CN202617332U - Network digital audio transmission board and audio network system - Google Patents

Abstract

The utility model provides a network digital audio transmission board and an audio network system. The network digital audio transmission board comprises an audio network board and a D/A conversion unit; the input terminal of the audio network board receives a network digital audio signal and the output terminal is connected with the input terminal of the D/A conversion unit. According to the utility model, the receiving of the digital audio signal is realized; therefore, the high quality of the sound source as well as stability during the network audio signal transmission process are ensured, the anti-interference performance is enhanced, and the sound quality effect is finally improved. The sound equipment can be used as a network terminal to carry out networking, so that the usage complexity and the transmission distance restriction of an audio cable are reduced, the application range of the sound equipment is extended, central management is realized conveniently, and usage demands of a hotel, an assembly hall, and an open-air square can be satisfied. Moreover, the transmission board also has a detection function and automatic switching between an ordinary analog signal input mode and a network digital signal input mode can be carried out according to signal detection; and the application can be carried out simply and flexibly.

Description

A kind of network digital audible transmission plate and audio network system

Technical field

The utility model relates to the sound technique field, relates in particular to a kind of network digital audible transmission plate and audio network system.

Background technology

In the market, sound equipment only can connect through tone frequency channel wire, receives simulated audio signal, and mainly there is following defective in the implementation of this pure analog signal input and output:

1) not only caused source of sound to be necessary for analog signal, and analog signal is subject to disturb in transport process, receives the line impedance influence of fading of length of transmission line bigger, make final acoustical quality difference and instability.

2) owing to must realize the analog signal input and output through tone frequency channel wire; Realization can not networking than between complicacy and the stereo set; Be subject to length of cable and transmission range, be difficult to centralized management, can not satisfy the user demand of big occasion such as hotel, assembly hall, open deck.

Thereby, be necessary to propose a solution.

Summary of the invention

The purpose of the utility model is to provide a kind of network digital audible transmission plate, realizes the input of digital audio and video signals, improves acoustical quality;

Another purpose of the utility model is to provide a kind of audio network system, realizes the networking function of audio frequency apparatus, satisfies the user demand in big place.

The purpose of the utility model realizes through following technical scheme.

A kind of network digital audible transmission plate comprises audio network plate and D/A converting unit, and the input of said audio network plate receives the network digital audio signal, output is connected with the input of D/A converting unit.

Wherein, also comprise single-chip microcomputer and SWTICH unit; Said single-chip microcomputer is connected respectively with the SWTICH unit with the audio network plate; Said SWTICH unit comprises two source of sound passage inputs, source of sound passage input be connected with the D/A converting unit with receive the network digital source of sound, a source of sound passage input receives pure simulation source of sound, detect automatically and switch by single-chip microcomputer.

Wherein, also integrated stabilized voltage power supply change-over circuit.

A kind of audio network system comprises a DAB matrix and N audio frequency apparatus, and N >=1 connects communication through Ethernet or DAB matrix between each audio frequency apparatus;

Be provided with network digital audible transmission plate in the said audio frequency apparatus, network digital audible transmission plate is embedded with interconnective audio network plate and D/A converting unit.

Wherein, said network digital audible transmission plate also comprises single-chip microcomputer and SWTICH unit;

Said single-chip microcomputer is connected respectively with the SWTICH unit with the audio network plate; Said SWTICH unit comprises two source of sound passage inputs, source of sound passage input be connected with the D/A converting unit receive the network digital source of sound, a source of sound passage input receives pure simulation source of sound, detect automatically and switch by single-chip microcomputer.

Wherein, said audio frequency apparatus is specially stereo set, microphone or power amplifier.

The utility model compared with prior art, beneficial effect is:

1) embedded audio network plate in the network digital audible transmission plate of the utility model; Realize the reception of digital audio and video signals through the audio network plate; Not only can guarantee high-quality, and guarantee the stability in the signal process of transmitting, improve interference free performance from source of sound; Finally improve acoustical quality, promoted the user experience effect.

2) owing to adopted the audio network plate; The audio frequency apparatus that the utility model proposes can carry out networking as the network terminal; The use complexity and the distance limit of tone frequency channel wire have not only been reduced; Be convenient to centralized management, and enlarged the scope of application of audio frequency apparatus, satisfied the user demand of hotel, assembly hall, open deck.

3) the utility model also has measuring ability, can carry out the automatic switchover of the digital signal input mode of common analog signal input mode and network according to input, uses simple and flexible.

Description of drawings

The structural representation of the network digital audible transmission plate that Fig. 1 provides for the utility model embodiment one;

The structural representation of the network digital audible transmission plate that Fig. 2 provides for the utility model embodiment two;

The audio frequency apparatus networking sketch map that Fig. 3 provides for the utility model embodiment.

Embodiment

The core concept of the utility model is: embedded audio network plate in network digital audible transmission plate, receiving network data carries out the input and output of digital signal, realizes the networking function of audio frequency apparatus simultaneously.

For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Embodiment one

See also shown in Figure 1ly, network digital audible transmission plate mainly comprises in the present embodiment: and the audio network plate (Cobranet, CB), D/A converting unit, stabilized voltage power supply change-over circuit.Wherein, digital audio and video signals, the output of the input of audio network plate reception network are connected to the input of D/A converting unit.

Its operation principle is: through the reception of audio network plate digital audio and video signals, receive and it is carried out digital-to-analogue conversion behind the digital audio and video signals and export.Like this, realized the reception of digital audio and video signals.

When using; As shown in Figure 3; Because the audio network plate can receive the network digital signal, thereby can the audio frequency apparatus that adopt above-mentioned network digital audible transmission plate be carried out networking as network-termination device, communicates through Ethernet or DAB matrix between the different audio frequency apparatuses.

Embodiment two

See also shown in Figure 2ly, be that with the difference part of embodiment one network digital audible transmission plate has kept common analog signal input mode in the present embodiment, increased single-chip microcomputer and SWITCH unit.

The SWTICH unit comprises two source of sound passage inputs; A source of sound passage input is connected with the D/A converting unit to receive network digital source of sound, a source of sound passage input reception difference balance simulation signal (being pure simulation source of sound), is detected automatically and switching by single-chip microcomputer.

Single-chip microcomputer is connected respectively with audio network plate and SWITCH unit, in order to the measuring ability of realization digital audio and video signals, and combines the SWITCH unit to realize the handoff functionality of figure pattern and simulation model.

The concrete course of work is: the SWITCH unit receives difference balance simulation signal under the acquiescence mode, and exports it to audio amplifier broadcast, and single-chip microcomputer detects the audio network plate in real time simultaneously; When detecting the audio network plate and receive the network digital signal, transmitting control signal to the SWITCH unit switches to figure pattern with notice SWITCH unit; After switching to figure pattern, the audio network plate receives the network digital signal, carries out exporting the SWITCH unit to after digital-to-analogue conversion is handled through the D/A converting unit, and the SWITCH unit is exported differential analog signal to audio amplifier again and play.

In like manner; Present embodiment sound intermediate frequency equipment also can adopt mode shown in Figure 3 to carry out networking; The audio frequency apparatus that has adopted above-mentioned network digital audible transmission plate is carried out networking as network-termination device, communicate through Ethernet or DAB matrix between the different audio frequency apparatuses.

In the present embodiment, the type of audio frequency apparatus does not limit, can be for various audio signal input-output equipment, such as stereo set, microphone, power amplifier or the like, as long as when using, adopt aforesaid network digital audible transmission plate.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.

Claims (6)

1. network digital audible transmission plate; It is characterized in that; This network digital audible transmission plate comprises audio network plate and D/A converting unit, and the input of said audio network plate receives the network digital audio signal, output is connected with the input of D/A converting unit.

2. network digital audible transmission plate as claimed in claim 1 is characterized in that, also comprises single-chip microcomputer and SWTICH unit; Said single-chip microcomputer is connected respectively with the SWTICH unit with the audio network plate; Said SWTICH unit comprises two source of sound passage inputs, source of sound passage input be connected with the D/A converting unit with receive the network digital source of sound, a source of sound passage input receives pure simulation source of sound, detect automatically and switch by single-chip microcomputer.

3. network digital audible transmission plate as claimed in claim 2 is characterized in that, also integrated stabilized voltage power supply change-over circuit.

4. an audio network system is characterized in that, comprises a DAB matrix and N audio frequency apparatus, and N >=1 connects communication through Ethernet or DAB matrix between each audio frequency apparatus;

Be provided with network digital audible transmission plate in the said audio frequency apparatus, network digital audible transmission plate is embedded with interconnective audio network plate and D/A converting unit.

5. audio network system as claimed in claim 4 is characterized in that, said network digital audible transmission plate also comprises single-chip microcomputer and SWTICH unit;

Said single-chip microcomputer is connected respectively with the SWTICH unit with the audio network plate; Said SWTICH unit comprises two source of sound passage inputs, source of sound passage input be connected with the D/A converting unit receive the network digital source of sound, a source of sound passage input receives pure simulation source of sound, detect automatically and switch by single-chip microcomputer.

6. audio network system as claimed in claim 4 is characterized in that said audio frequency apparatus is specially stereo set, microphone or power amplifier.

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