Speex

Speex

The study and implementation of VoIP voice terminal system based on android platform

Published in Jimmy C.M. Kao, Wen-Pei Sung, Civil, Architecture and Environmental Engineering, 2017

We use Audio development framework provided by Android media library to acquire and play voice signals. Audio Record provided by Audio framework is used to record the voice and Audio Track is used to play the voice[4]. We also employ Speex Algorithm to compress and encode voice signals. RTP and UDP protocols are used to pack and transmit voice signals.

A SILK Adaptive Steganographic Scheme Based on Minimizing Distortion in Pitch Domain

View Article

Journal Information

Published in IETE Technical Review, 2021

Yanzhen Ren, Shan Zhong, Weiping Tu, Hanyi Yang, Lina Wang

Steganography is a technique that hides secret message in digital carriers for covert communication without arousing any suspicion [1]. As a countermeasure of steganography, steganalysis aims to detect the existence of secret message in those carriers [2]. With the popularity of VOIP and instant voice chat in social application, SILK-compressed audio is widely used in Internet voice communication, such as Skype, WeChat, and Steam game platform. SILK speech codec [3] was first developed by Skype Limited and then incorporated into the Internet Engineering Task Force (IETF) as part of Opus codec, which is the standard of a new Internet wideband audio codec. The codec technology is based on Code Excited Linear Prediction (CELP) framework, combined with the coding principle of iLBC and Speex codec. It is an adaptive coding technology with high coding efficiency in low-rate network environment.

Explore chapters and articles related to this topic

The study and implementation of VoIP voice terminal system based on android platform

A SILK Adaptive Steganographic Scheme Based on Minimizing Distortion in Pitch Domain