A method and device for calculating pitch cycle in packet loss concealment and a readable medium

By optimizing the calculation method of the fundamental period in packet loss concealment and using the Taylor expansion method to replace square root and division operations, the amount of calculation is reduced, the problem of excessive calculation in the existing technology is solved, and low-power and low-cost fundamental period calculation is achieved.

CN115954008BActive Publication Date: 2025-10-10CHENGDU HUAYAOXIN TECH CO LTD
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Patent Information

Application Number
CN202211582349.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-09
Publication Date
2025-10-10
Estimated Expiration
2042-12-09

AI Technical Summary

Technical Problem

The existing technology uses a low-power and low-cost chip to calculate the correlation coefficient of the fundamental frequency period in packet loss concealment, which results in excessive computational complexity, high power consumption, high cost, and the need to add a hardware acceleration circuit.

Method used

By removing the calculation of the template window total energy and x2, adjusting the calculation process of the sliding window total energy and y2, and using the Taylor expansion method to approximately replace the 1/sqrt(z) operation, and using multiplication, shift and addition and subtraction to replace division and square root operations, the calculation process of the correlation coefficient is optimized.

Benefits of technology

It greatly reduces the amount of calculation, lowers hardware cost and power consumption, is suitable for implementation on low-power and low-cost chips, and the accuracy of the calculation results is sufficient to meet the needs of packet loss concealment.

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Abstract

The application discloses a method and device for calculating pitch period in packet loss concealment and a readable medium, wherein the method obtains the pitch period through a correlation coefficient method, and in the calculation process of the correlation coefficient, the calculation of the total energy of a template window and x2 is removed, the calculation process of the total energy of a sliding window and y2 is adjusted, and a Taylor expansion method is used to obtain an approximation equation, the operation of 1 / sqrt(z) is approximately replaced by the approximation equation, which is equivalent to removing the division and square root (sqrt) operation in the previous algorithm and replacing them only with multiplication, shifting and addition and subtraction, so that the total calculation amount is greatly reduced, even if the hardware acceleration circuit is implemented in this way, the hardware area is greatly reduced, and cost and power consumption can be effectively saved.
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