Scalar quantization error analysis for image subband coding using QMFs
نویسندگان
چکیده
منابع مشابه
Image Subband Coding Using Progressive Classiication and Adaptive Quantization
Adaptive compression methods have been a key component of many of the recently proposed subband (or wavelet) image coding techniques. This paper deals with a particular type of adaptive subband image coding where we focus on the image coder's ability to adjust itself on the y to the spatially varying statistical nature of image contents. This backward adaptation is distinguished from more frequ...
متن کاملSubband coding of images using vector quantization
Subband coding has proven to be a powerful technique for medium bandwidth source encoding of speech. Recently, some promising results have been reported on the extension of this concept to the source coding of images. In this paper, a new two-dimensional subband coding technique is presented which is also applied to images. A frequency band decomposition of the image is carried out by means of ...
متن کاملSubband Coding of Images Using Predictive Vector Quantization
In this paper, two bfferent schemes for predictive vector quantization (VQ) of subband decomposed images are investigated. The aim is to reduce the quantization error by incorporating memory into the VQ scheme. The first scheme is a form of finite-state VQ FSVQ) which we will call subband FSVQ (SB-FSVQ) and the second is a form of predictive VQ (PVQ) applied to image subbands. We will refer to ...
متن کاملScalar Quantization for Audio Data Coding
— This paper is concerned with scalar quantization of transform coefficients in an audio codec. The generalized Gaussian distribution (GGD) is used as an approximation of one-dimensional probability density function for transform coefficients obtained by modulated lapped transform (MLT) or modified cosine transform (MDCT) filterbank. The rationale of the model is provided in comparison with the...
متن کاملPerceptual dithering for octave subband image coding
Octave subband coding has been used as an efficient image coding approach for various well-known standards such as MPEG-4 and JPEG-2000. Although the sub-images in the octave subband representation have low statistical correlation, the visual similarity among the sub-images indicates that there exists some unexploited perceptual redundancy between sibling bands in addition to the parent–child r...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 1992
ISSN: 1053-587X
DOI: 10.1109/78.124952