| 摘要 |
This invention relates to an apparatus for encoding and transmitting an image. The apparatus includes a vector quantizer. A quantization preprocessing circuit is used for subsampling an image signal, for thinning out pixels from the image signal according to a pixel ratio, and for generating from the pixel signal an n-dimensional vector. A group of input buffers are used to store each input vector in a sequence for quantization processing and for repetitiously reading the input vector at an interval of the processing period. A vector output circuit is used to prepare the output vector corresponding to a probability distribution of the input vector and for selecting and outputting the output vector based on an index input. The distance between the input vector and the output vector is calculated by the distortion computation circuit. An index output generating means is used to generate an index for a processing period based on the calculated distance value from the encoding section. Finally, a quantized index output circuit will generate an index of a quantizer from the generated index and will output the index. |
