CN201868097U - Digital audio frequency decoder - Google Patents

The utility model discloses a digital audio frequency decoder comprising a DSP (Digital Signal Processor), the DSP is accessed to four paths of AES (Advanced Encryption Standard) receivers, each path of the AES receiver receives signals through an isolating module, the DSP outputs signals through four paths of digital audio frequency DACs (Digital Analog Converter) and a magnification processing circuit, and a main-control MCU (Microprogrammed Control Unit) processor is in two-way communication with the DSP. The decoder has a good decoding effect, and the data has low probability of distortion.

The digital audio decoding device

Technical field

The utility model relates to field of broadcast televisions, and especially radio and television sound intermediate frequency decoding device is specially a kind of digital audio decoding device.

Background technology

Radio and television are modern important medium means, and it generally is by radiowave or broadcasts the communication media of sound equipment, image programs by lead to wide geographic area.In the audio signal transmission process of radio and television, in order to improve transfer efficiency, generally need become the numerical coding file to the audio signal compression of simulation, this adopts the digital audio decoding device that the file of compressed encoding is decoded with regard to needing.The easy distortion of digital audio decoding device decoding back data of prior art, signal to noise ratio (S/N ratio) is lower, and decoding effect is poor.

The utility model content

The purpose of this utility model provides a kind of digital audio decoding device, with the problem of the digital audio decoding device decoding effect difference that solves prior art.

In order to achieve the above object, the technical scheme that the utility model adopted is:

The digital audio decoding device, include DSP, it is characterized in that: the input end of described DSP has access to four road AES receivers, the input end of every road AES receiver all is connected to isolation module separately, by the isolation module received signal, the output terminal of described DSP is connected to four way word audio frequency DAC, the output terminal of described DAB DAC is connected to output signal behind the amplification treatment circuit separately, the power end of described DSP has access to power supply chip, DSP also has access to the pll clock source, also include the main control MCU processor, described main control MCU processor is connected with the DSP both-way communication.

Described DAB transcoder is characterized in that: described main control MCU processor is circumscribed with LCD LCD and keyboard.

The utility model is by isolation module, AES receiver received signal, the low noise purpose of isolation module landing, after DSP carries out decoding processing to signal, by DAB DAC, amplification treatment circuit output, amplification treatment circuit amplifies, further improved signal to noise ratio (S/N ratio), can set the parameter among the DSP by the main control MCU processor, and can implement monitoring parameter by the LCD LCD.The utility model decoding effect is good, and data are difficult for distortion.

Description of drawings

Fig. 1 is the utility model schematic block circuit diagram.

Embodiment

As shown in Figure 1.The digital audio decoding device, include DSP, the input end of DSP has access to four road AES receivers, the input end of every road AES receiver all is connected to isolation module separately, by the isolation module received signal, the output terminal of DSP is connected to four way word audio frequency DAC, the output terminal of DAB DAC is connected to output signal behind the amplification treatment circuit separately, the power end of DSP has access to power supply chip, DSP also has access to the pll clock source, also include the main control MCU processor, the main control MCU processor is connected with the DSP both-way communication, and the main control MCU processor is circumscribed with LCD LCD and keyboard.