CN112218153B

CN112218153B - Display device, acoustic apparatus, and IIS channel interface circuit for multiple data channels

Info

Publication number: CN112218153B
Application number: CN201910630568.4A
Authority: CN
Inventors: 孙学斌; 杨洋
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2021-11-02
Anticipated expiration: 2039-07-12
Also published as: WO2021008134A1; CN112218153A

Abstract

The present disclosure provides a display device, an acoustic apparatus, and a multi-data channel IIS sound channel interface circuit. The IIS sound channel interface circuit of the multiple data channels comprises a sound channel selection end and a plurality of first data ends, wherein the sound channel selection end is connected to the plurality of power amplifiers at the same time, and the sound channel selection end outputs a first sound channel switching signal and a second sound channel switching signal in a time-sharing mode; at least two first data ends of the plurality of first data ends are correspondingly connected to at least two power amplifiers in the plurality of power amplifiers one by one, wherein when the sound channel selection end outputs a first sound channel switching signal, each first data end of the at least two first data ends synchronously outputs a sound channel signal to the corresponding power amplifier; when the sound channel selection end outputs a second sound channel switching signal, each of the at least two first data ends synchronously outputs another sound channel signal to the corresponding power amplifier. The multi-channel transmission method and the multi-channel transmission device achieve the purpose of directly carrying out multi-channel transmission on the power amplifier on the basis of not changing the IIS interface protocol.

Description

Display device, acoustic apparatus, and IIS channel interface circuit for multiple data channels

Technical Field

The present invention relates to the field of display devices, and more particularly, to a display device, an audio device, and a multi-data channel IIS channel interface circuit.

Background

At present, along with the improvement of the requirement of consumers on the sound quality, the adoption of multi-channel audio playing in the television industry gradually becomes a trend. When the multi-channel playing technology is applied, one IIS interface can only transmit two channels due to the limitation of interface types in the conventional IIS interface, and the existing audio signal is already a multi-channel signal after being decoded, so that the conventional single IIS interface cannot support the transmission of the multi-channel signal, and only a plurality of groups of IIS interfaces can be used for transmitting the multi-channel signal, so that the multi-channel signal transmission requires that the number of IIS interfaces on an SOC chip of a display device has a certain requirement, and more IIS interface resources are occupied, and the application of the multi-channel technology in the display device is greatly restricted.

The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

The invention aims to provide a multichannel IIS interface circuit, which aims to realize multichannel transmission of a plurality of power amplifiers directly on the basis of not changing an IIS interface protocol.

In order to solve the technical problems, the invention adopts the following technical scheme:

the present disclosure provides a display device, which includes a main control board, a plurality of power amplifiers, and a speaker connected to the power amplifiers; the main control board is provided with a multi-data channel IIS sound channel interface circuit connected with the power amplifiers; the multiple data channel IIS sound channel interface circuit comprises:

the sound channel selection end is used for being simultaneously connected to the power amplifiers and outputting a first sound channel switching signal and a second sound channel switching signal in a time-sharing mode;

the at least two first data ends of the plurality of first data ends are correspondingly connected to at least two power amplifiers in the plurality of power amplifiers one by one, wherein when the sound channel selection end outputs a first sound channel switching signal, each first data end of the at least two first data ends synchronously outputs a sound channel signal to the corresponding power amplifier; when the sound channel selection end outputs a second sound channel switching signal, each of the at least two first data ends synchronously outputs another sound channel signal to the corresponding power amplifier.

Optionally, the multiple data channel IIS channel interface circuit further includes:

each second data end in the at least one second data end is respectively connected to two power amplifiers in the plurality of power amplifiers, wherein when the sound channel selection end outputs a first sound channel switching signal, each second data end outputs a sound channel signal to a first power amplifier in the two power amplifiers; when the sound channel selection end outputs a second sound channel switching signal, each of the at least two first data ends outputs another sound channel signal to a second power amplifier of the two power amplifiers.

Optionally, two channel signals transmitted by one of the at least two first data ends are a left channel signal and a right channel signal, respectively.

Optionally, when the channel selection end outputs a first channel switching signal, at least two of the first data ends transmit a left channel signal to at least two of the power amplifiers;

when the sound channel selection end outputs a second sound channel switching signal, the at least two first data ends transmit right sound channel signals to the at least two power amplifiers.

Optionally, the two-channel signal transmitted by one of the at least two first data ends corresponds to a left-channel signal and a right-channel signal of a same type of channel signal.

Optionally, the left channel signal and the right channel signal correspond to a left channel signal and a right channel signal; or

The left channel signal and the right channel signal correspond to a left surround channel signal and a right surround channel signal; or

The left channel signal and the right channel signal correspond to a left sky channel signal and a right sky channel signal.

Optionally, one of the at least one second data terminal transmits a subwoofer channel signal to the first power amplifier, and transmits a center tone channel signal to the second power amplifier.

Optionally, the multiple data channel IIS sound channel interface circuit further has a clock end, and the clock end is used for being connected to multiple power amplifiers at the same time.

According to another aspect of the present disclosure, an audio device is provided, which includes a main control board, a plurality of power amplifiers, and a plurality of speakers connected to the power amplifiers; the main control board is provided with a sound channel interface circuit with a multi-channel IIS interface; the multiple data channel IIS sound channel interface circuit comprises:

the at least two first data ends of the plurality of first data ends are correspondingly connected to at least two power amplifiers in the plurality of power amplifiers one by one, wherein when the sound channel selection end outputs a first sound channel switching signal, each first data end of the at least two first data ends synchronously outputs a sound channel signal to the corresponding power amplifier; when the sound channel selection end outputs a second sound channel switching signal, each of the at least two first data ends synchronously outputs another sound channel signal to a corresponding power amplifier;

a plurality of first data ends of the multi-data channel IIS sound channel interface circuit are connected with at least two power amplifiers in a one-to-one correspondence mode, and each power amplifier of the at least two power amplifiers is connected with a loudspeaker so as to amplify and convert a sound channel signal transmitted by the first data ends and transmit the sound channel signal to the loudspeaker.

According to another aspect of the present disclosure, a sound channel interface circuit of a multi-channel IIS interface is provided, where the sound channel interface circuit of the multi-channel IIS interface is a sound channel interface circuit of a multi-channel IIS interface in the above display device.

In the display device provided by the disclosure, the sound channel selection end of the multichannel IIS interface is connected with the sound channel switching end of each power amplifier, and at least two of the first data ends of the multichannel IIS interface are electrically connected with the data input ends of the power amplifiers in a one-to-one correspondence manner, so that each power amplifier can receive the same sound channel switching signal, and each power amplifier can receive two sound channels transmitted by one corresponding data end according to the sound channel switching signal, so that a plurality of sound channels sent by the multichannel IIS interface can be directly received by the plurality of power amplifiers without switching by a multichannel sound card; because the signal transmission mode of the multichannel IIS interface is not changed, the multichannel IIS interface power amplifier directly achieves the aim of multichannel transmission on the power amplifier on the basis that the IIS interface protocol is not changed.

Drawings

FIG. 1 is an exploded view of an embodiment of a display device according to the related art;

fig. 2 is a schematic diagram of distribution positions of speakers corresponding to 8 channels in a 7.1 sound field mode in a display device according to an embodiment of the present disclosure;

FIG. 3 is a block diagram of circuitry on a SOC of an embodiment of the disclosure relating to audio signal processing;

FIG. 4 is a waveform diagram of output signals of respective output terminals of an IIS interface in the related art;

FIG. 5 is a diagram of a relationship between a signal output from a channel selection terminal and a channel signal output from a data terminal of a multi-channel IIS channel interface according to an example of the present disclosure;

FIG. 6 is a diagram illustrating the relationship between the output signal of the channel selection terminal and the output signal of the data terminal of the multi-channel IIS channel interface according to another embodiment of the disclosure;

FIG. 7 is a connection block diagram of the first data terminal and the power amplifier and speaker;

fig. 8 is a connection block diagram of the second data terminal 11 and the power amplifier and the speaker;

FIG. 9 is a circuit connection diagram of a multi-channel IIS audio channel interface and 5 power amplifiers of an example of the present disclosure;

FIG. 10 is a partial circuit diagram of an SOC chip interface circuit;

fig. 11 is a block diagram of the structure of the main modules in the audio component according to the embodiment of the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

In the present disclosure, unless expressly stated or limited otherwise, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be electrically connected or can be communicated with each other; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and that there may be three cases of a alone, B alone, and a and B simultaneously. The symbol "/" generally indicates that the former and latter associated objects are in an "or" relationship. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

First, a structure of a general display device will be described, and as shown in fig. 1, the display device includes a panel 1, a backlight assembly 2, a main board 3, a power board 4, a rear case 5, and a chassis 6. Wherein, the panel 1 is used for presenting pictures for users; the backlight assembly 2 is located below the panel 1, usually some optical assemblies, and is used for supplying sufficient light sources with uniform brightness and distribution, so that the panel 1 can normally display images, the backlight assembly 2 further includes a back plate 201, the main plate 3 and the power supply board 4 are arranged on the back plate 201, usually some convex hull structures are formed by punching on the back plate 201, and the main plate 3 and the power supply board 4 are fixed on the convex hulls through screws or hooks; the rear shell 5 is covered on the panel 1 to hide the parts of the display device such as the backlight assembly 2, the main board 3 and the power panel 4, and the like, thereby achieving the effect of beautiful appearance; the base 6 is for supporting the display device. The mainboard is provided with an SOC chip. The display device usually has a plurality of power amplifiers and a plurality of speakers connected to the power amplifiers. The power amplifier can be connected with an SOC (System on Chip) on the mainboard, the SOC outputs an audio signal to be played to the power amplifier, and the power amplifier amplifies the audio signal to drive the loudspeaker to emit corresponding sound.

Fig. 1 shows only a conventional television with two speakers and two sound channels, while the display device according to the present application includes a plurality of sound channels and a plurality of speakers, and the positions of the speakers in the housing are different according to the sound channels emitted by the speakers. Illustratively, when the display device plays a 5.1.2 sound field mode with 8 channels, fig. 2 shows a schematic diagram of the distribution positions of the speakers corresponding to the 8 channels on the display device 300. L, R, wherein L, R correspond to the speakers of the left channel and the right channel respectively; SL, SR correspond to the loudspeakers of the left surround channel and right surround channel respectively; the FTL and the FTR respectively correspond to the loudspeakers of the left sky sound channel and the right sky sound channel; SW corresponds to the loudspeaker of the bass sound channel; the Center corresponds to a speaker which is a Center-tone channel. Wherein, the FTL and the FTR are correspondingly disposed near the top of the display device 300 in the housing of the display device 300, and the sky sound emitted by the two speakers is reflected by the top of the housing of the display device 300 to form a sky sound effect.

Of course, the speakers may also be disposed outside the housing of the display device 300 and distributed in the space where the housing is located, such as all parts of a room, so as to obtain better stereo effect.

The present dolby standard sound field modes include 5.1 channels, 7.1 channels and 10.1 channels, and the number of the sound field modes is greater than 2, that is, multi-channel transmission is required at the same time. Taking the 7.1 sound field as an example, since one IIS interface can only transmit two channels, when 8 or more channels need to be transmitted, at least 4 conventional IIS interfaces are needed for transmission. However, the SOC of the general display device 300 is rarely capable of simultaneously supporting 4 IIS signal outputs.

An alternative solution is to use a multi-channel IIS interface to interface different power amplifiers. For the multi-channel IIS interface, on one hand, only 8 sound channels can be output at most at the same time, and more sound channels cannot be output; on the other hand, because the conventional power amplifier cannot be connected with the multichannel IIS interface due to the unmatched interfaces, the multichannel IIS interface in the related art can be connected with the power amplifier only by switching the multichannel sound card, so that the multichannel IIS interface cannot be popularized and used.

To solve this problem, the display device 300 proposed by the present disclosure includes a multiple data channel IIS channel interface circuit 100 therein, and the multiple data channel IIS channel interface circuit 100 may be disposed on a main control board of the display device 300. IIS is an abbreviation of Integrated inter Sound, i.e., Integrated audio interface. In one embodiment, the SOC chip on the host board may have the multi-channel IIS channel interface. The IIS sound channel interface mainly transmits three signals, namely a sound channel selection signal, a data signal and a clock signal, and performs data transmission with external equipment according to an IIS bus protocol. The common IIS sound channel interface only has one data transmission end corresponding to the transmission data signal. The multi-channel IIS sound channel interface (also called IIS muiti) of the disclosure has at least two data signal ends, and the multi-channel IIS sound channel interface also supports the IIS protocol, so that the multi-channel IIS sound channel interface has a plurality of sound channels to transmit sound signals according to the different numbers of the data ends, and thus one multi-channel IIS sound channel interface can realize the number of the sound channels required by the 5.1 sound field mode and the 7.1 sound field mode to be output simultaneously.

As shown in fig. 3, the SOC chip has a decoder 120, an audio processing circuit 110 and a multi-data IIS channel interface circuit 100 connected in sequence, the decoder 120 is configured to receive an audio source and decode the audio to form an audio signal; the sound source may be obtained from a network or from a memory on the SOC. The audio processing circuit 110 is used to optimize components in the audio signal to improve sound effects. The multiple data channel IIS channel interface is configured to receive the optimized audio signal from the audio processing circuit 110, and to package and distribute the optimized audio signal into multiple groups of data for output from multiple data channels.

As shown in fig. 4, the signals of the I2S bus interface mainly involved in transmission are as follows:

(1) the serial clock BCLK, i.e., a bit clock, corresponds to each data bit of the digital audio signal, and the frequency of BCLK is 2 × sampling frequency × number of sampling bits. For example, BCLK has a frequency of 2 × 48KHz × 16bit of 1.536 MHz.

(2) And a frame clock WS for switching data of the left and right channels. For example, WS of "1" indicates that data of the left channel is being transmitted, and WS of "0" indicates that data of the right channel is being transmitted. The frequency of WS is equal to the sampling frequency.

(3) Serial data SDATA, audio data represented by two's complement.

Of course, in practical applications, the signals involved in the transmission of the I2S bus interface may also include some relevant signals, such as: the MCLK master clock (i.e. the system clock) is used to better synchronize the systems, and the frequency of MCLK is 256 or 384 times the sampling frequency, for example, 48KHz 256 to 12.288 MHz.

As shown in fig. 1, when the I2S bus interface is transmitting, WS is 0(WS is a low level signal), which indicates that Left Channel (Left Channel) data is being transmitted. WS is 1(WS is a high level signal), and indicates that data of a Right Channel (Right Channel) is being transmitted. That is, an I2S bus interface has two channels for transmitting audio data. Alternatively, WS may be set to 1(WS is a high level signal) to indicate that Left Channel (Left Channel) data is being transmitted. WS is 0(WS is a low level signal), and indicates that data of a Right Channel (Right Channel) is being transmitted. Of course, in practical applications, this needs to be determined according to the practical application environment, and is not limited herein.

As shown in fig. 1, one channel of the I2S bus interface transmits audio data corresponding to the left channel, and the other channel transmits audio data corresponding to the right channel. Also, WS may change at the rising or falling edge of the serial clock BCLK, and the WS signal need not necessarily be symmetrical. Generally, on the slave side, the most significant bit of data always appears at the pulse of the 2 nd bit clock BCLK after the falling edge of the frame clock WS (i.e., the start of a frame). I.e. WS always changes one clock cycle before the most significant bit transfer, which makes it possible for the slave to get time to synchronize with the serial DATA being transferred and for the receiver to store the current command and clear space for the next command.

In the following embodiments, the signal transmission between the multiple data channel IIS channel interface circuit 100 and the power amplifier is taken as an example for illustration. Of course, it is understood that any audio processing device having an IIS channel interface may be suitable for use with the multiple data channel IIS channel interface circuit 100 of the present disclosure. The traditional power amplifier only supports the input of a common IIS sound channel interface. Therefore, the traditional power amplifier is provided with a sound channel switching end, a data input end and a clock receiving end; therefore, one data input end of the power amplifier receives two channels of sound channel signals under the matching of the data input end and the sound channel switching end.

Fig. 5 shows the correspondence between the signal output from the channel selection side WS and the channel signal output from the data side. The multi-data channel IIS channel interface circuit 100 of the present disclosure has a channel selection terminal WS, a plurality of data terminals (corresponding to D0-D3 in FIG. 5), and a bit clock signal terminal BCLK. In the figure, the multi-data channel IIS channel interface circuit 100 has four data terminals (D0 to D3), and the output waveform of the clock terminal is not shown. The channel selecting terminal WS can alternately output a high level and a low level. When the channel selection terminal WS outputs a high level, D0 outputs an S1 channel signal, D1 outputs an S3 channel signal, D2 outputs an S5 channel signal, and D3 outputs an S7 channel signal; when the channel selection terminal WS outputs a low level, D0 outputs an S2 channel signal, D1 outputs an S4 channel signal, D2 outputs an S6 channel signal, and D3 outputs an S8 channel signal. Thereby, the purpose that one channel selection end WS outputs 8 channel signals through 4 output ends in one period is realized.

In the embodiment of the present disclosure, the data terminal is divided into a first data terminal 10 and a second data terminal 11 according to different connection power amplifiers. It should be noted that the multiple data channel IIS channel interface circuit 100 of the present disclosure may have at least one first data terminal 10 and at least one second data terminal 11; or only have a plurality of first data terminals 10 and no second data terminals 11; it is also possible to have only a plurality of second data terminals 11 without the first data terminal 10.

Referring to fig. 7, in an embodiment, the multiple data channel IIS audio channel interface circuit 100 includes an audio channel selecting end WS and a plurality of first data ends 10, the audio channel selecting end WS is configured to be simultaneously connected to a plurality of power amplifiers 20, and the audio channel selecting end WS outputs a first audio channel switching signal and a second audio channel switching signal in a time-sharing manner; at least two first data terminals 10 of the plurality of first data terminals 10 are correspondingly connected to at least two power amplifiers 20 of the plurality of power amplifiers 20 one by one, wherein when the sound channel selection terminal WS outputs the first sound channel switching signal, each first data terminal 10 of the at least two first data terminals 10 synchronously outputs a sound channel signal to the corresponding power amplifier 20, and the power amplifier 20 processes the sound channel signal and then drives the loudspeaker 30 to emit the sound channel signal; when the channel selection end WS outputs the second channel switching signal, each first data end 10 of the at least two first data ends 10 synchronously outputs another channel signal to the corresponding power amplifier 20, and the power amplifier 20 processes the channel signal and drives the speaker 31 to emit the channel signal.

In this embodiment, the first data terminals 10 are connected to the power amplifiers 20 in a one-to-one correspondence manner, that is, two channels of sound channel signals transmitted by one first data terminal 10 are correspondingly transmitted to a data input terminal of one power amplifier 20. The audio channel switching end of the power amplifier 20 is configured to receive a signal from the clock selection end of the multiple data channel IIS audio channel interface circuit 100, and can receive and process an audio channel signal according to the received signal from the clock selection end, and drive a corresponding speaker.

Referring to fig. 9, it is illustrated that the multi-data channel IIS audio interface circuit 100 has three first data terminals 10, the three first data terminals 10 are D0, D1, and D2, respectively, and the D0, D1, and D2 are connected with three power amplifiers 20, which correspond to AMP1, AMP2, and AMP3, respectively, and each power amplifier 20 is connected with two speakers. When the sound channel selection end WS of the multi-data channel IIS sound channel interface circuit 100 outputs high level, the D0 outputs an S1 sound channel signal to a data receiving end of a power amplifier AMP1, and the power amplifier AMP1 receives the S1 sound channel signal, and drives one loudspeaker to emit corresponding sound after amplification, digital-to-analog conversion and other processing; similarly, the D1 transmits the S3 channel signal to the data receiving end of the power amplifier AMP2, and the D2 transmits the S5 channel signal to the data receiving end of the power amplifier AMP 3; when the sound channel selection end WS of the multi-data channel IIS sound channel interface circuit 100 outputs low level, the D0 outputs an S2 sound channel signal to a data receiving end of a power amplifier AMP1, and the power amplifier AMP1 receives the S2 sound channel signal, and drives another loudspeaker to emit corresponding sound after amplification, digital-to-analog conversion and other processing; similarly, the D1 transmits the S4 channel signal to the data receiving end of the power amplifier AMP2, and the D2 transmits the S6 channel signal to the data receiving end of the power amplifier AMP 3.

Referring to fig. 8, further, the multiple data channel IIS audio channel interface circuit 100 may further include at least one second data terminal 11, where each second data terminal 11 of the at least one second data terminal 11 is respectively connected to two power amplifiers 20 of the multiple power amplifiers, where when the audio channel selection terminal WS outputs the first audio channel switching signal, each second data terminal 11 outputs an audio channel signal to a first power amplifier 21 of the two power amplifiers 20, and the first power amplifier 21 processes the audio channel signal and then drives the speaker 32 to emit the audio channel signal; when the channel selection end WS outputs the second channel switching signal, each first data end 10 of the at least two first data ends 10 outputs another channel signal to the second power amplifier 22 of the two power amplifiers 20, and the second power amplifier 22 processes the channel signal and drives the speaker 33 to emit the processed channel signal.

In this embodiment, since the second data terminal 11 is connected to two power amplifiers, each power amplifier can receive only one channel signal transmitted by the second data terminal 11.

Here, it is illustrated that the multiple data channel IIS audio channel interface circuit 100 has a second data terminal 11, which corresponds to D3 in the drawing, and the second data terminal D3 is connected with two power amplifiers, namely AMP4 and AMP 5; each power amplifier 21 is correspondingly connected with a loudspeaker. When the sound channel selection end WS of the multi-data channel IIS sound channel interface circuit 100 outputs high level, the D3 outputs an S7 sound channel signal to a power amplifier AMP4, and the power amplifier AMP4 receives the S7 sound channel signal, and the signal is amplified, converted in a digital-to-analog mode and the like and then is emitted from a loudspeaker connected with the power amplifier; when the channel selection end WS of the multi-data channel IIS channel interface circuit 100 outputs a low level, the D3 outputs an S8 channel signal to the power amplifier AMP5, and the power amplifier AMP5 receives the S2 channel signal, and then sends the signal out from the speaker connected to the power amplifier AMP5 after amplification, digital-to-analog conversion, and the like.

It should be noted that the data side (the first data side 10 and the second data side 11) of the multiple data channel IIS channel interface circuit 100 may be idle. Referring to fig. 10, for example, when a 7.1 sound field mode is transmitted through a multi-channel IIS interface, the multi-channel IIS interface on a certain type of SOC chip has 5 data transmission ports (AOSDATA 0-AOSDATA 4), 1 bit clock port (AOBCK), and 1 system clock port (AOMCLK); one therefore needs only 4 data transfer ports to achieve the 8 channels needed to transfer the 7.1 sound field mode, so there is one data port free in the multi-channel IIS interface. For example, for a haisi 811 platform, the multi-channel IIS interface has 4 data transmission ports, so when transmitting a 7.1 sound field mode, all 4 data transmission ports need to be utilized to realize transmission of 8 sound channels.

The first channel switching signal and the second channel switching signal output by the channel selection end WS of the multiple data channel IIS channel interface circuit 100 may be high level and low level, respectively, or may be electrical signals with other waveforms. When the amplitude of the triangular wave signal is larger than a certain threshold value, a formed signal segment is a first sound channel switching signal, and a formed signal segment smaller than the threshold value is a second sound channel switching signal. Referring to fig. 6, the channel selecting end WS outputs a triangular wave signal, and the triangular wave is symmetrically distributed by a level signal with an amplitude of 0, so that the signal end corresponding to the channel selecting end WS outputting a level signal greater than 0 is the first channel switching signal, and the signal end corresponding to the channel selecting end WS outputting a level signal less than 0 is the second channel switching signal.

In the multi-data-channel IIS sound channel interface circuit 100 provided by the disclosure, the sound channel selection end WS of the multi-channel IIS interface is connected with the sound channel switching end of each power amplifier, and at least two of the first data ends 10 of the multi-channel IIS interface are electrically connected with the data input end of each power amplifier in a one-to-one correspondence manner, so that each power amplifier 20 can receive the same sound channel switching signal, each power amplifier can receive two sound channels transmitted by one corresponding data end according to the sound channel switching signal, and a plurality of sound channels sent by the multi-channel IIS interface can be directly received by the plurality of power amplifiers without being switched by a switching chip; because the signal transmission mode of the multichannel IIS interface is not changed, the multichannel IIS interface transmission method and the multichannel IIS interface transmission device achieve the purpose of directly carrying out multichannel transmission on the power amplifier on the basis of not changing the IIS interface protocol.

In some embodiments, the two-channel signal transmitted by one of the at least two first data terminals 10 is a left-channel signal and a right-channel signal. It will be appreciated that the left channel signal is amplified by the power amplifier 20 and drives the speaker to emit sound appropriate for the human left ear. The right channel signal is amplified by the power amplifier 20 and drives the speaker to emit sound adapted to the hearing of the human right ear.

Further, when the channel selection end WS outputs the first channel switching signal, the at least two first data ends 10 transmit the left channel signal and the at least two power amplifiers 20; when the channel selection end WS outputs the second channel switching signal, the at least two first data ends 10 transmit the right channel signal and the at least two power amplifiers 20.

Specifically, the channel types include a base channel, a surround channel, a sky channel, and the like. The left channel signal corresponds to a left channel, a left surround channel, a left sky channel and the like; accordingly, the right channel signal corresponds to a right channel, a right surround channel, a right sky channel, and the like. When the channel selecting end WS outputs the first channel switching signal, the channels transmitted by the at least two first data ends 10 are a left channel, a left surround channel, a left sky channel, etc. When the channel selection end WS outputs the second channel switching signal, the channels transmitted by the at least two first data ends 10 are a right channel, a right surround channel, a right sky channel, and the like.

The left channel and the right channel are used as basic channels, which means that they can realize sound transmission recognized by human ears without the cooperation of other types of channels, for example, a 2.0 sound field mode only has a left channel and a right channel. When the sky channel is applied to the audio system of the display device 300, the speaker emitting the sky channel is correspondingly disposed near the top of the display device 300 in the housing of the display device 300, and the sky sound emitted from the speaker is reflected by the top of the housing of the display device 300 to form a sky sound effect.

In this embodiment, the two-channel signal transmitted by one first data end 10 of the at least two first data ends 10 corresponds to the left-side channel signal and the right-side channel signal of the same type of channel signal. A left channel signal and a right channel signal corresponding to the same type of channel signal. It should be noted that the types of the channel signals are distinguished by the sound zones generated corresponding to the channel signals. Therefore, the sound ranges generated by the left channel signal and the right channel signal of the same type of channel signal are approximately bilaterally symmetrical so as to correspond to the auditory senses of the left and right ears of a human respectively. The amplification factor required by the same type of sound channel signals and the signal processing process are approximately the same, so that the same type of sound channel signals are processed through the same power amplifier 20, the same type of sound channel signals can have approximately the same amplification gain, and the sound zone obtained after the sound is emitted through the loudspeaker has better left-right symmetry.

In one embodiment, the left channel signal and the right channel signal of the same type of channel signal are left channel signal and right channel signal, or the left channel signal and the right channel signal correspond to left surround channel signal and right surround channel signal, or the left channel signal and the right channel signal correspond to left sky channel signal and right sky channel signal.

In the 7.1 sound field mode, two of the 8 sound channels are the subwoofer sound channel signal and the center sound channel signal, in this embodiment, one second data port 11 of the at least one second data port 11 transmits the subwoofer sound channel signal to the first power amplifier 21, and transmits the center sound channel signal to the second power amplifier 22.

Based on the above embodiment, since the data terminal performs the transmission of the channel signal in a serial transmission manner, the multiple data channel IIS channel interface circuit 100 further has a clock terminal BCLK, i.e., 1 pulse is provided at the clock terminal SCLK corresponding to each bit of the channel signal. In one embodiment, the power amplifier has a clock receiving terminal, and the clock terminal SCLK is provided for being simultaneously connected to the clock receiving terminals of a plurality of power amplifiers, thereby implementing synchronous transmission of the audio channel signals between the multi-data channel IIS audio channel interface circuit 100 and the power amplifiers.

Based on the above embodiments, with the multi-data-channel IIS audio channel interface circuit 100 provided by the present disclosure, only three first data ports 10 and one second data port 11 are needed to realize transmission of 8 audio channels required by the 7.1 sound field mode.

It is understood that as technology develops, more and more sound channels may be included in the sound field pattern to achieve more realistic and rich auditory effects. The current 10.1 sound field mode includes 11 sound channels, and it can be understood that, when a sound field mode with more than 11 sound channels occurs, based on the inventive concept disclosed in the embodiment of the present disclosure, transmission of multiple channels can still be achieved by having a greater number of SOC chips at the IIS interface data end and setting a corresponding number of power amplifiers, so that it can be said that the number of sound channels desired to be transmitted can be achieved based on the inventive concept disclosed in the present disclosure.

The present disclosure also provides an audio device, which includes a main control board, a plurality of power amplifiers, and a plurality of speakers connected to the power amplifiers; a multiple data channel IIS channel interface circuit 100 is provided on the host board. It is understood that the host board has a host chip or other audio processing chip or the like thereon, which may have the multiple data channel IIS channel interface circuit 100 thereon. The multiple data channels IIS audio channel interface circuit 100 has multiple first data terminals 10 connected to at least two power amplifiers 20 in a one-to-one correspondence manner, and at least two power amplifiers are connected to two speakers in a corresponding manner, so that two audio channel signals transmitted by the first data terminals 10 are amplified and subjected to digital-to-analog conversion, and then are respectively transmitted through the two speakers.

Fig. 11 is a block diagram showing the configuration of each main module in the audio device. In the figure, the data end connected with the power amplifier 23 is the first data end 10; the power amplifier 23 is connected with the loudspeaker 34 and the loudspeaker 35, the data end connected with the power amplifier 24 is the second data end 11, and the power amplifier 24 is connected with the loudspeaker 36.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A display device is characterized by comprising a main control board, a plurality of power amplifiers and loudspeakers connected with the power amplifiers; the main control board is provided with a multi-data channel IIS sound channel interface circuit connected with the power amplifiers; the multiple data channel IIS channel interface circuit includes:

the sound channel selection end is connected to the power amplifiers and outputs a first sound channel switching signal and a second sound channel switching signal in a time-sharing mode;

the at least two first data ends of the plurality of first data ends are correspondingly connected to at least two power amplifiers in the plurality of power amplifiers, wherein when the sound channel selection end outputs a first sound channel switching signal, each first data end of the at least two first data ends synchronously outputs a sound channel signal to the corresponding power amplifier; when the sound channel selection end outputs a second sound channel switching signal, each of the at least two first data ends synchronously outputs another sound channel signal to the corresponding power amplifier.

2. The display device of claim 1, wherein the multiple data channel IIS channel interface circuit further comprises:

3. The display device according to claim 1, wherein the two-channel signal transmitted by one of the at least two first data terminals is a left-channel signal and a right-channel signal.

4. The display device according to claim 1, wherein when the channel selection terminal outputs a first channel switching signal, at least two of the first data terminals each transmit a left channel signal to at least two of the power amplifiers;

5. The display apparatus according to claim 1, wherein the two-channel signal transmitted from one of the at least two first data terminals corresponds to a left-side channel signal and a right-side channel signal of the same type of channel signal.

6. The display device according to claim 3, wherein the left channel signal and the right channel signal correspond to a left channel signal and a right channel signal; or

7. The display device of claim 2, wherein one of the at least one second data terminal transmits a subwoofer channel signal to the first power amplifier and a center tone channel signal to the second power amplifier.

8. The display device of claim 1, wherein the multiple data channel IIS channel interface circuit further has a clock terminal for simultaneous connection to a plurality of the power amplifiers.

9. The sound equipment is characterized by comprising a main control board, a plurality of power amplifiers and a plurality of loudspeakers connected with the power amplifiers; the main control board is provided with a plurality of data channel IIS sound channel interface circuits connected with the power amplifiers, and the data channel IIS sound channel interface circuits comprise:

and a plurality of first data ends of the multi-data channel IIS sound channel interface circuit are correspondingly connected with at least two power amplifiers one by one, and each power amplifier in at least two power amplifiers is connected with a loudspeaker so as to amplify, convert digital to analog and transmit sound channel signals transmitted by the first data ends to the loudspeaker.

10. A sound channel interface circuit of a multi-channel IIS interface, wherein the sound channel interface circuit of the multi-channel IIS interface is the sound channel interface circuit of the multi-channel IIS interface in the display device according to any one of claims 1 to 8.