Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and device for realizing FM digital-analog simulcast

A technology of digital-analog simulcasting and implementation method, applied in the field of broadcasting, can solve the problem of occupying radio frequency channel resources, and achieve the effect of reducing the occupation of radio frequency channel resources, good stability, and easy system debugging

Active Publication Date: 2016-12-21
BEIJING BBEF SCI & TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the process of realizing the present invention, the inventor found that: because the existing implementation of FM digital-analog simulcast is to first modulate the digital audio modulation signal to the radio frequency, and then perform power synthesis with the analog signal, that is, perform analog-to-digital simulcast in the radio frequency domain. Simulcast synthesis, therefore, this implementation requires two radio frequency channels, occupying limited radio frequency channel resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for realizing FM digital-analog simulcast
  • Method and device for realizing FM digital-analog simulcast
  • Method and device for realizing FM digital-analog simulcast

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment one, the realization method of FM digital-analog simulcast, the flow process of this method is as attached figure 2 shown.

[0041] figure 2 Among them, S100 receives analog audio signals and digital audio signals. The analog audio signal and the digital audio signal are signals that need to be FM digital-analog simulcast.

[0042] S110. Perform digital quantization processing on the received analog audio signal, so as to obtain an audio signal after digital quantization processing.

[0043] Specifically, timing sampling may be performed on the analog audio signal, and analog-to-digital conversion processing may be performed on the sampled signal. In practical applications, an analog-to-digital converter can be used to perform analog-to-digital conversion processing on the analog audio signal.

[0044] S120. Perform analog FM baseband modulation processing on the audio signal after digital quantization processing, so as to obtain an analog FM I channel ...

Embodiment 2

[0064] Embodiment 2: A device for realizing FM digital-analog simulcast. The structure of the device is attached as Figure 5 shown.

[0065] exist Figure 5 Among them, the realization device of FM digital-analog simulcast includes: receiving module 1, digital quantization module

[0066]2. Analog FM baseband modulation module 3 , digital audio signal baseband modulation module 4 , baseband signal synthesis module 5 and radio frequency modulation processing module 6 . Receiving module 1 is connected with digital quantization module 2 and digital audio signal baseband modulation module 4 respectively, digital quantization module 2 is also connected with analog FM baseband modulation module 3, and baseband signal synthesis module 5 is connected with analog FM baseband modulation module 3, digital audio signal The baseband modulation module 4 and the radio frequency modulation processing module 6 are respectively connected. The above analog FM baseband modulation module 3 , ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an implementing method and device for FM digital-analog simulcasting. The method comprises the steps that an analog audio signal and a digital audio signal are received; digital quantification is performed on the analog audio signal so that an audio signal after the digital quantification can be acquired; analog FM baseband modulation is performed on the audio signal after the digital quantification, baseband modulation is performed on the digital audio signal, and therefore an analog FM channel I signal, an analog FM channel Q signal, a digital audio channel I signal and a digital audio channel Q signal are acquired; signal combination is performed on the analog FM channel I signal, the analog FM channel Q signal, the digital audio channel I signal and the digital audio channel Q signal on a baseband to generate a composite baseband signal I and a composite baseband signal Q, wherein the composite baseband signals are orthogonal; RF modulation is performed on the composite baseband signals. According to the implementing method and device for FM digital-analog simulcasting, occupation of RF channel resources in the implementing process of FM digital-analog simulcasting is effectively reduced.

Description

technical field [0001] The invention relates to broadcast technology, in particular to a method for realizing FM digital-analog simulcast and a device for realizing FM digital-analog simulcast. Background technique [0002] FM (Frequency Modulation, FM) radio has become a popular application in society due to its high-quality sound quality and anti-interference performance. [0003] In order to improve the program quality of FM broadcasting, FM broadcasting is developing from traditional analog FM broadcasting to digital FM broadcasting. Compared with traditional analog FM radio, digital FM radio can effectively eliminate multipath effects, Doppler frequency shift effects, and sudden noise interference due to the use of digital transmission technology; in terms of sound quality, digital FM radio It can achieve sound quality close to CD; in terms of business, digital FM broadcasting can provide high-quality audio broadcasting programs and expand new data services. In the fu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04H20/48H04L25/03
Inventor 梁富林殷英龙平耿束建
Owner BEIJING BBEF SCI & TECH