Efficient Hardware/Software Implementation of LPC Algorithm in Speech Coding Applications

Efficient Hardware/Software Implementation of LPC Algorithm in Speech Coding Applications

The LPC “Linear Predictive Coding” algorithm is a widely used technique for voice coder. In this paper we present different implementations of the LPC algorithm used in the majority of voice decoding standard. The windowing/autocorrelation bloc is implemented by three different versions on an FPGA Spartan 3. Allowing the possibility to integrate a Microblaze processor core a first solution cons...

LPC Quantization and Interpolation in Coding for Speech Storage Applications

In this paper, personalized quantization of the filter coefficients of Linear Predictive Coding (LPC) is studied. The study covers two aspects. On the one hand, a signal-adaptive algorithm which determines when to transmit a set of LPC coefficients is introduced. This algorithm allows a reduction of about 35% of the bit rate needed to code the LPC coefficients in speech storage applications – e...

Real Time Implementation of an Lpc Algorithm . Speech Signal Processing

An Efficient Time Domain Speech Compression Algorithm Based on LPC and Sub-Band Coding Techniques

Speech compression is a mature technology with many applications. Over the past decade, huge advances have been made in the area of speech coding for reduced bit-rate transmission. With perceptual audio coding, the signal is coded efficiently using a psychoacoustic model, as in MPEG standards. In this paper, two well known algorithms, LPC (Linear Predictive Coding) and subband coding are combin...

Speech Compression Using Linear Predictive Coding(lpc)

One of the most powerful speech analysis techniques is the method of linear predictive analysis. This method has become the predominant technique for representing speech for low bit rate transmission or storage. The importance of this method lies both in its ability to provide extremely accurate estimates of the speech parameters and in its relative speed of computation. The basic idea behind l...