CN1290377C - Wireless sound system that provides voice and data multiplex transmission - Google Patents

Abstract

The invention provides a wireless sound system, which comprises a transmitter and a receiver, wherein each of the transmitter and the receiver comprises a device for providing voice and data multiplexing transmission, so that the wireless sound system can receive a plurality of voice signals of different types, output the voice signals of different types and integrate related control signals into the wireless sound system of the invention so as to be used for users to transmit and receive various analog or digital signals.

Description

Wireless sound system with voice and data multiplex transmission

technical field

The present invention relates to a wireless audio system for providing multiplex transmission of voice and data, in particular to a wireless audio system capable of receiving a plurality of different types of input signals (Input Signal) and outputting a plurality of different types of output signals (Output Signal) Signal) wireless sound system.

Background technique

Sound has always been one of the most basic and intuitive ways for human beings to communicate. For example, voice for exchanging information and pleasant music are all transmitted through sound. Even with today's advanced technology, voice information has never lost its importance. The audio system used to play sound is the focus of research and development by the information industry today. Especially with the development of wireless network technology in recent years, the wireless audio system can transfer the sound signal to the radio for transmission, and then convert it into a sound signal for playback. For example, a wireless Internet radio can transform a home audio system or an in-car audio system into a powerful broadband radio. Users only need to perform simple operations, and countless Internet broadcasts such as music and news will be transmitted to the client for playback.

Please refer to Figure 1. FIG. 1 is a functional block diagram of a conventional wireless audio system 10 . The wireless audio system 10 includes a transmitter (Transmitter) 10A and a receiver (Receiver) 10B; the transmitter 10A can convert the analog voice signal and send it out in the form of radio, and the receiver 10B can receive the signal in the form of radio, then can Play the corresponding analog voice signal. The transmitter 10A is provided with a sound source input device 12, an analog-to-digital conversion circuit 14, a frame unit 16, a modulation module 18, and a transmission circuit 20; the receiver 10B is provided with a receiving circuit 22, a demodulation module 24, and a frame synchronization control unit (Frame Synchronization Controller) 26, digital-to-analog conversion circuit 28 and speaker 29 of pluggable (detachable) installation.

In the transmitter 10A of the known technology, a microphone can be additionally arranged in the sound source input device 12, and the sound source input device 12 can also receive the different voices of two different sound channels (such as the left and right sound channels) respectively, and sample them as Sampling data points in electronic form (the sampling value of each sampling point represents the amplitude of the voice at a certain sampling time point), and then the sampling data points are sent to the analog-to-digital conversion circuit 14 to form a sequence of digital signals P1 , and then the frame unit 16 can add the header (Header) data and the tail (Tail) data including the error protection code to the digital signal P1 to make it into a frame (frame) signal P2, and the frame signal P2 is represented by bit stream (bit stream) to the modulation module 18 of the next stage. The modulation module 18 will modulate the frame signal into an analog baseband signal P3 suitable for wireless transmission, and then output it to the transmission circuit 20, which will be further converted into a high-frequency radio frequency (RF) signal P4 by the transmission circuit 20, and transmitted in the form of radio launch out.

After receiving the radio signal transmitted by the transmitter 10A, the receiver 10B will convert the radio frequency signal P4 into a baseband signal P5 (corresponding to the baseband signal P3 of the original transmitter 10A) by the receiving circuit 22, and output it to the solution The modulation module 24 extracts the digital data stream P6 in the baseband signal, and the digital data stream P6 corresponds to the original frame signal P2 in the transmitter 10A. The frame synchronization control unit 26 analyzes the header data and tail data of the received digital data stream P6, finds the beginning of the frame signal, and confirms the correctness of the frame signal, and converts the received digital data stream P6 into a standard digital voice signal P7, and at the same time control the timing and data synchronization of the output digital voice signal P7, then, the digital-to-analog conversion circuit 28 converts the digital voice signal P7 into an analog voice signal, and at the same time, if the transmission If the sound source input device 12 in the receiver 10A originally received two different analog voices of different channels, the digital-to-analog conversion circuit 28 of the receiver 10B can also re-separate the voice signals originally belonging to different channels, corresponding to the transmission The sound source input device 12 in the receiver 10A originally received the analog voice of two different channels, and finally, the receiver 10B is equipped with a speaker 29, and the voice signal in the analog form can be played out by the speaker, so that the user can hear . And the loudspeaker 29 can be a loudspeaker or an earphone.

The above-mentioned wireless audio system has a wide range of applications, and many of the operating links have been disclosed in many known patents. For example, in the wireless audio system 10 of FIG. 1 , the digital signal P1 before entering the frame unit 16 is Should comply with a pulse-code modulation (PCM) format, the standard format of this pair of audio signals can be found in US Patent No.6,343,217, "Digital cordless telephony with PCM coding" proposed by Borland et al. The known patent also discloses a method of modulating a bit stream signal conforming to a PCM format. The US Patent No. 6,483,857 proposed by Sloan et al., "Method and apparatus for transmitting control information over an audio data stream" explains in more detail how to transmit and modulate a bit stream signal conforming to a pulse code modulation format.

It can be seen from the above known technologies that the output and input interfaces supported by the known wireless audio system technology are only analog voice signals, and users can only use the known architecture to transmit analog voice signals, which will cause the trouble of limited transmission signal quality. Alternatively, if the control data signal can be integrated into the wireless audio system with a small amount of bandwidth, it can truly meet the user's transmission needs that can be flexibly adapted to different occasions.

Contents of the invention

Therefore, the main purpose of the present invention is to provide a voice and data multiplex transmission device and a wireless audio system to receive and output multiple different types of signals, so as to solve the above problems.

The wireless audio system disclosed in the present invention includes a transmitter end and a receiver end, each of which includes a related device for providing voice and data multiplex transmission, so that the wireless audio system of the present invention can be controlled according to the user's preferences. It needs to receive different types of input signals (Input Signal) and can output the same or different types of output signals (Output Signal), and integrate related control signals into the wireless audio system for users to send and receive analog or digital signal.

The object of the present invention is to provide a device for providing voice and data multiplex transmission, which is suitable for a wireless audio system and is used to receive multiple input signals of different types. The multiple input signals are at least Contains an analog audio signal, a first digital audio signal, and a control signal, which includes an analog-to-digital conversion circuit 34 (Analog-to-DigitalConverter), used to convert the analog audio signal (Analog Audio Signal) into an The second digital voice signal; a signal selector 36, electrically connected to the voice analog-to-digital conversion circuit 34, for selecting an output from the first digital voice signal and the second digital voice signal; a digital signal format Converter 38, electrically connected to the signal selector 36, used to convert the first digital voice signal or the second digital voice signal into a pulse code voice signal; and a synthesis module 40 (SynthesizingModule), electrically connected to the digital The signal format converter 38 is used to synthesize the control signal and the pulse code voice signal into a digital signal in bit stream form.

Another object of the present invention is to provide a device for providing voice and data multiplex transmission, suitable for use in a wireless audio system, which receives a digital signal in the form of a bit stream, which includes a separation module for The digital signal in the form of a bit stream is separated into a control signal (Control Signal) and a pulse code voice signal; a digital signal format converter is electrically connected to the separation module for converting the pulse code voice signal into a digital voice signal; a signal judger, electrically connected to the digital signal format converter, for judging the digital voice signal as a first digital voice signal or a second digital voice signal; and a digital-to-analog conversion circuit (Digital- to-Analog Converter), electrically connected to the signal judger, and used to convert the first digital voice signal into an analog voice signal.

Yet another object of the present invention is to provide a wireless audio system that can provide voice and data multiplex transmission, which includes a transmitter (Transmitter) for receiving a plurality of different types of input signals (Input Signal), the multiple An input signal at least includes a first digital voice input signal and a control input signal, and the transmitter includes a selection synthesis device for converting the first digital voice input signal into a signal format and converting the converted digital The voice signal is combined with the control input signal to output a digital input signal in the form of bit stream; A digital input signal modulation in the form of a corresponding baseband signal; and a transmission circuit, electrically connected to the signal modulation module, used to convert the baseband signal into a radio frequency signal and transmit the radio frequency signal to the air; and a Receiver (Receiver), used to receive the radio frequency signal, used to output multiple different types of output signal (Output Signal), the receiver includes a receiving circuit, used to receive the radio frequency signal and generate a corresponding baseband signal ; a signal demodulation module (Demodulation Module), electrically connected to the receiving circuit, used to demodulate the baseband signal into a digital output signal in the form of a bit stream; a separate judgment device, used to have the bit stream The digital output signal of the form is separated into a control output signal and a digital voice output signal; wherein the first digital voice output signal and the control output signal are respectively corresponding to the first digital voice input signal and the control input signal.

Description of drawings

FIG. 1 is a functional block diagram of a known wireless audio system.

FIG. 2 is a functional block diagram of an embodiment of a device of the present invention.

FIG. 3 is a functional block diagram of a transmitter architecture including the embodiment of FIG. 2 .

FIG. 4 is a functional block diagram of another device embodiment of the present invention.

FIG. 5 is a functional block diagram of a receiver architecture including the embodiment of FIG. 4 .

FIG. 6 is a functional block diagram of a preferred embodiment of the wireless audio system of the present invention.

FIG. 7 is a functional block diagram of an embodiment of the wireless audio system of FIG. 6 .

Description of reference symbols

10. 80 wireless audio system

10A, 30, 80A transmitters

10B, 60, 80B receiver

12 audio input devices

14, 34, 84 analog-to-digital conversion circuits

16, 46, 96 frame units

18 modulation modules

20, 50, 100 transmission circuits

22, 72, 102 receiving circuit

24 demodulation modules

26, 66, 116 frame synchronization control unit

28, 78, 118 digital-analog conversion circuit

29 speakers

32, 62, 82, 112 devices

36, 86 signal selector

38, 68, 88, 108 digital signal format converter

40, 90 synthesis modules 42, 92 synthesis units

47, 97 modulation circuit 48, 98 signal modulation module

49, 99 spread spectrum circuit 64, 114 separation module

67, 117 separation unit 70, 110 signal judger

73, 103 despreading circuit 74, 104 signal demodulation module

75, 105 demodulation circuit 81 selection synthesis device

113 Separation judgment device

Detailed ways

Please refer to FIG. 2 . FIG. 2 is a functional block diagram of an embodiment of a device of the present invention. The device 32 of this embodiment can be used to provide voice and data multiplex transmission. The device 32 can receive multiple input signals of different types. In this embodiment, the multiple input signals include an analog audio signal (Analog Audio Signal), a first digital audio signal, and a control signal. In Fig. 2, the device 32 that can be used to provide voice and data multiplex transmission includes an analog-to-digital conversion circuit 34 (Analog-to-Digital Converter), a signal selector 36, a digital signal format converter 38 , and a synthesis module (Synthesizing Module) 40. When the input signal is an analog voice signal, the analog-to-digital conversion circuit 34 will convert the received analog voice signal into a second digital voice signal, and then output it directly when the input signal is a digital voice signal, and the signal selector 36 Electrically connected to the analog-to-digital conversion circuit 34 for selecting one output from the first digital voice signal and the second digital voice signal, and the digital signal format converter 38 is electrically connected to the signal selector 36 for selecting the signal The first digital voice signal or the second digital voice signal output by the device 36 is converted into a pulse code voice signal (PCM). Finally, the synthesis module 40 is electrically connected after the digital signal format converter 38 to convert the received control signal And the pulse code voice signal is synthesized into a digital signal in the form of a bit stream.

Please continue to refer to Fig. 2, the second digital voice signal that the received analog voice signal produces after being converted by the analog-to-digital conversion circuit 34 conforms to a standard digital voice format I2S (Inter-ICSiund). The first digital voice signal must also conform to standard digital voice formats such as I2S, SPDIF (Sony/Philips Digital Interface), etc., and select one of the first digital voice signal and the second digital voice signal through the signal selector 36 After judging the selection, the selected first or second digital voice signal will be sent to the digital signal format converter 38 for further format conversion. Please note that the signal selector 36 can be a multiplexer (Multiplexer) in actual implementation. Or other means 32 with judgment selection mechanism to complete. The pulse code voice signal converted by the digital signal format converter 38 is a digital voice signal conforming to a pulse code modulation (Pulse-Code Modulation, PCM) format, that is, in the present embodiment, the digital signal format converter 38 can Convert the original digital voice signal conforming to the standard digital voice format such as I2S, SPDIF, etc. into a digital voice signal conforming to a pulse code modulation format.

In actual implementation, since the digital signal format converter 38 is mainly used to convert the digital voice signal from I2S or SPDIF to the standard digital voice format of PCM, if the first digital voice signal is the standard digital voice format of SPDIF, then it is necessary to In addition, the first digital voice signal is converted into a standard digital voice format conforming to I2S by a SPDIF to I2S format converter (not shown in the figure). Of course, this SPDIF to I2S format converter can be set in the digital The signal format converter 38 or the signal selector 36 is used to meet the requirements of different input formats. As for the second digital audio signal converted by the analog-to-digital conversion circuit 34 , it conforms to the I2S standard digital audio format, so no additional conversion is required.

Please refer to FIG. 2 , the setting and function of the synthesizing module 40 are also one of the important technical features of the present invention. The pulse code voice signal and the control signal generated by the digital signal format converter 38 are synthesized into a digital signal with a bit stream form, and the control signal is a digital data signal, which occupies a small amount of data compared with the voice signal, but It carries some information that can control the specific properties of the voice signal. For example, the control signal can be used to adjust the volume, or fine-tune the frequency channel of the signal transmitted in the air to avoid interference. In the present embodiment, the synthesis module 40 is composed of a synthesis unit 42 and a frame unit 46 (Framing unit). The above synthesized signal is added with error protection code header (Header) data and tail (Tail) data to make it into a frame (frame) signal, and output a digital signal in the form of a bit stream. It can be seen from the above that the device 32 disclosed in this embodiment can receive different types of input signals and provide voice and data multiplexed transmission.

Please refer to FIG. 3 . FIG. 3 is a functional block diagram of a transmitter 30 of the wireless audio system including the device 32 in FIG. 2 . The transmitter 30 in FIG. 3 includes a signal modulation module 48 (Modulation Module) and a transmission circuit 50 in addition to the device 32 in FIG. 2 that can provide voice and data multiplex transmission. The signal modulation module 48 is electrically connected to the synthesis module 40, and is used for modulating the digital signal in the form of a bit stream to generate a corresponding baseband (Baseband) signal. In fact, the signal modulation module 48 can be divided into a modulation circuit 47 and a modulation circuit 47 according to functions. A spread spectrum circuit 49 (Spreading Circuit), the modulation circuit 47 can be π/4-DQPSK (Differential Quadrature Phase Shift Keying) modulation circuit, mainly used for the digital signal with bit stream form outputted by the synthesis module 40 for modulation processing, To generate a modulated signal, and the spread spectrum circuit 49 is electrically connected to the modulated circuit 47, the spread spectrum circuit 49 can perform convolution (convolution and multiplication) operations on the modulated signal and a spread spectrum code, which is equivalent to converting the modulated signal Each bit of is replaced by a plurality of bits to generate the fundamental frequency signal. The baseband signal will be converted into a high frequency radio frequency signal by the transmission circuit 50 and transmitted to the air by radio.

The embodiment in FIG. 3 describes the overall structure of the transmitter 30 of the wireless audio system of the present invention. However, a complete wireless audio system also needs to receive relevant parts of the data to provide a complete "transmit-receive" function of information. Please refer to Fig. 4, Fig. 4 is the functional block diagram of the embodiment of another device 62 disclosed by the present invention, the device 62 of this embodiment can also be used to provide voice and data multiplexing transmission, but different from the embodiment of Fig. 2 Yes, the device 62 of this embodiment is mainly suitable for a receiver end of a wireless audio system, for receiving a digital signal in the form of a bit stream and outputting different types of output signals (Output Signal) according to requirements, which includes a separation Module 64 , a digital signal format converter 68 , a signal judge 70 , and a digital-to-analog converter (Digital-to-Analog Converter) 78 . The separation module 64 is used to separate the received digital signal in the form of a bit stream into a control signal (Digital Control Signal) and a pulse code voice signal, and then the digital signal format converter 68 electrically connected to the separation module 64 can convert the pulse The code voice signal is converted into a digital voice signal, and the signal judger 70 electrically connected to the digital signal format converter 68 can judge the digital voice signal as a first digital voice signal or a second digital voice signal according to the needs of the user. signal, and finally the digital-to-analog conversion circuit 78 is electrically connected to the signal judger 70 for converting the second digital voice signal into an analog voice signal. It can be known from the above that the multiple output signals output by the device 62 of this embodiment may include digital voice signals, analog voice signals, and control signals with specific information that can control the voice signals.

In addition, in this preferred embodiment, since the output format of the first digital voice signal can be I2S or SPDIF standard digital voice format, and the digital voice signal generated by the digital signal format converter 68 is I2S or SPDIF format, therefore When device 62 will output the digital voice signal of SPDIF format, then need to convert the first digital voice signal I2S format into SPDIF format by an I2S to SPDIF format converter in addition, and this I2S turns to SPDIF format converter can be set on digital In the signal format converter 68 or in the signal judger 70 . As for the second digital voice signal, the I2S format can be directly input into the digital-to-analog conversion circuit 78, so no additional standard digital voice format conversion is required. The digital voice signal that has been converted into a standard digital voice format such as I2S, SPDIF, etc. will pass through the signal judging device 70 at last, and it is judged that the digital voice signal is the first digital voice signal that can be directly output or must pass through the digital-to-analog conversion circuit The second digital voice signal processed by 78, and in actual implementation, the signal judger 70 can be completed as a demultiplexer (DeMUX) or other components with sufficient judgment functions.

Please refer to Fig. 4, the separation module 64 of the present embodiment is made up of a frame synchronization control unit (Frame Synchronization Control Unit) 66 and a separation unit 67, and the frame synchronization control unit 66 according to the received digital signal with bit stream form Analyze the header data and tail data, find out the beginning of the frame signal, and confirm the correctness of the frame signal, convert the received digital signal in the form of a bit stream into a digital signal, and simultaneously output the The digital signal is controlled for timing and data synchronization. After the digital signal is processed by the separation unit 67, it will be separated into a control signal and a pulse-code voice signal conforming to a pulse-code modulation (pulse-code modulation, PCM) format. In actual implementation, the separation unit 67 can be replaced by other components capable of separating signals. Immediately afterwards, the separated pulse code voice signal will be processed by the digital signal format converter 68, and the control signal will be directly output for further analysis. The control signal is a digital data signal, compared with the voice signal. The volume is not large, but it carries some information that can control certain properties of the voice signal. For example, the control signal can be used to adjust the volume or fine-tune the channel on which the signal is transmitted in the air to avoid interference.

Please refer to FIG. 5 . FIG. 5 is a functional block diagram of the architecture of the receiver 60 of the wireless audio system including the device 62 in FIG. 4 . The embodiment in FIG. 5 fully describes the architecture and functions of the receiver 60 of the wireless audio system. Figure 5 receiver 60 also includes a receiving circuit 72 and a signal demodulation module (DemodulationModule) 74, except that Figure 4 can provide the device 62 for voice and data multiplex transmission, and the receiving circuit 72 can receive a radio frequency from the air signal and generate a corresponding baseband signal, and the signal demodulation module 74 is electrically connected to the receiving circuit 72, basically performs the inverse operation of the signal modulation module 48, and is used to demodulate the baseband signal to become the There is a digital signal in the form of a bit stream. In this embodiment, the signal demodulation module 74 includes a despreading (Despreading) circuit 72 and a demodulation circuit 75. The corresponding more detailed steps are that the despreading circuit 73 converts the base After the frequency signal and a spread spectrum code generate a convolution relationship, the base frequency signal is converted into a despread signal, and the demodulation circuit 75 performs demodulation in the form of π/4-DQPSK for the despread signal. The act of demodulating a signal to produce a digital signal in the form of a bit stream.

It can be known from the above embodiments that the embodiments in FIG. 2 and FIG. 3 actually correspond to the embodiments in FIG. 4 and FIG. 5 , and play the role of data transmission and reception respectively. Combining all the aforementioned embodiments, the complete technical features of the wireless audio system of the present invention have been described. Please refer to FIG. 3 and the architecture of the embodiment in FIG. 5 . The wireless audio system 80 includes a transmitter (Transmitter) 80A and a receiver (Receiver) 80B. The transmitter 80A is used to receive a plurality of input signals of different types. In this embodiment, the plurality of input signals include an analog voice input signal, a first digital voice input signal, and a control input signal. The transmitter 80A includes an analog-to-digital conversion circuit 84 , a selection synthesis device 81 , a signal modulation module 98 , and a transmission circuit 100 . The analog-to-digital conversion circuit 84 is used to convert the analog voice input signal into a corresponding second digital voice input signal, and the converted second digital voice input signal is combined with the first digital voice input signal and the control input signal Input to the selection synthesis device 81, the selection synthesis device 81 can select one of the first digital voice input signal and the second digital voice input signal for signal format conversion processing, and combine the converted digital voice signal with the control input signal to output A digital input signal in the form of a bit stream is then electrically connected to the signal modulation module 98 of the selective synthesis device 81 to modulate the digital input signal in the form of a bit stream to generate a corresponding baseband signal, and the transmission circuit 100 is electrically connected to the signal After the modulation module 98, the baseband signal can be converted into a radio frequency signal and sent to the air. The receiver 80B corresponding to the transmitter 80A is used to receive the radio frequency signal sent by the transmitter 80A, and output a plurality of different types of output signals. The receiver 80B includes a receiving circuit 102 , a signal demodulation module 104 , a separation judging device 13 , and a digital-to-analog conversion circuit 118 . The receiving circuit 102 is used to receive the radio frequency signal and generate a corresponding baseband signal. The signal demodulation module 104 is electrically connected to the receiving circuit 102, and can demodulate the baseband signal into a digital output signal in the form of a bit stream, and separate The judging device 113 is used to separate the digital output signal in bit stream form into a control output signal and a digital voice output signal, and determine whether the digital voice output signal is a first digital voice output signal or a second digital voice output signal , if it is the first digital voice output signal, it will be directly output, if it is the second digital voice output signal, it will be output to the digital-to-analog conversion circuit 118, and the second digital voice output signal will be converted into a corresponding analog voice output signal, please note , in FIG. 6, the analog voice output signal, the first digital voice output signal, the second digital voice output signal, and the control output signal at the receiver 80B end are respectively corresponding to the analog voice input signal at the transmitter 80A end, the first digital voice output signal The input signal, the second digital voice input signal, and the control input signal.

In the transmitter 80A of the wireless audio system 80 in FIG. 6 , the combination of the analog-to-digital conversion circuit 84 and the selection synthesis device 81 can be regarded as a device 82 that can provide voice and data multiplex transmission, one of the technical characteristics of the present invention, This device 82 also corresponds to the device 32 described in FIGS. 2 and 3. Similarly, in the receiver 80B of the wireless audio system 80 in FIG. Another technical feature of the present invention is a device 112 capable of providing voice and data multiplex transmission, which also corresponds to the device 62 described in FIG. 4 and FIG. 5 . Please refer to FIG. 7 , which is a functional block diagram of a detailed embodiment of the wireless audio system 80 in FIG. 6 . In Fig. 7, the selection synthesizing device 81 of transmitter 80A end is subdivided according to function, comprises a signal selector 86, a digital signal format converter 88, a synthesizing module 90 (Synthesizing Module), synthesizing module 90 can be divided into one again Composition unit 92 and a frame unit 96 (Framing Unit). The signal selector 86 is electrically connected to the analog-to-digital conversion circuit 84, and can be completed with a synthesis unit 92 during actual implementation, and wherein the first digital voice input signal can conform to standard digital voice formats such as I2S, SPDIF, and the second digital voice Voice input signal conforms to SPDIF standard digital voice format. The digital signal format converter 88 can be used to convert the first digital voice input signal or the second digital voice input signal output from the signal selector 86 into a pulse code voice signal conforming to a pulse code modulation (pulse-codemuodlation, PCM) format , the synthesis unit 92 in the synthesis module 90 receives the pulse code voice signal and the control signal simultaneously and synthesizes the two, and the frame unit 96 adds the header and the tail data of the error protection code to the above-mentioned synthesized signal, so that it becomes A frame signal, and after timing control and data synchronization, output a digital signal in the form of a bit stream. The signal modulation module 98 of the transmitter 80A also includes a modulation circuit 97 that can modulate the digital signal in the form of a bit stream to output a modulated signal, and is used to perform operations on the modulated signal and a spreading code to output A spreading circuit (Spreading Circuit) 99 for the baseband signal.

Please continue to refer to FIG. 7, the signal demodulation module 104 at the receiver 80B includes a despreading circuit 103 and a demodulation circuit 105, and the despreading circuit 103 generates a convolution relationship between the baseband signal and a spreading code, etc. Afterwards, the baseband signal is converted into a despread signal, and the demodulation circuit 105 performs the signal demodulation operation on the despread signal to generate the digital output signal in the form of a bit stream, and the separation and judgment device 113 can correspond to The function of the selection synthesis device 81 is subdivided into a separation module 114 , a digital signal format converter 108 , and a signal judger 110 . The separation module 114 is used to separate the digital output signal in the form of a bit stream into the control output signal and the pulse code voice signal, and the digital signal format converter 108 converts the pulse code voice signal into a standard digital voice format such as I2S, SPDIF, etc. The digital voice output signal, and the signal determiner 110 can be a demultiplexer or other components that can be used to determine the signal, and determine the digital voice output signal as the first digital voice output signal or the second digital voice output signal.

The transmitter end and the receiver end of the wireless audio system disclosed in the present invention respectively use a related device that can provide voice and data multiplex transmission, so that the wireless audio system of the present invention can receive a plurality of different types of input signals (Input Signal) and can output the same or different type of output signal (Output Signal) as the input signal, and integrate the related control signal into the wireless audio system to provide a variety of options for input and output interface signals. When the user pays attention to the transmission signal In terms of quality, you can choose to use the transmission and reception method of digital voice signals to truly present the complete data, and you can also inherit the functions of known analog voice signals to transmit and receive analog voice signals, and at the same time integrate the control signal into the wireless audio system with a small amount of bandwidth. The system is for users to transmit and receive various analog and digital signals at the same time, truly meeting the transmission needs of users to flexibly adapt to different occasions.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the patent of the present invention.

Claims (29)

1. A device for providing voice and data multiplex transmission, suitable for use in a wireless audio system, which receives a plurality of input signals of different types, the plurality of input signals at least including an analog voice signal, a first A digital voice signal, and a control signal, which includes: an analog-to-digital conversion circuit for converting the analog voice signal into a second digital voice signal; a signal selector electrically connected to the analog-to-digital conversion circuit for selecting an output from the first digital voice signal and the second digital voice signal; a digital signal format converter, electrically connected to the signal selector, for converting the first digital voice signal or the second digital voice signal into a pulse code voice signal; and A synthesizing module, electrically connected to the digital signal format converter, is used to synthesize the control signal and the pulse code voice signal into a digital signal in bit stream form. 2. The device of claim 1, wherein the pulse code voice signal is a digital voice signal conforming to a Pulse Code Modulation (PCM) format. 3. The device of claim 1, wherein the signal selector is a multiplexer for selecting an output from the first digital voice signal and the second digital voice signal. 4. The device of claim 1, wherein the wireless audio system further comprises a signal modulation module electrically connected to the synthesis module for modulating the digital signal in bit stream form to generate a corresponding baseband signal. 5. The device of claim 4, wherein the signal modulation module comprises: A modulation circuit, electrically connected to the synthesis module, used to modulate the digital signal in the form of a bit stream to generate a modulated signal; and a frequency spreading circuit, electrically connected to the modulation circuit, used to modulate the modulated signal The signal is operated with a spreading code to generate the baseband signal. 6. The device of claim 1, wherein the wireless audio system further comprises a transmission circuit electrically connected to the signal modulation module for converting the baseband signal into a radio frequency signal and transmitting the radio frequency signal into the air. 7. The device of claim 6, wherein the wireless audio system further comprises a receiver comprising: A receiving circuit for receiving the radio frequency signal and generating a corresponding baseband signal; A signal demodulation module, electrically connected to the receiving circuit, used to demodulate the baseband signal into a digital signal in the form of a bit stream; A separation module, electrically connected to the signal demodulation module, used to separate the digital signal in bit stream form into a control signal and a pulse code voice signal; A digital signal format converter, electrically connected to the separation module, for converting the pulse code voice signal into a digital voice signal; A signal judger, electrically connected to the digital signal format converter, for judging the pulse code voice signal as a first digital voice signal or a second digital voice signal; and A digital-to-analog conversion circuit, electrically connected to the signal judger, is used to convert the second digital voice signal into an analog voice signal. 8. The device of claim 7, wherein the signal judging device is a demultiplexer for judging the pulse code voice signal as the first digital voice signal or the second digital voice signal. 9. The device according to claim 7, wherein the signal demodulation module comprises a despreading circuit and a demodulation circuit, wherein the despreading circuit generates a convolution relationship between the baseband signal and a spreading code, The base frequency signal is converted into a despread signal, and the demodulation circuit performs signal demodulation operation on the despread signal to generate the digital signal in bit stream form. 10. A device for providing voice and data multiplex transmission, suitable for use in a wireless audio system, which receives a digital signal in the form of a bit stream, comprising: A separation module, used to separate the digital signal in bit stream form into a control signal and a pulse code voice signal; A digital signal format converter, electrically connected to the separation module, for converting the pulse code voice signal into a digital voice signal; a signal judger, electrically connected to the digital signal format converter, for judging the digital signal as a first digital voice signal or a second digital voice signal; and A digital-to-analog conversion circuit, electrically connected to the signal judger, is used to convert the second digital voice signal into an analog voice signal. 11. The device of claim 10, wherein the signal determiner is a demultiplexer for determining the digital voice signal as the first digital voice signal or the second digital voice signal. 12. The device according to claim 10, wherein the wireless audio system further comprises a receiving circuit and a signal demodulation module, wherein the receiving circuit is used to receive a radio frequency signal and generate a corresponding baseband signal, and the signal demodulation The module is electrically connected to the receiving circuit and used to demodulate the base frequency signal into the digital signal in the form of bit stream. 13. The device according to claim 12, wherein the signal demodulation module comprises a despreading circuit and a demodulation circuit, wherein the despreading circuit generates a convolution relationship between the baseband signal and a spreading code, The base frequency signal is converted into a despread signal, and the demodulation circuit performs signal demodulation operation on the despread signal to generate the digital signal in bit stream form. 14. The device of claim 10, wherein the PCS voice signal is a digital voice signal conforming to a PCC modulation format. 15. The device of claim 10, wherein the wireless audio system further comprises a transmitter for receiving a plurality of input signals of different types, the plurality of input signals at least including an analog voice signal, a first digital voice signal signal, and a control signal, which includes: an analog-to-digital conversion circuit for converting the analog voice signal into a second digital voice signal; a signal selector electrically connected to the analog-to-digital conversion circuit for selecting an output from the first digital voice signal and the second digital voice signal; A digital signal format converter, electrically connected to the signal selector, for converting the first digital voice signal or the second digital voice signal into a pulse code voice signal; a synthesis module, electrically connected to the digital signal format converter, for synthesizing the control signal and the pulse code voice signal into a digital signal in the form of a bit stream; A signal modulation module, electrically connected to the synthesis module, used to modulate the digital signal in the form of a bit stream to generate a corresponding base frequency signal; and A transmission circuit, electrically connected to the signal modulation module, is used to convert the base frequency signal into a radio frequency signal and transmit the radio frequency signal to the air. 16. The device of claim 15, wherein the signal selector is a multiplexer for selecting an output from the first digital voice signal and the second digital voice signal. 17. The device of claim 15, wherein the signal modulation module comprises: a modulating circuit for modulating the digital signal in the form of a bit stream to generate a modulated signal; and A frequency spreading circuit is electrically connected to the modulating circuit, and is used for calculating the modulated signal with a spreading code to generate the base frequency signal. 18. A wireless audio system capable of multiplexing voice and data transmission, comprising: A transmitter for receiving multiple input signals of different types, the multiple input signals at least include a first digital voice input signal and a control input signal, the transmitter includes: a selective synthesis device for converting the first digital voice input signal into a signal format, combining the converted digital voice signal with the control input signal, and outputting a digital input signal in the form of a bit stream; and A signal modulation module, electrically connected to the synthesizing device, used to modulate the digital input signal in the form of a bit stream to generate a corresponding base frequency signal; and a transmission circuit, electrically connected to the signal modulation module, for converting the baseband signal into a radio frequency signal and transmitting the radio frequency signal into the air; and A receiver for receiving the radio frequency signal and outputting a plurality of output signals of different types, the receiver includes: A receiving circuit for receiving the radio frequency signal and generating a corresponding baseband signal; A signal demodulation module, electrically connected to the receiving circuit, used to demodulate the baseband signal into a digital output signal in the form of a bit stream; A separating and judging device for separating the digital signal in the form of a bit stream into a control output signal and a digital voice output signal; Wherein the first digital voice output signal and the control output signal correspond to the first digital voice input signal and the control input signal respectively. 19. The wireless audio system as claimed in claim 18, wherein the signal modulation module comprises: A modulation circuit, which is a π/4-DQPSK modulation circuit, is used for modulating the digital signal in bit stream form to output a modulated signal; and A frequency spreading circuit is electrically connected to the modulating circuit, and is used for calculating the modulated signal with a spreading code to output the base frequency signal. 20. The wireless audio system of claim 18, wherein the plurality of input signals further comprises an analog voice input signal. 21. The wireless audio system as claimed in claim 20, wherein the transmitter comprises an analog-to-digital conversion circuit for converting the analog voice input signal into a corresponding second digital voice input signal, and as for the selection synthesizing means One of the first digital voice input signal and the second digital voice input signal needs to be selected for signal format conversion processing. 22. The wireless audio system as claimed in claim 21, wherein the separation judging device in the receiver is used for judging whether the digital voice output signal is a first digital voice output signal or a second digital voice output signal. 23. The wireless audio system as claimed in claim 22, wherein the receiver comprises a digital-to-analog conversion circuit electrically connected to the separation judging device for converting the second digital voice output signal into a corresponding analog voice output signal. 24. The wireless audio system of claim 23, wherein the analog voice output signal and the second digital voice output signal correspond to the analog voice input signal and the second digital voice input signal respectively. 25. The wireless audio system of claim 24, wherein the selection synthesis means comprises: a signal selector electrically connected to the analog-to-digital conversion circuit for selecting an output from the first digital voice input signal and the second digital voice input signal; a digital signal format converter, electrically connected to the signal selector, for converting the first digital voice input signal or the second digital voice input signal into a pulse code voice signal; and A synthesizing module, electrically connected to the digital signal format converter, is used to synthesize the control input signal and the pulse code voice signal into the digital input signal in bit stream form. 26. The wireless audio system of claim 18, wherein the pulse code voice signal is a digital voice signal conforming to a Pulse Code Modulation (PCM) format. 27. The wireless audio system as claimed in claim 24, wherein the separation judging means comprises: A separation module, used to separate the digital output signal in bit stream form into the control output signal and the pulse code voice signal; A digital signal format converter, electrically connected to the separation module, for converting the pulse code voice signal into the digital voice output signal; and A signal judger, electrically connected to the digital signal format converter, is used to judge the digital voice output signal as the first digital voice output signal or the second digital voice output signal. 28. The wireless audio system of claim 18, wherein the pulse code voice signal is a digital voice signal conforming to a Pulse Code Modulation (PCM) format. 29. The wireless audio system as claimed in claim 18, wherein the signal demodulation module comprises a despreading circuit and a demodulation circuit, wherein the despreading circuit generates a convolution relationship between the baseband signal and a spreading code Afterwards, the baseband signal is converted into a despread signal, and the demodulation circuit performs signal demodulation on the despread signal in the form of π/4-DQPSK to generate the digital output signal in the form of a bit stream .

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