Floating-point Adaptive M Speech Cod
نویسنده
چکیده
The Adaptive Multi-Rate Wideband (AMR-WB) speech codec algorithm has been selected for wideband speech coding in wireless and wireline services by both 3GPP and ITU-T. This paper describes an implementation of floating point Adaptive Multi-Rate Wideband (AMR-WB) codec that was approved by the Third Generation Partnership Project (3GPP) for multimedia applications.
منابع مشابه
Speech Enhancement by Modified Convex Combination of Fractional Adaptive Filtering
This paper presents new adaptive filtering techniques used in speech enhancement system. Adaptive filtering schemes are subjected to different trade-offs regarding their steady-state misadjustment, speed of convergence, and tracking performance. Fractional Least-Mean-Square (FLMS) is a new adaptive algorithm which has better performance than the conventional LMS algorithm. Normalization of LMS ...
متن کاملModifying LPC Parameter Dynamics to Improve Speech Coder Efficiency
Reducing the transmission bandwidth and achieving higher speech quality are primary concerns in developing new speech coding algorithms. The goal of this thesis is to improve the perceptual speech quality of algorithms that employ linear predictive coding (LPC). Most LPC-based speech coders extract parameters representing an all-pole filter. This LPC analysis is performed on each block or frame...
متن کاملA block floating point treatment to finite precision realization of the adaptive decision feedback equalizer
A scheme for efficient realization of the adaptive decision feedback equalizer (ADFE) is presented using the block floating point (BFP) data format which enables the ADFE to process rapidly varying data over a wide dynamic range, at a fixed point like complexity. The proposed scheme adopts appropriate BFP format for the data as well as the filter weights and works out separate update relations ...
متن کاملAdaptive precision LLL and Potential-LLL reductions with Interval arithmetic
Lattice reduction is fundamental in computational number theory and in computer science, especially in cryptography. The celebrated Lenstra–Lenstra–Lovász reduction algorithm (called LLL or L) has been improved in many ways through the past decades and remains one of the central tool for reducing lattice basis. In particular, its floating-point variants — where the long-integer arithmetic requi...
متن کاملEvaluation of a Floating Point Acoustic Echo Canceller Implementation
This master thesis consists of implementation and evaluation of an AEC, Acoustic Echo Canceller, algorithm in a floating-point architecture. The most important question this thesis will try to answer is to determine benefits or drawbacks of using a floating-point architecture, relative a fixed-point architecture, to do AEC. In a telephony system there is two common forms of echo, line echo and ...
متن کامل