CN107331401A - The player method of broadcast terminal and broadcasted content - Google Patents

Abstract

The present invention provides a broadcast terminal and a method for playing broadcast content, wherein the broadcast terminal includes: a control unit with multiple board interfaces; multiple audio decoder boards with too many audio decoder boards A board interface is electrically connected with the control unit; the first audio processing unit, the first input end of the first audio processing unit is electrically connected with the audio output end of the control unit, and the output end of the first audio processing unit is connected with the input end of the pronunciation device Electrical connection: the power supply unit is electrically connected to the first port of the control unit and the second input end of the first audio processing unit respectively, which can reduce the cost of broadcast terminals supporting multiple transmission modes while improving the support for multiple transmission modes. The playback effect of the broadcast terminal in this transmission mode.

Description

Broadcast terminal and method for playing broadcast content

technical field

The invention relates to the technical field of broadcasting, in particular to a broadcasting terminal and a method for playing broadcasting content.

Background technique

In the field of broadcasting technology, audio signals, as a streaming media signal, have various transmission modes. One or more transmission modes may exist in the same broadcast terminal. Usually, after the type of broadcast terminal is determined, it is necessary to design circuits and write programs for the transmission mode used in the product design and development process, and when the application scenario and customer needs change, the above transmission modes may need to be replaced or recombined to Generate a new form of broadcast terminal. In the past, when the transmission mode or combination mode adopted by the broadcasting terminal changes, the circuit layout needs to be re-changed to meet the new market demand, resulting in a lot of duplication of labor, which in turn leads to a longer development time and increased cost of the broadcasting terminal.

At present, broadcast terminals that support multiple transmission modes are generally composed of multiple audio decoding boards, and each audio decoding board operates independently, causing each audio decoding board to transmit broadcasting to the pronunciation device independently when receiving broadcast content. content, so that the pronunciation device may receive multiple broadcast contents at the same time, which can easily cause playback disorder and affect the playback effect.

To sum up, at present, broadcast terminals supporting multiple transmission modes are expensive and have poor playback effects.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a broadcast terminal and a method for playing broadcast content, so as to solve the problems of high cost and poor playback effect of broadcast terminals supporting multiple transmission modes.

In order to achieve the above purpose, an embodiment of the present invention provides a broadcast terminal, including:

A control unit, the control unit is provided with a plurality of board interfaces;

Multiple audio decoding boards, multiple audio decoding boards are electrically connected to the control unit through multiple board interfaces;

A first audio processing unit, the first input end of the first audio processing unit is electrically connected to the audio output end of the control unit, and the output end of the first audio processing unit is electrically connected to the input end of the pronunciation device;

The power supply unit is electrically connected to the first port of the control unit and the second input terminal of the first audio processing unit respectively.

Wherein, the broadcast terminal further includes: a security unit, the first port of the security unit is electrically connected to the second port of the control unit.

Wherein, the broadcast terminal also includes: at least one level of second audio processing unit, the output end of each level of second audio processing unit is electrically connected to the input end of the pronunciation device, and the first input end of each level of second audio processing unit They are all electrically connected to the power supply unit, wherein at least one level of second audio processing units are serially connected in series, and the second input end of the first level of second audio processing units in the at least one level of second audio processing units is connected to the first audio processing unit The output terminals are electrically connected.

Among them, the power supply unit includes:

A first safety protection circuit, the input end of the first safety protection circuit is electrically connected to the first AC power supply;

The first AC-to-DC circuit, the input end of the first AC-to-DC circuit is electrically connected to the output end of the first safety protection circuit, the output end of the first AC-to-DC circuit is respectively connected to the first port of the control unit and the first audio processing The second input of the unit is electrically connected.

Among them, the power supply unit includes:

The first step-down circuit, the input end of the first step-down circuit is electrically connected to the first DC power supply, the output end of the first step-down circuit is respectively connected to the first port of the control unit and the second input end of the first audio processing unit electrical connection.

Among them, the power supply unit includes:

A second safety protection circuit, the input end of the second safety protection circuit is electrically connected to the second AC power supply;

A second AC-to-DC circuit, the input end of the second AC-to-DC circuit is electrically connected to the output end of the second safety protection circuit;

An AC input detection circuit, the input end of the AC input detection circuit is electrically connected to the output end of the second AC to DC circuit;

A second step-down circuit, the input end of the second step-down circuit is electrically connected to the second DC power supply;

A DC input detection circuit, the input terminal of the DC input detection circuit is electrically connected to the output terminal of the second step-down circuit;

An input switching circuit, the first input end of the input switching circuit is electrically connected to the output end of the AC input detection circuit, and the second input end of the input switching circuit is electrically connected to the output end of the DC input detection circuit;

The third step-down circuit, the input end of the third step-down circuit is electrically connected to the output end of the input switching circuit, the output end of the third step-down circuit is respectively connected to the first port of the control unit and the second input of the first audio processing unit electrical connection.

Embodiments of the present invention also provide a method for playing broadcast content, which is applied to the above-mentioned broadcast terminal, and the method for playing includes:

receiving a first broadcast message sent by a first audio decoder board among the plurality of audio decoder boards, where the first broadcast message includes the first broadcast content and the first priority of services carried by the first audio decoder board;

Detecting whether the broadcast terminal is currently playing the second broadcast content of the second broadcast message, the second broadcast message is sent by the second audio decoder board in the plurality of audio decoder boards, and the second broadcast message also includes the second audio decoding The second priority of the business carried by the board;

If the broadcast terminal is currently playing the second broadcast content of the second broadcast message, then comparing the first priority with the second priority;

If the first priority is higher than the second priority, then pause the playing of the second broadcast content and play the first broadcast content.

Wherein, after the step of playing the first broadcast content, the playing method further includes:

When it is detected that the playing of the first broadcast content ends, the playing of the second broadcast content is resumed.

Wherein, after the step of detecting whether the broadcast terminal is currently playing the second broadcast content of the second broadcast message, the playing method further includes:

If the broadcast terminal does not currently play the second broadcast content of the second broadcast message, it directly plays the first broadcast content.

Wherein, after the step of comparing the first priority with the second priority, the playing method also includes:

If the first priority is lower than the second priority, continue to play the second broadcast content, and play the first broadcast content after the second broadcast content is played.

Above-mentioned scheme of the present invention comprises following beneficial effect at least:

In the embodiment of the present invention, since a plurality of audio decoding boards can be electrically connected to the control unit through a plurality of board interfaces, the broadcasting terminal can quickly assemble a plurality of audio decoding boards through the control unit, so that the broadcasting terminal It supports multiple transmission modes to achieve the effect of reducing the cost of broadcast terminals supporting multiple transmission modes. At the same time, since multiple audio decoding boards are electrically connected to the control unit, each audio decoding board is connected to the first audio frequency through the control unit. The processing unit transmits the broadcast content to the pronunciation device, so that the pronunciation device plays the broadcast content in an orderly manner, and improves the playback effect of the broadcast terminal supporting multiple transmission modes.

Description of drawings

FIG. 1 is a schematic structural diagram of a broadcast terminal in a specific embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a control unit in an embodiment of the present invention;

3 is a schematic structural diagram of a power supply unit in an embodiment of the present invention;

Fig. 4 is a flowchart of a method for playing broadcast content in an embodiment of the present invention.

Explanation of reference signs:

1. Control unit; 2. Audio decoder board; 3. First audio processing unit; 4. Power supply unit; 5. Pronunciation device; 6. Second audio processing unit; 7. Security unit; 8. Processing unit; 9. Multiplexer; 10. Second safety protection circuit; 11. Second AC power supply; 12. Second AC to DC circuit; 13. AC input detection circuit; 14. Second step-down circuit; 15. Second DC power supply ; 16, DC input detection circuit; 17, input switching circuit; 18, the third step-down circuit.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

As shown in Figure 1, the specific embodiment of the present invention provides a kind of broadcasting terminal, comprises: control unit 1, is provided with a plurality of board interfaces on the control unit 1; Multiple audio decoding boards 2, a plurality of audio decoding boards The card 2 is electrically connected to the control unit 1 through a plurality of board interfaces; the first audio processing unit 3, the first input end of the first audio processing unit 3 is electrically connected to the audio output end of the control unit 1, and the first audio processing unit 3 The output end of the power supply unit 4 is electrically connected to the input end of the pronunciation device 5; the power supply unit 4 is electrically connected to the first port of the control unit 1 and the second input end of the first audio processing unit 3 respectively.

Wherein, in a specific embodiment of the present invention, the above-mentioned audio decoding board 2 is mainly used to receive an audio signal sent by an external audio signal source (the audio signal may be an audio signal transmitted through an IP protocol, an audio signal transmitted through a wireless communication , an audio signal transmitted through FM or an audio signal transmitted through a transport stream (TS, Transport Stream), and the signal is decoded to obtain an analog audio signal. And each of the above-mentioned audio decoding boards 2 corresponds to a transmission mode, so that the broadcasting terminal supports multiple transmission modes. Specifically, in a specific embodiment of the present invention, the above-mentioned multiple audio decoding boards 2 include: Internet Protocol (IP, Internet Protocol) decoding boards interconnected between networks, wireless communication decoding boards (such as fourth-generation mobile Telephone mobile communication standard (4G) decoding board), FM decoding board and TS decoding board, satellite receiving board, Bluetooth board, wireless fidelity (WIFI, Wireless Fidelity) board, etc. It should be noted that the above-mentioned audio decoding boards 2 are all independent circuit boards, which are easy to install and disassemble. It should be further explained that, the specific structure of the above-mentioned audio decoding board 2 can be realized by using the existing simple structure. In addition, it is worth integrating that under special circumstances, there may be two audio decoder boards with the same transmission mode in the above-mentioned multiple audio decoder boards 2, so that for audio decoder boards with the same transmission mode, when one of them fails , another audio decoder board can be used.

Wherein, in a specific embodiment of the present invention, the control unit 1 can output the analog audio signals output by a plurality of audio decoding boards 2 to the first audio processing unit 3, so that the first audio processing unit 3 processes the audio signals ( Such as noise reduction, etc.) and amplification operations, so that the subsequent pronunciation device 5 can play clear audio. Wherein, as an example here, the above-mentioned pronunciation device 5 may be a power amplifier speaker, so as to quickly play audio signals.

Wherein, in the specific embodiment of the present invention, as shown in Figure 2, above-mentioned control unit comprises: processing unit 8; Multiplexer 9, the first input end of multiplexer 9 and the first port of processing unit 8 electrical connection. Wherein, the second port of the above-mentioned processing unit 8 is provided with a plurality of board interfaces, the third port of the processing unit 8 and the second input end of the multiplexer 9 are all electrically connected with the above-mentioned power supply unit 4, and the multiplexer The output terminal of 9 is electrically connected with the first input terminal of the first audio processing unit.

Wherein, in a specific embodiment of the present invention, the above-mentioned processing unit 8 can output the analog audio signals output by a plurality of audio decoding boards to the multiplexer 9, and the multiplexer 9 can receive the multiple analog audio signals One analog audio signal among the audio signals is output to the first audio processing unit. In addition, the above-mentioned processing unit 8 can also configure parameters for the audio decoding board through the board interface (the configuration parameters refer to the parameters that enable the audio decoding board to work normally, such as operating frequency points, etc.), that is, the pre-stored configuration parameters of the processing unit 8 Output to the audio decoder board through the board interface. It should be noted that, the specific structure of the above processing unit 8 can be realized by using an existing simple structure. Here, as an example, the above-mentioned processing unit 8 may be a central processing unit. It should be further explained that, in order to facilitate the assembly of the broadcasting terminal, in actual use, the above control unit can be made into an independent circuit board.

Wherein, in a specific embodiment of the present invention, the above broadcast terminal further includes: a security unit 7, the first port of the security unit 7 is electrically connected to the second port of the control unit.

Wherein, in a specific embodiment of the present invention, since the broadcast terminal can access the Internet to work, it is necessary to ensure the security of the broadcast terminal. Specifically, in addition to mechanisms such as software security transmission guarantees, the broadcast terminal can also perform hardware encryption. Therefore, when the control unit receives the encrypted audio signal, the control unit can output the audio signal to the security unit 7, so that the security unit 7 can decrypt the audio signal, and output the decrypted audio signal to the control unit , and the control unit will output the decrypted audio signal to the first audio processing unit, so that the audio signal can be played normally. It should be noted that, the specific structure of the above-mentioned safety unit 7 can be realized by using an existing simple structure.

Among them, in a specific embodiment of the present invention, the above-mentioned first audio processing unit is mainly used for processing (such as noise reduction, etc.) The first audio processing unit can realize higher power output by cascading other audio processing units.

Specifically, in a specific embodiment of the present invention, the above broadcast terminal further includes: at least one level of second audio processing unit 6, the output end of each level of second audio processing unit 6 is electrically connected to the input end of the pronunciation device, The first input end of each level of second audio processing unit 6 is electrically connected to the power supply unit, wherein at least one level of second audio processing units 6 are connected in series in sequence, and the first level of at least one level of second audio processing units 6 The second input end of the second audio processing unit 6 is electrically connected to the output end of the first audio processing unit.

Wherein, in the specific embodiment of the present invention, the number of the above-mentioned second audio processing units 6 is not limited. And the quantity of the second audio processing unit 6 can be adjusted according to the actual power demand. It should be noted that the above-mentioned first audio processing unit 3 and each second audio processing unit 6 work in cascade without affecting each other. And as an example, both the above-mentioned first audio processing unit and the second audio processing unit 6 may be audio power amplifiers.

Wherein, in a specific embodiment of the present invention, the above-mentioned power supply unit is mainly used to supply various components of the broadcast terminal (such as the audio decoding board 2, the control unit 1, the first audio processing unit 3, the second audio processing unit 6, the security unit 7, etc.) to provide the operating voltage. It should be noted that the power supply unit 4 can provide working voltage to the audio decoding board 2 and the security unit 7 through the control unit 1 .

Wherein, in a specific embodiment of the present invention, in actual use, the above-mentioned power supply unit may use AC alone, or DC alone, or both AC and DC at the same time.

Wherein, when the power supply unit uses AC alone, the power supply unit includes: a first safety protection circuit, the input end of the first safety protection circuit is electrically connected to the first AC power supply; a first AC to DC circuit, a first AC to DC circuit The input end of the first safety protection circuit is electrically connected to the output end of the first AC-to-DC circuit, and the output end of the first AC-to-DC circuit is respectively electrically connected to the first port of the control unit and the second input end of the first audio processing unit.

Wherein, the above-mentioned first AC power supply may be 220 volts mains, and the above-mentioned first safety protection circuit is mainly used for lightning protection and anti-surge, and the first AC-to-DC circuit is mainly used for converting AC power into DC power. It should be noted that, the specific structures of the above-mentioned first safety protection circuit and the first AC-to-DC circuit can be realized by using existing simple structures.

Wherein, when the power supply unit uses DC alone, the power supply unit includes: a first step-down circuit, the input end of the first step-down circuit is electrically connected to the first DC power supply, and the output end of the first step-down circuit is respectively connected to the control unit The first port of the first audio processing unit is electrically connected with the second input end of the first audio processing unit.

Wherein, the above-mentioned first DC power supply may be a DC power supply such as a battery or a solar power supply, and the above-mentioned first step-down circuit is mainly used to reduce the output voltage of the first DC power supply to provide safe working voltage for each component of the broadcasting terminal. It should be noted that the specific structure of the above-mentioned first step-down circuit can be realized by using an existing simple structure.

Wherein, when the power supply unit uses AC and DC at the same time, as shown in Figure 3, the above-mentioned power supply unit includes: a second safety protection circuit 10, the input end of the second safety protection circuit 10 is electrically connected to the second AC power supply 11; AC to DC circuit 12, the input end of the second AC to DC circuit 12 is electrically connected to the output end of the second safety protection circuit 10; AC input detection circuit 13, the input end of the AC input detection circuit 13 is connected to the second AC to DC circuit The output end of 12 is electrically connected; the second step-down circuit 14, the input end of the second step-down circuit 14 is electrically connected with the second DC power supply 15; the DC input detection circuit 16, the input end of the DC input detection circuit 16 is connected with the second step-down circuit The output end of voltage circuit 14 is electrically connected; Input switching circuit 17, the first input end of input switching circuit 17 is electrically connected with the output end of AC input detection circuit 13, the second input end of input switching circuit 17 is connected with DC input detection circuit 16 The output end of the third step-down circuit 18 is electrically connected with the output end of the input switching circuit 17, and the output end of the third step-down circuit 18 is connected with the first port of the control unit respectively. It is electrically connected with the second input terminal of the first audio processing unit.

Wherein, the above-mentioned second AC power supply 11 can be 220 volts of commercial power, and the above-mentioned second safety protection circuit 10 is mainly used for lightning protection and anti-surge, and the second AC-to-DC circuit 12 is mainly used for converting AC power into DC power, The second DC power supply 15 can be a DC power supply such as a battery or a solar power supply. The above-mentioned second step-down circuit 14 is mainly used to reduce the output voltage of the second DC power supply 15. The above-mentioned AC input detection circuit 13 is mainly used to detect the second AC to DC Whether the circuit 12 has current output, and output the detection result to the input switching circuit 17, the above-mentioned DC input detection circuit 16 is mainly used to detect whether the second step-down circuit 14 has current output, and output the detection result to the input switching circuit 17, The above-mentioned input switching circuit 17 is mainly used to output the current output by the AC input detection circuit 13 to the third step-down circuit 18 when the second AC-to-DC circuit 12 has current output, and when the second AC-to-DC circuit 12 has no current When outputting, the current output by the DC input detection circuit 16 is output to the third step-down circuit 18 (that is, the AC power is used when there is an AC power, and the DC power is used when there is no AC power to ensure the normal operation of the broadcasting terminal). The above-mentioned third step-down circuit 18 is mainly used to reduce the output voltage of the input switching circuit 17 to provide safe working voltage for each component of the broadcasting terminal. And it should be noted that the above-mentioned second safety protection circuit 10, second AC to DC circuit 12, AC input detection circuit 13, second step-down circuit 14, DC input detection circuit 16, input switching circuit 17, third step-down The specific structure of the circuit 18 can be realized by using existing simple structures.

In addition, in the specific embodiment of the present invention, it is worth mentioning that the multiple board interfaces on the above-mentioned control unit are multiple unified standard interfaces, that is, the size and type of each board interface are the same, and each board The card interface can be connected to any mode of audio decoding board, but one board interface can only be connected to one audio decoding board at the same time, that is, when multiple audio decoding boards are electrically connected to the control unit through multiple board interfaces, The number of audio decoding boards and board interfaces corresponds one-to-one to ensure that the broadcast terminal can support multiple transmission modes.

It can be seen that, in a specific embodiment of the present invention, since multiple audio decoding boards can be electrically connected to the control unit through multiple board interfaces, the broadcast terminal can quickly assemble multiple audio decoding boards through the control unit , so that the broadcasting terminal supports multiple transmission modes, and achieves the effect of reducing the cost of the broadcasting terminal supporting multiple transmission modes. At the same time, since multiple audio decoding boards are electrically connected to the control unit, each audio decoding board is controlled by The unit and the first audio processing unit transmit the broadcast content (that is, the audio signal output by the audio decoder board) to the pronunciation device, so that the pronunciation device plays the broadcast content in an orderly manner, and improves the playback effect of the broadcast terminal that supports multiple transmission modes.

In addition, as shown in FIG. 4, a specific embodiment of the present invention also provides a method for playing broadcast content, which is applied to the above-mentioned broadcast terminal, and the playback method includes:

Step 401: Receive a first broadcast message sent by a first audio decoding board among multiple audio decoding boards.

Wherein, the above-mentioned first broadcast message includes the first broadcast content and the first priority of the services carried by the first audio decoding board. Of course, for the convenience of identifying the first audio decoding board, the first broadcast message may also include the first type of service carried by the first audio decoding board.

Step 402, detecting whether the broadcast terminal is currently playing the second broadcast content of the second broadcast message, the second broadcast message is sent by the second audio decoder board among the multiple audio decoder boards, and the second broadcast message also includes the first The second priority of the service carried by the audio decoding board.

Wherein, for the convenience of identifying the second audio decoding board, the second broadcast message sent by the second audio decoding board may further include the second type of service carried by the second broadcast message.

Step 403: If the broadcast terminal is currently playing the second broadcast content of the second broadcast message, compare the first priority with the second priority.

Wherein, in a specific embodiment of the present invention, after performing the above step 402, the above playing method further includes the following steps: if the broadcast terminal is not currently playing the second broadcast content of the second broadcast message, directly play the first broadcast content , that is, if the current broadcast terminal is in an idle state, the first broadcast content is played directly.

Wherein, in a specific embodiment of the present invention, after performing the above step 403, the above playing method further includes the following steps: if the first priority is lower than the second priority, continue to play the second broadcast content, and After the second broadcast content is played, the first broadcast content is played.

Step 404, if the first priority is higher than the second priority, pause the playing of the second broadcast content and play the first broadcast content.

Wherein, in a specific embodiment of the present invention, after the above step 404 is performed, the playing method further includes the following step: when it is detected that the playing of the first broadcast content ends, resuming the playing of the second broadcast content.

That is, in a specific embodiment of the present invention, the broadcast terminal can give priority to playing the broadcast content with high priority, and can automatically resume playing the broadcast content with low priority when the broadcast content with high priority ends, so that the broadcast Terminals meet actual needs and improve user experience.

It should be noted that, in a specific embodiment of the present invention, the execution subject of the above playing method may be the control unit of the broadcast terminal. And in a specific embodiment of the present invention, a priority can be configured for the services carried by each audio decoder board of the broadcast terminal according to customer needs, and stored in the corresponding audio decoder board, so that the broadcast terminal can meet the needs of customers. need. In addition, in order to facilitate the installation of the broadcasting terminal, the above-mentioned control unit and each audio decoding board can be made in the form of an independent circuit board.

It can be seen that in a specific embodiment of the present invention, since the broadcast terminal receives the first broadcast message sent by the first audio decoder board, it will detect whether the broadcast terminal is currently playing the second broadcast message sent by the second audio decoder board. The second broadcast content of the message, and when the broadcast terminal is currently playing the second broadcast content of the second broadcast message, compare the priorities of the services carried by the first audio decoder board and the second audio decoder board, and finally play the service first The broadcast content corresponding to the higher-level audio decoding board, and after the content is played, the broadcast content corresponding to the lower-priority audio decoding board is played, so that the pronunciation equipment of the broadcasting terminal plays the broadcasting content in an orderly manner, improving the quality of broadcasting. The playback effect of the terminal. In addition, since multiple audio decoder boards are electrically connected to the control unit, they can be quickly assembled in the broadcast terminal, enabling the broadcast terminal to support multiple transmission modes, thereby achieving the effect of reducing the cost of the broadcast terminal supporting multiple transmission modes.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. a kind of broadcast terminal, it is characterised in that including：

Control unit, described control unit is provided with multiple board interfaces；

Multiple audio decoder boards, the multiple audio decoder board passes through the multiple board interface and described control unit electricity Connection；

First audio treatment unit, the first input end of first audio treatment unit and the audio output of described control unit End electrical connection, the output end of first audio treatment unit is electrically connected with the input of pronunciation equipment；

Power supply unit, the first port and first audio treatment unit respectively with described control unit of said supply unit The second input electrical connection.

2. broadcast terminal according to claim 1, it is characterised in that the broadcast terminal also includes：Safe unit, it is described The first port of safe unit is electrically connected with the second port of described control unit.

3. broadcast terminal according to claim 1, it is characterised in that the broadcast terminal also includes：At least one-level second Audio treatment unit, input of the output end of the second audio treatment unit with the pronunciation equipment is electrically connected described in per one-level Connect, electrically connected per the first input end of the second audio treatment unit described in one-level with said supply unit, wherein, it is described at least The audio treatment unit of one-level second is sequentially connected in series, and the audio of the first order second in the audio treatment unit of at least one-level second Second input of processing unit is electrically connected with the output end of first audio treatment unit.

4. broadcast terminal according to claim 1, it is characterised in that said supply unit includes：

First safety protection circuit, the input of first safety protection circuit is electrically connected with the first AC power；

First AC to DC converter circuit, the input of first AC to DC converter circuit and first safety protection circuit Output end is electrically connected, the output end of first AC to DC converter circuit respectively with the first port of described control unit with it is described The second input electrical connection of first audio treatment unit.

5. broadcast terminal according to claim 1, it is characterised in that said supply unit includes：

First reduction voltage circuit, the input of first reduction voltage circuit is electrically connected with the first dc source, the first decompression electricity The output end on road is electrically connected with the first port and the second input of first audio treatment unit of described control unit respectively Connect.

6. broadcast terminal according to claim 1, it is characterised in that said supply unit includes：

Second safety protection circuit, the input of second safety protection circuit is electrically connected with the second AC power；

Second AC to DC converter circuit, the input of second AC to DC converter circuit and second safety protection circuit Output end is electrically connected；

Input detecting circuit is exchanged, the input of the exchange input detecting circuit is defeated with second AC to DC converter circuit Go out end electrical connection；

Second reduction voltage circuit, the input of second reduction voltage circuit is electrically connected with the second dc source；

Direct current input detecting circuit, the output end electricity of the input of the direct current input detecting circuit and second reduction voltage circuit Connection；

Input-switching circuit, the first input end of the input-switching circuit and the output end electricity for exchanging input detecting circuit Connection, the second input of the input-switching circuit is electrically connected with the output end of the direct current input detecting circuit；

3rd reduction voltage circuit, the input of the 3rd reduction voltage circuit is electrically connected with the output end of the input-switching circuit, institute State the of the output end of the 3rd reduction voltage circuit respectively with the first port of described control unit and first audio treatment unit Two inputs are electrically connected.

7. a kind of player method of broadcasted content, applied to the broadcast terminal as described in any one of claim 1 to 6, its feature It is, the player method includes：

The first broadcast message that the first audio decoder board in multiple audio decoder boards is sent is received, first broadcast disappears Breath includes the first broadcasted content, and the first audio decoder board institute bearer service the first priority；

Detect that broadcast terminal is current and whether playing the second broadcasted content of the second broadcast message, second broadcast message is many What the second audio decoder board in individual audio decoder board was sent, and second broadcast message also includes second audio Decode the second priority of board institute bearer service；

If the broadcast terminal is current to play the second broadcasted content of the second broadcast message, to first priority and institute The second priority is stated to be compared；

If first priority is higher than second priority, suspend the broadcasting of second broadcasted content, and play institute State the first broadcasted content.

8. player method according to claim 7, it is characterised in that the step of the broadcasting first broadcasted content Afterwards, the player method also includes：

At the end of the first broadcasted content broadcasting is detected, recover the broadcasting of second broadcasted content.

9. player method according to claim 7, it is characterised in that current whether in broadcasting in the detection broadcast terminal After the step of second broadcasted content of the second broadcast message, the player method also includes：

If the broadcast terminal does not play the second broadcasted content of the second broadcast message currently, first broadcast is directly played Content.

10. player method according to claim 7, it is characterised in that described to first priority and described the After the step of two priority are compared, the player method also includes：

If first priority is less than second priority, continue to play second broadcasted content, and described the The broadcasting of two broadcasted contents plays first broadcasted content after terminating.