Signal encoding and decoding method and device

摘要: A method of encoding and decoding image and/or audio signals includes an step comprising previously preparing a quantization table which has pairs sam­pling interval quantized difference value, cal­culating value between given initial sampling point succeeding to the comparing calculated with table, searching most matching quan­tization level. The search is started from immediately then stopped upon finding index that level transmitted. comprises same as used in step, determining based on received, adding obtain decoded value. In case there are present two or more intervals, corresponding samples interporated. As result, prolonged flat parts signal shortened steeply changing parts, thereby providing compression fit for human visual auditory characteristics.