Speech Compression

Speech Compression

Speech compression is a key technology underlying digital cellular communications, VoIP, voicemail, and voice response systems. We trace the evolution of speech coding based on the linear prediction model, highlight the key milestones in speech coding, and outline the structures of the most important speech coding standards. Current challenges, future research directions, fundamental limits on ...

Speech Compression using ADPCM

We propose a simple speech compression algorithm using subband division and ADPCM (Adaptive Differential Pulse Code Modulation) algorithm. Although speech data are stored in a semiconductor memory device, its capacity and the available network capacity are limited. Therefore, it is necessary to compress the data as much as possible. The first is that the reconstructed datum must be understood c...

Speech Compression Using Wavelets

This is to certify that the project titled " Speech Compression using Wavelets " is a bona fide record of the project work done by Name University No. This is to certify that the project titled " Speech Compression using Wavelets " is a bona fide record of the project work done by Name University No. Date: iv PREFACE PREFACE Multimedia files in general need plenty of disk space for storage apar...

Speech Compression and Synthesis

Recognition-compatible Speech Compression for Stored Speech

Two important components of a speech archiving system are the compression scheme and the search facility. We investigate two ways of providing these components. The first is to run the recogniser directly from the compressed speech – we show how even with a 2.4kbit/sec codec it is possible to produce good recognition results; but the search is slow. The second is to preprocess the speech and st...