Interleaved reception method for restored vector quantization image

Modified Vector Quantization Method for Image Compression

A low bit rate still image compression scheme by compressing the indices of Vector Quantization (VQ) and generating residual codebook is proposed. The indices of VQ are compressed by exploiting correlation among image blocks, which reduces the bit per index. A residual codebook similar to VQ codebook is generated that represents the distortion produced in VQ. Using this residual codebook the di...

Interleaved Quantization for Near-Lossless Image Coding

Signal level quantization, a fundamental component in digital sampling of continuous signals such as DPCM, or in near-lossless predictive-coding based compression schemes of digital data such as JPEG-LS, often produces visible banding artifacts in regions where the input signals are very smooth. Traditional techniques for dealing with this issue include dithering, where the encoder contaminates...

Vector Quantization for Image Compression-Concept Quantization

Multipurpose Image Watermarking Method Based on Mean-removed Vector Quantization

Digital watermarking technique has been presented and widely researched to solve some important issues in the digital world, such as copyright protection, copy protection, and content authentication. Conventional watermarking algorithms are mostly based on discrete cosine transform (DCT), discrete Fourier transform (DFT), and discrete wavelet transform (DWT). Most of these algorithms are design...

Image Vector Quantization for Interframe Coding Applications

In this paper, an interframe image coding via vector quantization (VQ) is considered. Here, we identify the moving vectors in each frame using a block matching technique. A prediction is estimated by searching in the direction of minimum distortion in the previous reconstructed frame, then the differential vectors are quantized via a modified VQ to achieve high compression. Simulations have sho...