Patent ID: 6064324
Filing Date: 2000-05-16
Classification: H04N

Abstract:
A digital signal encoding and decoding method wherein the encoding side comprises the steps of:dividing a digital signal into small blocks;calculating a quantization width for each small block to be encoded based on an amount of encoded data of a small block which has already been encoded;quantizing the digital signal of each small block to be encoded, obtained by the division into small blocks, by using the calculated quantization width; andgenerating encoded data of each small block to be encoded according to a quantized index which is a digital signal after the quantization, andthe decoding side comprises the steps of:decoding the quantized index according to received encoded data of each small block to be decoded;calculating a quantization width for each small block to be decoded based on an amount of encoded data which have already been received before the encoded data of the small block to be decoded is received;inversely quantizing the quantized index for each small block, which is a digital signal after the decoding, by using the calculated quantization width; andregenerating a digital signal by combining the divided small blocks, andwherein the generated encoded data does not include information used for calculating the quantization width of the relevant small block and information on the quantization width.