摘要 |
PROBLEM TO BE SOLVED: To provide a method for improving compression efficiency of distributed source coding (DSC) of an image.SOLUTION: In a decoder, a desired image is estimated by retrieving and extracting coding modes from an encoded side information image. For each bitplane in the encoded side information image, syndrome bits or parity bits are decoded to obtain an estimated bitplane of quantized transform coefficients of the desired image. Quantization and transform are applied to a prediction residual obtained using the coding modes. Decoding uses the quantized transform coefficients of the encoded side information image and is based on previously decoded bitplanes in a causal neighborhood. The estimated bitplanes of the quantized transform coefficients of the desired image are combined to produce combined bitplanes. Then, inverse quantization, inverse transform and prediction based on the coding modes are applied to the combined bitplanes to recover an estimated value of the desired image. |