CN2726009Y - Sound transmission device for computer system - Google Patents

Abstract

The utility model relates to a computer system's stereo set transmission device, it includes: an interface connector, which can be coupled to a computer system, for receiving data or power; the sound source signal input socket is used for inputting an external sound source signal; an audio signal decoder coupled to the interface connector for receiving the data and decoding the data to generate an internal audio signal; a sound source signal selection circuit coupled to the sound source signal decoder and the sound source signal input socket for selecting and outputting the internal sound source signal or the external sound source signal; and a modulation circuit, coupled to the sound source signal selection circuit, for modulating the internal sound source signal or the external sound source signal into a radio frequency signal and outputting the radio frequency signal; and a pre-amplifier circuit coupled to the modulation circuit for amplifying the RF signal and outputting the amplified RF signal.

Description

Sound transmission device for computer system

technical field

The utility model relates to an audio transmission device, in particular to an audio system of a computer system which transmits data through a USB interface, processes the data and analog stereo sound source signals through frequency modulation and converts them into radio frequency signals, and then outputs them. transmission device.

Background technique

Most of the wireless audio source (Audio) products currently available on the market need to be equipped with a designated receiver, or only provide analog signal input. Alternatively, the compressed data stored in the memory can only be decompressed and modulated for output.

For example, the "Digital Music Player with FM Transmission Function" of China's approved announcement No. 02271938.5 patent (applied on July 19, 2002, and announced on July 9, 2003) provides a A digital music player, which includes a flash memory unit, a microprocessor unit, a decoding unit, a digital-to-analog conversion unit, an audio power amplifier unit, and a power supply unit, and also includes FM modulation and radio frequency modulation of the audio signal output by the digital-to-analog conversion unit. Amplify the FM radio transmitter unit for transmission. In this patent case, the compressed audio data in MP3 format or other formats stored in the flash memory unit is decoded, FM-modulated, and then output. However, this patent case can only decode and FM-modulate the compressed audio data in MP3 format or other formats stored in the flash memory unit, and cannot receive external audio source signals, or receive them through the USB interface of the computer system. The data is then decoded and output after FM modulation, which is really a fly in the ointment.

Therefore need a kind of sound transmission device of computer system, it transmits data by USB interface, and the sound transmission device of computer system that the data and analog stereo source signal are processed through FM modulation mode and converted into radio frequency signal output, with Improve the shortcomings of existing wireless audio source products.

Utility model content

One purpose of this utility model is to provide an audio transmission device for a computer system, which transmits data through a USB interface, and processes the data and analog stereo sound source signals through FM modulation and converts them into radio frequency signals and then outputs the computer system sound transmission device.

Another object of this utility model is to provide a computer system audio transmission method, which transmits data through the USB interface, and processes the data and analog stereo sound source signals through FM modulation and converts them into radio frequency signals and outputs them to the computer The sound transmission device of the system.

In order to achieve the above-mentioned purpose, the audio transmission device of the computer system of the present invention includes: an interface connector, which can be coupled to the computer system, for receiving data or power; an audio source signal input socket, for inputting an external audio source signal; an audio source signal A decoder, coupled to the interface connector, receives the data and decodes the internal audio signal accordingly; an audio signal selection circuit, coupled to the audio signal decoder and the audio signal input socket, is used to select the The internal audio source signal or the external audio source signal is output; and the modulation circuit is coupled to the audio source signal selection circuit, and the internal audio source signal or the external audio source signal can be modulated into a radio frequency signal and output; and a preamplifier circuit, It is coupled to the modulating circuit for amplifying the radio frequency signal and outputting it.

In order to further understand the structure, features and purpose of the present utility model, drawings and detailed descriptions of preferred specific embodiments are attached hereafter.

Description of drawings

FIG. 1 is a schematic diagram showing a block diagram of an audio transmission device of a computer system of the present invention.

Detailed ways

Please refer to FIG. 1 , which shows a schematic block diagram of the audio transmission device of the computer system of the present invention. As shown in the figure, the audio transmission device of the computer system of the present utility model includes: an interface connector 10; an audio source signal input socket 11; an audio source signal decoder 12; an audio source signal selection circuit 13; a modulation circuit 14; 15; and the combination of antenna 16.

Wherein, the interface connector 10 is, for example but not limited to, a USB interface connector, which can be coupled to a computer system (not shown in the figure) to receive data or power transmitted by the computer system through its USB interface. (USB interface can provide the DC power supply of 5V) to use for the audio transmission device of the present utility model; This sound source signal input socket 11 (Phone Jack) is the socket that is used for general input or output stereo sound source, by this socket 11 can Input an external audio source signal, such as but not limited to an external audio source signal output by a CD player or an MP3 player, to the audio transmission device of the present invention for modulation and output.

The sound source signal decoder 12 is coupled to the interface connector 10, and receives the output data of the interface connector 10 and decodes an internal sound source signal including left and right channel stereo sound sources. Therefore, the audio source signal decoder 12 of the present utility model can receive the data (preferably audio source signal) output by the computer system via the USB interface and decode the data into a stereo audio source output by the audio source signal decoder 12. In this way, the audio source signal to be played can be updated at any time through the USB interface of the computer system, so as to solve the shortcomings of the existing wireless audio source products.

The sound source signal selection circuit 13 is coupled to the sound source signal decoder 12 and the sound source signal input socket 11, which provides the user with a switch to select whether to output the internal sound source signal input by the computer system or the sound source signal from the sound source The external audio source signal input by the signal input socket 11 is output to provide greater convenience for users. Wherein, the frequency response range of the internal sound source signal and the external sound source signal is 20Hz˜15KHz.

The modulation circuit 14, such as but not limited to a frequency modulation (FM) modulation circuit, is coupled to the audio source signal selection circuit 13, and the internal audio source signal or the external audio source selected by the audio source signal selection circuit 13 can be output. The signal is modulated into an FM radio frequency signal and then output. Wherein, the frequency range of the FM modulation circuit 13 is 87.7MHz-88.9MHz, and its bandwidth is 200KHz.

The preamplifier circuit 15 is coupled to the modulation circuit 14 for amplifying the FM radio frequency signal and outputting it. In addition, the audio transmission device of the present invention may further include an antenna 16 coupled to the preamplifier circuit 15 so as to efficiently transmit the FM radio frequency signal.

As mentioned above, the audio transmission device of the present invention can not only directly obtain the 5V DC power from the USB interface connector, but also obtain the required DC power through an external power module 20 . Therefore, the user can listen to the audio signal output by the computer system or the audio signal output by the MP3 or CD player through the FM radio through the audio transmission device of the present utility model. Therefore, the disadvantages of wireless audio products can be solved.

Please refer to FIG. 1 again, the power module 20 of the present invention includes: a battery module 21 ; a DC conversion circuit 24 ; and an interface connector 25 .

Wherein, the battery module 21, which further has a battery holder 22 and at least one battery 23, can generate a first DC power supply, such as but not limited to a 3V DC power supply, wherein the battery 23 is for example but not limited to charging a 3A battery, and the number of the battery 23 is, for example but not limited to, two to generate a 3V DC power supply.

The DC conversion circuit 24 is coupled to the battery module 21 for converting the first DC power of 3V into a second DC power of, for example but not limited to, 5V.

The interface connector 25, such as but not limited to a USB interface connector, is coupled to the DC conversion circuit 24 and can be plugged into the interface connector 10 so as to output the 5V second DC power supply to the audio transmission device.

But when the power supply module 20 is plugged into the audio transmission device of the present invention via the interface connector 25, because the audio source signal cannot be obtained from the computer system, the audio source signal selection circuit 13 will be switched to the audio source signal input socket. 11 is turned on to output an external audio source signal, which is modulated into an FM radio frequency signal by the modulation circuit 14 and then amplified and output.

In addition, the utility model also provides a computer system audio transmission method, which includes the following steps: provide an interface connector 10 to couple to a computer system, and receive a data and a power; decode the data into a an internal sound source signal; modulating the internal sound source signal into a radio frequency signal and amplifying it for output; and transmitting the amplified radio frequency signal through an antenna 16 .

Therefore, through the implementation of the utility model, it transmits data through the USB interface, and processes the data and the analog stereo sound source signal through FM modulation and converts it into a radio frequency signal and then outputs it. The user can listen to the computer system through the FM radio. The output audio source signal or the audio source signal output by the MP3 or CD player, therefore, can solve the shortcomings of wireless audio source products.

What the utility model discloses is a preferred embodiment, for example, all partial changes or modifications derived from the technical idea of the utility model and easily deduced by those who are familiar with the art will not break away from the patent right of the utility model category.

Claims (10)

1. the audible transmission device of a computer system is characterized in that, comprising:

One interface connector is coupled to a computer system, in order to receive data and a power supply;

One sound source signal code translator is coupled to this interface connector, receive these data and according to this Xie Code go out an inner sound source signal;

One modulation circuit should become radiofrequency signal and output by inside sound source signal modulation;

One pre-amplification circuit is coupled to this modulation circuit, in order to radiofrequency signal is amplified back output; And

One antenna is coupled to this pre-amplification circuit, goes out so that will be somebody's turn to do through the emission of radio frequency signals of amplifying output.

2. the audible transmission device of computer system as claimed in claim 1 is characterized in that, described this device more comprises:

One sound source signal input socket is in order to import an external sound source signal;

One sound source signal is selected circuit, is coupled to this sound source signal code translator and this sound source signal input socket respectively, in order to select this inside sound source signal or this external sound source signal and to export this modulation circuit to.

3. the audible transmission device of computer system as claimed in claim 1 is characterized in that, described this interface connector is to be a usb interface connector, and this modulation circuit to be preferably be a frequency modulation modulation circuit.

4. the audible transmission device of computer system as claimed in claim 2 is characterized in that, described should the inside sound source signal and this external sound source signal to be preferably be a three-dimensional sound source signal.

5. the audible transmission device of computer system as claimed in claim 2 is characterized in that, further comprises a power module, and it is inserted in this interface connector and uses for this audible transmission device with supplying DC power source.

6. the audible transmission device of computer system as claimed in claim 5 is characterized in that, described this power module further comprises:

One battery module, it has a battery tray and at least one battery, can produce one first direct supply;

The stream translation circuit is coupled to this battery module always, in order to convert this first direct supply to one second direct supply; And

One interface connector is coupled to this DC converting circuit, in order to export this second direct supply to this audible transmission device.

7. the audible transmission device of computer system as claimed in claim 6 is characterized in that, it is a 3V direct supply that described this first direct supply is preferably, and it is a 5V direct supply that this second direct supply is preferably, and this battery to be preferably be a 3A rechargeable battery.

8. the audible transmission device of computer system as claimed in claim 6 is characterized in that, described this interface connector is to be a usb interface connector.

9. the audible transmission device of computer system as claimed in claim 2 is characterized in that, described should the inside sound source signal and the frequency response range of this external sound source signal be 20Hz～15KHz.

10. the audible transmission device of computer system as claimed in claim 3 is characterized in that, the frequency range of this frequency modulation modulation circuit is to be 87.7MHz～88.9MHz, and its frequency range is 200KHz.