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Method and system for dab low-latency real-time voice broadcasting

A technology of real-time voice and broadcasting systems, applied in broadcasting system types, digital audio broadcasting, transmission systems, etc., can solve problems such as unusable chips and terminals, and achieve the effect of shortening the delay

Active Publication Date: 2022-07-08
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the difficulties is that the design must be carried out under the existing DAB standard framework, especially the physical layer of the DAB system cannot be changed, otherwise the existing chips and terminals will be unusable; the second is that the delay should not exceed 200ms, and the longer the Smaller is better to ensure a good speaking experience

Method used

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  • Method and system for dab low-latency real-time voice broadcasting
  • Method and system for dab low-latency real-time voice broadcasting
  • Method and system for dab low-latency real-time voice broadcasting

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Embodiment Construction

[0043] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of ​​the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0044] Among them, the accompanying drawings are only used for exemplary description, and represent only schematic diagrams, not physical drawings, and should not be ...

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Abstract

The invention relates to a method for DAB low-delay real-time voice broadcasting, which belongs to the technical field of digital signal broadcasting. , encapsulate each EVS frame into the FIB of 1 DAB; S3: Use DAB mode III to synthesize DAB transmission frames, and allocate 6 consecutive FIBs containing EVS frames in 5 DAB transmission frames for transmission according to certain rules; S4: Receive DAB frames, use EVS to decode, and play audio. It also relates to a DAB low-latency real-time voice broadcasting system. The present invention eliminates the time interleaving delay existing in the audio transmission through the DAB main service channel and greatly shortens the encoding and decoding time. The overall delay of the actual system does not exceed 100ms, which is lower than the human ear perceptible delay, thereby realizing DAB-based low-delay. Live voice broadcast.

Description

technical field [0001] The invention belongs to the technical field of digital signal broadcasting, and relates to a DAB low-delay real-time voice broadcasting method and system. Background technique [0002] Digital Audio Broadcasting (DAB) is a new type of broadcasting system that gradually replaces traditional FM broadcasting with the continuous development of broadcasting technology, and is the product of the development of digital technology. Compared with the traditional broadcasting system, DAB has better listening quality and anti-interference ability, and also has a series of advantages such as low transmit power, large coverage area, high spectrum utilization and mobile reception. Compared with traditional analog wireless broadcasting, DAB can transmit high-quality digital sound, and can transmit pictures, text, video, etc. at the same time. Compared with wireless technologies such as WIFI and Bluetooth, DAB has a much longer transmission distance and can achieve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L65/60H04L65/80H04H20/00
CPCH04L65/60H04L65/80H04H20/00H04H2201/20Y02D30/70
Inventor 杨虹朱金晨张红升费林坤刘红江
Owner CHONGQING UNIV OF POSTS & TELECOMM