An Intelligent way of Bit-rate Reduction in Real Time Audio Systems by the use of Psychoacoustic Masking

Abstract

Today analog audio is a thing of the past. With the advent of digital audio, the rush for storage space and bandwidth have been tremendous. Digital audio compression enables more efficient storage and transmission of audio data. Many forms of audio compression techniques exists offering a range of encoder and decoder complexity, myriad audio quality, and differing amounts of data compression. They range from μ-law transformation to MUSICAM algorithm. The MPEG audio standards provide a wide range of compression, audio quality and encoder/decoder complexity. This document suggests a way of achieving real time audio compression with emphasis on MPEG standards which is brilliant combination of the existing compression techniques.

Indexing terms:

• Psychoacoustic
• Polyphase fiter bank

Additional information

Notes on contributors

R Murali

R Murali is a Bachelor of Technology in Electronics & Communication Engg from College of Engineering Trivandrum. He is currently working with Wipro Technologies, Bangalore. He aptitude mainly lies in management.

S Ramanathan

S Ramanathan is a Bachelor of Technology in Applied Electronics & Instrumentation Engg. from College of Engineering Trivandrum. He is currently working with Wipro Technologies, Bangalore. His interests include Digital Signal Processing & Networking.

Ratheesh R Pai

Ratheesh R Pai is Bachelor of Technology in Electronics & Communication Engg. from College of Engineering Trivandrum. He is currently working with Wipro Technologies, Bangalore. Software simulation & Mathematical modelling are his forte.

K Sivaram

K Sivaram is a Bachelor of Technoloy in Electronics & Communication Engg from College of Engineering Trivandrum. His areas of interests include Mobile communication.

K C Ravindranathan

Ravindranathan K C passed out with distinctions the BSc (Engg) degree examination in 1984 from College of Engineering, Universityt of Kerala. He was with Bharat Electronics, Bangalore from March 1985 to June 1988, working as Design Engineer, R&D broadcast Transmitters. During his tenure over there, he was awarded a prize for suggesting a new corporate motto. He joined the Department of Electronics & Communication Engineering, College of Engineering, Thiruvananthapuram as Lecturer in June 1988, where he is an Assistant Professor at present. He did his master's degree (ME) in Electrical Communication Engineering (specializing in Optical/Computer Communications) at Indian Institute of Science, Bangalore in 1993. Ravindranathan has published more than five papers in various national journals and conference proceedings. As part of his academic work, he has guided eight MTech projects and several undergraduate projects. He is a life member of ISTE, member of IEEE and IETE, His research interests include Speech/Video Compression, Neural Networks, Fuzzy Logic and Optical Networks.