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Dynamic data transmission method of drm+ system based on human ear perception

A data transmission method and system dynamic technology, applied in the field of broadcasting digitization, can solve the problems of large changes in audio quality and insufficient spectrum utilization.

Inactive Publication Date: 2016-03-30
苏州威士达信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the spectral bandwidth occupied by the analog signal changes in real time, while the spectral position and spectral width of the digital signal are fixed, resulting in insufficient spectrum utilization, and the audio quality heard by the human ear varies greatly in different time periods

Method used

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  • Dynamic data transmission method of drm+ system based on human ear perception
  • Dynamic data transmission method of drm+ system based on human ear perception
  • Dynamic data transmission method of drm+ system based on human ear perception

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0022] The present invention specifically comprises the following steps:

[0023] Step 1: Generate a digital-analog simulcast mixed signal according to the spectrum format specified in the DRM+ standard, wherein the spectrum of the FM analog signal is located at -100 to 100 kHz, and the spectrum of the DRM+ digital signal is located at 100 to 200 kHz;

[0024] Step 2, pass the digital-analog mixed signal through the DRM+ test system, and use the signal before the test system as the reference signal Ref all , the signal with channel noise superimposed after the test system is used as the test signal Test all , the PEAQ model utilizes Ref all and...

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Abstract

The invention discloses a method for sending dynamic data of a DRM+ system based on human ear perception. DRM+ is used as an FM broadcast digitization scheme, and the frequency gap of existing stimulation FM broadcast is utilized to conduct digital broadcasting. An ITU-R BS. 1387-1 psychoacoustic model is used as a basis, stimulation audio receiving quality of different digital signals at frequency spectrum positions is analyzed, under the guidance of the original signal NMR evaluation scale, digital signal frequency spectral bandwidths of framing audio are dynamically adjusted, the number of subcarriers transmitted by the digital signals are guided, and a scheme for sending the dynamic data of the DRM+ system is formed. The method aims to fully utilize idle frequency spectrums and improve the transmission capacity of the digital signals in the DRM+ system on the premise that uniformity of the quality of audio signals in different time periods is guaranteed.

Description

technical field [0001] The invention relates to the field of broadcast digitization. Specifically, it relates to a method for dynamically adjusting the frequency spectrum bandwidth of digital signals in the DRM+ system, which is a smooth transition solution for FM broadcasting digitization. Background technique [0002] DRM+ is a digital technology for FM broadcasting. It can use the frequency gap of existing analog FM broadcasting for digital broadcasting. It is compatible with the existing analog FM broadcasting in my country and can realize the smooth transition of FM broadcasting from analog to digital. DRM+ adopts COFDM multi-carrier transmission technology, data services can include all data services (audio, video or data) transmitted through DRM and DAB, and the data rate can reach up to 186kbps. figure 1 For the DRM+ spectrum structure, the digital signal radio frequency bandwidth is less than 100kHz, and the distance between the DRM+ signal center frequency and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 方伟伟杨刚万欣王威王菲焦玮
Owner 苏州威士达信息科技有限公司