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Method and device for analyzing digital audio broadcasting signals

A technology of digital audio broadcasting and analysis method, which is applied in voice analysis, instruments, etc., and can solve the problems of program freeze, frame loss, long processing time, etc.

Active Publication Date: 2012-07-25
HUNDSUN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the existing receiver analyzes and processes the digital intermediate frequency data of the entire frame, sometimes the processing time of the analysis is too long, and the analysis process will not be completed until the processor completes the receiving and buffering of the next frame of digital intermediate frequency data , therefore, there may be frame loss, and then there will be a phenomenon of program freeze, which will eventually affect the quality of audio playback

Method used

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  • Method and device for analyzing digital audio broadcasting signals
  • Method and device for analyzing digital audio broadcasting signals
  • Method and device for analyzing digital audio broadcasting signals

Examples

Experimental program
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Embodiment 1

[0025] see figure 2 , which is a flow chart of an embodiment of a method for analyzing digital audio broadcasting signals of the present application, including the following steps:

[0026] Step 201: If the current digital intermediate frequency data frame received by the receiver is the first data frame to be parsed, digital down-conversion DDC processing is performed on the broadcast data of all broadcast channels in the current digital intermediate frequency data frame to obtain baseband data, otherwise, the The broadcast data of the current broadcast channel in the current digital intermediate frequency data frame is processed by DDC to obtain the baseband data;

[0027] As specified in the ETSI 300 401 standard, see image 3 , which is a schematic diagram of a transmission frame structure of a DAB signal. Such as image 3 As shown, at the transmitter side, a transmission frame of a DAB signal includes several OFDM symbols, which are divided into a synchronization sign...

Embodiment 2

[0048] The method for analyzing the data audio broadcasting signal in receiving the data audio broadcasting signal will be described in detail below. see Image 6 , which is a specific implementation flowchart of a digital audio broadcasting signal analysis method of the present application. Include the following steps:

[0049] Step 601: When the digital intermediate frequency data buffered by the digital audio broadcast signal receiver reaches the length of one frame, judge whether the current digital intermediate frequency data frame is the first data frame, if yes, enter step 602, otherwise, enter step 603;

[0050] Step 602: DDC processing is performed on the broadcast data of all broadcast channels in the first data frame to obtain baseband data, and enter step 605;

[0051] Step 603: According to the zero symbol position in the last digital intermediate frequency data frame and the starting position of the time slot occupied by the broadcast data of the current broadc...

Embodiment 3

[0061] Corresponding to the above-mentioned method for analyzing a digital audio broadcasting signal, an embodiment of the present application further provides an apparatus for analyzing a digital audio broadcasting signal. see Figure 7 , which is a structural diagram of an embodiment of an apparatus for analyzing digital audio broadcasting signals in the present application. The device includes: a digital down-conversion processing unit 701, a synchronization processing unit 702, and a demodulation and decoding processing unit 703, wherein,

[0062] The digital down-conversion processing unit 701 is used to perform DDC processing on the playback data of all broadcast channels in the current digital intermediate frequency data frame if the current digital intermediate frequency data frame received by the receiver is the first data frame to be parsed to obtain baseband data, Otherwise, DDC processing is carried out to the play data of the current broadcast channel in the curr...

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Abstract

The embodiment of the invention discloses a method and a device for analyzing digital audio broadcasting signals. The analyzing method comprises the following steps: carrying out digital down-conversion (DDC) processing on playing data of all playing channels in the current data frame so as to obtain base band data if the current data frame is a first frame, if not, acquiring the position of the playing data of the current playing channel in the current data frame, and carrying out DDC processing on the playing data of the current playing channel in the position of the current data frame so as to obtain the base band data; carrying out frame synchronous processing on the base band data; and respectively carrying out demodulation and decoding processing on the base band data being subjected to frame synchronous processing so as to obtain the played data. The method and the device can be used for reducing the voice frequency analyzing and processing time, thereby avoiding the phenomenon that the frame is clamped when the program is displayed.

Description

technical field [0001] The present application relates to the technical field of audio processing, in particular to a method and device for analyzing digital audio broadcasting signals. Background technique [0002] Digital Audio Broadcasting (Digital Audio Broadcasting, DAB) is the third-generation broadcasting mechanism after AM and FM broadcasting. It uses digital technology as a means to transmit high-quality sound programs and data from broadcasting organizations to mobile, fixed or portable receivers. business. The ETSI 300 401 standard is the only specification for the global digital audio broadcasting system recommended by the ITU so far. [0003] see figure 1 , which is a schematic diagram of a digital audio broadcast signal receiver in the prior art. Among them, when the DAB wireless signal is converted into digital intermediate frequency data through antenna coupling, tuning of the radio frequency module and conversion of the analog-to-digital conversion module...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00
Inventor 安禹坤王立宁王瀚
Owner HUNDSUN TECH