Name: Efficient Methods for the Celp Speech Coding Algorithm: Design a Predictive Coding of Speech at low bit Rates (en Inglés)
SKU: 62583390
Price: 298815.00 COP
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Author: Nemir Al-Azzawi

portada Efficient Methods for the Celp Speech Coding Algorithm: Design a Predictive Coding of Speech at low bit Rates (en Inglés)

Efficient Methods for the Celp Speech Coding Algorithm: Design a Predictive Coding of Speech at low bit Rates (en Inglés)

Formato

Libro Físico

Editorial

Lap Lambert Academic Publishing

Autor

Nemir Al-Azzawi

Idioma

Inglés

N° páginas

160

Encuadernación

Tapa Blanda

ISBN13

9783659747434

Efficient Methods for the Celp Speech Coding Algorithm: Design a Predictive Coding of Speech at low bit Rates (en Inglés)

Nemir Al-Azzawi (Autor) · Lap Lambert Academic Publishing · Tapa Blanda

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Reseña del libro "Efficient Methods for the Celp Speech Coding Algorithm: Design a Predictive Coding of Speech at low bit Rates (en Inglés)"

High quality, low bit rate speech coding system is becoming increasingly important in the world of modern telephone. Code excited linear predictive (CELP) coding is most efficient method for high quality speech coding at low bit rate. Most complexity in CELP coders comes from the search procedure used to determine the optimum innovation sequence. This book presents a study of three CELP coder algorithms, which are based on the goal of reducing the search procedure to minimum possible with good speech quality. The CELP coders' algorithm was found to give quite good-quality speech at 4.8 kb/s using autocorrelation approach, but still required high computation. A binary CELP coder algorithm is built on the two possible values -1 and +1 set of waveforms for an excitation bit rate of one bit per sample. The internal algebraic structure of the codebook leads to efficient and fast algorithm for selecting the optimum excitation. The proposed ternary CELP coder algorithm produces the same speech quality as obtained by CELP coders without needing any excitation codebook. A special algorithm has been developed for very low data rate 2.4 kb/s.