Coding apparatus for digital signals

摘要: In a coding apparatus for digital signal adapted implementing, every variable length block, floating processing to an input by using block circuit thereafter orthogonally transform components which have undergone such orthogonal circuits (e.g., DCT circuits), the is constructed so as determine of and coefficient on basis same index, e.g., maximum absolute value in that block. Thus, quantity subject can be reduced. addition, there may employed configuration divide, critical bands, spectrum signals frequency base from (Discrete Cosine Transform) determine, respective allowed noises masking taken into consideration compare these minimum audible curve generator at comparator. When grater than noise time, this considered divide band smaller bands carry out bit allocation rase or set flag. accurate level provided without increasing auxiliary information.