaker 30 connected to it.

In summary, the embodiment of the present application provides a method for transmitting audio data. Since among the multiple channels of first audio signals received by the audio receiving end, the number of audio data channels included in at least one of the first audio signals is greater than the number of rated channels. Therefore, without external audio equipment, the audio receiving end can decode more channels of audio data and transmit it to the speakers to achieve multi-channel playback.

FIG. 13 is a flowchart of another audio data transmission method provided by an embodiment of the present application, and the method may be applied to the audio receiving terminal 20 shown in FIG. 1. As shown in Figure 13, the method may include:

Step 601: Receive multiple first audio signals sent by the audio transmitter through multiple first audio buses

In the embodiment of the present application, the audio receiving terminal 20 may receive multiple first audio signals through multiple first audio buses L1. Moreover, each channel of the first audio signal may include at least one channel of audio data, and the number of channels of the audio data included in the at least one channel of the first audio signal is greater than the rated channel number.

In some embodiments, it is assumed that, as shown in Fig. 1, the audio sending end 10 is connected to the audio receiving end 20 through three first audio buses L1, that is, there are three first audio signals in total. Then, the audio receiving terminal 20 can receive three channels of first audio signals sent by the audio sending terminal 10 through the three first audio buses L1, and each channel of the first audio signals may include 3 channels of audio data.

Step 602: Determine a decoding mode corresponding to the coding mode adopted by the audio sending end.

In the embodiment of the present application, the audio receiving end 20 may pre-store a decoding method corresponding to the encoding method adopted by the audio sending end. After the audio receiving end 20 receives the multiple channels of first audio signals, the decoding mode corresponding to the encoding mode adopted by the audio transmitting end can be determined.

In some embodiments, the decoding mode stored in the audio receiving terminal 20 may be pre-configured according to the encoding mode set by the audio transmitting terminal 10 at the factory. In addition, multiple decoding methods can be pre-configured in the audio receiving terminal 20. Correspondingly, after acquiring multiple channels of first audio signals, the audio receiving terminal 20 can directly decode the multiple channels of first audio signals by using a pre-configured decoding mode. Alternatively, the audio receiving terminal 20 may also receive the encoding mode sent by the audio transmitting terminal 10 in real time during the process of sending the first audio signal, and then determine the corresponding decoding mode according to the encoding mode.

Step 603: According to the sampling bit width of the second audio bus, split and combine audio data of multiple channels included in the multiple first audio signals to obtain multiple second audio signals.

In the embodiment of the present application, the data bit width of the audio data of each channel included in each second audio signal may be the sampling bit width of the second audio bus. The sampling bit width of the second audio bus may be the same as the initial sampling bit width of the first audio bus, and the data bit width of the audio data of the channel. For example, the sampling bit width of the second audio bus may be 16 bits.

In some embodiments, the embodiment of the present application takes the sampling bit width of the second audio bus L2 of 16 bits and the sampling frequency of 48KHZ as an example for description:

In some embodiments, if the audio transmitter 10 encodes audio data of multiple channels, the encoding method is: in the first half of each sampling period, the 16-bit audio data of one ch is combined, and After splitting the 1ch low 8bit audio data, in the second half of each sampling period, combine the 16bit audio data of one ch and the high 8bit audio data of the split 1ch.

The decoding method determined by the audio receiving terminal 20 can be: the audio data of the channel corresponding to the first 16 bits of the first half of each sampling period and the audio data of the channel corresponding to the first 16 bits of the second half of the period Combine into a second audio signal, and combine the audio data of the channel corresponding to the last 8bit of the first half of each sampling period with the audio data of the channel corresponding to the last 8bit of the second half of the period to get 1ch Audio data, and the combined 1ch audio data and any 1ch audio data are combined into a second audio signal, and the any 1ch audio data may also be combined.

For example, referring to Figure 14, it is assumed that the audio data of the channel received by the audio receiving terminal 20 includes three channels of first audio signals, the first two channels of first audio signals include 3ch audio data, and the last channel of first audio signals includes 2ch audio Data, and the audio data of 1ch in the 3ch is the split audio data. Then, the audio receiving end 20 can combine the audio data of the first 16-bit channel in the first half of the sampling period and the audio data of the first half of the sampling period in each channel of the first audio signal according to the decoding mode and the sampling bit width of the second audio bus. The audio data of the first 16bit channels is combined into three second audio signals. In addition, the audio data of the split channels in the first audio signal and the second audio signal are combined to obtain a second audio signal.

In some embodiments, the audio receiving terminal 20 may combine ch0 and ch1 in the first audio signal of the first channel into a second audio signal, and combine ch2 and ch3 in the first audio signal of the second channel into a second audio signal. Audio signal, combining ch4 and ch5 in the third first audio signal into a second audio signal. Combine the low 8bit of ch6 and the high 8bit of ch6 in the first channel of the first audio signal, and combine the low 8bit of ch7 and the high 8bit of ch7 in the second channel of the first audio signal to obtain a second audio signal .

Correspondingly, referring to FIG. 14, that is, a total of four channels of second audio signals are obtained by decoding, and each channel of second audio signals includes 2ch audio data. Assuming that the audio data of ch0 to ch7 are respectively the main channel audio data, surround channel audio data, sky sound channel audio data, center sound audio data and bass audio data, the main channel, surround channel, and sky can be restored Audio channel data, center sound data, and bass data.

In some embodiments, if the audio sending end 10 encodes audio data of multiple channels, the encoding method is: a combination of two 1ch 16-bit audio data in the first half of each sampling period, And two 1ch 16bit audio data are combined in the second half of each sampling period. Then, the decoding method determined by the audio receiving terminal 20 can be: Combine two 1ch 16bit audio data in the first half of each sampling period into a second audio signal; 2 1ch 16bit audio data in the second half period The audio data is combined into a second audio signal.

In some embodiments, as shown in FIG. 15, it is assumed that the audio data of the channel received by the audio receiving terminal 20 includes three first audio signals, and each first audio signal includes 4ch audio data. Referring to FIG. 15, the audio receiving terminal 20 may combine the 12ch audio data included in the three channels of first audio signals in sequence to form one channel of second audio signals in a decoding manner.

In some embodiments, the audio receiving terminal 20 may combine ch0 and ch1 into a second audio signal, combine ch2 and ch3 into a second audio signal, combine ch4 and ch5 into a second audio signal, and combine ch6 and ch3 into a second audio signal. ch7 is combined into a second audio signal, ch8 and ch9 are combined into a second audio signal, and ch110 and ch11 are combined into a second audio signal. Correspondingly, referring to FIG. 15, a total of six channels of second audio signals are obtained by decoding, and each channel of second audio signals includes 2ch audio data.

It should be noted that the audio receiving terminal 20 may decode the multiple channels of first audio signals in the process of receiving multiple channels of first audio signals, that is, receive and disassemble the multiple channels. Alternatively, the audio receiving terminal 20 may decode the multiple channels of first audio signals after receiving the multiple channels of first audio signals, that is, disassemble them after receiving them.

It should also be noted that I2S includes single CLK control, that is, multiple first audio buses L1 share one CLK control; I2S also includes multiple CLK control, that is, each first audio bus L1 is controlled by one CLK respectively. For I2S controlled by a single CLK, the decoding method is preferentially used for decoding while receiving and dismantling; for I2S controlled by multiple CLKs, the decoding method is preferentially used for receiving and dismantling.

For the decoding method of receiving and disassembling, the audio receiving terminal 20 can buffer the received multiple channels of first audio signals into its internal buffer, and after waiting for the completion of the multiple channels of first audio signal transmission, the audio receiving terminal 20 can initialize the acquisition The first bit of the first audio signal is used as a valid signal, and then the decoding method shown in Figure 12 or Figure 13 is executed in sequence.

For the audio receiving terminal 20, it can also decode the received audio data of the channel by means of double-edge sampling. Referring to FIG. 16, if the audio receiving terminal 20 receives three channels of first audio signals, each channel of the first audio signals includes 4ch audio data. Referring to FIG. 16, the audio receiving terminal 20 can use a double-edge sampling method (that is, collecting audio data on both the rising and falling edges of BCLK) to decode the three received first audio signals to obtain six second audio signals .

It should be noted that the embodiment of the present application does not limit the splitting and combining manner of the audio receiving end 20 either.

Step 604: Transmit each second audio signal through a corresponding second audio bus to a speaker connected to the second audio bus.

In the embodiment of the present application, after the audio receiving terminal 20 obtains multiple channels of second audio signals through decoding, the multiple channels of second audio signals can be transmitted to the speaker 30 through the second audio bus L2 to achieve a multi-channel sound effect. In some embodiments, the audio receiving terminal 20 may store the decoded multiple second audio signals on the multiple second audio buses L1, and finally, the multiple second audio buses L2 may be adjusted to convert the decoded multiple The second audio signal is simultaneously transmitted to the speaker 30.

In some embodiments, it is assumed that as shown in FIG. 15, after the audio receiving end 20 decodes the received audio data of multiple channels, a total of six channels of second audio signals are obtained. Then, the audio receiving terminal 20 can simultaneously transmit each channel of second audio signals to each speaker 30 through the corresponding six second audio buses L2.

FIG. 17 is a flowchart of a method for transmitting audio data provided by an embodiment of the present application. The method can be applied to the implementation environment shown in FIG. 1. As shown in Figure 17, the method may include:

Step 701: Acquire audio data of multiple channels.

For the foregoing acquisition process, reference may be made to step 401, which is not described in detail in the embodiment of the present application.

Step 702: According to the threshold of the number of audio channels of the audio data that can be transmitted by the first audio bus in each sampling period, encode the audio data of the multiple channels to obtain the multiple channels corresponding to the multiple first audio buses. The first audio signal.

For the foregoing encoding process, reference may be made to step 402 and step 403, which are not described in detail in the embodiment of the present application.

Step 703: Transmit each first audio signal to the audio receiving end through a corresponding first audio bus.

For the foregoing transmission process, reference may be made to step 404, which is not described in detail in the embodiment of the present application.

Step 704: Receive multiple first audio signals sent by the audio sending end through multiple first audio buses.

For the foregoing receiving process, reference may be made to step 601, which is not described in detail in the embodiment of the present application.

Step 705: According to the sampling bit width of the second audio bus, split and combine audio data of multiple channels included in the multiple first audio signals to obtain multiple second audio signals.

For the foregoing decoding process, reference may be made to

steps

602 and 603, which are not repeated in this embodiment of the present application.

Step 706: Transmit each second audio signal through a corresponding second audio bus to the speaker connected to the second audio bus.

For the foregoing transmission process, reference may be made to step 604, which is not described in detail in this embodiment of the present application.

The following is an introduction to the overall data processing flow of encoding and decoding methods:

Fig. 18 is a data processing flowchart provided by an embodiment of the present application. With reference to Figure 18, it can be seen that the sampling bit width of the audio transmitting terminal 10 is 24bit and the sampling frequency is 48KHZ; the sampling bit width of the audio receiving terminal 20 is 16bit and the sampling frequency is 48KHZ, and the audio transmitting terminal 10 and the audio receiving The sampling mode of the terminal 20 is single-edge sampling (that is, sampling is performed only on the rising edge of BCLK). Therefore, it can be seen that the threshold of the number of channels of the first audio bus L1 is 3.

Correspondingly, referring to FIG. 18, the audio sending end 10 may first store the decoded 8ch audio data in the buffer, and then use a preset algorithm to determine the 8ch according to its channel number threshold of 3 and the sampling bit width of 24bit. The audio data of the channel is encoded to obtain three first audio signals, and the three first audio signals are transmitted to the audio receiving terminal 20 through the three first audio buses L1. The audio receiving terminal 20 can decode the three first audio signals to obtain a total of four second audio signals according to the sampling bit width of 16 bits, and each second audio signal includes 2ch audio data. Finally, the audio receiving terminal 20 can transmit the four second audio signals to the four AMP40 through the corresponding four second audio buses L2 to realize eight-channel audio data transmission.

Fig. 19 is another data processing flowchart provided by an embodiment of the present application. With reference to Figure 19, it can be seen that the sampling bit width of the audio sending end 10 and the audio receiving end 20 are both 16 bits, the sampling frequency is both 48KHZ, and the sampling method of the audio sending end 10 is double-edge sampling (that is, at the rising of BCLK Both edge and falling edge are sampled), the sampling mode of the audio receiving terminal 20 is single-edge sampling. Therefore, it can be seen that the threshold of the number of channels of the first audio bus L1 is 4.

Correspondingly, referring to FIG. 19, the audio sending end 10 stores the decoded 12ch audio data in the buffer Buffer, and then uses a preset algorithm to encode the 8ch audio data to obtain three channels of first audio The three first audio signals are transmitted to the audio receiving terminal 20 through the three first audio buses L1, and each of the first audio signals includes 4ch audio data. The audio receiving terminal 20 decodes the three first audio signals according to the sampling bit width of 16 bits to obtain a total of six second audio signals, and each second audio signal includes 2ch audio data. Finally, the audio receiving terminal 20 can transmit the six second audio signals to the six AMPs 40 through the corresponding six second audio buses L2, so as to realize twelve-channel audio data transmission.

It should be noted that the sequence of the steps of the audio data transmission method provided in the embodiments of the present application can be adjusted appropriately, and the steps can also be increased or decreased according to the situation. Any person familiar with the technical field can easily think of a method of change within the technical scope disclosed in this application, which should be covered by the protection scope of the application, and therefore will not be repeated.

In summary, the embodiment of the present application provides a method for transmitting audio data. Since the audio sending end decodes the acquired audio data of the multiple channels, the number of audio data channels included in at least one of the obtained multiple first audio signals is greater than the rated number of channels. And because the audio receiving end can decode the received multiple channels of first audio signals to obtain multiple channels of audio signals, and the number of audio data channels included in each channel of the second audio signal is less than or equal to the rated channel number. Therefore, there is no need for an external speaker, which can realize the transmission of more channel audio data, and then realize the multi-channel playback effect.

FIG. 20 is a block diagram of an audio data transmission device provided by an embodiment of the present application. The device may be applied to the audio sending end 10 shown in FIG. 1. Referring to FIG. 1, the audio sending end 10 may pass multiple first audio The bus L1 is connected to the audio receiving terminal 20. Referring to FIG. 20, the device may include:

The acquisition circuit 801 is used to acquire audio data of multiple channels, and the audio data of each channel has the same data bit width.

The encoding circuit 802 is used to encode audio data of multiple channels to obtain multiple first audio signals corresponding to multiple first audio buses one-to-one, wherein each of the first audio signals includes at least one channel Audio data, and the number of channels of audio data included in at least one first audio signal is greater than the number of rated channels.

The first audio signal transmission circuit 803 is configured to transmit each channel of the first audio signal to the audio receiving end through a corresponding first audio bus.

In some embodiments, the encoding circuit 802 may be used to encode audio data of multiple channels according to the threshold of the number of channels of audio data that can be transmitted by the first audio bus in each sampling period, to obtain the Multiple first audio signals corresponding to one first audio bus.

Wherein, the number of audio channels of the audio data included in each channel of the first audio signal is less than or equal to the channel number threshold, and the channel number threshold is determined according to the data bit width and the sampling parameters of the first audio bus.

In some embodiments, the sampling parameters may include: sampling bit width, sampling frequency, and sampling mode. The sampling mode may include single-edge sampling or dual-edge sampling. The channel number threshold may be equal to the rated channel number, the first ratio, and the second The product of the ratio and the sampling coefficient.

Wherein, the first ratio is the ratio of the sampling bit width to the data bit width, the second ratio is the ratio of the sampling frequency to the rated frequency, and the first ratio and the second ratio are both greater than or equal to 1. If the sampling mode is single-edge sampling, the sampling coefficient is 1, and if the sampling mode is double-edge sampling, the sampling coefficient is 2.

In some embodiments, the sampling parameter may include: sampling bit width. Correspondingly, the encoding circuit 802 can be used to: if the sampling bit width is a non-integer multiple of the data bit width, according to the sampling bit width, the audio data of the target channel is split, and the split audio data are respectively The audio data of other channels are combined, and the bit width of the combined audio data is the sampling bit width. If the sampling bit width is an integer multiple of the data bit width, the audio data of at least two channels are combined, and the bit width of the combined audio data is the sampling bit width.

In some embodiments, in the embodiments of the present application, audio data of multiple channels may include: left channel audio data, right channel audio data, left surround channel audio data, right surround channel audio data, left Sky channel audio data, right sky channel audio data, center channel audio data, and subwoofer channel audio data. The audio data of the target channel may include at least one of center channel audio data and subwoofer channel audio data.

In summary, the embodiment of the present application provides an audio data transmission device. Since the encoding circuit decodes the acquired audio data of multiple channels, the number of audio data channels included in at least one of the obtained multiple first audio signals is greater than the number of rated channels. Therefore, without external audio equipment, more channels of audio data can be transmitted to the audio receiving end through the first audio signal transmission circuit, so that the audio receiving end can transmit more channels of audio data to the speaker, realizing multi-channel audio Play effect.

Regarding the audio data transmission device in the foregoing embodiment, the specific manner in which each circuit performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

FIG. 21 is a block diagram of an audio data transmission device provided by an embodiment of the present application. The device may be applied to the audio receiving terminal 20 shown in FIG. 1. Referring to FIG. 1, the audio receiving terminal may pass through multiple first audio buses. L1 is connected to the audio sending end 10 and connected to a plurality of speakers 30 through a plurality of second audio buses L2, and the number of the second audio buses L2 is greater than the number of the first audio buses L1. Referring to FIG. 21, the device may include:

The receiving circuit 901 is configured to receive multiple first audio signals sent by the audio sending end through multiple first audio buses, wherein each first audio signal includes at least one channel of audio data, and at least one first audio signal includes The number of channels of audio data is greater than the number of rated channels.

The decoding circuit 902 is configured to decode the multiple channels of first audio signals according to the decoding method corresponding to the encoding method adopted by the audio sending end to obtain multiple channels of second audio signals corresponding to multiple second audio buses one-to-one, The number of audio data channels included in each second audio signal is less than or equal to the rated number of channels.

The second audio signal transmission circuit 903 is configured to transmit each second audio signal to a speaker connected to the second audio bus through a corresponding second audio bus.

In some embodiments, the decoding circuit 902 may be used to: according to the sampling bit width of the second audio bus, split and combine audio data of multiple channels included in the multiple first audio signals to obtain multiple second audio data. audio signal. The data bit width of the audio data of each channel included in each second audio signal is the sampling bit width of the second audio bus.

In some embodiments, the decoding circuit 902 may be used to decode multiple channels of first audio signals in the process of receiving multiple channels of first audio signals. Or, when the multiple channels of first audio signals are received, the multiple channels of first audio signals are decoded.

In summary, the embodiment of the present application provides an audio data transmission device. Since among the multiple channels of first audio signals received by the decoding circuit, at least one channel of the first audio signal includes audio data channels greater than the rated channel number. Therefore, without external audio equipment, the decoding circuit can decode the audio data of more channels and transmit it to the speakers to achieve multi-channel playback.

FIG. 22 is a schematic structural diagram of a playback device provided by an embodiment of the present application. The playback device 00 may include: an audio transmitting terminal 10 and an audio receiving terminal 20 (not shown in FIG. 22).

Wherein, the audio sending end 10 may include an audio data transmission device as shown in FIG. 20. The audio receiving terminal 20 may include an audio data transmission device as shown in FIG. 21. In addition, referring to FIG. 22, the playback device 00 may further include multiple speakers 30, and the speakers 30 that emit audio data of different channels may be arranged at different positions of the playback device 00.

For example, referring to FIG. 22, it shows that the playback device 00 includes 8 speakers 30. The 8 speakers 30 can respectively emit left channel audio data, right channel audio data, left surround channel audio data, and right surround sound. Channel audio data, left sky channel audio data, right sky channel audio data, center channel audio data and subwoofer channel audio data. Among them, the two speakers 30 that emit left-channel audio data and right-channel audio data may be relatively disposed on the left and right sides of the playback device 00. Two speakers 30 that emit left sky channel audio data and right sky channel audio data may be respectively arranged on the top of the playback device 30. Three speakers 30 that emit left surround channel audio data, right surround channel audio data, and subwoofer channel data may be respectively arranged at the bottom position of the playback device 30. In addition, a speaker 30 that emits audio data of the center sound channel may be arranged in the middle of the playback device 30.

FIG. 23 is a schematic diagram of a display device provided in Embodiment 1 of the present application. Referring to FIG. 23, the present application also provides a display device, which at least includes: a display screen 91 configured to present image data; and a speaker 92 configured to reproduce sound data .

In some implementation examples, the display device may further include: a backlight assembly 94 located below the display screen 91. Usually some optical components are used to supply sufficient brightness and uniformly distributed light sources so that the display screen 91 can display images normally. In some related technologies, the backlight assembly may include an LED light bar or a light panel that automatically emits light.

In some embodiments, the display device may further include: a back plate 95. Usually, the back plate 95 is stamped to form some convex structures, and components such as speakers 92 are fixed on the convex structures by screws or hooks.

In some embodiments, the display device may further include: a rear case 98 covering the back of the display screen 91 to hide components of the display device such as the backlight assembly 94, the speaker 92, etc., to achieve a beautiful effect.

In some embodiments, the display device may further include: a main board 96 and a power supply board 97, which may be arranged as two boards independently, or may be combined on one board.

In some embodiments, the display device further includes a remote control 93.

FIG. 24 is a block diagram of the hardware configuration of the display device provided in Embodiment 1 of the present application. As shown in 20, the display device 200 may include a tuner and demodulator 220, a communicator 230, a detector 240, an external device interface 250, a controller 210, a memory 290, a user input interface, a video processor 260-1, and audio processing. 260-2, display screen 280, audio input interface 272, power supply.

The tuner and demodulator 220, which receives broadcast and television signals through wired or wireless means, can perform modulation and demodulation processing such as amplification, mixing and resonance, and is used to demodulate the television channel selected by the user from multiple wireless or cable broadcast and television signals The audio and video signals carried in the frequency, and additional information (such as EPG data signals).

The tuner and demodulator 220 can be selected by the user and controlled by the controller 210 to respond to the TV channel frequency selected by the user and the TV signal carried by the frequency.

The tuner and demodulator 220 can receive signals in many ways according to different TV signal broadcasting systems, such as terrestrial broadcasting, cable broadcasting, satellite broadcasting, or Internet broadcasting; and according to different modulation types, it can be digital modulation or alternatively. Analog modulation method; and according to different types of received TV signals, analog and digital signals can be demodulated.

In some other exemplary embodiments, the tuner demodulator 220 may also be in an external device, such as an external set-top box. In this way, the set-top box outputs TV audio and video signals through modulation and demodulation, and inputs them to the display device 200 through the input/output interface 250.

The communicator 230 is a component for communicating with external devices or external servers according to various communication protocol types. For example, the communicator 230 may include a WIFI module 231, a Bluetooth communication protocol module 232, a wired Ethernet communication protocol module 233 and other network communication protocol modules or near field communication protocol modules.

The display apparatus 200 may establish a connection between a control signal and a data signal with an external control device or content providing device through the communicator 230. For example, the communicator may receive the control signal of the remote controller 100 according to the control of the controller.

The detector 240 is a component of the display device 200 for collecting signals from the external environment or interacting with the outside. The detector 240 may include a light receiver 242, a sensor used to collect the intensity of ambient light, which can adaptively display parameter changes by collecting ambient light, etc.; it may also include an image collector 241, such as a camera, a camera, etc., which can be used to collect external Environmental scenes, as well as gestures used to collect user attributes or interact with users, can adaptively change display parameters, and can also recognize user gestures to achieve the function of interaction with users.

In some other exemplary embodiments, the detector 240 may further include a temperature sensor. For example, by sensing the ambient temperature, the display device 200 may adaptively adjust the display color temperature of the image.

In some embodiments, when the temperature is relatively high, the color temperature of the display device 200 can be adjusted to be colder; when the temperature is relatively low, the color temperature of the display device 200 can be adjusted to be warmer.

In some other exemplary embodiments, the detector 240 may also include a sound collector, such as a microphone, which may be used to receive the user's voice, including the voice signal of the user's control instruction for controlling the display device 200, or to collect environmental sound for Recognizing the environmental scene type, the display device 200 can adapt to the environmental noise.

The external device interface 250 provides a component for the controller 210 to control data transmission between the display device 200 and other external devices. The external device interface can be connected to external devices such as set-top boxes, game devices, notebook computers, etc. in a wired/wireless manner, and can receive external devices such as video signals (such as moving images), audio signals (such as music), and additional information (such as EPG). ) And other data.

Among them, the external device interface 250 may include: a high-definition multimedia interface (HDMI) terminal 251, a composite video blanking synchronization (CVBS) terminal 252, an analog or digital component terminal 253, a universal serial bus (USB) terminal 254, red, green, and blue ( RGB) terminal (not shown in the figure) and any one or more.

The controller 210 controls the operation of the display device 200 and responds to user operations by running various software control programs (such as an operating system and various application programs) stored on the memory 290.

As shown in FIG. 24, the controller 210 includes a random access memory RAM 213, a read only memory ROM 214, a graphics processor 216, a CPU processor 212, a communication interface 218, and a communication bus. Among them, RAM213 and ROM214, graphics processor 216, CPU processor 212, and communication interface 218 are connected by a bus.

ROM213, used to store various system startup instructions. For example, when the power-on signal is received, the power of the display device 200 starts to start, and the CPU processor 212 runs the system start-up instruction in the ROM, and copies the operating system stored in the memory 290 to the RAM 214 to start the operating system. After the operating system is started up, the CPU processor 212 copies various application programs in the memory 290 to the RAM 214, and then starts to run and start various application programs.

The graphics processor 216 is used to generate various graphics objects, such as icons, operation menus, and user input instructions to display graphics. Including an arithmetic unit, which performs operations by receiving various interactive commands input by the user, and displays various objects according to display attributes. As well as including a renderer, various objects obtained based on the arithmetic unit are generated, and the rendering result is displayed on the display screen 280.

The CPU processor 212 is configured to execute operating system and application program instructions stored in the memory 290. And according to receiving various interactive instructions input from the outside, to execute various applications, data and content, so as to finally display and play various audio and video content.

In some exemplary embodiments, the CPU processor 212 may include multiple processors. The multiple processors may include one main processor and multiple or one sub-processors. The main processor is used to perform some operations of the display device 200 in the pre-power-on mode, and/or to display images in the normal mode. Multiple or one sub-processor, used to perform an operation in the standby mode and other states.

The communication interface may include the first interface 218-1 to the nth interface 218-n. These interfaces may be network interfaces connected to external devices via a network.

The controller 210 may control the overall operation of the display device 200. For example, in response to receiving a user command for selecting a UI object to be displayed on the display screen 280, the controller 210 may perform an operation related to the object selected by the user command.

Wherein, the object may be any one of the selectable objects, such as a hyperlink or an icon. Operations related to the selected object, for example: display operations connected to hyperlink pages, documents, images, etc., or perform operations corresponding to the icon. The user command for selecting the UI object may be a command input through various input devices (for example, a mouse, a keyboard, a touch pad, etc.) connected to the display device 200 or a voice command corresponding to a voice spoken by the user.

The memory 290 includes storing various software modules used to drive and control the display device 200. For example, various software modules stored in the memory 290 include: a basic module, a detection module, a communication module, a display control module, a browser module, and various service modules.

Among them, the basic module is the underlying software module used for signal communication between various hardware in the display device 200 and sending processing and control signals to the upper module. The detection module is a management module used to collect various information from various sensors or user input interfaces, and perform digital-to-analog conversion and analysis management.

For example: the voice recognition module includes a voice analysis module and a voice command database module. The display control module is a module for controlling the display screen 280 to display image content, and can be used to play information such as multimedia image content and UI interfaces. The communication module is a module used for control and data communication with external devices. The browser module is a module used to perform data communication between browsing servers. The service module is a module used to provide various services and various applications.

At the same time, the memory 290 is also used to store and receive external data and user data, images of various items in various user interfaces, and visual effect diagrams of focus objects.

The user input interface 276 is used to send a user's input signal to the controller 210, or to transmit a signal output from the controller to the user. In some embodiments, the control device (for example, a mobile terminal or a remote control) can send input signals input by the user, such as a power switch signal, a channel selection signal, and a volume adjustment signal, to the user input interface, and then the user input interface 276 forwards it to the user input interface. Controller; or, the control device may receive output signals such as audio, video or data output from the user input interface processed by the controller, and display the received output signal or output the received output signal as audio or vibration.

In some embodiments, the user may input a user command on a graphical user interface (GUI) displayed on the display screen 280, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, the user can input a user command by inputting a specific sound or gesture, and the user input interface recognizes the sound or gesture through the sensor to receive the user input command.

The video processor 260-1 is used to receive video signals, and perform video data processing such as decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis according to the standard codec protocol of the input signal. The video signal directly displayed or played on the display screen 280.

In some embodiments, the video processor 260-1 includes a demultiplexing module, a video decoding module, an image synthesis module, a frame rate conversion module, a display formatting module, and the like.

Among them, the demultiplexing module is used to demultiplex the input audio and video data stream. For example, if MPEG-2 is input, the demultiplexing module will demultiplex into a video signal and an audio signal.

The video decoding module is used to process the demultiplexed video signal, including decoding and scaling.

An image synthesis module, such as an image synthesizer, is used to superimpose and mix the GUI signal generated by the graphics generator with the zoomed video image according to user input or itself to generate an image signal for display.

Frame rate conversion module, used to convert the frame rate of the input video, such as converting the frame rate of the input 24Hz, 25Hz, 30Hz, 60Hz video to the frame rate of 60Hz, 120Hz or 240Hz, where the input frame rate can be compared with the source The video stream is related, and the output frame rate can be related to the update rate of the display. The input has a usual format, such as frame insertion.

The display formatting module is used to change the signal output by the frame rate conversion module into a signal that conforms to a display format such as a display, such as format conversion of the signal output by the frame rate conversion module to output RGB data signals.

The display screen 280 is used to receive image signals input from the video processor 260-1, to display video content and images, and a menu control interface. The display screen 280 includes a display screen component for presenting a picture and a driving component for driving image display. The displayed video content can be from the video in the broadcast signal received by the tuner and demodulator 220, or from the video content input by the communicator or the external device interface. The display screen 280 simultaneously displays a user manipulation interface UI generated in the display device 200 and used for controlling the display device 200.

And, depending on the type of the display screen 280, a driving component for driving the display is also included. Alternatively, if the display screen 280 is a projection display, it may also include a projection device and a projection screen.

The audio processor 260-2 is used to receive audio signals, and perform decompression and decoding according to the standard codec protocol of the input signal, as well as audio data processing such as noise reduction, digital-to-analog conversion, and amplification processing, and the result can be in the speaker 272 The audio signal to be played.

The audio output interface 270 is used to receive the audio signal output by the audio processor 260-2 under the control of the controller 210. The audio output interface may include a speaker 272 or output to an external audio output terminal 274 of a generator of an external device, such as : External audio terminal or headphone output terminal, etc.

In some other exemplary embodiments, the video processor 260-1 may include one or more chips. The audio processor 260-2 may also include one or more chips.

And, in some other exemplary embodiments, the video processor 260-1 and the audio processor 260-2 may be separate chips, or they may be integrated with the controller 210 in one or more chips.

The power supply 275 is used to provide power supply support for the display device 200 with power input from an external power supply under the control of the controller 210. The power supply 275 may include a built-in power circuit installed inside the display device 200, or may be a power supply installed outside the display device 200, such as a power interface for providing an external power supply in the display device 200.

This application provides a display device, including:

The display screen is configured to present an image screen;

The speaker is configured to reproduce sound;

An audio processor configured to obtain audio data of multiple channels;

The application also provides a display device, including:

The display screen is configured to present an image screen;

The speaker is configured to reproduce sound;

Transmitting each channel of the second audio signal to the speaker.

The specific implementation manner is introduced with reference to the foregoing embodiment, and details are not described herein again.

The embodiment of the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium. When the computer-readable storage medium runs on a computer, the computer can execute the steps shown in FIG. 1 or FIG. 4 The audio data transmission method shown in Figure 12 or Figure 13 is executed.

The embodiment of the present application provides a mobile terminal, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it can be implemented as shown in Figure 1 or Figure 4 The audio data transmission method shown, and the audio data transmission method shown in FIG. 12 or and FIG. 13 are realized.

Those skilled in the art can clearly understand that, for the convenience and conciseness of the description, the specific working process of the audio data transmission device and playback device described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here. .

The above are only examples of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application. Inside.

Claims

An audio data transmission method, characterized in that it is applied to an audio sending end, the audio sending end is connected to an audio receiving end through a plurality of first audio buses, and the method includes:

Acquire audio data of multiple channels, and the audio data of each channel has the same data bit width;

Encoding the audio data of the multiple channels to obtain multiple first audio signals corresponding to the multiple first audio buses, wherein each of the first audio signals includes at least one channel of audio data, And the number of audio data channels included in at least one of the first audio signals is greater than the rated number of channels;

Each channel of the first audio signal is transmitted to the audio receiving end through a corresponding one of the first audio bus.
The method according to claim 1, wherein said encoding audio data of said multiple channels comprises:

According to the threshold value of the number of audio channels of the audio data that can be transmitted by the first audio bus in each sampling period, the audio data of the multiple channels are encoded to obtain multiple audio data corresponding to the multiple first audio buses. First audio signal;

Wherein, the number of audio channels of the audio data included in each channel of the first audio signal is less than or equal to the threshold of the number of channels, and the threshold of the number of channels is based on the data bit width and the sampling parameters of the first audio bus determine.
The method according to claim 2, wherein the sampling parameters include: sampling bit width, sampling frequency, and sampling mode, and the sampling mode includes single-edge sampling or dual-edge sampling;

The threshold of the number of channels is equal to a product of the rated number of channels and at least one of the first ratio, the second ratio, and the sampling coefficient;

Wherein, the first ratio is the ratio of the sampling bit width to the data bit width, the second ratio is the ratio of the sampling frequency to the rated frequency, and the first ratio and the second ratio are Both are greater than or equal to 1; if the sampling mode is single-edge sampling, the sampling coefficient is 1, and if the sampling mode is dual-edge sampling, the sampling coefficient is 2.
The method according to claim 2 or 3, wherein the sampling parameter comprises: a sampling bit width, and the encoding of audio data of the multiple channels comprises:

If the sampling bit width is a non-integer multiple of the data bit width, the audio data of the target channel is split according to the sampling bit width, and the split audio data is separated from the audio data of other channels. The data is combined, and the bit width of the combined audio data is the sampling bit width;

If the sampling bit width is an integer multiple of the data bit width, the audio data of at least two of the channels are combined, and the bit width of the combined audio data is the sampling bit width.
The method of claim 4, wherein the audio data of the multiple channels comprises: left channel audio data, right channel audio data, left surround channel audio data, right surround channel audio data, Left sky channel audio data, right sky channel audio data, center sound channel audio data and subwoofer channel audio data;

The audio data of the target channel includes: at least one of the center sound channel audio data and the subwoofer channel audio data.
An audio data transmission method, characterized in that it is applied to an audio receiving end, the audio receiving end is connected to an audio sending end through multiple first audio buses, and is connected to multiple speakers through multiple second audio buses, The number of the second audio buses is greater than the number of the first audio buses, and the method includes:

Receiving multiple channels of first audio signals sent by the audio sending end through the multiple first audio buses, wherein each channel of the first audio signal includes at least one channel of audio data, and at least one channel of the first audio signal The number of channels of audio data included in the signal is greater than the number of rated channels;

According to the decoding method corresponding to the encoding method adopted by the audio sending end, the multiple channels of first audio signals are decoded to obtain multiple channels of second audio signals corresponding to the multiple second audio buses, wherein each The number of channels of audio data included in the second audio signal is less than or equal to the number of rated channels;

Each channel of the second audio signal is transmitted to the speaker connected to the second audio bus through a corresponding one of the second audio bus.
The method according to claim 6, wherein the decoding the multiple channels of first audio signals to obtain multiple channels of second audio signals corresponding to the multiple channels of second audio buses comprises:

Split and combine audio data of multiple channels included in the multiple channels of first audio signals according to the sampling bit width of the second audio bus to obtain the multiple channels of second audio signals;

Wherein, the data bit width of the audio data of each channel included in each channel of the second audio signal is the sampling bit width of the second audio bus.
The method according to claim 6 or 7, wherein said decoding said multiple channels of first audio signals comprises:

In the process of receiving the multiple channels of first audio signals, decode the multiple channels of first audio signals; or, after receiving the multiple channels of first audio signals, perform the decoding on the multiple channels of first audio signals To decode.
An audio data transmission device, characterized in that it is applied to an audio sending end, the audio sending end is connected to an audio receiving end through a plurality of first audio buses, and the device includes:

The acquisition circuit is used to acquire audio data of multiple channels, and the data bit width of the audio data of each channel is the same;

The encoding circuit is used to encode the audio data of the multiple channels to obtain multiple first audio signals corresponding to the multiple first audio buses, wherein each of the first audio signals includes at least one audio Channels of audio data, and the number of channels of audio data included in at least one of the first audio signals is greater than the number of rated channels;

The first audio signal transmission circuit is configured to transmit each channel of the first audio signal to the audio receiving end through a corresponding one of the first audio buses.
An audio data transmission device, characterized in that it is applied to an audio receiving end, the audio receiving end is connected to an audio sending end through multiple first audio buses, and is connected to multiple speakers through multiple second audio buses, The number of the second audio buses is greater than the number of the first audio buses, and the device includes:

The receiving circuit is configured to receive multiple channels of first audio signals sent by the audio sending end via the multiple first audio buses, wherein each channel of the first audio signal includes at least one channel of audio data, and at least one channel of audio data The number of audio channels of the audio data included in the first audio signal is greater than the number of rated channels;

The decoding circuit is used to decode the multiple channels of first audio signals according to the decoding method corresponding to the encoding method adopted by the audio sending end to obtain multiple channels of second audio signals corresponding to the multiple second audio buses. An audio signal, where the number of audio data channels included in each second audio signal is less than or equal to the rated number of channels;

The second audio signal transmission circuit is used to transmit each channel of the second audio signal to a speaker connected to the second audio bus through a corresponding one of the second audio buses.
A display device, characterized by comprising:

The display screen is configured to present an image screen;

The speaker is configured to reproduce sound;

An audio processor configured to obtain audio data of multiple channels;

A controller configured to encode the audio data of the multiple channels to obtain multiple first audio signals;

Wherein each channel of the first audio signal includes at least one channel of audio data, and at least one channel of the first audio signal includes audio data with a number of channels greater than a rated channel number;
11. The display device according to claim 11, wherein the controller is configured to encode the audio data of the multiple channels according to a threshold value of the number of channels of audio data that can be transmitted in each sampling period, Obtain multiple first audio signals;

Wherein, the number of audio channels of the audio data included in each channel of the first audio signal is less than or equal to the threshold of the number of channels.
The display device according to claim 12, wherein the controller is configured to encode the audio data of the plurality of channels according to the threshold value of the number of channels of the audio data that can be transmitted in each sampling period Multiple first audio signals;

Wherein, the number of audio channels of the audio data included in each channel of the first audio signal is less than or equal to the threshold of the number of channels.
The display device according to claim 13, wherein the sampling bit width, sampling frequency and sampling mode, the sampling mode includes single-edge sampling or double-edge sampling;

The threshold of the number of channels is equal to a product of the rated number of channels and at least one of the first ratio, the second ratio, and the sampling coefficient;

Wherein, the first ratio is the ratio of the sampling bit width to the data bit width, the second ratio is the ratio of the sampling frequency to the rated frequency, and the first ratio and the second ratio are Are greater than or equal to 1;

If the sampling mode is single-edge sampling, the sampling coefficient is 1, and if the sampling mode is dual-edge sampling, the sampling coefficient is 2.
The display device according to claim 13, wherein if the sampling bit width is a non-integer multiple of the data bit width, the audio data of the target channel is split according to the sampling bit width, and Combine the split audio data with audio data of other channels, respectively, and the bit width of the combined audio data is the sampling bit width;

If the sampling bit width is an integer multiple of the data bit width, the audio data of at least two of the channels are combined, and the bit width of the combined audio data is the sampling bit width.
The display device according to claim 15, wherein the audio data of the multiple channels comprises: left channel audio data, right channel audio data, left surround channel audio data, right surround channel audio data , Left sky channel audio data, right sky channel audio data, center audio channel audio data and subwoofer channel audio data;

The audio data of the target channel includes: at least one of the center sound channel audio data and the subwoofer channel audio data.
A display device, characterized by comprising:

The display screen is configured to present an image screen;

The speaker is configured to reproduce sound;

The audio processor is configured to receive multiple channels of first audio signals, where each channel of the first audio signal includes at least one channel of audio data, and at least one channel of the first audio signal includes audio data More than the number of rated channels;

A controller configured to decode the multiple channels of first audio signals to obtain multiple channels of second audio signals, and transmit them to the speaker;

The number of audio data channels included in each second audio signal is less than or equal to the rated number of channels;

Transmitting each channel of the second audio signal to the speaker.
The display device according to claim 17, wherein the controller is configured to encode the audio data of the multiple channels according to a threshold value of the number of channels of audio data that can be transmitted in each sampling period to obtain Multiple first audio signals;

Wherein, the number of audio channels of the audio data included in each channel of the first audio signal is less than or equal to the threshold of the number of channels.
A playback device, characterized in that the playback device includes: an audio sending end and an audio receiving end;

The audio sending end includes the audio data transmission device as described in right 9;

The audio receiving end includes the audio data transmission device as described in right 10.