CN111370039A - Audio playing device and method for playing audio - Google Patents

Abstract

The invention discloses an audio playing device and a method for playing audio, wherein the audio playing device comprises a micro control unit, a voice synthesis unit and a loudspeaker unit. The micro-control unit is configured to be connected with the serial data communication interface and used for receiving character codes from the serial data communication interface and converting the character codes into text reading signals. The speech synthesis unit is configured to be connected to the micro-control unit for receiving the text reading signal and converting it into an audio signal. The loudspeaker unit is configured to be connected with the voice synthesis unit and used for playing the audio signal. The invention can convert the character code obtained from the serial data communication interface into the audio signal and play the audio signal without storing any audio file.

Description

Audio playing device and method for playing audio

Technical Field

The present invention relates generally to the field of audio playback technology. More particularly, the present invention relates to an audio playback apparatus and a method for playing back audio.

Background

Existing reading methods for text content include two forms, human and machine. When the text content is read manually, although the text content reading method has the characteristics of good reading effect and complete and sufficient expression emotion, the text content reading method has the problem of high labor cost correspondingly when the text content is read manually. When the reading of text content is completed in a machine mode, the reading mode of the machine usually needs to record and store different sound files in advance, and then the different sound files are in one-to-one correspondence with the trigger signals. When the machine is required to play the specified sound, the machine is enabled to finish the selection of the sound file and finish the reading of the text content by sending the character code which is used as the trigger signal and corresponds to the text content to the machine, and the reading mode adopting the machine has the defects of large storage capacity and large workload. Therefore, the existing reading methods have the conditions of high labor cost, large storage capacity and large workload.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an audio playing apparatus and a method for playing audio, which can encode and convert characters obtained from a serial data communication interface into an audio signal and play the audio signal, so that it is not necessary to store any audio file.

In order to achieve the above purpose, the present invention proposes the following technical solutions:

in a first aspect, the present invention provides an audio playback apparatus comprising:

the micro-control unit is connected with the serial data communication interface and used for receiving the character codes from the interface and converting the character codes into text reading signals;

a speech synthesis unit configured to be connected with the micro control unit for receiving the text reading signal and converting it into an audio signal; and

a speaker unit configured to be connected to the voice synthesis unit for playing the audio signal.

In one embodiment, the speech synthesis unit comprises an audio conversion module for receiving the text reading signal and converting it into an audio signal.

In one embodiment, the speech synthesis unit further comprises an operational amplification module configured to be connected to the audio conversion module for amplifying the power of the audio signal.

In an embodiment, the speech synthesis unit further includes an audio isolation transformer, and the audio isolation transformer is configured to be connected in series between the operational amplification module and the speaker unit, and is configured to perform isolation processing on the amplified audio signal and transmit the audio signal to the speaker unit.

In one embodiment, the isolation process of the audio isolation transformer includes performing power isolation by coil mutual inductance.

In one embodiment, the serial data communication interface is an RS232 or RS485 interface.

In one embodiment, the micro control unit is connected to the speech synthesis unit via a universal synchronous asynchronous receiver transmitter.

In one embodiment, the character encoding is unicode in 16.

In a second aspect, the present invention also provides a method for playing audio, comprising:

receiving character codes through a serial data communication interface;

converting the character codes into text reading signals;

converting the text reading signal into an audio signal; and

and playing the audio signal.

In one embodiment, further comprising:

amplifying the power of the converted audio signal; and

and performing isolation processing on the amplified audio signal for playing.

Compared with the prior art, the invention has the following beneficial effects:

when text content needs to be read, the micro-control unit decodes the character codes of the serial data communication interface and converts the character codes into text reading signals which can be recognized by the voice synthesis unit, and the text reading signals can be converted into audio signals which can be output by the speaker unit through the voice synthesis unit. Therefore, the invention does not need to record and store the sound file in advance, and does not need to trigger the corresponding sound file to play the sound through different trigger signals. Furthermore, the sound file does not need to be recorded and stored in advance in the process of playing the sound, so that the sound file, the sound file and the trigger signal are not stored according to the corresponding rule, and the purposes of reducing labor cost, storage capacity and workload are achieved.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a block diagram showing a configuration of an audio playback apparatus according to an embodiment of the present invention;

fig. 2 is a block diagram showing a configuration of a speech synthesis unit of an audio playback apparatus according to an embodiment of the present invention;

fig. 3 is a circuit configuration diagram showing a micro control unit of an audio playback apparatus according to an embodiment of the present invention;

fig. 4 is a circuit configuration diagram showing a voice synthesis unit of an audio playback apparatus according to an embodiment of the present invention;

fig. 5 is a flow chart illustrating a method for playing audio according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

Fig. 1 is a block diagram showing a configuration of an audio playback apparatus according to an embodiment of the present invention. As shown in fig. 1, the audio playback apparatus 100 of the present invention may include a micro control unit 101, a voice synthesis unit 102, and a speaker unit 103, among others. In one embodiment, micro-control unit 101 may be configured to interface with a serial data communication interface to receive character encodings from the serial data communication interface and convert the character encodings to text speakable signals. In one embodiment, the speech synthesis unit 102 may be configured to be connected with the micro control unit 101 for receiving the text reading signal from the micro control unit 101 and converting it into an audio signal. In one embodiment, a speaker unit (or speaker) 103 may be configured to be connected to the speech synthesis unit 102 for playing an audio signal from the speech synthesis unit 102.

In practical operation, the audio playback apparatus 100 of the present invention can encode and convert characters received from the serial data communication interface into audio signals and play them back through the micro control unit 101, the speech synthesis unit 102, and the speaker unit 103, which are connected in series in this order. Specifically, when text content needs to be spoken, the micro control unit 101 may decode a character code (e.g., unicode in 16 systems) received from a serial data communication interface (e.g., RS232 or RS485 interface), and convert the decoded content into a text speaking signal that can be recognized by the speech synthesis unit 102. Then, the speech synthesis unit 102 may convert the text reading signal into a playable audio signal, and supply it to the speaker unit 103 for play output. Since the character codes of the serial data communication interface can be converted into the audio signals and played, the audio playing apparatus 100 of the present invention does not need to record and store the sound files in advance, and does not need to trigger the corresponding sound files to play the sound through different trigger signals as in the prior art. Therefore, the sound file and trigger signal corresponding rule are not stored, and the purposes of reducing labor cost, storage amount and workload can be achieved.

Fig. 2 is a block diagram showing the structure of the speech synthesis unit 102 of the audio playback apparatus according to the embodiment of the present invention. As shown in the figure, the speech synthesis unit 102 may include, among others, an audio conversion module 1021, an operational amplification module 1022, and an audio isolation transformer 1023 connected in sequence.

In one or more embodiments, audio conversion module 1021 may be configured to receive the text-speaking signal and convert it into an audio signal that can be recognized by an external playback device such as a speaker. In one or more embodiments, the speech synthesis unit 102 of the present invention may further include an operational amplification module 1022, and the operational amplification module 1022 may be configured to be connected to the audio conversion module 1021 and configured to amplify the power of the audio signal. Through the operation of the operational amplification module 1022, the power loss of the audio signal during transmission through the line can be compensated.

In one or more embodiments, the speech synthesis unit 102 of the present invention may further include an audio isolation transformer 1023, and the audio isolation transformer 1023 may be configured to be connected in series between the operational amplification module 1022 and the speaker unit 103, and is configured to perform isolation processing on the amplified audio signal and transmit the processed audio signal to the speaker unit 103. Preferably, the isolation process of the audio isolation transformer 1023 may include performing power isolation by coil mutual inductance. Specifically, the audio isolation transformer 1023 can isolate the power supply connected to the audio playing device 100 through the mutual inductance of the coil, so as to prevent the signal interference between the input terminal and the output terminal, thereby ensuring that the audio signal output by the audio isolation transformer 1023 has a low signal interference degree.

The main components and connections constituting the audio playback apparatus 100 of the present invention are exemplarily described above with reference to fig. 1 and fig. 2, but elements and connections not mentioned in the embodiments of the present invention are also conceivable to those skilled in the art according to the teachings of the embodiments of the present invention, and thus modifications or changes may be made to the components and connections in the above-described apparatus to achieve the same or similar effects. For example, in one or more embodiments, the serial data communication interface connected to the audio playback device 100 of the present invention may be an RS232 or RS485 interface, and the character code sent by the serial data communication interface to the micro control unit 101 may be a unicode in 16 systems. In addition, the micro control unit 101 may be connected to the speech synthesis unit 102 through a universal synchronous asynchronous receiver transmitter ("USART"), for example, to an audio conversion module 1021 in the speech synthesis unit 102.

Fig. 3 is an exemplary circuit configuration diagram illustrating the micro control unit 101 of the audio playback apparatus according to the embodiment of the present invention. As shown in fig. 3, the reference numerals 1 to 64 on the external pins of U24A and U24B indicate the corresponding ports when the mcu 101 makes external connections. Specifically, U24A is used to represent the IO interface of the mcu 101, and U24B is used to represent the power interface of the mcu 101. As further shown in the figure, interfaces No. 5, No. 7 and No. 60 of the IO interface on the mcu 101 are commonly connected to an active crystal oscillator XTAL2 to provide a stable clock signal, so as to improve the stability of the mcu 101 during operation. As further shown, mcu 101 further includes a program download port P2 for completing program updates or replacements within mcu 101. In addition, when the micro control unit 101 is connected to the audio conversion module 1021 (embodied as XFS5152CE chip in fig. 4) described below, the pins 41 to 43 thereof are connected to the pins 1 to 3 on the XFS5152CE chip, so as to realize information transmission therebetween.

Fig. 4 is a circuit configuration diagram illustrating the voice synthesis unit 102 of the audio playback apparatus according to the embodiment of the present invention. As shown in the figure, the circuit of the speech synthesis unit 102 may include an audio conversion module 1021, an operational amplification module 1022 and an audio isolation transformer 1023.

In one or more embodiments, the audio conversion module 1021 of the present invention (e.g., U26 shown in FIG. 4) may be illustratively an XFS5152CE chip, with the 1 to 16 reference numerals thereon representing the pins to which it is externally connected. The XFS5152CE chip has the following characteristics: first, the XFS5152CE chip can support the synthesis of any chinese text, english text, and support mixed reading of chinese and english. Secondly, the XFS5152CE chip can also support the function of voice editing code, when using the XFS5152CE chip, the user can use the XFS5152CE chip to directly record and play. Third, the XFS5152CE chip can integrate voice recognition functions, can accomplish recognition of 30 command words, and supports the command word customization needs of the user. Fourthly, 80 common prompting sound effects can be integrated in the XFS5152CE chip, and the XFS can be suitable for various scenes. Fifthly, the XFS5152CE chip can support three communication modes of UART, I2C and SPI. For example, the 4 communication baud rates supported by the UART serial port may be set as: 4800bps, 9600bps, 57600bps and 115200bps, and the user can set the setting by himself or herself according to the situation. Sixth, the XFS5152CE chip may support a variety of control commands, such as synthesize text, stop synthesis, pause synthesis, resume synthesis, status inquiry, enter power save mode, wake up, and the like. Seventh, the XFS5152CE chip can support multiple ways to query its operating status, and the query of the operating status can include: query status pin level, working status word automatically returned by reading chip, and return data to obtain the working status of XFS5152CE chip by sending query command.

Connected to the audio conversion module 1021 is an operational amplifier module 1022 (shown as U25 in fig. 4), on which reference numerals 1 to 8 denote pins for external connection. As can be seen from the exemplary connections shown in the figure, pin 2 of the operational amplification module 1022 is connected to the first capacitor C62 and the first resistor R100 and is grounded, and the other end of the first resistor R100 connected to pin 2 of the operational amplification module 1022 is connected to the second capacitor C65, and further, the other end of the second capacitor C65 connected to the first resistor R100 is connected to the audio isolation transformer 1023 and is grounded. Meanwhile, the other end of the first capacitor C62, to which the first resistor R100 is connected, is connected to the audio conversion module 1021. Illustratively, the pin 7 of the operational amplifier module 1022 is connected to the third capacitor C64, and is connected between the second capacitor C65 and the audio isolation transformer 1023. The No. 6 pin of the operational amplifier module 1022 is connected to the fourth capacitor C66, and is connected between the second capacitor C65 and the audio isolation transformer 1023. Illustratively, the pin 4 of the operational amplifier module 1022 is connected between the second capacitor C65 and the audio isolation transformer 1023. The No. 5 pin of the operational amplifier module 1022 is connected to the second resistor R99, the fifth capacitor C60 and the sixth capacitor C61 in sequence, and then connected to the audio isolation transformer 1023. For example, the pin No. 5 of the operational amplification module 1022 may be further connected to the seventh capacitor C63 and the third resistor R101 in sequence, and then connected between the second capacitor C65 and the audio isolation transformer 1023.

Reference numerals 1 to 4 on the audio isolation transformer 1023 (L9 as shown in fig. 4) denote its ports connected to the outside. In an exemplary connection, port No. 1 of one of the coils of the audio isolation transformer 1023 is connected to a sixth capacitor C61, and port No. 2 is connected to a third resistor R101 and to ground. Further, two ports (ports No. 3 and No. 4 as shown in fig. 4) of the other coil of the audio isolation transformer 1023 may be used for connection with the speaker unit 103 or the megaphone.

Fig. 5 is a flow diagram illustrating a method 200 for playing audio according to an embodiment of the present invention. As shown in fig. 5, the method 200 may include at least the following steps: first, at step 201, the method 200 receives a character encoding over a serial data communication interface. Next, after receiving the character encoding, the method 200 converts the character encoding into a text speakable signal at step 202. After converting the character code to a text-speaking signal, the method 200 converts the text-speaking signal to an audio signal at step 203. After converting the text-reading signal to an audio signal, the method 200 plays the audio signal at step 204. Since the method 200 can directly convert the character codes sent by the serial data communication interface into readable audio signals, the sound playing of the reading text is completed on the premise that the sound file and the corresponding rule of the sound file and the trigger signal are not stored.

To facilitate a sufficient understanding of the method 200 by those skilled in the art, the method 200 is described below in conjunction with the audio playback device 100 described above. Therein, at step 201, the method 200 may receive character encoding through a serial data communication interface with the micro control unit 101 of the audio playback device 100. Further, at step 202, the method 200 may employ the micro-control unit 101 of the audio playback device 100 to convert the character code into a text reading signal. Further, at step 203, the method 200 may convert the text reading signal into an audio signal using the speech synthesis unit 102 of the audio playback device 100. Further, at step 204, the method 200 may employ the speaker unit 103 of the audio playing apparatus 100 to play the audio signal.

In one or more embodiments, the method for playing audio may further include: the method 200 amplifies the power of the converted audio signal, and the power loss of the audio signal during transmission through the line can be compensated through the amplification of the power of the audio signal. Next, the method 200 performs an isolation process on the amplified audio signal, and since the audio signal is isolated, no other interference signal is mixed during playing the audio signal.

It should be understood that the terms "first," "second," "third," and "fourth," etc. in the claims, description, and drawings of the present disclosure are used to distinguish between different objects and are not used to describe a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this disclosure, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. As used in the specification and claims of this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this disclosure refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

As used in this specification and claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

Although the embodiments of the present invention are described above, the descriptions are only examples for facilitating understanding of the present invention, and are not intended to limit the scope and application scenarios of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. An audio playback apparatus comprising:

the micro-control unit is connected with the serial data communication interface and used for receiving the character codes from the serial data communication interface and converting the character codes into text reading signals;

a speech synthesis unit configured to be connected with the micro control unit for receiving the text reading signal and converting it into an audio signal; and

a speaker unit configured to be connected to the voice synthesis unit for playing the audio signal.

2. The audio playback device of claim 1, wherein the speech synthesis unit comprises an audio conversion module for receiving the text-speaking signal and converting it into an audio signal.

3. The audio playback apparatus of claim 2, wherein the speech synthesis unit further comprises an operational amplification module configured to be connected to the audio conversion module for amplifying the power of the audio signal.

4. The audio playing device as claimed in claim 3, wherein the speech synthesis unit further comprises an audio isolation transformer, and the audio isolation transformer is configured to be connected in series between the operational amplification module and the speaker unit, and is configured to perform isolation processing on the amplified audio signal and transmit the audio signal to the speaker unit.

5. The audio playback device of claim 4, wherein the isolation process of the audio isolation transformer comprises performing power isolation by coil mutual inductance.

6. The audio playback device of claim 1, wherein the serial data communication interface is an RS232 or RS485 interface.

7. The audio playback device of claim 1, wherein the micro control unit is connected to the speech synthesis unit via a universal synchronous asynchronous receiver/transmitter.

8. The audio playback device of claim 1, wherein the character encoding is unicode in 16.

9. A method for playing audio, comprising:

receiving character codes through a serial data communication interface;

converting the character codes into text reading signals;

converting the text reading signal into an audio signal; and

and playing the audio signal.

10. The method of claim 9, further comprising:

amplifying the power of the converted audio signal; and

and performing isolation processing on the amplified audio signal for playing.

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