A Low-delay Speech Coder

نویسندگان

  • HONGMAO SUN
  • CHUNYAN WANG
چکیده

This paper presents an efficient low-delay CELP speech coder based on a structure given by Chen et el. [1]. The proposed coder can operate at a rate of 8 Kb/s and has an arithmetic complexity that is 20% lower than that of the CELP of [1] with an acceptable increase in the delay. The proposed coder has been tested to provide a good-quality speech.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A low-delay wideband speech coder at 24-kbps

A novel low-delay wideband speech coder, called Multiband CELP (MB-CELP) achieves a delay of about 10 ms, by exploiting time-domain correlations with a twostage linear prediction scheme. A low-order forwardadaptive LP stage models coarse shape, and a highorder backward-adaptive LP stage models ne structure of the input spectrum. A conditional pitch prediction method improves the performance of ...

متن کامل

A Low Delay 16 kb / s

Absrruct-This paper studies a speech coder using a tree code generated by a stochastic innovations tree and backward adaptive synthesis filters. The synthesis configuration uses a cascade of two all-pole filters: a pitch (long time delay) filter followed by a formant (short time delay) filter. Both filters are updated using backward adaptation. The formant predictor is updated using an adaptive...

متن کامل

Low-Delay 16 kb/s Wideband Speech Coder with Fast Search Methods

In this paper, a low delay 16 kb/s wideband speech coder with a buffering delay of 1.25 ms is introduced. This coder is basically inspired from the G.728 LD-CELP standard for narrowband speech signals. Our main goal is to reduce the implementation complexity of our wideband G728 – like coder, which is mainly due to the search of the optimal excitation (gain-shape) in codebook. For this reason a...

متن کامل

Multimode Tree Coding of Speech with Perceptual Pre-weighting and Post-weighting

A low delay and low complexity speech coder based on Multimode Tree Coding is proposed. In our Multimode Tree Coder, a simple mode classification method along with frame energy are used to classify the input speech frames into five different modes. Each mode is coded at a suitable bit-rate using a Tree coder with computationally efficient perceptual error pre-weighting and post-weighting filter...

متن کامل

A multi-band CELP wideband speech coder

A novel low-delay wideband speech coder, called Multiband CELP (MB-CELP), overcomes the major obstacles usually associated with two traditional CELP approaches to wideband speech coding namely fullband CELP and split-band CELP. The new MB-CELP coder employs a multi-band bank of o -line ltered excitation codebooks, fullband linear prediction synthesis, and minimization of the error between origi...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1998