Very Low Bit Rate Audio Coding Development

نویسنده

  • Bernd Edler
چکیده

Audio coding at very low bit rates requires very efficient evaluation of characteristics of the signal sources and of perceptual properties of the human ear. An overview of models for the signal source employed in different coding schemes is given. Some of the basic concepts for perceptual quantization and coding of model parameters are shown, including approaches for scaleability with respect to bit rate and quality.

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

Low Complexity Parametric Stereo Coding in Mpeg - 4

Parametric stereo coding in combination with a State-of-the-Art coder for the underlying monaural audio signal results in the most ef cient coding scheme for stereo signals at very low bit rates available today. This paper reviews those aspects of the parametric stereo paradigm that are important for audio coding applications. A complete parametric stereo coding system is presented, which was r...

متن کامل

Data Hiding in Multimedia Audio using VLSI technology

This paper is devoted to VLSI technology for high security purpose. Textual information is embedded in to an audio using LSB coding and it is encrypted and decrypted by Steganography algorithm. Low bit encoding or Least Significant Bit (LSB) encoding technique is proposed to encode the least significant bit of a host file with a bit of the Steganography data. This method assumes that this alter...

متن کامل

Advances in Parametric Audio Coding

Parametric modelling provides an efficient representation of general audio signals and is utilised in very low bit rate audio coding. It is based on the decomposition of an audio signal into components which are described by appropriate source models and represented by model parameters. Perception models are utilised in signal decomposition and model parameter coding. This paper gives a brief t...

متن کامل

Very low bit rate parametric audio coding

In this thesis, a parametric audio coding system for very low bit rates is presented. It is based on a generalized framework that combines different source models into a hybrid model and thereby permits flexible utilization of a broad range of source and perceptual models. The developed parametric audio coding system allows efficient coding of arbitrary audio signals at bit rates in the range o...

متن کامل

Low Complexity, Low Delay and Scalable Audio Coding Scheme Based on a Novel Statistical Perceptual Quantization Procedure

In this paper we present Fast Perceptual Quantization (FPQ), a novel procedure to quantize and code audio signals. It employs the same psychoacoustics principles used in the popular MPEG/Audio coders, but substantially simplifies the complexity and computational needs of the encoding process. FPQ is based on defining a hierarchy of privileged quantization values so that the masking threshold ca...

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 1997