Patent ID: 6026191
Filing Date: 2000-02-15
Classification: H03M,H04N

Abstract:
A digital coding apparatus comprising:a transform circuit for performing a discrete cosine transform with respect to inputted data so as to:generate a DC coefficient and AC coefficients based on a result of the transform;output said DC coefficient and AC coefficients;a variable-length coding circuit for individually coding the DC coefficient and the AC coefficients, each outputted from said transform circuit, into a DC code and AC codes; anda fixed-length data generating circuit for generation plural items of fixed-length data based on the DC code and the AC codes, each outputted from said variable-length coding circuit, whereinsaid fixed-length data generating circuit generating the leading item of fixed-length data from said DC code and a leading portion of said AC codes, while sequentially generating the items of fixed-length data other than the leading one from a remaining portion of said AC codes; andthe sum of a code length of said DC code and a code length of an EOB code representing an end position of the AC codes is always equal to or shorter than a length of said fixed-length data.