Technical Report 2007-02-01
Internetworking and Media Communications Research Laboratories
Department of Computer Science, Kent State University
http://medianet.kent.edu/technicalreports.html


 

 

Symbiotic Audio Communication on Interactive Transport

 

Olufunke I. Olaleye and  Javed I. Khan

 

Networking and Media Communications Research Laboratories

Department of Computer Science, Kent State University

 233 MSB, Kent, OH 44242

 

Last Revised February 23, 2007

 

Abstract

 

Audio perception is highly susceptible to disturbance in temporal quality. In the event of congestion, audio datagrams suffer packet loss, delay, and jitter. Compressed audio appears as one of the most delicate traffic-type to handle on the Internet. The recent advances in auditory perception promise opportunities where a perceptually clever adaptive audio system can respond to impending breakdown and support near flawless sound. The major problem is however receiving fast feedback from the current Internet. Recently proposed TCP Interactive (iTCP) seems to offer some interesting opportunity to perceptual audio. This is operationally state equivalent to the conventional TCP except applications can optionally subscribe and receive selected local end-point protocol events in real-time. We recently implemented a novel symbiotic perceptual audio streaming mechanism, which receives fast feedback from iTCP about congestion and responds. We have tested it live over the Internet. In this paper, we share the performance of this system and report observed dramatic improvements in time-bounded streaming audio.

 

This report contains experiment samples used in testing the performance of this system. These are MPEG-1 ISO/IEC 11172-3 audio streams. The details of the experiments are in the main publications.

 

*The technical details of the algorithms are not included here. Since, the dump audio file using iOFF and Classic has all the received frames (without regard to the delay) the temporal distortion in streaming audio may not  be perceptible while playing stored audio.


 

 

Perceptually Encoded Audio Test Set:

 

Audio Qualities

Original

 

iOFF

 

Classic

 

iExp

 

Description

 

Subscribe, report event, but do not change bit rate. Used to measure overhead

Turn off all interactivity features. 

Full interactivity,  Use the exponential backoff symbiosis throttling

HighQmusic

highqmusic-orginal.wav

highqmusic-iOFF.mp3

highqmusic-iEXP.mp3

LowQmusic

lowqmusic-orignal.wav

lowqmusic-iOFF.mp3

lowqmusic-classic.mp3

lowqmusic-iEXP.mp3

Speech&Music

speechMusic-original.wav

speechMusic-iOFF.mp3

speechMusic-classic.mp3

speechMusic-iEXP.mp3