Method of audio compression based on IP intercom system

Abstract

A method of audio compression based on an IP intercom system comprises the following steps that (1) audio signals are normalized, and two-dimensional signals are established; (2) the Euclidean distance from a sampling point to a far point is calculated; (3) the critical radius R is determined; (4) the audio signals are classified; (5) classified quantization is conducted; (6) encoding and sendingare conducted; and (7) decoding and playback are conducted. According to the method of audio compression based on the IP intercom system, the transmission efficiency is high, the bandwidth utilizationratio is high, and call delay and the speech quality are balanced; two-dimensional K-means and uniform quantization algorithms are applied to speech data in IP intercom, and the two-dimensional K-means and uniform quantization algorithms are uniformly named as a two-dimensional k-u algorithm; and in the IP intercom, acquisition, quantification and coding of the speech data are completed, and thetransmission cost, the transmission bandwidth and the speech quality are considered jointly, so that optimization of the transmission efficiency and the speech quality is realized.

Description

technical field [0001] The invention relates to the field of audio processing, in particular to an audio compression method in an IP-based intercom system. Background technique [0002] In recent years, domestic emergencies have emerged one after another, and the social demand for efficient handling of emergencies and information security has continued to increase, and IP intercom has played an increasingly important role in it. However, in emergencies, the network status is often not well guaranteed. Therefore, an IP intercom system with low network requirements and high voice quality is particularly important. A crucial part of this is the compression of the audio. By compressing audio, transmission cost and bandwidth can be reduced, and the efficiency of voice transmission can be improved. [0003] The audio compression methods used in traditional IP intercom mainly include G.711, G.723, G.728, G.729, etc. [0004] G.711 is a non-linear quantization of voice analog sig...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the deficiencies of the prior art, such as low transmission efficiency, low bandwidth utilization, and high equipment and network requirements, the present invention provides an audio compression method based on an IP intercom system, which has the following characteristics: ① High transmission efficiency ② High bandwidth utilization ③Consider both call delay and voice quality

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